Study on the Influence of Deep Coalbed Methane Horizontal Well Deployment Orientation on Production

Ruyong Feng (), Chen Li, Lichun Sun, Jian Wang, Jia Liu and Na Li
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Ruyong Feng: CNOOC Research Institute Ltd., CNOOC Building, Yard 6, Taiyanggong South Street, Chaoyang District, Beijing 100028, China
Chen Li: CNOOC Research Institute Ltd., CNOOC Building, Yard 6, Taiyanggong South Street, Chaoyang District, Beijing 100028, China
Lichun Sun: CNOOC Research Institute Ltd., CNOOC Building, Yard 6, Taiyanggong South Street, Chaoyang District, Beijing 100028, China
Jian Wang: CNOOC Research Institute Ltd., CNOOC Building, Yard 6, Taiyanggong South Street, Chaoyang District, Beijing 100028, China
Jia Liu: CNOOC Research Institute Ltd., CNOOC Building, Yard 6, Taiyanggong South Street, Chaoyang District, Beijing 100028, China
Na Li: CNOOC Research Institute Ltd., CNOOC Building, Yard 6, Taiyanggong South Street, Chaoyang District, Beijing 100028, China

Energies, 2024, vol. 17, issue 22, 1-20

Abstract: The development of deep coalbed methane has become an important way to obtain natural gas in China. The development of deep CBM mainly depends on horizontal well technology. The different orientations of horizontal wells will have an important impact on the productivity of coalbed methane wells. The angle grid geological model of coalbed methane reservoirs with different inclination angles is established, and the deployment orientation of horizontal wells is changed to study the optimal deployment orientation of deep-saturated coalbed methane reservoirs. When CBM horizontal wells in deep saturated CBM reservoirs are deployed upward along the dip, well-controlled reserves, peak daily gas production, and cumulative gas production increase as the dip decreases. When deploying down the dip, with the increase in dip angle, the well-controlled reserves increase, and the peak daily gas production and cumulative gas production first increase and then decrease. In the low-dip reservoir, the development effect of horizontal wells deployed in different directions is better than that in the up-dip direction. In the high-dip reservoir, the development effect of horizontal wells deployed along the strike is better than that in the up-dip and down-dip directions. The development effect of horizontal wells is controlled by both well-controlled reserves and reservoir pressure drop. Because this method is targeted at different geological conditions, it can be used to guide the horizontal well optimization of other coalbed methane blocks and has very important significance for the development and optimization of coalbed methane reservoirs.

Keywords: deep coalbed gas; horizontal well; deployment bearing; production affecting factors (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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