分形裂缝性页岩气藏多段压裂水平井瞬态压力特征

doi:10.19596/j.cnki.1001-246x.7929

计算物理 ›› 2019, Vol. 36 ›› Issue (5): 559-568.DOI: 10.19596/j.cnki.1001-246x.7929

分形裂缝性页岩气藏多段压裂水平井瞬态压力特征

丁明才, 吴明录, 李轩, 姚军

中国石油大学(华东)石油工程学院, 山东青岛 266580

收稿日期:2018-07-19 修回日期:2019-01-01 出版日期:2019-09-25 发布日期:2019-09-25
通讯作者: 吴明录(1978-),男,博士,副教授,硕士生导师,主要从事油气田开发工程研究,E-mail:wuminglu@upc.edu.cn
作者简介:丁明才(1992-),男,硕士研究生,主要从事油气田开发工程研究工作,E-mail:dingmc1992@163.com
基金资助:
国家自然科学基金重大项目（51490654）资助

Characteristics of Transient Pressure for Multiple Fractured Horizontal Wells in Fractal Fractured Shale Gas Reservoirs

DING Mingcai, WU Minglu, LI Xuan, YAO Jun

School of Petroleum Engineering in China University of Petroleum, Qingdao Shandong 266580, China

Received:2018-07-19 Revised:2019-01-01 Online:2019-09-25 Published:2019-09-25

摘要/Abstract

摘要： 基于分形理论和连续性假设，考虑页岩气吸附解吸、基质-裂缝窜流等机制，建立分形裂缝性页岩气藏多段压裂水平井试井解释模型，并通过拉氏变换、点源函数及压降叠加原理等方法得到模型的解.绘制无因次压力随时间变化的双对数曲线，研究分形裂缝性页岩气藏多段压裂水平井的压力特征，分析分形指数、分形维数等参数对压力动态的影响.结果表明：分形裂缝性页岩气藏多段压裂水平井的压力动态可划分为7个流动阶段；分形指数越大或分形维数越小，晚期径向流直线段的斜率越大；其它参数对水平井的压力动态也有一定的影响.

关键词: 分形, 页岩气, 压力动态, 水平井, 多段压裂

Abstract: Based on theory of fractal and assumption of continuity, a well test model for multiple fractured horizontal wells in fractal fractured shale gas reservoirs was established in which adsorption, desorption and cross flow between matrix and fractures are considered. Solution of the model was obtained with Laplace transform, point source solution and pressure drop superposition principles. Double logarithmic curves of dimensionless pressure changing over time were obtained. Characteristics of pressure of multiple fractured horizontal well in fractal fractured shale gas reservoirs and influence of parameters, such as fractal index and fractal dimension, on pressure and production curves were analyzed. It shows that the curves can be divided into 7 flow stages. Slope of unstable pressure well-test curves in the middle and late stages is greater with bigger fractal index or smaller fractal dimension.

Key words: fractal, shale gas, dynamic pressure, horizontal well, multiple fractured

中图分类号:

TE122

丁明才, 吴明录, 李轩, 姚军. 分形裂缝性页岩气藏多段压裂水平井瞬态压力特征[J]. 计算物理, 2019, 36(5): 559-568.

DING Mingcai, WU Minglu, LI Xuan, YAO Jun. Characteristics of Transient Pressure for Multiple Fractured Horizontal Wells in Fractal Fractured Shale Gas Reservoirs[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2019, 36(5): 559-568.

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分形裂缝性页岩气藏多段压裂水平井瞬态压力特征

Characteristics of Transient Pressure for Multiple Fractured Horizontal Wells in Fractal Fractured Shale Gas Reservoirs

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