注水诱导裂缝动态特征及数值模拟研究

doi:10.3969/j.issn.1006-6535.2023.05.011

特种油气藏 ›› 2023, Vol. 30 ›› Issue (5): 84-90.DOI: 10.3969/j.issn.1006-6535.2023.05.011

注水诱导裂缝动态特征及数值模拟研究

程林松¹, 杨晨旭², 曹仁义¹, 贾品¹, 蒲保彪¹, 时俊杰¹

1.中国石油大学(北京),北京 102200;
2.中海石油(中国)有限公司天津分公司,天津 300452

收稿日期:2022-07-15 修回日期:2023-09-01 出版日期:2023-10-25 发布日期:2023-12-25
通讯作者: 杨晨旭(1995—),男,工程师,2017年毕业于中国石油大学(华东)海洋油气工程专业,2022年毕业于中国石油大学(北京)油气田开发工程专业,获博士学位,现主要从事油气渗流理论及裂缝性油气藏数值模拟方面的研究工作。
作者简介:程林松(1965—),男,教授,博士生导师,1986年毕业于华东石油学院采油工程专业,1994年毕业于石油大学(北京)油气田开发工程专业,获博士学位,现主要从事油气渗流理论方面的研究和教学工作。
基金资助:
国家自然科学基金“致密储层‘压裂成藏’油水赋存状态变化机理及渗流数学模型研究”(52004307)、“富有机质页岩纳米孔隙中油-气体系重布机制及流体动力学性质表征”(52174038);中国石油科技重大专项“鄂尔多斯盆地致密油-页岩油油藏工程方法及关键技术研究”(ZLZX2020-02-04)

Dynamic Characteristics and Numerical Simulation Research of Waterflood-induced Fractures

Cheng Linsong¹, Yang Chenxu², Cao Renyi¹, Jia Pin¹, Pu Baobiao¹, Shi Junjie¹

1. China University of Petroleum (Beijing), Beijing 102200, China;
2. Tianjin Branch of CNOOC Ltd.,Tianjin 300452,China

Received:2022-07-15 Revised:2023-09-01 Online:2023-10-25 Published:2023-12-25

摘要/Abstract

摘要： 传统油藏数值模拟软件只能考虑静态裂缝,无法模拟长期注水过程中裂缝扩展对于井网开发的影响,模拟结果与实际生产动态数据的拟合效果较差。针对该问题,基于嵌入式离散裂缝模型(EDFM),通过前处理算法的动态改进,形成了复杂动态裂缝网络的表征方法,并通过耦合交叉裂缝判别准则建立了一种高效的注水诱导裂缝模拟方法。研究表明:注水诱导裂缝模拟方法能够高效模拟油藏注水开发过程中裂缝的动态变化,反映天然裂缝对于主裂缝扩展路径的影响;与Abaqus软件计算结果一致,计算效率更高。实践应用表明,该方法对注水诱导裂缝数值模拟具有较好的适应性,可准确实现对现场注水井组含水上升规律的拟合,对超低渗透油藏的生产动态分析、后期井网调整具有较好的借鉴意义。

关键词: 超低渗透油藏, 注水诱导裂缝, 交叉裂缝, 数值模拟

Abstract: Traditional reservoir numerical simulation software just only consider the static fractures but cannot simulate the impact of fracture expansion on well network development during long-term water injection, and the simulation results are poorly fitted to the actual production dynamic data. To address this problem, a characterization method for complex dynamic fracture networks is developed based on the embedded discrete fracture model (EDFM) with dynamic improvement of pre-processing algorithms. The study shows that an efficient waterflood-induced fracture simulation method is established by coupling cross-fracture discrimination criteria, which can efficiently simulate the dynamic changes of fractures during reservoir injection and development and reflect the influence of natural fractures on the main fracture propagation path; the results are consistent compared with Abaqus software, while the computational efficiency is higher. The application example shows that the method has good adaptability for numerical simulation of waterflood-induced fractures, can accurately achieve the fitting of the water cut rising rules of the field water injection well cluster, which and has good reference significance for production dynamic analysis of ultra-low permeability reservoirs and later well pattern adjustment.

Key words: ultra-low permeability reservoir, waterflood-induced fracture, cross fracture, numerical simulation

中图分类号:

TE348

程林松, 杨晨旭, 曹仁义, 贾品, 蒲保彪, 时俊杰. 注水诱导裂缝动态特征及数值模拟研究[J]. 特种油气藏, 2023, 30(5): 84-90.

Cheng Linsong, Yang Chenxu, Cao Renyi, Jia Pin, Pu Baobiao, Shi Junjie. Dynamic Characteristics and Numerical Simulation Research of Waterflood-induced Fractures[J]. Special Oil & Gas Reservoirs, 2023, 30(5): 84-90.

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注水诱导裂缝动态特征及数值模拟研究

Dynamic Characteristics and Numerical Simulation Research of Waterflood-induced Fractures

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