A Parametric Study on the Benefits of Drilling Horizontal and Multilateral Wells in Coalbed Methane Reservoirs
- Nikola Maricic (Chevron Corp.) | Shahab D. Mohaghegh (West Virginia University) | Emre Artun (West Virginia University)
- Document ID
- Society of Petroleum Engineers
- SPE Reservoir Evaluation & Engineering
- Publication Date
- December 2008
- Document Type
- Journal Paper
- 976 - 983
- 2008. Society of Petroleum Engineers
- 4.6 Natural Gas, 5.4.2 Gas Injection Methods, 5.8.3 Coal Seam Gas, 5.1 Reservoir Characterisation, 1.6.6 Directional Drilling, 5.5 Reservoir Simulation, 2 Well Completion, 1.6 Drilling Operations
- 11 in the last 30 days
- 1,591 since 2007
- Show more detail
- View rights & permissions
|SPE Member Price:||USD 10.00|
|SPE Non-Member Price:||USD 30.00|
Recent years have witnessed a renewed interest in development of coalbed methane (CBM) reservoirs. Optimizing CBM production is of interest to many operators. Drilling horizontal and multilateral wells is gaining popularity in many different coalbed reservoirs, with varying results. This study concentrates on variations of horizontal- and multilateral-well configurations and their potential benefits.
In this study, horizontal and several multilateral drilling patterns for CBM reservoirs are studied. The reservoir parameters that have been studied include gas content, permeability, and desorption characteristics. Net present value (NPV) has been used as the yard stick for comparing different drilling configurations. Configurations that have been investigated are single-, dual-, tri-, and quadlateral wells along with fishbone (also known as pinnate) wells. In these configurations, the total length of horizontal wells and the spacing between laterals (SBL) have been studied. It was determined that in the cases that have been studied in this paper (all other circumstances being equal), quadlateral wells are the optimum well configuration.
Several studies in the past have examined the impact of different reservoir properties on CBM production (Ertekin et al. 1988; Zuber 1998; Katyal et al. 2007), including the effect of secondary (micro-) permeability (Gamson et al. 1993; Mavor and Gunter 2006; Palmer et al. 2006). This paper is dedicated to examining the impact of different horizontal-well configurations (multilateral) on the production and recovery in CBM reservoirs.
In this section, a brief background on reservoir-engineering aspects of CBM production is presented along with details on the reservoir simulator used for modeling the cases used in this study. Some basic introduction about horizontal wells and their impact on production behavior is also presented.
|File Size||3 MB||Number of Pages||8|
Arenas, A.G. 2004. Development of gas production curves for coalbed methanereservoirs. MS thesis, West Virginia University, Morgantown, West Virginia.
Deimbacher, F.X., Economides, M.J., Heinemann, Z.E., and Brown, J.E. 1992.Comparison of Methane ProductionFrom Coalbeds Using Vertical or Horizontal Fractured Wells. JPT44 (8): 930-935; Trans., AIME, 293. SPE-21280-PA. DOI:10.2118/21280-PA.
Ertekin, T., Sung, W., and Schwerer, F. 1988. Production Performance Analysis ofHorizontal Drainage Wells for the Degasification of Coal Seams. JPT40 (5): 625-632. SPE-15453-PA. DOI: 10.2118/15453-PA.
Gamson, P.D., Beamish, B.B., and Johnson, D.P. 1993. Coal Microstructure andMicropermeability and Their Effects On Natural-Gas Recovery. Fuel72 (1): 87-99. DOI: 10.1016/0016-2361(93)90381-B.
GEM Advanced Compositional Reservoir Simulator, Version 2006 User Guide.2006. Calgary, Alberta: CMG.
Gu, F. and Chalaturnyk, R.J. 2005. Analysis of coalbed methane production byreservoir and geomechanical coupling simulation. J. Cdn. Pet. Tech.44 (10): 33-42.
Guo, X., Du, Z., and Li, S. 2003. Computer Modeling and Simulation ofCoalbed Methane Reservoir. Paper SPE 84815 presented at the SPE EasternRegional Meeting, Pittsburgh, Pennsylvania, USA, 6-10 September. DOI:10.2118/84815-MS.
Katyal, S., Valix, M., Thambimuthu, K. 2007. Study of parameters affectingenhanced coal bed methane. Energy Sources, Part A: Recovery Utilization andEnvironmental Effects 29 (3): 193-205.
Logan, T.L. 1988. HorizontalDrainhole Drilling Techniques Used for Coal Seam Resources Exploitation.Paper SPE 18254 presented at the SPE Annual Technical Conference andExhibition, Houston, 2-5 October. DOI: 10.2118/18254-MS.
Mavor, M.J. and Gunter, W.D. 2006. Secondary Porosity and Permeabilityof Coal vs. Gas Composition and Pressure. SPEREE 9 (2):114-125. SPE-90255-PA. DOI: 10.2118/90255-PA.
Osisanya, S.O. and Schaffitzel, R.F. 1996. A Review of Horizontal Drilling andCompletion Techniques for Recovery of Coalbed Methane. Paper SPE 37131presented at the International Conference on Horizontal Well Technology,Calgary, 18-20 November. DOI: 10.2118/37131-MS.
Palmer, I.D., Cameron, J.R., and Moschovidis, Z.A. 2006. Permeabilitychanges affect CBM production predictions. Oil & Gas Journal104 (28): 43-50.
Remner, D., Ertekin, T., Sung, W., and King, G. 1986. A Parametric Study of the Effects ofCoal Seam Properties on Gas Drainage Efficiency. SPERE 1 (6):633-646. SPE-13366-PA. DOI: 10.2118/13366-PA.
Roadifer, R.D., Moore, T.R., Raterman, K.T., Farnan, R.A., and Crabtree,B.J. 2003. Coalbed MethaneParametric Study: What's Really Important to Production and When? Paper SPE84425 presented at the SPE Annual Technical Conference and Exhibition, Denver,5-8 October. DOI: 10.2118/84425-MS.
Saulsberry, J.L., Schafer, P.S., and Scraufnagel, R.A. ed. 1996. A Guide toCoalbed Methane Reservoir Engineering. Technical Report GRI-94/0397, GasResearch Institute, Chicago, Illinois.
Schraufnagel, R. and McBane, R. 1994. Coalbed Methane--A Decade ofSuccess. Paper SPE 28581 presented at the SPE Annual Technical Conferenceand Exhibition, New Orleans, 25-28 September. DOI: 10.2118/28581-MS.
Shi, J.-Q. and Durucan, S. 2005. A Model for Changes in CoalbedPermeability During Primary and Enhanced Methane Recovery. SPEREE8 (4): 291-299. SPE-87230-PA. DOI: 10.2118/87230-PA.