水平井中前置液压力传递规律研究  

Pressure Transfer Law Study of Pad Fluid in Horizontal Wells

作　　者：龚迪光[1] 曲占庆[1] 郭天魁[1] 曲冠政[1] 陈雷 田雨[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,青岛266580 [2]中国石油大学储运与建筑工程学院,青岛266580

出　　处：《科学技术与工程》2015年第8期172-175,共4页Science Technology and Engineering

基　　金：国家自然科学基金青年科学基金项目(51404288)资助

摘　　要：以判定人工裂缝起裂点位于径向井远端天然裂缝处还是近井筒地带为目的,以质量守恒和动量守恒定理为出发点,考虑液体的黏性和可压缩性,建立幂律流体前置液压力波传递数学模型。利用有限差分法求解压力波速值,并对计算结果进行实验检验。实验结果与计算结果对比发现,两者平均计算误差为4.70%,压力波传递数学模型准确性较高。在此基础上推导出水平井压力分布与波速的函数关系式。通过研究幂律流体前置液在水平井中压力传递规律,可揭示水平井尤其是径向水井中压力分布规律,为精细描述前置液压力分布提供理论依据。To determine the artificial fracture initiation point is located in the distal radial well natural cracks or near wellbore zone for the purpose of study,based on mass and momentum conservation,considering the viscosity and the compressibility of liquid,a power-law pad fluid pressure wave transmitting mathematical models is developed. The pressure wave velocity is calculated by Finite Difference Method and verified by experiments. Compared experimental result to computing result,the average calculation error is 4. 70% and the mathematical model of pressure wave propagation shows higher accuracy. On this basis,a function about horizontal well pressure distribution and pressure velocity is derived. Through the research of pressure transfer law of power-law pad fluid in horizontal wells,the pressure distribution of horizontal wells especially radial horizontal wells could be revealed and a theoretical basis for the fine description of the pad fluid pressure distribution can be provided.

关 键 词：压力传递 压力分布 幂律流体 前置液 水平井 径向水平井 

分 类 号：TE355.2[石油与天然气工程—油气田开发工程]