1887
Volume 55, Issue 2
  • ISSN: 0812-3985
  • E-ISSN: 1834-7533

Abstract

Present study aims to locate potential reservoir zones in the Paleocene, Eocene and Oligocene sequences by analysing well log data of nine vertical wells in the exploration block MB-OSN-2004/1 in the Bombay offshore basin, Gulf of Cambay, India. The geophysical logs such as gamma-ray (GR), caliper (Cali), resistivity (LLD, LLS, and MSFL), photoelectric effect (PEE), neutron porosity (NPHI), and density (RHOB) are used to study the petrophysical characteristics of the identified reservoirs in this field. The relevant information from other sources like available report, mud log, and other open hole wireline log data, and local knowledge about the field are integrated with the petrophysical analysis. The cross-plots and mud log data show that the wells mainly consist of three types of lithology: shaly-sand, shale, and limestone, however, coal layers and pyrite are present at some places. Cross plots of thorium and potassium (from spectral gamma-ray log) show that the type of clay is mixed-layers of illite, montmorillonite and kaolinite in the Pipavav and Panna formations. Three of the nine drilled wells C-47-1, MTC-1, and MB-3-1 are identified by the petrophysical investigation as gas-bearing, principally in the Pipavav and Panna formations, with saturation ranging from 55% to 60% and porosity varying from 10% to 40%. Gas-bearing layers’ thickness varies from 5 to 40 m and are primarily composed of clastic sediment with mixed carbonates in some locations. The remaining wells are water-bearing because the wells penetrating the silt formations are abundant in clay minerals, which keep the reservoir from releasing fluid and decrease its permeability. In addition, gas cannot rise because impervious shale layers are present in the columns of sand and calcareous sand.

© 2023 Australian Society of Exploration Geophysicists
Loading

Article metrics loading...

/content/journals/10.1080/08123985.2023.2288958
2024-03-03
2026-01-12

  • From This Site

    /content/journals/10.1080/08123985.2023.2288958
    dcterms_title,dcterms_subject,pub_keyword
    -contentType:Journal -contentType:Contributor -contentType:Concept -contentType:Institution
    10
    5
Loading full text...

Full text loading...

References

  1. Alberty, M.W.1994. Standard interpretation; Part 4—wireline methods. In Development geology reference manual. AAPG Methods in Exploration Series 10, eds. D.Morton-Thompson, and A.M.Woods, 180–185. American Association of Petroleum Geologists.
     [Google Scholar]
  2. Archie, G.E.1942. The electrical resistivity log as an aid in determining some reservoir characteristics. Transactions of the AIME146, no. 1: 54–62. https://doi.org/10.2118/942054‑G.
     https://doi.org/https://doi.org/10.2118/942054-G [Google Scholar]
  3. Avanzini, A., P.Balossino, M.Brignoli, E.Spelta, and C.Tarchiani. 2016. Lithologic and geomechanical facies classification for sweet spot identification in gas shale reservoir. Interpretation4, no. 3: SL21–SL31.
     [Google Scholar]
  4. Baouche, R., and B.S.Nabawy. 2021. Permeability prediction in argillaceous sandstone reservoirs using fuzzy logic analysis: A case study of triassic sequences, Southern Hassi R'Mel Gas Field, Algeria. Journal of African Earth Sciences173: 104049.
     [Google Scholar]
  5. Biswas, S.K.1982. Rift basins in Western margin of India and their hydrocarbon prospects with special reference to Kutch Basin. American Association of Petroleum Geologists66: 1497–1513.
     [Google Scholar]
  6. Biswas, S.K.1987. Regional tectonic framework, structure and evolution of the western marginal basins of India. Tectonophysics135: 307–327.
     [Google Scholar]
  7. Clarkson, C.R., J.L.Jensen, and S.Chipperfield. 2012. Unconventional gas reservoir evaluation: What do we have to consider?Journal of Natural Gas Science and Engineering8: 9–33.
     [Google Scholar]
  8. EI-Khadragy, A.A., M.A.Ghorab, T.F.Shazly, M.Ramadan, and M.Z.EI-Sawy. 2014. Using of pickett’s plot in determining the reservoir characteristics in Abu Roash formation, El-razzak Oil field, North Western Desert, Egypt. Egyptian Journal of Petroleum23: 45–51.
     [Google Scholar]
  9. Goswami, B.G., H.Singh, A.K.Bhatnagar, A.K.Sinha, and R.R.Singh. 2007. Petroleum Systems of the Mumbai offshore basin, India. AAPG Annual Convention, April 1–4, Long Beach, CA.
     [Google Scholar]
  10. Iqbal, O., M.Ahmad, and A.Kadir. 2018. Effective evaluation of shale gas reservoirs by means of an integrated approach to petrophysics and geomechanics for the optimization of hydraulic fracturing: A case study of the Permian Roseneath and Murteree Shale Gas reservoirs, Cooper Basin, Australia. Journal of Natural Gas Science and Engineering58: 34–58.
     [Google Scholar]
  11. Kumar, P., R.B.N.Singh, Shalini, and B.S. Bisht. 2017. Regional level interpretation model for petro-physical evaluation of mid-Eocene complex lithology, shaly/silty sandstone reservoirs of north Cambay basin, India. Geohorizons SPG, India.
  12. Lai, J., G.Wang, Q.Fan, X.Pang, H.Li, F.Zhao, Y.Li, et al.2022. Geophysical well-Log evaluation in the Era of unconventional hydrocarbon resources: A review on current status and prospects. Surveys in Geophysics43: 913–957. https://doi.org/10.1007/s10712‑022‑09705‑4.
     https://doi.org/https://doi.org/10.1007/s10712-022-09705-4 [Google Scholar]
  13. Mondal, S.R., R.Ghosh, M.Ojha, and S.Maiti. 2022. Predicting resource potential of hydrocarbon in the Gulf of Cambay, west coast of India by integrating rock physics and multi-attribute linear regression transform. Natural Resources Research31: 643–661. https://doi.org/10.1007/s11053‑021‑09999‑y.
     https://doi.org/https://doi.org/10.1007/s11053-021-09999-y [Google Scholar]
  14. Nayak, S.R., and B.Sahai. 1985. Coastal morphology: A case study of the Gulf of Khambhat (Cambay). International Journal of Remote Sensing6, no. 3-4: 559–567.
     [Google Scholar]
  15. Poupon, A., and J.Leveaux. 1971. Evaluation of water saturation in shaly formations. The Log Analyst12: 1–2.
     [Google Scholar]
  16. Prasad, J., A.K.Jena, N.K.Uppal, M.Kumari, G.C.Saha, and A.Samanta. 2011. Characterization of Mukta & Bassein pay carbonates reservoirs using a synergistic approach – a case study of a Brown Field of Mumbai offshore basin, India. SPWLA-India 3rd Annual Logging Symposium, Mumbai, India.
     [Google Scholar]
  17. Radwan, A.A., M.A.Abdelwahhab, B.S.Nabawy, K.H.Mahfouz, and M.S.Ahmed. 2022. Facies analysis-constrained geophysical 3D-static reservoir modeling of Cenomanian units in the Aghar Oilfield (Western Desert, Egypt): Insights into paleoenvironment and petroleum geology of fluviomarine systems. Marine and Petroleum Geology136: 105436.
     [Google Scholar]
  18. Radwan, A.A., B.S.Nabawy, A.Abdelmaksoud, and A.Lashin. 2021. Integrated sedimentological and petrophysical characterization for clastic reservoirs: A case study from New Zealand. Journal of Natural Gas Science and Engineering88: 103797.
     [Google Scholar]
  19. Radwan, A.A., B.S.Nabawy, M.Shihata, and M.Leila. 2022. Seismic interpretation, reservoir characterization, gas origin and entrapment of the miocene-pliocene mangaa C sandstone, Karewa Gas field, North Taranaki Basin, New Zealand. Marine and Petroleum Geology135: 105420.
     [Google Scholar]
  20. Saha, S., S.D.Burley, S.Gowland, A.Thurlow, and A.Tayler. 2009. The stratigraphic and sedimentological evolution of the Mahim, Daman and Mahuva formation reservoirs of the Tapti fields: Tidally-Influenced deposition in an oligo-miocene tropical estuarine embayment on the continental shelf of western India. AAPG, HEBERG conference, Jakarta, Indonesia.
     [Google Scholar]
  21. Schlumberger. 1972. Log interpretation manual/principles. Houston: Schlumberger Well Services.
  22. Schlumberger. 1989. Log interpretation principles and applications. Houston: Schlumberger Well Services.
  23. Swager, L.2016. ELAN petrophysical analysis report. Schlumberger.
  24. Unpublished Report. 2010. 3D seismic data interpretation services for mb-osn-2004/1 offshore exploration block, west coast of India. Prepared and Submitted by Halliburton Offshore Services Inc.
  25. Wandrey, C.J.2004. Bombay geologic province eocene to miocene composite total petroleum system, India. USGS Bulletin 2208-F:19.
/content/journals/10.1080/08123985.2023.2288958
Loading
Well log evaluation of the gas-bearing reservoirs in the Bombay offshore basin, Gulf of Cambay, western coast of India
Exploration Geophysics 55, 191 (2024); https://doi.org/10.1080/08123985.2023.2288958
/content/journals/10.1080/08123985.2023.2288958
/content/journals/10.1080/08123985.2023.2288958
Loading

Data & Media loading...

  • Article Type: Case Report
Keyword(s): gas-bearing reservoir; Gulf of Cambay; hydrocarbon exploration; petrophysical analysis; Well log analysis

Most Cited This Month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error