储集层多尺度裂缝高效数值模拟模型

doi:10.7623/syxb201905008

石油学报 ›› 2019, Vol. 40 ›› Issue (5): 587-593,634.DOI: 10.7623/syxb201905008

储集层多尺度裂缝高效数值模拟模型

苏皓^1,2,3, 雷征东³, 李俊超⁴, 龚斌^4,5, 赵文琪³, 鞠斌山^1,2, 张荻萩⁶, 秦鹤³

1. 中国地质大学(北京)能源学院北京 100083;
2. 非常规天然气地质评价与开发工程北京市重点实验室北京 100083;
3. 中国石油勘探开发研究院北京 100083;
4. 南京特雷西能源科技有限公司江苏南京 210019;
5. 中国地质大学(武汉)资源学院湖北武汉 430074;
6. 中国石油经济技术研究院北京 100724

收稿日期:2018-05-14 修回日期:2019-01-24 出版日期:2019-05-25 发布日期:2019-06-03
通讯作者: 龚斌,男,1977年12月生,1999年获石油大学(北京)学士学位,2007年获美国斯坦福大学博士学位,现为中国地质大学(武汉)石油工程系教授、博士生导师,南京特雷西能源科技有限公司董事长,主要从事油藏数值模拟、裂缝性储层建模与粗化等领域的研究工作。Email:gongbin@tracyenergy.cn
作者简介:苏皓,男,1990年9月生,2013年获中国地质大学(北京)资源勘查工程(能源)专业学士学位,2016年获中国地质大学(北京)油气田开发专业硕士学位,现为中国地质大学(北京)博士研究生,主要从事低渗透油藏开发方面的研究工作。Email:suhao0912@qq.com
基金资助:
国家科技重大专项（2017ZX05013-002）和中国石油天然气集团公司科技项目（2017D-5009-01）资助。

An effective numerical simulation model of multi-scale fractures in reservoir

Su Hao^1,2,3, Lei Zhengdong³, Li Junchao⁴, Gong Bin^4,5, Zhao Wenqi³, Ju Binshan^1,2, Zhang Diqiu⁶, Qin He³

1. School of Energy Resources, China University of Geosciences, Beijing 100083, China;
2. Beijing Key Laboratory of Unconventional Natural Gas Geological Evaluation and Development Engineering, Beijing 100083, China;
3. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China;
4. Nanjing Tracy Energy Technologies Inc., Jiangsu Nanjing 210019, China;
5. School of Earth Resources, China University of Geosciences, Hubei Wuhan 430074, China;
6. PetroChina Research Institute of Economics & Technology, Beijing 100724, China

Received:2018-05-14 Revised:2019-01-24 Online:2019-05-25 Published:2019-06-03

摘要/Abstract

摘要：

针对储集层复杂裂缝多尺度特征与现有裂缝数值模拟方法不匹配的问题，建立了多尺度裂缝高效数值模拟三重介质混合模型。模型对多尺度裂缝进行分级处理，对导流能力强、跨度广的大尺度裂缝，采用离散裂缝模型进行显性表征；对导流能力较弱、跨度窄的中尺度和小尺度裂缝，采用传统连续介质模型分别进行双重介质等效和基质增强等效，并提出一套与非结构化网格相适应的形状因子、裂缝孔隙度和渗透率的属性等效方法。基于商业模拟器及矿场实际井资料验证了模型的可靠性。数值模拟结果表明，模型能有效模拟多尺度复杂缝网发育的储集层，与传统连续介质模型和离散裂缝模型相比，模拟效率能大幅提高，同时具有较高的模拟精度。

关键词: 多尺度裂缝, 油藏数值模拟, 离散裂缝模型, 双重介质, 混合模型

Abstract:

In consideration of the mismatching between multi-scale feature of complex fractures in reservoir and their current numerical simulation method, an efficient triple-medium hybrid model for multi-scale fracture was proposed to classify multi-scale fractures. With high conductivity and wide span, the large-scale fractures were explicitly characterized by discrete fracture model, while the meso-scale and small-scale fractures featured with low conductivity and narrow span were upscaling to dual-medium grid and matrix grid through traditional continuum medium model respectively. Moreover, a property equivalent method of shape factor, fracture porosity and permeability in accordance with unstructured grid was put forward. The model reliability was validated by commercial simulators and actual well data of the field. The results show that the model can effectively simulate the reservoir with multi-scale complex fracture. By contrast with both traditional continuous medium model and discrete fracture model, the hybrid model can improve simulation efficiency greatly and remain a high accuracy as well.

Key words: multi-scale fractures, reservoir numerical simulation, discrete fracture model, dual-medium, hybrid model

中图分类号:

TE319

苏皓, 雷征东, 李俊超, 龚斌, 赵文琪, 鞠斌山, 张荻萩, 秦鹤. 储集层多尺度裂缝高效数值模拟模型[J]. 石油学报, 2019, 40(5): 587-593,634.

Su Hao, Lei Zhengdong, Li Junchao, Gong Bin, Zhao Wenqi, Ju Binshan, Zhang Diqiu, Qin He. An effective numerical simulation model of multi-scale fractures in reservoir[J]. Acta Petrolei Sinica, 2019, 40(5): 587-593,634.

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储集层多尺度裂缝高效数值模拟模型

An effective numerical simulation model of multi-scale fractures in reservoir

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