页岩气双二维水平井极限延伸能力研究  

The Study of Limit Extension Ability of Shale Gas Double 2D Horizontal Well

作　　者：刘茂森[1] 付建红[1] 白璟 

机构地区：[1]油气藏地质及开发工程国家重点实验室.西南石油大学,成都610500 [2]川庆钻探工程公司钻采工程技术研究院,广汉618300

出　　处：《科学技术与工程》2016年第10期29-33,共5页Science Technology and Engineering

基　　金：973项目(2013CB228003)资助

摘　　要：页岩气藏的开发多采用水平井,水平段的延伸能力直接影响到页岩气藏的综合开发效益。双二维水平井具有施工难度小、邻井碰撞风险低、作业费用低等优点。根据长宁页岩气的钻井实际情况,分析了钻机承载能力、钻柱安全系数、地层承压能力及额定泵压等因素对水平井延伸能力的影响,推导了相应计算模型。以长宁已钻页岩气井为基础,计算了不同影响因素随水平段长度的变化。研究表明,双二维水平井的延伸能力主要受地层承压能力和额定泵压影响,钻井施工中应选择合理的钻井液密度和排量,降低水平段岩屑床高度,采取适当的堵漏措施,选择高额定泵压的钻井泵。The shale gas reservoirs are mostly exploited by horizontal well.The extension ability of horizontal section directly affects comprehensive development benefit of shale gas reservoirs.Double 2D horizontal well has advantages such as less construction difficulty,lower risk of adjacent wells,and lower operating costs.Different factors were analyzed including bearing capacity of rig,safety coefficient of drill pipe,loading capacity of formation,rated pump pressure which affected extension ability of horizontal well.It put forward corresponding calculation models and calculated the variation of different factors as the horizontal section changed.The result demonstrated that the extension ability of double 2D horizontal well was mainly influenced by loading capacity of formation and rated pump pressure.In drilling construction,reasonable drilling fluid density and displacement were should choosed,reduced the cuttings bed height,taken appropriate plugging measures,and choosed drilling pump with high rated pump pressure.

关 键 词：页岩气 双二维水平井 延伸能力 摩阻扭矩 循环压耗 

分 类 号：TE243[石油与天然气工程—油气井工程]