吐哈油田水平井地质优化设计技术研究与应用

Study and Application of Optimized Geology Design Technology of Horizontal Well in Tuha Oilfield

吐哈油田油藏类型多、构造复杂,地质认识程度差异是油田水平井成败的最主要影响因素。结合油田实际情况,利用理论研究和数值模拟技术,对水平井的井网形式、水平段方向、水平段垂向位置和水平段长度进行了优化设计,并得出合理结论。以精细油藏描述为基础,结合油藏地质特征,优化各项地质参数,实现最优设计;利用导眼和随钻资料及时修正设计。水平井在吐哈油田各类油藏实施效果好,成功率高,单井平均产量在设计目标之上。水平井实钻情况与地质认识符合较好,大部分参数吻合程度高。

Various types of the main affecting factors in reservoir, complicated structure and difference of understanding degree of geology are drilling horizontal well in Tuha oilfield. In the light of the reality of the oilfinld, using theoretical study and numerical simulation technology optimized design of spacing pattern, horizontal section direction, horizontal section vertical position and horizontal section length of horizontal well are conducted, and rational conclusions can be obtained. Based on the fine reservoir description, combining reservoir geologic characteristics, geologic parameters are optimized and optimized design is achieved. Using pilot hole, data - while - drilling and timelydesign revision, it is successful and has good effect to apply horizontal well in different types of reservoir in Tuha oilfield, and average output of single well is achieved above the design target. Actual drilling of horizontal well is well - coincident with geology understanding.