banaskandi pml block of cachar, a&aa b

286 Pages·2016·26.56 MB·English

DRAFT REPORT

E I A F P
NVIRONMENTAL MPACT SSESSMENT OR ROPOSED
D D (BKDB-A)
EVELOPMENT RILLING OF ONE WELL IN
B PML B C , A&AA B ,
ANASKANDI LOCK OF ACHAR ASIN
A
SSAM

PREPARED BY:

ONGC LIMITED SGS India Private Limited
226 Udyog Vihar Phase I
CINNAMARA, JORHAT,
Gurgaon – 122 016, Haryana, India
ASSAM
Tel: [phone]
PROJECT REFERENCE NUMBER: IN/ES- Fax: [phone]
EIA/2014-161

(VERSION 2.0) http://www.sgsgroup.in/

CONTRACT NO: 5010094119
TENDER NO: L26BC14015

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WHEN YOU NEED TO BE SURE
ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

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ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

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ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

CONTENTS
ABBREVIATIONS ................................................................................................................................................. 7
LIST OF TABLES ................................................................................................................................................. 9
LIST OF FIGURES .............................................................................................................................................. 11
CHAPTER 1: INTRODUCTION .......................................................................................................................... 21
1.1 Preamble ............................................................................................................................................................... 21
1.2 Project Proponent ................................................................................................................................................. 21
1.3 Purpose of the Report .......................................................................................................................................... 21
1.4 Location and Accessibility ................................................................................................................................... 22
1.5 Scope of the Study ............................................................................................................................................... 24
1.5.1 Base line data generation .................................................................................................................................... 24
1.5.2 Impact Assessment .............................................................................................................................................. 25
1.5.3 Risk Assessment .................................................................................................................................................. 25
1.5.4 Environmental Management & Monitoring Plan ................................................................................................. 26
1.5.5 Approach and Methodology ................................................................................................................................. 26
Structure of the Report .......................................................................................................................................................... 27
CHAPTER 2: PROJECT DESCRIPTION ........................................................................................................... 35
2.1 Preamble ............................................................................................................................................................... 35
2.2 Details of Project .................................................................................................................................................. 35
2.3 Need and Objectives of Project ........................................................................................................................... 39
2.4 Development drilling ............................................................................................................................................ 40
2.4.1 Pre-drilling activity ............................................................................................................................................... 43
2.4.2 Drilling activity ...................................................................................................................................................... 45
2.4.3 Well Decommissioning............................................................................................................................................ 52
2.5 Utilities .................................................................................................................................................................. 53
2.6 Sources of Pollution and Management ............................................................................................................... 55
2.6.1 Air Pollution .......................................................................................................................................................... 55
2.6.2 Noise Pollution ..................................................................................................................................................... 55
2.6.3 Waste water treatment and disposal ................................................................................................................... 55
2.6.4 Waste management .............................................................................................................................................. 57
2.7 Project Cost .......................................................................................................................................................... 58
CHAPTER 3: DESCRIPTION OF ENVIRONMENT ............................................................................................ 60
3.1 Introduction........................................................................................................................................................... 60
3.2 Environmental Setting .......................................................................................................................................... 60
3.3 Land Environment ................................................................................................................................................ 61
3.3.1 Topography& Drainage ........................................................................................................................................ 61
3.3.2 Geology ................................................................................................................................................................. 63
3.3.3 Seismicity and Floods .......................................................................................................................................... 64
3.3.4 Hydro-Geology ...................................................................................................................................................... 65
3.3.5 Land Use and Land Classification ....................................................................................................................... 67
3.4 Meteorology and Climate ..................................................................................................................................... 69
3.4.1 Climatic condition ................................................................................................................................................. 69
3.4.2 Regional Meteorology .......................................................................................................................................... 69
3.4.3 Site Specific Micro-Meteorology .......................................................................................................................... 74
3.5 Ambient Air Quality .............................................................................................................................................. 76
3.5.1 Ambient Air Sampling .......................................................................................................................................... 76
3.5.2 Results of Ambient Air Quality ............................................................................................................................ 79
3.6 Noise Environment ............................................................................................................................................... 81
3.6.1 Methods of monitoring ......................................................................................................................................... 82
3.6.2 Observations ......................................................................................................................................................... 82
3.7 Water Resource Quality ....................................................................................................................................... 84
3.7.1 Results & Discussions ......................................................................................................................................... 86
3.8 Soil Quality ............................................................................................................................................................ 91
3.8.1 Results and Discussions ..................................................................................................................................... 92
3.9 Ecological Environment ....................................................................................................................................... 94
3.9.1 Methodology ......................................................................................................................................................... 95
3.9.2 Floristic composition............................................................................................................................................ 97
3.9.3 Faunal Communities ............................................................................................................................................ 101
3.9.4 Aquatic Ecosystem ............................................................................................................................................... 106
3.10 Socio Economic Environment ............................................................................................................................. 107
3.10.1 The Study Area ................................................................................................................................................ 107
3.10.2 Methodology .................................................................................................................................................... 108
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ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

3.10.3 Baseline Socio-economic Status of The Study Area ..................................................................................... 109
3.10.3.1 Demographic Profile ........................................................................................................................................ 109
3.10.3.2 Infrastructure Resource Base ......................................................................................................................... 110
3.10.3.3 Economic Resource Base ............................................................................................................................... 112
3.10.3.4 Cultural and Aesthetic Attributes ................................................................................................................... 114
3.10.3.5 Medical & Public Health Facilities ................................................................................................................... 114
3.10.4 Outcome Of Socio-economic Survey ............................................................................................................. 115
3.10.5 Awareness and Opinion of People about the Project .................................................................................... 119
3.10.6 Community Consultation ................................................................................................................................ 120
CHAPTER 4: ANTICIPATED ENVIRONMENTAL IMPACTS AND MITIGATION MEASURES ...................... 123
4.1 Preamble ............................................................................................................................................................... 123
4.2 Impacts/Risks During Development Drilling of Well and Production ................................................................ 125
4.2.1 Components Creating Risks/Impacting to Natural Environment ....................................................................... 126
4.2.2 Risks/Impacts to Natural Environment ................................................................................................................ 127
4.2.2.1 Land Use Pattern ............................................................................................................................................. 127
4.2.2.2 Ecology............................................................................................................................................................. 127
4.2.2.3 Water Resources ............................................................................................................................................. 128
4.2.2.4 Water Quality.................................................................................................................................................... 128
4.2.2.5 Soil Quality & Contamination .......................................................................................................................... 129
4.2.2.6 Air environment ............................................................................................................................................... 130
4.2.2.7 Noise Environment .......................................................................................................................................... 137
4.2.2.8 Impact on Occupational Health and Safety .................................................................................................... 139
4.2.2.9 Components Creating Risks to Socio-Economic Environment .................................................................... 140
4.3 Risk/ Impact Mitigation Techniques .................................................................................................................... 143
4.4 Impact Evaluation ................................................................................................................................................. 147
CHAPTER 5: ANALYSIS OF ALTERNATIVES ............................................................................................... 151
5.1 Alternative Location for the Proposed Project ................................................................................................... 151
5.2 Alternative Drilling Locations .............................................................................................................................. 151
5.3 Alternative Drilling Technologies ............................................................................................................................. 151
5.4 Alternative Resources ............................................................................................................................................. 151
5.5 Alternative Treatment Options ................................................................................................................................ 151
CHAPTER 6: RISK ANALYSIS AND DISASTER MANANGEMENT PLAN .................................................... 154
6.1 Introduction........................................................................................................................................................... 154
6.2 Hazard Identification ............................................................................................................................................ 154
6.2.1 Minor Oil Spill ....................................................................................................................................................... 155
6.2.2 Blowout ................................................................................................................................................................. 156
6.2.3 Other Hazards during Drilling Rig Operations .................................................................................................... 158
6.2.3.1 Setting Up the Substructure ............................................................................................................................ 158
6.2.3.2 Hazards during Setting Up the Rig Floor and Mast or Derrick ...................................................................... 159
6.2.3.3 Hazard in Rigging Up the Circulating System ................................................................................................ 160
6.2.3.4 Hazards during Installing the Auxiliary Equipment ....................................................................................... 160
6.3 Consequence Analysis ......................................................................................................................................... 160
6.3.1 Model Used For Consequence Analysis ............................................................................................................. 162
6.3.2 Scenarios wise Findings of Consequence Analysis .......................................................................................... 162
6.4 Failure Frequency ................................................................................................................................................. 165
6.4.1 Blowout and Well Release Frequencies .............................................................................................................. 165
6.4.2 Structural Failure Frequency ............................................................................................................................... 166
6.5 Risk Mitigation Measures ..................................................................................................................................... 166
6.5.1 Risk Mitigation to Control Hazards ...................................................................................................................... 166
6.5.2 Blowout ................................................................................................................................................................. 166
6.5.3 Control Measures for HS During Drilling ........................................................................................................... 169
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6.5.4 Safety System for Drilling Rigs ............................................................................................................................ 170
6.5.5 Ensure Availability and Provisions before Spudding of the well....................................................................... 171
6.5.6 General Safe Practices during Drilling Operation .............................................................................................. 172
6.5.7 Emergency Preparedness .................................................................................................................................... 172
6.5.8 Fire Fighting Facility for Drilling Rig ................................................................................................................... 172
6.5.9 Control of Hydrocarbon release and Subsequently Fire & Explosion during drilling and testing .................. 172
6.5.10 Medical Facilities ............................................................................................................................................. 174
6.6 Disaster Management Plan .................................................................................................................................. 174
6.6.1 Introduction........................................................................................................................................................... 174
6.6.2 Legal Requirements for Disaster Planning ......................................................................................................... 174
6.6.3 Objectives of the Plan .......................................................................................................................................... 175
6.6.4 Emergency Classification .................................................................................................................................... 177
6.6.4.1 Level 1 Emergency .......................................................................................................................................... 177
6.6.4.2 Level 2 Emergency .......................................................................................................................................... 177
6.6.4.3 Level 3 Emergency .......................................................................................................................................... 177
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ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

6.6.4.4 Level 4 Emergency .......................................................................................................................................... 178
6.6.5 On-Site Disaster Management Plan ..................................................................................................................... 178
6.6.5.1 On-Site Disaster Management Plan ................................................................................................................ 178
6.6.5.2 Emergency Organization ................................................................................................................................. 178
6.6.5.3 Emergency Control Room ............................................................................................................................... 181
6.6.5.4 Organization during Emergency ..................................................................................................................... 182
6.7 Contingency Plan to Prevent Blow-out ............................................................................................................... 185
6.8 Contingency Plan to Prevent Terrorist Attack .................................................................................................... 188
6.9 First Aid Facilities ................................................................................................................................................. 189
6.9.1 Specific Safety Provisions for the Safe First Aid Procedures ........................................................................... 189
6.9.2 Administration of Artificial Respiration ............................................................................................................... 190
6.9.3 Electric Shock ....................................................................................................................................................... 190
6.10 Contact Phone Numbers in Case of Emergency ................................................................................................ 191
CHAPTER 7: ENVIRONMENTAL MANAGEMENT & MONITORING PLAN ................................................... 197
7.1 Preamble ............................................................................................................................................................... 197
7.2 Good Neighbour Practices ................................................................................................................................... 197
7.3 Environment Management Measures (EMM) ...................................................................................................... 201
7.4 Environment Monitoring Program (EMP) ............................................................................................................ 201
7.4.1 Role of ONGC ........................................................................................................................................................ 202
7.4.2 Role of Contractor ................................................................................................................................................ 202
7.5 Spill Management ................................................................................................................................................. 212
7.6 Waste Management Programme .......................................................................................................................... 213
7.7 Audit ...................................................................................................................................................................... 219
7.7.1 Performance Monitoring ...................................................................................................................................... 220
7.8 Environment Management Cell (EMC) ................................................................................................................. 222
7.9 Training ................................................................................................................................................................. 225
7.10 Record Keeping .................................................................................................................................................... 226
7.11 Cost of EMMP ....................................................................................................................................................... 226
CHAPTER 8: PROJECT BENEFITS ................................................................................................................ 228
8.1 Preamble ............................................................................................................................................................... 228
CHAPTER 9: SUMMARY AND CONCLUSIONS ............................................................................................. 230
9.1 Salient Features of the Project ............................................................................................................................ 230
9.2 Salient Features of the baseline .......................................................................................................................... 231
9.3 Salient Features of the impact and mitigation measures ................................................................................... 233
9.4 Cost of EMMP ....................................................................................................................................................... 236
CHAPTER 10: DISCLOSURE OF CONSULTANTS ........................................................................................ 238
ANNEXURE 1: VILLAGE WISE DEMOGRAPHIC PROFILE OF THE BLOCK AREA .................................... 245
ANNEXURE 2: EMPLOYMENT PATTERN IN THE BLOCK AREA ................................................................ 257
ANNEXURE 3: VILLAGE WISE DEMOGRAPHIC PROFILE OF THE STUDY AREA .................................... 271
ANNEXURE 4: VILLAGE WISE INFRASTRUCTURE RESOURCE BASE IN THE STUDY AREA ................ 274
ANNEXURE 5: EMPLOYMENT PATTERN IN THE STUDY AREA ................................................................. 284
ANNEXURE 6: DECLARATION REGARDING LITIGATION ........................................................................... 286

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ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

ABBREVIATIONS
APHA : American Public Health Association
ASTM : American Society for Testing and Materials
AWWA : American Water Works Association
bbl : Billion Barrels
BDL : Below Detection Level
BOD : Biological Oxygen Demand
BTEX : Benzene Toluene Ethylene Xylene
CAGR : Compound Annual Growth Rate
CCoE : Chief Controller of Explosives
CF : Contamination Factor
CI : Corrosion Inhibitor
COD : Chemical Oxygen Demand
CPCB : Central Pollution Control Board
CRZ : Coastal Regulation Zone
DGH : Directorate General of Hydrocarbons
DO : Dissolved Oxygen
DTS : Distributed Temperature System
EC : Electrical Conductivity
ECP : External Casing Packers
EIA : Environmental Impact Assessment
EMMP : Environmental Monitoring and Management Plan
GPS : Geographical Positioning System
HAZOP : Hazard Operability
HC : Hydrocarbons
HDPE : High Density Poly Ethylene
HSE : Health Safety & Environment
IPSEM : Institute of Petroleum Safety and Environment Management
ISRS : International Safety Rating System
MMSCMD : Metric Standard Cubic Meters per Day
MOEF&CC : Ministry of Environment, Forests & Climate Change
MSDS : Material Safety Data Sheet
NABET : National Accreditation Board of Education and Training
ND : Not Detected
NELP : New Exploration Licensing Policy
OHSMS : Occupational Health & Safety Management System
PAH : Polycyclic Aromatic Hydrocarbon
PEL : Petroleum Exploration License
PFP : Flare Platform
PHC : Petroleum Hydrocarbon Content
PPE : Personal Protective Equipment
PVC : Polyvinyl Chlroide
QCI : Quality Council of India
APCB : Assam Pollution Control Board
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ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

SS : Suspended Solids
TDS : Total Dissolved Solids
TOR : Terms of Reference
TPH : Total Petroleum Hydrocarbon
TSS : Total Suspended Solids
USEPA : United States Environmental Protection Agency

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ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

LIST OF TABLES
TABLE 1.1: COORDINATES OF THE BLOCKS
TABLE 1.2: TERMS OF REFERENCE (TOR) COMPLIANCE
TABLE 2.1: PRODUCTION PROFILE OF PROPOSED WELL
TABLE 2.2: DETAILS OF THE DRILLING RIG
TABLE 2.3: CHEMICAL LIST FOR KCL-PHPA POLYMER MUD SYSTEM
TABLE 2.4: FUNCTIONS OF SPECIAL ADDITIVES IN WBM
TABLE 2.5: LIQUID WASTES GENERATED DURING DRILLING AND DISPOSAL
TABLE 2.6: HAZARDOUS WASTE DETAILS PER WELL
TABLE 2.7: NON HAZARDOUS WASTE DETAILS AND DISPOSAL METHODS
TABLE 3.1: ENVIRONMENTAL SETTING OF THE STUDY AREA (10 KM RADIUS)
TABLE 3.2: GROUNDWATER LEVEL MEASURED AT STUDY AREA DURING THE PRIMARY
SURVEY
TABLE 3.3: LAND USE CLASSIFICATION OF THE BLOCK AREA
TABLE 3.4: CLIMATOLOGICAL SUMMARY AT IMD SILCHAR (1954 – 1975)
TABLE 3.5: SUMMARY OF MICRO-METEOROLOGICAL DATA (FROM 1ST JANUARY 2015
TO 30TH APRIL 2015)
TABLE 3.6: AMBIENT AIR QUALITY MONITORING STATION LOCATIONS
TABLE 3.7: AMBIENT QUALITY STANDARDS
TABLE 3.8: PROCEDURE FOR DETERMINING VARIOUS AIR QUALITY PARAMETERS
TABLE 3.9: AMBIENT AIR QUALITY RESULT AT SITES
TABLE 3.10: DETAILS OF NOISE MONITORING LOCATIONS
TABLE 3.11: AMBIENT NOISE LEVEL STANDARDS
TABLE 3.12: AMBIENT NOISE LEVELS
TABLE 3.13: DETAILS OF WATER SAMPLING LOCATIONS
TABLE 3.14: GROUND WATER QUALITY AT STUDY AREA
TABLE 3.15: SURFACE WATER QUALITY AT STUDY AREA
TABLE 3.16: LOCATION DETAILS OF SOIL SAMPLING
TABLE 3.17: STANDARD CLASSIFICATION OF SOIL
TABLE 3.18: RESULTS OF SOIL SAMPLE ANALYSIS
TABLE 3.19: DISTRICT WISE GEOGRAPHICAL AND FOREST AREA OF CACHAR, ASSAM
TABLE 3.20: FLORISTIC DIVERSITY IN THE STUDY AREA
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ENVIRONMENTAL IMPACT ASSESSMENT FOR PROPOSED
DEVELOPMENT DRILLING OF ONE WELL (BKDB-A) IN BANASKANDI
PML BLOCK OF CACHAR, A&AA BASIN, ASSAM

TABLE 3.21: FAUNA RECORDED FROM THE PRIMARY SURVEY IN THE STUDY AREA AND
THEIR CONSERVATION STATUS
TABLE 3.22: CHARACTERIZATION OF FAUNA IN THE STUDY AREA (AS PER W.P ACT,
1972)
TABLE 3.23: LIST OF MACROPHYTES RECORDED WITHIN THE STUDY AREA
TABLE 3.24: LIST OF FISH SPECIES RECORDED WITHIN THE STUDY AREA
TABLE 3.25: SUMMARY OF STUDY AREA VILLAGES AT A GLANCE
TABLE 3.26: DEMOGRAPHIC PROFILE OF THE STUDY AREA AT A GLANCE
TABLE 3.27: EMPLOYMENT PATTERN IN THE STUDY AREA
TABLE 4.1: IMPACT RATING ASSESSMENT
TABLE 4.2: IMPACT RATING ASSESSMENT MATRIX
TABLE 4.3: ENVIRONMENTAL IMPACTS FROM DEVELOPMENT DRILLING OPERATION
TABLE 4.4: SOURCE AND EMISSION CHARACTERISTICS FOR DISPERSION MODELING
TABLE 4.5: OVERALL IMPACT ON EXISTING AMBIENT AIR QUALITY
TABLE 4.6: GENERAL NOISE LEVELS OF SOURCES
TABLE 4.7 PREDICTED ATTENUATED NOISE LEVELS WITH DISTANCE
TABLE 4.8: BACKGROUND AMBIENT NOISE LEVELS WITH DISTANCE
TABLE 4.9: EVALUATION OF IMPACT PREDICTION
TABLE 4.10: IMPACT ASSESSMENT SCORE
TABLE 4.11: IMPACT ASSESSMENT CRITERION
TABLE 4.12: IMPACT EVALUATIONS – DEVELOPMENT DRILLING/TESTING
TABLE 6.1: CLASSIFICATION OF OIL SPILL DURING DEVELOPMENTAL DRILLING
TABLE 6.2: OGP BLOWOUT AND WELL RELEASE FREQUENCIES
TABLE 6.3: DETAILS OF FIRE FIGHTING EQUIPMENTS
TABLE 6.4: FUNCTIONS AND RESPONSIBILITIES
TABLE 7.1: ENVIRONMENT MANAGEMENT PLAN DURING DEVELOPMENTAL DRILLING OF
WELL
TABLE 7.2: ENVIRONMENT MONITORING PLAN DURING DEVELOPMENTAL DRILLING

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