基于应力敏感与基质收缩效应的低渗油藏数值模拟方法及应用

doi:10.3969/j.issn.1006-6535.2022.02.016

特种油气藏 ›› 2022, Vol. 29 ›› Issue (2): 110-114.DOI: 10.3969/j.issn.1006-6535.2022.02.016

基于应力敏感与基质收缩效应的低渗油藏数值模拟方法及应用

万晓龙^1,2, 王思仪^1,2, 郭西峰^1,2, 兰正凯^3,4

1.中国石油长庆油田分公司,陕西西安 710018;
2.低渗透油气田勘探开发国家工程重点实验室,陕西西安 710018;
3.中国地质大学(武汉),湖北武汉 430000;
4.南京特雷西能源科技有限公司,江苏南京 210000

收稿日期:2021-04-14 修回日期:2021-12-31 出版日期:2022-04-25 发布日期:2023-01-10
作者简介:万晓龙(1978—),男,高级工程师,2000年毕业于大庆石油学院石油天然气地质专业,2003年毕业于石油大学(北京)矿产普查与勘探专业,获硕士学位,现主要从事油气田开发方面的研究工作。
基金资助:
国家科技重大专项“鄂尔多斯盆地致密油开发示范工程”(2017ZX05069);中国石油科技重大专项“长庆油田5000万吨持续高效稳产关键技术研究与应用”(2016E-05)

Numerical Modeling Method of Low-permeability Reservoir Based on Stress Sensitivity and Matrix Shrinkage Effect and Its Application

Wan Xiaolong^1,2, Wang Siyi^1,2, Guo Xifeng^1,2, Lan Zhengkai^3,4

1. PetroChina Changqing Oilfield Company, Xi′an, Shaanxi 710018, China;
2. National Engineering Laboratory of Low-permeability Oil ＆ Gas Exploration and Development, Xi′an, Shaanxi 710018, China;
3. China University of Geosciences (Wuhan), Wuhan, Hubei 430000, China;
4. Nanjing Tracy Energy Technology Co., Ltd., Nanjing, Jiangsu 210000, China

Received:2021-04-14 Revised:2021-12-31 Online:2022-04-25 Published:2023-01-10

摘要/Abstract

摘要： 低渗透油藏开发往往仅考虑应力敏感效应而忽略基质孔隙收缩效应的影响,导致储层渗流能力和产能评价结果误差较大。针对上述问题,运用油藏工程方法,建立了考虑应力敏感和基质收缩双重效应影响的数学模型,结合基于分形理论的渗透率演化模型,探讨其在安塞油田预测生产动态的可行性。研究表明:在低于5 MPa的有效应力下,若忽视基质收缩效应会低估储层渗透率,影响开发方案的后期调整;文中建立的理论模型与实际生产数据匹配性达到92%,说明该模型可较好地预测研究区油井生产动态。研究成果对长庆油田类似低渗透油藏开发后期挖潜调整具有重要指导意义。

关键词: 低渗透油藏, 收缩效应, 应力敏感, 孔径, 数值模拟, 安塞油田

Abstract: In low-permeability reservoirs, stress sensitivity effect is often considered while matrix pore shrinkage effect is ignored, resulting in great errors in the evaluation results of reservoir permeability and productivity. To address the above problems, a mathematical model considering the effects of both stress sensitivity and matrix shrinkage was established with reservoir engineering methods, to explore its feasibility in predicting production performance in the Ansai Oilfield, in combination with a permeability evolution model based on fractal theory. The study showed that under the effective stress below 5 MPa, if the matrix shrinkage effect was ignored, the reservoir permeability was underestimated, which affected the later adjustment of the development plan; the theoretical model established in this paper matched the actual production data by 92%, indicating that the model can better predict the production performance of oil wells in the study area. The study results can be used as an important reference for the late tapping potential and adjustment of similar low-permeability reservoirs in Changqing Oilfield.

Key words: low-permeability reservoir, shrinkage effect, stress sensitivity, pore size, numerical modeling, Ansai Oilfield

中图分类号:

TE348

万晓龙, 王思仪, 郭西峰, 兰正凯. 基于应力敏感与基质收缩效应的低渗油藏数值模拟方法及应用[J]. 特种油气藏, 2022, 29(2): 110-114.

Wan Xiaolong, Wang Siyi, Guo Xifeng, Lan Zhengkai. Numerical Modeling Method of Low-permeability Reservoir Based on Stress Sensitivity and Matrix Shrinkage Effect and Its Application[J]. Special Oil & Gas Reservoirs, 2022, 29(2): 110-114.

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基于应力敏感与基质收缩效应的低渗油藏数值模拟方法及应用

Numerical Modeling Method of Low-permeability Reservoir Based on Stress Sensitivity and Matrix Shrinkage Effect and Its Application

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