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Abstract

Abstract

Production from coalbed methane (CBM) reservoirs can often be challenging, particularly related to the dewatering process. Improper positioning and completion of wells can lead to increased complications during the production phase. Additionally, consistently high water levels (undeclined static reservoir pressure) can impede gas production. This paper describes well and production information from the Raniganj coal block.

The pad completion discussed has a mother vertical well (V-well) in which three main coal seams were completed (of the total five main seams with interspersed local seams), and dewatering commenced in 2009. At the end of 2011, encircling the V-well, four deviated wells (D-wells) at different azimuths were positioned at horizontal closures of 263 to 364 m from the bottom seam of the V-Well, wherein five main coal seams, along with interspersed local seams, were completed and scheduled for dewatering in mid-2012. Despite consistent high water production rates from the V-Well, the water levels in the V-Well stood consistently higher (rising upward) than the water levels in the D-wells, unlike nearby V and D-well pads. Well spacing information, well stimulation plots, perforation plans, and overlying strata for all five wells on this pad were studied and conclusions were drawn. This paper discusses such conclusions as well as the analyses performed to understand these issues. An attempt has also been made to best optimize hydraulic fracturing (HF) treatment designs to obtain the maximum benefits from stimulation operations.

The results reported in this paper will influence the operator’s cost optimization, which could be a major positive influence on the low-cost CBM market in addition to increasing efficiency of the entire operation.

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2014-02-25
2024-03-29
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References

  1. Adil, F., Sharma, A., and Bhat, S.
    2012. Hydraulic Fracturing of CBM Wells in India Using a Unique Fracturing-Service Technology-Operational and Technological Lessons. Paper SPE 153144 presented at SPE Middle East Unconventional Gas Conference and Exhibition, Abu Dhabi, UAE, 23–25 January. http://dx.doi.org/10.2118/153144-MS.
    [Google Scholar]
  2. Aguilera, R.
    1987. Effect of Wellbore Storage, Skin, and Outer Reservoir Boundaries on the Transient Behavior of Naturally Fractured Reservoirs with Vertical Hydraulic Fractures. Paper SPE 17023 available from the SPE eLibrary.
    [Google Scholar]
  3. Ayoub, J., Hinkel, J., Johnston, D., and Levine, J.
    1991. Learning to Product Coalbed Methane. Oilfield Review3 (1): 27–40.
    [Google Scholar]
  4. Cipolla, C. L., Warpinski, N.R., Mayerhofer, M.J., Lolon, E.P, and Vincent, M.C.
    2010. The Relationship Between Fracture Complexity, Reservoir Properties, and Fracture-Treatment Design: 438–452. SPE-115769. http://dx.doi.org/10.2118/115769-PA.
    [Google Scholar]
  5. Colmenares, L.B. and Zoback, M.D.
    2007. Hydraulic Fracturing and Wellbore Completion of Coalbed Methane Wells in the Powder River Basin, Wyoming: Implications for Water and Gas Production. AAPG Bull.91 (1): 51–67. http://dx.doi.org/10.1306/07180605154.
    [Google Scholar]
  6. EconomidesmM. HillD., and Ehlig-EconomidesC.E.
    1993. Petroleum Production Systems. Upper Saddle River, New Jersey. Textbook series.
    [Google Scholar]
  7. Ghosh, S.C.
    2002. The Raniganj Coal Basin: An Example of An Indian Gondwana Rift. Sedimentary Geology147 (1–2): 155–176.
    [Google Scholar]
  8. Ilk, D., Rushing, J.A., and Sullivan, R.B.
    2007. Evaluating the Impact of Waterfrac Technologies on Gas Recovery Efficiency: Case Studies Using Elliptical Flow Production Data Analysis. Paper 110187-MS presented at the SPE Annual Technical Conference and Exhibition, Anaheim, California, USA, 11–14 November. http://dx.doi.org/10.2118/110187-MS.
    [Google Scholar]
  9. McDaniel, B.W., Surjaatmadja, J.B., and East, L.E.
    2008. Hydrajet (Abrasive) Perforating Can Improve Success of Fracturing Stimulations. Paper SPE 12043 presented at the International Petroleum Technology Conference, Kuala Lumpur, Malaysia, 3–5 December. http://dx.doi.org/10.2523/12043-MS.
    [Google Scholar]
  10. Palmer, I. and Cameron, J.
    2003. Coalbed Methane Completions: Update on Recent Practices. Paper presented at the Coalbed Methane Symposium, Calgary, Canada, 7–9 April.
    [Google Scholar]
  11. Palmer, I., Vaziri, H., Khodaverdian, M., McLennan, J., Prasad, K. V. K., Edwards, P., Brackin, C., Kutas, M., and Fincher, R.
    1995a. Completions and Stimulations for Coalbed Methane Wells. Paper SPE 30012 presented at the International Meeting on Petroleum Engineering, Beijing, China, 14–17 November. http://dx.doi.org/10.2118/30012-MS.10.2118/96872-MS.
    [Google Scholar]
  12. PalmerI., Moschovidis, Z., and Cameron, J.
    2005b. Coal Failure and Consequences for Coalbed Methane Wells. Paper SPE 96872 presented at the SPE Annual Technical Conference and Exhibition, Dallas, Texas, USA, 9–12.
    [Google Scholar]
  13. Ramurthy, M., Marjerisson, D.M., and Daves, S.B.
    2002. Diagnostic Fracture Injection Test in Coals to Determine Pore Pressure and Permeability. Paper 75701 presented at the SPE Gas Technology Symposium, Calgary, Alberta, Canada, 30 April–2 May. http://dx.doi.org/10.2118/75701-MS.
    [Google Scholar]
  14. Sahai, V., Jackson, G., and Rai, R.
    2013. Effect of Non-uniform Fracture Spacing and Fracture Half-length on Well Spacing for Unconventional Gas Reservoirs. Paper SPE 164927 presented at the 75th EAGE Conference and Exhibition, London, United Kingdom, 10–13 June. http://dx.doi.org/10.2118/164927-MS.
    [Google Scholar]
  15. Tokunaga, H. and Hise, B.R.
    1966. A Method to Determine Optimum Well Spacing. Paper SPE 1673 presented at the SPE California Regional Meeting, Santa Barbara, California, USA, 17–18 November. http://dx.doi.org/10.2118/1673-MS.
    [Google Scholar]
  16. Terzaghi, K V.
    1955. Evaluation of Coefficient of Subgrade Reaction,. Geotechnique5 (4): 297–326.
    [Google Scholar]
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