碳酸盐岩储层水平井靶向酸化研究及应用

doi:10.11885/j.issn.1674-5086.2020.05.28.01

西南石油大学学报(自然科学版) ›› 2022, Vol. 44 ›› Issue (4): 121-128.DOI: 10.11885/j.issn.1674-5086.2020.05.28.01

碳酸盐岩储层水平井靶向酸化研究及应用

薛衡^1,2, 何冰¹, 蒋利平^1,2, 曹献平^1,2, 段策^1,2

1. 振华石油控股有限公司, 北京西城 100031;
2. 成都北方石油勘探开发技术有限公司, 四川成都 610000

收稿日期:2020-05-28 发布日期:2022-07-28
通讯作者: 薛衡,E-mail:xueheng@zhenhuaoil.com
作者简介:薛衡,1988年生,男,汉族,四川内江人,高级工程师,博士,主要从事采油工艺及压裂酸化方面的研究。E-mail:xueheng@zhenhuaoil.com
何冰,1981年生,男,汉族,辽宁沈阳人,高级工程师,硕士,主要从事油气田开发生产的管理和研究。E-mail:hebing@zhenhuaoil.com
蒋利平,1979年生,男,汉族,重庆璧山人,研究员级高级工程师,硕士,主要从事油气田开发及提高采收率方向研究。E-mail:jiangliping@zhenhuaoil.com
曹献平,1988年生,男,汉族,湖北宜昌人,工程师,硕士,主要从事采油工艺及井下作业等方面的研究工作。E-mail:caoxianping@zhenhuaoil.com
段策,1986年生,男,汉族,重庆万州人,工程师,硕士,主要从事油藏工程及油藏数值模拟方面的研究。E-mail:duance@zhenhuaoil.com
基金资助:
国家自然科学基金（51474182）；中国博士后科学基金（2018M633404）

Research and Application of Targeted Acidizing Tech in Horizontal Well of Carbonate Reservoir

XUE Heng^1,2, HE Bing¹, JIANG Liping^1,2, CAO Xianping^1,2, DUAN Ce^1,2

1. Zhenhua Oil Co. Ltd., Xicheng, Beijing 100031, China;
2. Chengdu North Petroleum Exploration and Development Technology Co. Ltd., Chengdu, Sichuan 610000, China

Received:2020-05-28 Published:2022-07-28

摘要/Abstract

摘要： 水平井极大增加了油层泄油面积，具有直井无法比拟的优势。但是，油藏强非均质性给有效布酸带来了巨大挑战。结合中东地区碳酸盐岩油藏的开发现状，系统梳理了水平井酸化所面临的关键技术难点。针对油田不同开发阶段，提出了水平井的靶向酸化技术思路，推导了水平井三维径向酸化数学模型，模拟分析了不同布酸方法对水平新、老井酸化效果的影响。研究表明，针对水平（新）井酸化，基于钻井伤害特征的靶向布酸效果优于均匀布酸、物性布酸和锥台布酸；当达到相同酸化效果下，靶向布酸至少能够节约10%酸量；5口新井采液指数分析表明，靶向布酸能够提高新井酸化投产效果。针对水平（老）井酸化，采用局部酸化能够有效实现均衡水平井产液剖面目的；对于局部低渗层段改造，采用1.5 in.（1 in.=2.54 cm）连续油管进行定点喷射酸化，能够形成深穿透酸蚀蚓孔；7口老井酸化前后对比分析表明，靶向布酸能够大幅提高水平井重复酸化效果。

关键词: 碳酸盐岩, 水平井, 基质酸化, 布酸方法, 数值模拟

Abstract: The horizontal well greatly increase the flow area of oil. It's advantages are much higher than that of vertical well. However, the serious heterogeneity of the reservoir brings great challenges to the effective acid placement in horizontal well. Based on the development situation of carbonate reservoirs in the Middle East, this paper systematically analyzes the main technical difficulties faced by acidization of horizontal well. According to the different development stages of the oilfield, the targeted acidizing technology for horizontal wells are proposed. The three-dimensional radial acidizing simulation model for horizontal wells is also deduced. According to the simulation, the influence of acid placement patterns on the acidizing effect are analyzed for both new and old horizontal wells. The research shows that the targeted acid placement pattern based on the drilling damage is better than the uniformed, physical-based and cone-shaped acid placement pattern for new horizontal well; under the same acidizing effect, the targeted acidizing can save at least 10% acid use; the production index analysis of 5 acidized new wells shows that the targeted acidizing can improve the production performance of those wells well. For the acidizing of old horizontal wells, partial acidizing can effectively balance the production profile of horizontal wells; for the partial low-permeability interval with reconstruction, 1.5 in. coiled tubing can be used for jet acidizing, which can penetrate deep into the reservoir through acid wormhole; the analysis of acidization in 7 old wells conducted by re-acidizing shows that targeted acidizing can greatly improve the production capacity for old horizontal wells.

Key words: carbonate, horizontal well, matrix acidizing, acid placement pattern, numerical simulation

中图分类号:

TE257

薛衡, 何冰, 蒋利平, 曹献平, 段策. 碳酸盐岩储层水平井靶向酸化研究及应用[J]. 西南石油大学学报(自然科学版), 2022, 44(4): 121-128.

XUE Heng, HE Bing, JIANG Liping, CAO Xianping, DUAN Ce. Research and Application of Targeted Acidizing Tech in Horizontal Well of Carbonate Reservoir[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(4): 121-128.

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碳酸盐岩储层水平井靶向酸化研究及应用

Research and Application of Targeted Acidizing Tech in Horizontal Well of Carbonate Reservoir

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