元坝陆相水平井井身结构优化研究  

Casing- program Optimization for Continental Horizontal Wells, Yuanba Area

作　　者：李莎莎[1] 吴建忠[1] 胡大梁[2] 

机构地区：[1]中国石化西南油气分公司,四川成都610041 [2]中国石化西南油气分公司工程技术研究院,四川德阳618000

出　　处：《天然气技术与经济》2015年第3期41-44,78-79,共4页Natural Gas Technology and Economy

摘　　要：元坝陆相地区钻井工程存在地质条件复杂、施工难度大、不确定因素多、井控风险高等难点,如何优化复杂地质条件下水平井井身结构是目前元坝陆相钻井工程所面临的突出问题。在分析元坝陆相地质特征与钻井难点的基础上,结合前期水平井实钻井身结构,明确了制约陆相水平井井身结构优化的关键问题,有针对性地采取"由内到外"和"由下而上"相结合的井身结构设计方法,形成了?139.7 mm套管射孔完井和?152.4 mm裸眼完井的井身结构方案,并指导了3口水平井井身结构设计,现场应用情况良好,复杂事故时效降低到0.55%,机械钻速和生产时效分别提高了113.95%和6.86%。In Yuanba continental areas with complicated geological conditions, some problems occur in drilling engineering,such as, great difficulties, various uncertainties, and high risk of well control. Therefore, how to optimize the casing program of a horizontal well with complicated geological conditions is very critical.Based on both the analysis on geological features and drilling diffi-culties and the real casing program of horizontal well, the key problem which may restrict the optimization has been found. Through a casing-program design of'inside-out'and'bottom-up', a method including Ф139.7 mm of casing perforation completion and Ф152.4 mm of openhole completion formed, and was applied to 3 horizontal wells. Better application effect was obtained, the complicated accident rate reduced to 0.55 %, and the penetration rate and production efficiency increased by 113.95 % and 6.86 %, respectively.

关 键 词：元坝陆相 水平井 井身结构优化 完井方式 多压力层系 

分 类 号：TE243[石油与天然气工程—油气井工程]