基于曲率属性的构造应力预测方法  

Tectonic stress prediction method based on curvature attribute

作　　者：马妮 印兴耀[2,3] 宗兆云 孙成禹[2,3] 王世星 MA Ni;YIN Xingyao;ZONG Zhaoyun;SUN Chengyu;WANG Shixing(SINOPEC Geophysical Research Institute,Nanjing,Jiangsu 211103,China;School of Geosciences,China University of Petroleum(East China),Qingdao,Shandong 266580,China;Laboratory for Marine Mineral Resources,QingdaoNational Laboratory for Marine Science and Technology,Qingdao,Shandong 266071,China)

机构地区：[1]中国石化石油物探技术研究院,江苏南京211103 [2]中国石油大学(华东)地球科学与技术学院,山东青岛266580 [3]海洋国家实验室海洋矿产资源评价与探测技术功能实验室,山东青岛266071

出　　处：《石油地球物理勘探》2020年第3期643-650,472-473,共10页Oil Geophysical Prospecting

基　　金：国家自然科学基金项目“非常规油气富集机制与地球物理甜点识别”(U1562215);国家科技重大专项“页岩储层压裂微地震监测技术研究”(2017ZX05036-005-010)联合资助

摘　　要：利用曲率属性估算构造应力的传统方法是通过x、y方向的曲率和xOy面的扭率计算相应的应力分量,进而求取构造应力。但是,这些方法没有构建曲率属性与构造应力的直接关系,且目前商业软件通常不能直接提取x、y方向的曲率和xOy面的扭率,只能直接提取最大正曲率、最小负曲率等属性。因此,在薄板弯曲理论的假设条件下,推导最大正曲率、最小负曲率与构造应力之间的关系,建立基于最大正曲率、最小负曲率属性的构造应力估算方法。该方法实用、简单易行。实际资料的应用表明,该方法与传统方法的构造应力预测效果一致。Traditional methods for estimating tectonic stress using curvature attribute calculate stress components through the curvatures in x and y directions and the torsion on xOy plane to obtain tectonic stress.However,no direct relationship can be established between curvatures and tectonic stress,and available commercial software usually cannot directly extract the curvatures in xand ydirections and the torsion on xOy plane,but can only directly extract attributes such as maximum positive curvature and minimum negative curvature and so on.On the assumptions of the thin plate bending theory,the relationship among maximum positive curvature,minimum negative curvature and tectonic stress has been established,which is used to estimate tectonic stress based on maximum positive curvature and minimum negative curvature.This method is practical and simple to use.Applications have proved that the method can provide consistent results with traditional methods in predicting tectonic stress.

关 键 词：薄板弯曲理论 最大正曲率 最小负曲率 构造应力 

分 类 号：P631.4[天文地球—地质矿产勘探] P542[天文地球—地质学]