基于非达西渗流和压力敏感性的页岩油压裂水平井产能计算方法  

Calculation method of shale oil fractured horizontal well productivity based on non-Darcy and pressure sensitive features

作　　者：姜博明 穆朗枫 阎逸群 李齐 吴忠宝[1] 陈建阳[1] JIANG Boming;MU Langfeng;YAN Yiqun;LI Qi;WU Zhongbao;CHEN Jianyang(Tight Oil Research Institute,PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;School of Earth and Space Science,Peking University,Beijing 100871,China;Chinese Academy of Geological Sciences,Beijing 100032,China;Exploration and Development Research Institute of PetroChina Daqing Oilfield Co Ltd,Daqing 163712,China)

机构地区：[1]中国石油勘探开发研究院致密油研究所,北京100083 [2]北京大学地球与空间科学学院,北京100871 [3]中国地质科学研究院,北京100032 [4]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2023年第2期152-159,共8页Petroleum Geology & Oilfield Development in Daqing

基　　金：中国石油“十四五”基础性前瞻性重大科技项目“致密油多种注入介质补充能量开发优化技术研究”(2021DJ2206)。

摘　　要：为了对页岩油压裂水平井产能进行定量评价,考虑非达西渗流和压力敏感性对页岩油产能的影响,运用保角变换方法和复势叠加理论,推导出存在启动压力梯度和压力敏感性的压裂水平井产能公式。运用该公式定量地计算出各个裂缝的产能,此外还分析了启动压力梯度、压力敏感系数、裂缝半长、裂缝条数等因素对产能的影响。结果表明,水平井的产能随着启动压力梯度、压力敏感系数的增大而减小;随裂缝半长和裂缝条数的增加而增大,但增大幅度逐渐减小。研究成果为页岩油压裂水平井的产能预测提供了依据。In order to quantitatively evaluate productivity of shale oil fractured horizontal wells,based on influence of non-Darcy flow and pressure sensitivity on shale oil productivity,conformal transformation method and complex potential superposition theory are used to deduce productivity formula in volumetric fractured horizontal wells with startup pressure gradient and pressure sensitivity,and productivity of each fracture is quantitatively calculated by using this formula.In addition,the influence of startup pressure gradient,pressure sensitivity coefficient,fracture half length and number of fractures on productivity are analyzed.The results show that the productivity of horizontal wells decreases with the increase of startup pressure gradient and pressure sensitivity coefficient,and the productivity of fractured horizontal wells increases with the increase of fracture half-length and the number of fractures while the increase range gradually decreases.This method provides basis for shale oil fractured horizontal well productivity prediction.

关 键 词：页岩油 水平井 启动压力梯度 压力敏感性 产能预测 

分 类 号：TE349[石油与天然气工程—油气田开发工程]