轮西地区奥陶系地应力方向及裂缝展布规律分析  

Ground stress direction and fracture distribution law of Ordovician in Lunxi area

作　　者：赵军[1] 王淼[1] 祁兴中[2] 傅海成[2] 

机构地区：[1]西南石油大学资源与环境学院 [2]中国石油塔里木油田分公司研究院

出　　处：《岩性油气藏》2010年第3期95-99,共5页Lithologic Reservoirs

基　　金：国家"十五"重点科技攻关项目(编号:2004BA616A02)"塔里木盆地大中型油气田勘探开发关键技术研究"资助;四川省重点学科建设项目(编号:ZXK-JS-2009025-016)"地球探测与信息技术"资助

摘　　要：裂缝展布方位的研究一直是裂缝性油气藏开发工程的重要环节之一,它直接关系到油气藏井网部署的正确与否。而裂缝方向的展布与应力场的分布密切相关,利用地层倾角及成像测井资料,通过井眼应力分析及井眼崩落机理,分析了轮西地区奥陶系碳酸盐岩地层应力的方向,并根据得到的最大、最小水平主应力方位,推断出研究区构造裂缝的分布为北东—南西向,表现为现今地应力方向与有效裂缝方向一致或者小角度斜交。The research of fracture distribution direction is an important element for the development of fractured reservoirs,and it is directly related to well network deployment of reservoirs.The distribution of fracture direction is closely related to the stress field.By using of dipmeter and imaging logging data as well as the borehole stress analysis and borehole caving mechanism,the direction of ground stress of Ordovician carbonate rocks in Lunxi area is analyzed,and it is inferred that the distribution direction of structural fractures is NE-SW in the study area.It is manifested that the direction of present-day ground stress and the effective fracture are the same direction or a slight angle oblique crossing.

关 键 词：地应力 裂缝方向 碳酸盐岩 奥陶系 成像测井 

分 类 号：P315.727[天文地球—地震学]