大斜度井/水平井中裂缝的阵列侧向测井响应特性

Response characteristics of array lateral logging of cracks in highly deviated wells and horizontal wells

倪小威 徐观佑 艾林 敖旋峰 徐思慧 刘迪仁 2

长江大学油气资源与勘探技术教育部重点实验室，湖北 武汉 430100 长江大学地球物理与石油资源学院，湖北 武汉 430100 长江大学电子信息学院，湖北 荆州 434023

MOE Key Laboratory of Exploration Technologies for Oil and Gas Resources, Yangtze University, Wuhan 430100, China School of Geophysics and Oil Resources, Yangtze University, Wuhan 430100, China Electronics & Information School, Yangtze University, Jingzhou 434023, China

文中建立三维球状介质模型，利用三维有限元数值模拟方法研究大斜度井、水平井中阵列侧向测井响应特征。研究表明：裂缝孔隙度对裂缝的测井响应影响最为强烈，裂缝孔隙度的改变会造成视电阻率值呈倍数的改变；裂缝倾角对仪器响应的影响依托于裂缝孔隙度的大小，当裂缝孔隙度小于0.000 1，裂缝倾角对测井响应的影响可以忽略；不同井斜角下裂缝的阵列侧向测井响应差异较大，大斜度井条件下的仪器响应出现尖峰，位置与井斜角和裂缝倾角有关。

The three-dimensional finite element numerical simulation method was applyed to study the array lateral logging response characteristics of fractures in high deviated wells and horizontal wells. The results show that the crack porosity has the most influence on the logging response of the fracture, and the change of the fracture porosity will cause huge change of the apparent resistivity value. The effect of crack inclination on the response of the instrument depends on the size of the fracture porosity. When the fracture porosity is less than 0.000 1, the influence of the crack inclination on the logging response can be ignored. The logging responses of the fractures in different well angles are different. There is a "spike" phenomenon in the response of the instrument under the condition of the high deviated well, and the position of the spike is related to the inclination of the well and the crack

10.6056/dkyqt201803014