地应力方向研究新方法———磁组构法

A New Stress Orientation Research Method :MagneticFabric

朱德武

Zhu Dewu

中国石油化工股份有限公司石油勘探开发研究院德州石油钻井研究所

Dezhou Petroleum Drilling Research Institute , SINOPEC, Shandong 253005 , P. R. China

为了确定张天渠油田储层裂缝发展方向,为注水井网布置及开发调整提供依据,进行了磁组构法研究地应力方向的首次尝试。阐述了用磁组构学中磁化率椭球与地应力的关系研究地应力方向的原理及试验测试方法。进行了磁组构法结合古地磁确定地应力方向研究,并与差应变法(DSA) 结合古地磁确定地应力方向的研究结果、用声发射分析定位系统矿场测试地应力方向的结果、注采井生产响应情况以及鄂尔多斯盆地地应力分布规律进行对比,表明磁组构法试验测试简便,节省费用,结果可靠,可广泛用于油田地应力及裂缝方向研究。

Studies on stress orientation and natural fractures have been launchd for water flooding wells placement and adjustment at Zhangtianqu Oilfield , and Magnetic Fabric method for stress orientation determination has been introduced for the first time in petroleum production. In this paper , the principle of stress orientation researches through the relations between stress and magnetic susceptical ellipsoid in Magnetic Fabric is given as well as testing way ,and comparisons with conventional methods such as DSA ,paleomagnatism etc. ,are also made through cases. The results prove magnetic fabric method is simple ,reliable and costeffective , and can be widely applied in stress and fracture researches.