不同孔-缝-洞组合碳酸盐岩储层气水两相孔隙尺度流动模拟

doi:10.11885/j.issn.1674-5086.2021.11.26.03

西南石油大学学报(自然科学版) ›› 2023, Vol. 45 ›› Issue (5): 88-96.DOI: 10.11885/j.issn.1674-5086.2021.11.26.03

不同孔-缝-洞组合碳酸盐岩储层气水两相孔隙尺度流动模拟

张涛¹, 孙天礼², 陈伟华³, 朱国², 汪旭东²

1. 油气藏地质与开发全国重点实验室·西南石油大学, 四川成都 610500;
2. 中国石化西南油气分公司, 四川阆中 637400;
3. 中国石油西南油气田公司工程技术研究院, 四川成都 610017

收稿日期:2021-11-26 发布日期:2023-10-28
通讯作者: 张涛,E-mail:tobiascheuing@163.com
作者简介:张涛,1992生,男,汉族,四川眉山人,助理研究员,博士,主要从事气藏工程理论、多孔介质流动模拟和油气藏数值模拟的研究工作。E-mail:tobiascheuing@163.com;孙天礼,1973年生,男,汉族,陕西宝鸡人,高级工程师,硕士,主要从事天然气开发方面的研究和管理工作。E-mail:stl1973@126.com;陈伟华,1989年生,男,汉族,四川南充人,工程师,硕士,主要从事储层改造方面的研究工作。E-mail:chen_weihua@petrochina.com.cn;朱国,1986年生,男,汉族,四川阆中人,高级工程师,硕士,主要从事油气田开发、污水处理等方面的研究工作。E-mail:zhuguo@sinopec.com;汪旭东,1988年生,男,汉族,四川阆中人,高级工程师,硕士,主要从事油气藏地质及开发等方面的研究工作。E-mail:roukingwang@qq.com
基金资助:
国家自然科学基金青年基金（52304044）；四川省自然科学基金面上项目（2022NSFSC0190）；中国石油-西南石油大学创新联合体科技合作项目（2020CX010403）

Pore-scale Simulation of Gas-water Two Phase Flow in Carbonate Reservoir with Different Combinations of Pore, Network and Hole

ZHANG Tao¹, SUN Tianli², CHEN Weihua³, ZHU Guo², WANG Xudong²

1. National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Southwest Oil & Gas Company, SINOPEC, Langzhong, Sichuan 637400, China;
3. Engineering Technology Research Institute, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610017, China

Received:2021-11-26 Published:2023-10-28

摘要/Abstract

摘要： 碳酸盐岩储层孔缝洞组合类型多样，从孔隙尺度刻画和认识气水两相在不同类型储层中的流动规律具有重要的科学意义。建立了适用于深层碳酸盐岩储层气水两相流动的多松弛颜色梯度格子玻尔兹曼模型（LBM），实现了气水两相在多孔介质中的可视化模拟，揭示了成藏过程（气驱水）和水侵过程（水驱气）不同孔-缝-洞组合流动通道中的气水两相动态流动行为。研究表明，碳酸盐岩气藏成藏过程中主要存在的残余水类型有盲端孔隙水、洞穴边部残余水、水膜水、“H型”残余水和网状残余水；水侵过程中，主要存在的封闭气类型有盲端孔隙封闭气、变径卡断气、绕流封闭气、“H型”封闭气和网状封闭气；由于洞穴体积较大，成藏和水侵过程中缝洞型储层残余水饱和度和封闭气饱和度均最大；裂缝型和缝洞型储层的气相渗流能力随含水饱和度变化波动明显，呈非线性变化规律。研究成果可为深层碳酸盐岩气藏微观渗流、水侵动态预测等提供理论支撑。

关键词: 碳酸盐岩气藏, 格子玻尔兹曼法, 气水两相流, 孔-缝-洞组合, 孔隙尺度

Abstract: There are various combinations of pore, network and hole in carbonate reservoir. It is of great significance to understand and characterize the gas-water two phase flow in these different types of reservoirs. A multi-relaxation color-gradient lattice Boltzmann method (LBM) in adaption to the deep-reservoir condition of carbonate reservoir is proposed. Based on the method, the gas-water two phase flow behaviors for different types of carbonate reservoirs under gas accumulation process (gas displacing water) and water invasion process (water displacing gas) are revealed. The results show that, the types of residue water during gas accumulation process include water in dead-end pore, water in side of hole, water film, water in “H” shape and network shape; the types of enclosed gas during water invasion process include gas in dead-end pore, snap off gas, gas enclosed by bypass, gas in “H” shape and network shape. Because the large volume of holes, the residue water (gas accumulation process) or enclosed gas (water invasion process) of network-hole reservoir is highest compared with other two types of carbonate reservoirs. For network reservoir and pore-hole reservoir, with the change of water saturation, the gas percolation capability is fluctuated instead of linear change with water saturation. This work can be a good support for the development of micro-percolation theory and water-invasion-prediction theory for deep carbonate gas reservoir.

Key words: carbonate gas reservoir, LBM simulation, gas-water two phase flow, combination of pore network and hole, pore scale

中图分类号:

TE319

张涛, 孙天礼, 陈伟华, 朱国, 汪旭东. 不同孔-缝-洞组合碳酸盐岩储层气水两相孔隙尺度流动模拟[J]. 西南石油大学学报(自然科学版), 2023, 45(5): 88-96.

ZHANG Tao, SUN Tianli, CHEN Weihua, ZHU Guo, WANG Xudong. Pore-scale Simulation of Gas-water Two Phase Flow in Carbonate Reservoir with Different Combinations of Pore, Network and Hole[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2023, 45(5): 88-96.

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不同孔-缝-洞组合碳酸盐岩储层气水两相孔隙尺度流动模拟

Pore-scale Simulation of Gas-water Two Phase Flow in Carbonate Reservoir with Different Combinations of Pore, Network and Hole

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