碳酸盐岩酸蚀裂缝表面形态特征的实验研究

doi:10.12108/yxyqc.20200316

岩性油气藏 ›› 2020, Vol. 32 ›› Issue (3): 166–172.doi: 10.12108/yxyqc.20200316

• 石油工程 • 上一篇

碳酸盐岩酸蚀裂缝表面形态特征的实验研究

冯炜^1,2,3, 杨晨^1,3,4, 陶善浔^1,3, 王财忠^1,3, 陆彦颖⁵, 张路锋³, 周福建³

1. 中国石油大学(北京)石油工程学院, 北京 102249;
2. 意大利帕多瓦大学地球科学学院, 帕多瓦 35131;
3. 油气资源与探测国家重点实验室, 北京 102249;
4. 华北水利水电大学水利学院, 郑州 450046;
5. 中国石油集团川庆钻探工程有限公司钻采工程技术研究院, 四川广汉 618300

收稿日期:2019-08-01 修回日期:2019-09-09 出版日期:2020-05-21 发布日期:2020-04-30
第一作者:冯炜(1993-),男,意大利帕多瓦大学在读博士研究生,研究方向为油气井工程和储层改造。地址:(35131) Via G.Gradenigo 6,Padova,Italy。Email:364205440@qq.com。
基金资助:
国家科技重大专项“超深裂缝性气藏井筒失稳机理及转向工艺优化研究”（编号：2016ZX05051）资助

Experimental study on the surface feature of acid-etched fractures in carbonate rocks

FENG Wei^1,2,3, YANG Chen^1,3,4, TAO Shanxun^1,3, WANG Caizhong^1,3, LU Yanying⁵, ZHANG Lufeng³, ZHOU Fujian³

1. College of Petroleum Engineering, China University of Petroleum(Beijing), Beijing 102249, China;
2. Department of Geosciences, University of Padova, Padova 35131, Italy;
3. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum(Beijing), Beijing 102249, China;
4. School ofWater Conservancy, North China University ofWater Resources and Electric Power, Zhengzhou 450046, China;
5. CCDC Drilling and ProductionTechnology Research Institute, Guanghan 618300, Sichuan, China

Received:2019-08-01 Revised:2019-09-09 Online:2020-05-21 Published:2020-04-30

摘要/Abstract

摘要： 酸压是碳酸盐岩储层改造的常规手段，酸液对岩石的非均质刻蚀使得裂缝表面呈现独特的形态特征，目前针对酸蚀前后裂缝表面形态特征的研究还不够深入。因此，通过室内实验借助3D扫描技术获得真实酸蚀裂缝表面几何形态数据，引入新的表征参数h_n和ε_h，定量描述了裂缝表面的起伏程度，对比了酸蚀前后裂缝表面形态的变化。结果表明：酸蚀反应掉水力裂缝的槽点；沿酸液流动方向形成明显的沟槽，凸起部分变缓，曲折比减小，总体起伏程度增大；垂直酸液流动方向上形成了连续的上下波动，曲折比和起伏程度均增大。

关键词: 酸岩反应, 裂缝表面形态, 表征参数, 起伏程度

Abstract: Acid fracturing is a common method for stimulating carbonate reservoir. The surface characteristics of acid-etched fracture is unique due to the non-uniform acid-etching. At present,the research on geometric feature of fracture surface before and after etching is not enough. In this paper,advanced experimental devices were used to obtain real acid-etched fracture samples,then the geometric characteristics of the fracture surface were analyzed by using 3D scanning data,and the new parameters h_n and ε_h were defined to quantitatively describe the fluctuation degree. Furthermore,the change of fracture surface patterns before and after acid-etching were compared. The results show that gullies and holes were formed on the fracture surface and the fluctuation degree increased,the tortuosity decreased along the flow direction and increased vertically to flow direction after acid-etching.

Key words: acid-rock reaction, surface feature, description parameters, fluctuation degree

中图分类号:

TE34

冯炜, 杨晨, 陶善浔, 王财忠, 陆彦颖, 张路锋, 周福建. 碳酸盐岩酸蚀裂缝表面形态特征的实验研究[J]. 岩性油气藏, 2020, 32(3): 166–172.

FENG Wei, YANG Chen, TAO Shanxun, WANG Caizhong, LU Yanying, ZHANG Lufeng, ZHOU Fujian. Experimental study on the surface feature of acid-etched fractures in carbonate rocks[J]. Lithologic Reservoirs, 2020, 32(3): 166–172.

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碳酸盐岩酸蚀裂缝表面形态特征的实验研究

Experimental study on the surface feature of acid-etched fractures in carbonate rocks

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