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Environmental pollution monitoring in oil exploration and exploitation

  • J. Chand
Chapter

Abstract

Oil & Natural Gas Commission has been exploring and exploiting for hydrocarbons in most diverse geographical locations on onshore & offshore in India As a result of these activities, ONGC is interacting with the environment in various ways In exploration and exploitation of oil & gas, the major environmental pollutants are i) effluent water contaminated with oily effluents eg oil & grease, chemicals and solids from drilling fluid, ii) formation water produced along with crude oil and iii) gaseous emissions having CO, S02, NOx, hydrocarbons, particulate from gasflare.

During drilling operations, the seepage/leakage of effluent water to the surrounding areas is a major source of pollution To check the leakage/seepage of effluent water, a number of control measures are being taken viz.,

  1. i)

    construction of ring bund on the periphery of drill site

     
  2. ii)

    construction of peripheral trench along with boundary wall

     
  3. iii)

    compartmentalisation of drill site

     
  4. iv)

    construction of cutting pit, waste pit, oil pit etc.

     

The water produced along the oil is either evaporated in evaporation pit or treated in effluent treatment plant The flaring of associated gas can cause air pollution and heat & glare produced can adversely effect the nearby fauna & flora To check the air pollution, box flares are being used and to minimise the effect of heat and glare, multipoint flares of low height covered from all around with asbestose/cement sheet along with brick wall are being used.

The left over drill sites are being developed and trees all around the boundary of drill site area being planted to improve the ecological balance, which has been greatly disturbed.

At the offshore drilling rigs & production platforms, facilities exist to treat the sewage, burn the drill waste, treat the effluent water and collection of spilled oil from the unit etc.

Keywords

Drilling Fluid Production Platform Effluent Water Brick Wall Drill Site 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. Bindu N Lohani, Environmental quality managementGoogle Scholar
  2. Robert R Wheeler Maurine (Edited), From prospect to pipelineGoogle Scholar
  3. Purdy, GA, PetroleumGoogle Scholar
  4. Joshi, SC and Battacharya (Edited), Mining & Envoronment in IndiaGoogle Scholar
  5. Diwakar Rao, PL (Edited) Pollution control hand book 1986Google Scholar
  6. Willium J Cairns and Patrick M Rogus Onshore impacts of offshore oil Munn, RE Environmental assessment scope-5Google Scholar
  7. Munn, R.E. Environmental assessment scope-5Google Scholar

Copyright information

© Chapman and Hall 1990

Authors and Affiliations

  • J. Chand
    • 1
  1. 1.ONGCJorhat, AssamIndia

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