BZ油田注水井调剖酸化联作体系研究

油气藏评价与开发 ›› 2019, Vol. 9 ›› Issue (2): 60-64.

BZ油田注水井调剖酸化联作体系研究

刘平礼¹,张峰超¹,高尚²,陶卫东³,冉进喜¹,皇扶杉¹

^1. 西南石油大学油气藏地质及开发工程国家重点实验室,四川成都 610500
^2. 中海石油（中国）有限公司天津分公司渤海石油研究院,天津 300000
^3. 中国石油大港油田公司第四采油厂,天津 300000;

收稿日期:2018-06-15 发布日期:2019-05-07 出版日期:2019-04-26
作者简介:刘平礼（1973—）,男,教授,油气藏增产理论、数值模拟、新方法和技术研究。

Study on combined system of profile control and acidification of injection wells in BZ oilfield

Liu PingLi¹,Zhang Fengchao¹,Gao Shang²,Tao Weidong³,Ran Jinxi¹,Huang Fushan¹

^1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
^2. Bohai Petroleum Research Institute, Tianjin Branch of CNOOC（China） CO., LTD., Tianjin 300000, China
^3. No.4 Oil Production Plant of Dagang Oilfield Company,CNPC Tianjin 300000, China

Received:2018-06-15 Online:2019-05-07 Published:2019-04-26

摘要/Abstract

摘要：

针对BZ油田注水井地层非均质强,单一酸化、调剖无法同时满足增注和减小层间矛盾的问题,在室内开展了酸化、调剖联作体系研究。所用配套酸液体系为单步酸酸液体系,实验评价了其缓速、抑制二次沉淀、溶蚀和配伍性等性能,单岩心酸化后渗透率恢复效果良好。配套调剖剂体系主剂采用阴离子型聚合物,评价了其耐酸性能和岩心封堵能力。采用双岩心夹持流动实验装置模拟非均质地层,分析调剖和酸化的注液顺序对联作处理效果的影响。模拟实验结果显示,先调剖后酸化效果明显,低渗岩心渗透率改善倍比为1.52,高渗岩心得到封堵,渗透率改善倍比为0.29,实现了既缩小层间渗透率差异又启动低渗岩心的目标。

关键词: 注水井, 非均质, 调剖, 酸化, 解堵, 联作

Abstract:

Due to the heterogeneity of the formation of injection wells in BZ oilfield, the single acidification and profile adjustment were impossible to increase the injection and decrease the interlayer contradiction simultaneously. So we studied the combined acidification and profile control system indoors. The supporting acid solution system was one-step acid solution system, and its performance such as retarding speed, inhibiting secondary precipitation, dissolution and compatibility were evaluated experimentally. And then, we obtained that the permeability recovery was good after single core acidizing. The main agent of profile control agent system is anionic polymer, and its acid resistance and core plugging ability were evaluated. A double-core clamping flow test device was used to simulate the non-homogeneous layerss and analyze the influence of the injection sequence of the profile control and acidizing on the combined treatment effect. The simulation results showed that the acidification effect after profile adjustment was obvious, the permeability improvement ratio of low permeability core was 1.52, the permeability improvement ratio of high permeability core was blocked, and the permeability improvement ratio was 0.29. The goal of starting low permeability core by reducing the permeability difference between layers was realized.

Key words: injection well, heterogeneous, profile control, acidification, plugging, combination process

中图分类号:

TE357

刘平礼,张峰超,高尚等. BZ油田注水井调剖酸化联作体系研究[J]. 油气藏评价与开发, 2019, 9(2): 60-64.

PingLi Liu,Fengchao Zhang,Shang Gao, et al. Study on combined system of profile control and acidification of injection wells in BZ oilfield[J]. Reservoir Evaluation and Development, 2019, 9(2): 60-64.

图/表 10

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图7

参考文献 8

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pH	配套酸液螯合能力/（mg·g^-1）			土酸螯合能力/（mg·g^-1）
pH	Ca	Mg	Fe	Ca	Mg	Fe
1	521	185	460	0.25	0.13	0.30
3	544	188	463
5	560	190	440
7	582	180	470
9	585	184	460

时间/min	注入压力/MPa	时间/min	注入压力/MPa
0（突破）	13.5	35	10.8
5	12.6	40	10.2
10	11.3	45	9.8
15	11.1	50	9.9
20	10.4	55	10.1
25	10.3	60	10.2
30	10.6

实验组	岩心编号	流速/（mL·s^-1)					岩心改善倍比
实验组	岩心编号	基液	酸液	基液	酸液	基液	岩心改善倍比
1组调—解	1（高渗）	0.173	0.273	0.276	调堵	0.039	0.22
1组调—解	2（低渗）	0.102	0.126	0.128	调堵	0.092	0.9
2组解—调	3（高渗）	0.189	调堵	0.018	0.053	0.056	0.29
2组解—调	4（低渗）	0.067	调堵	0.052	0.093	0.102	1.52

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