CAJ | 학술논문

﹑煤储层具有低压低渗特征，致使煤层气开发困难，单井产量低；而多分支水平井能显著增加井筒与煤层的接触面积，提高单井产量，缩短经济回收期。为此，提出了煤层气多分支水平井井眼轨道优化设计准则和主水平井方位的选择方法，建立了煤层侧钻水平井井眼轨道优化设计模型，并将该模型用于鄂尔多斯盆地2号和10号煤层的煤层气多分支水平井井眼轨道优化设计。结果表明，该模型实现了以较短的井眼轨道进入目标靶点，保证了分支井眼的平滑度，对煤层气钻井设计具有重要的指导意义。
﹑매저층구유저압저삼특정，치사매층기개발곤난，단정산량저；이다분지수평정능현저증가정통여매층적접촉면적，제고단정산량，축단경제회수기。위차，제출료매층기다분지수평정정안궤도우화설계준칙화주수평정방위적선택방법，건립료매층측찬수평정정안궤도우화설계모형，병장해모형용우악이다사분지2호화10호매층적매층기다분지수평정정안궤도우화설계。결과표명，해모형실현료이교단적정안궤도진입목표파점，보증료분지정안적평활도，대매층기찬정설계구유중요적지도의의。
Coal reservoirs have features of low pressure and low permeability, making exploitation difficult and-well yieldlow. However, multi-branch horizontal well may increase the contact area with the coal, enhance produc-tion and shorten the economic recovery period. Hence well trajectory optimization criterion of coalbed methane (CBM) multi-branch horizontal well is presented in this paper. In addition, authors established a trajectory optimal design model of the sidetrack horizontal well and then used sequential quadratic programming method (SQP). Fi-nally well trajectory is planed by this model based on geological data in Zhengzhuang of Shanxi Province. The re-sults show that the model achieves optimization design of multi-branch horizontal wells of CBM and deserve somewhat consideration for guideline in the process of well design.