摘要
地应力方向即水平主应方向的方位角,在油气田开发过程中扮演着重要的角色。地应力方向可通过岩心分析、测井数据解释、地震数据解释等方法确定。其中岩心分析又有波速各向异性、声发射、差应变分析等不同测定原理。波速各向异性法结合古地磁法是利用非定向岩心测试地应力方向的最便捷、最常用的测试方法。通过利用井下岩心开展波速各向异性及古地磁实验研究,分析了实验过程的可变因素,建立了规范的制样规则及数据处理方法;开展重复实验,评估了波速各向异性结合古地磁确定地应力方向的不确定度。
The direction of in-situ stress is the same as the azimuth of the principal horizontal stress direction.It plays an important role in oil and gas field development.The in-situ stress direction test method includes core analysis,logging data interpretation,seismic data interpretation,etc.The core analysis includes different measuring principles such as wave velocity anisotropy,acoustic emission and differential strain analysis.Wave velocity anisotropy method combined with paleomagnetism method is the most convenient and commonly used method to test the direction of in-situ stress by using non-directional cores.Experimental study on wave velocity anisotropy and paleomagnetism are carried out with downhole cores.Standard sample making rules and data processing methods are established.Repeated experiments are carried out to evaluate the uncertainty degree of the direction of in-situ stress determined by wave velocity anisotropy combined with paleomagnetism.
作者
闵建
马辉运
彭钧亮
韩慧芬
王都
MIN Jian;MA Huiyun;PEN Juanliang;HAN Huifen;WANG Du(Engineering Technology Research Institute of Southwest Oil&Gas field Company,PetroChina,Guanghan,Sichuan 618300,China;National Energy High Sulfur Gas Exploration and Development Center of China)
出处
《钻采工艺》
CAS
北大核心
2020年第S01期17-19,I0001,I0002,共5页
Drilling & Production Technology
基金
中石油西南石油分公司科技项目“川西双鱼石构造下二叠统岩石力学及地应力研究”(编号:20170302-07)。
关键词
地应力方向
波速
各向异性
岩心
古地磁
direction of in-situ stress
wave velocity anisotropy
core
paleomagnetic
