CAJ | 학술논문

延川南煤层气区块位于鄂尔多斯盆地东缘南部，目前已进入开发阶段。相对于常规油气井，煤层气井单井产量较低，开发过程中只有实施低成本战略才能取得较好的经济效益。针对地层特点，对钻井井型、井身结构、钻井工艺、钻井液体系、装备配套等工艺技术进行了探讨，提出了在开展井身结构优化、普通钻机配套空气潜孔锤钻井先导试验的基础上，钻井井型方面以丛式井为主、钻井工艺方面以空气旋冲钻井工艺技术为主、钻井液体系方面以低成本水基钻井液为主、钻机选型方面以采用车载全液压钻机和2000 m钻机为主等低成本钻井方案。
연천남매층기구괴위우악이다사분지동연남부，목전이진입개발계단。상대우상규유기정，매층기정단정산량교저，개발과정중지유실시저성본전략재능취득교호적경제효익。침대지층특점，대찬정정형、정신결구、찬정공예、찬정액체계、장비배투등공예기술진행료탐토，제출료재개전정신결구우화、보통찬궤배투공기잠공추찬정선도시험적기출상，찬정정형방면이총식정위주、찬정공예방면이공기선충찬정공예기술위주、찬정액체계방면이저성본수기찬정액위주、찬궤선형방면이채용차재전액압찬궤화2000 m찬궤위주등저성본찬정방안。
South Yanchuan CBM block lies in the eastern fringe of Ordos basin and is in the development phase at present. Rela-tive to the conventional oil gas well, the product of CBM single well is low. Only by putting a lowcost strategy into practice can eco-nomic benefit be better achieved in the development process. In view of the formation characteristics, this paper carries out a dis-cussion on the well type, well structure, drilling technology, drilling fluid systems and matching equipment. Based on the well struc-ture optimization and the pilot program of ordinary drilling rig with DTH hammer, this paper also brings forward a low cost drilling proposal which advices us to mainly adopt the cluster well, mainly use the lowcost water-based drilling fluid, and mainly choose the vehicle mounted full hydraulic drilling rig and 2 000 m rig.