“井工厂”模式在大牛地气田的探索与应用

Exploration and application of “Well Plant” mode in Daniudi Gas Field

王锦昌 邓红琳 袁立鹤 王翔

WANG Jinchang DENG Honglin YUAN Lihe WANG Xiang

中石化华北分公司工程技术研究院，河南郑州　450006

Research Institute of Engineering Technology, Huabei Branch Company, Sinopec, Zhengzhou 450006, China

大牛地气田是典型的低孔、低压、低渗气田，为提高单井产量，缩短单井建井周期，降低单井钻井、储层改造、采油气管理的成本，2012年进行了“井工厂”开发模式的探索与应用。采用地质和工程整体部署的方法开展研究，井组部署在地质预测砂体水平展布面积广、砂体相对较厚的有利区；井组全部由水平井组成，可分为二井式、四井式、六井式，井眼轨道尽量不设计三维轨道；井组实施同步压裂储层改造。现场应用表明，“井工厂”模式水平井单井平均建井周期较常规井缩短20.11%，平均完井周期缩短23.85%，平均机械钻速提高29.08%，井组平均搬迁周期缩短50.46%。2012年“井工厂”模式的应用共节约征地面积381亩，直接节约投资3 303万元，对大牛地气田进一步推广应用“井工厂”模式开发具有借鉴意义。

Daniudi Gas Field is a typical low-porosity, low pressure and low permeability gas filed. To improve the output of single well, shorten the construction period of single well, and reduce the costs of single well drilling, reconstruction of reservoir, and management of oil gas production, the exploration and application of “well plant” development mode was performed in 2012. The research was carried out in the overall deployment method of geology and engineering. The well group is located in favorable areas with wide area of horizontal expansion of sand body and relatively thick sand body in geological prediction. The well group is completely composed of horizontal wells, which can be divided into double-well type, four-well type and six-well type. For the well bore trajectory, three-dimensional trajectory shall not be designed as much as possible. The synchronous reservoir fracturing improvement shall be performed for the well group. The on-site application shows that the average construction period of horizontal single well in “well plant” mode is shortened by 20.11%, the average completion period is reduced by 23.85%, the average rate of penetration is increased by 29.08%; and the average relocation period of well group is shortened by 50.46%. Application of “well plant” mode for 2012 saved the area of acquired land of 381 mu and saved directly the investment of RMB 33.03 million. The development of “well plant” mode further promoted and applied in Daniudi Gas Field can provide guidance and draw on the experience.