一种基于随钻VSP地震地质导向的钻井轨迹高效优化方法及其应用

杨敬雅, 李相文, 刘永雷, 徐博, 高江涛, 王茂, 吴江勇, 张泉

An efficient method for drilling trajectory optimization based on seismological and geological guidance of VSP data during drilling and its application

Jing-Ya YANG, Xiang-Wen LI, Yong-Lei LIU, Bo XU, Jiang-Tao GAO, Mao WANG, Jiang-Yong WU, Quan ZHANG

图1 随钻VSP地震地质导向技术思路 a—随钻VSP地震地质导向技术总流程;b—TTI各向异性参数场建流程和地质解释;c—轨迹调整流程;流程中的速度为纵波垂直方向传播的速度;δ为变异系数(描述垂向速度的变化程度);ε为纵波各向异性强度(描述水平与垂直速度差异);θ为地层的倾角;Φ为方位角

Fig.1 The research route of VSP seismic geological guidance technology while drilling a—the general process of VSP seismic geological guidance technology while drilling,including;b—TTI anisotropic parameter field construction process and geological interpretation;c—trajectory adjustment process;the velocity in the process is the velocity of vertical propagation of P-wave;δ:the coefficient of variation (describing the degree of variation of vertical velocity);ε:the intensity of P-wave anisotropy (describing the difference between horizontal and vertical velocity);θ:the dip angle of formation;Φ:the azimuth angle