耐高温栲胶堵剂的研制及油藏适应性评价

doi:10.13809/j.cnki.cn32-1825/te.2021.03.022

油气藏评价与开发 ›› 2021, Vol. 11 ›› Issue (3): 452-458.doi: 10.13809/j.cnki.cn32-1825/te.2021.03.022

耐高温栲胶堵剂的研制及油藏适应性评价

刘刚¹(),王俊衡²(),王丹翎³,颜永何¹,蒋雪峰¹,王倩¹

1.中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依 834000
2.西南石油大学,四川成都 610500
3.中海石油（中国）有限公司深圳分公司,广东深圳 518054

收稿日期:2020-03-25 出版日期:2021-06-22 发布日期:2021-06-24
通讯作者: 王俊衡 E-mail:fcliug@petrochina.com.cn;1187395805@qq.com
作者简介:刘刚（1989—）,男,硕士,工程师,从事稠油开发研究。地址：新疆克拉玛依市克拉玛依区准噶尔路32号中国石油新疆油田分公司勘探开发研究院,邮政编码：834000。E-mail: fcliug@petrochina.com.cn
基金资助:
国家科技重大专项“稠油多介质蒸汽驱技术研究与应用”(2016ZX05012-001);中国石油重大专项“新疆油田浅层稠油稳产提效技术研究与应用”(2017E-04-08)

Development and reservoir adaptability evaluation of a high temperature resistant plugging agent: tannin extract

LIU Gang¹(),WANG Junheng²(),WANG Danling³,YAN Yonghe¹,JIANG Xuefeng¹,WANG Qian¹

1. Exploration and Development Research Institute of PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China
2. Southwest Petroleum University, Chengdu, Sichuan 610500, China
3. Shenzhen Branch of CNOOC（China） Co., Ltd., Shenzhen, Guangdong 518054, China

Received:2020-03-25 Online:2021-06-22 Published:2021-06-24
Contact: WANG Junheng E-mail:fcliug@petrochina.com.cn;1187395805@qq.com

摘要/Abstract

摘要：

稠油油藏蒸汽驱控制汽窜使用的耐高温堵剂存在强度低、老化稳定性差等问题,急需研发新型耐高温堵剂,推进现场应用。针对新疆油田九₆区齐古组稠油油藏层间非均质性强导致的蒸汽驱汽窜严重、泡沫驱效果差等生产技术难题,研制出了由磺化栲胶、交联剂和促进剂组成的适用于高温油藏的磺化栲胶堵剂体系。通过静态评价实验,优化出堵剂配方为：0.6 %磺化栲胶+（2.0 %~2.5 %）醛类交联剂Ⅰ+（1.0 %~2.0 %）酚类交联剂Ⅱ+（0.05 %~0.06 %）促进剂。油藏适应性评价结果表明：在油藏温度下老化30 d后堵剂强度保持H级以上,堵剂的封堵效率在94 %以上,研究成果为克拉玛依油田九₆区齐古组稠油油藏控制蒸汽窜技术的现场应用奠定了基础。

关键词: 稠油油藏, 汽窜, 耐高温堵剂, 磺化栲胶, 油藏适应性评价

Abstract:

There are several problems in the high temperature resistant plugging agent used in steam flooding of heavy oil reservoirs to control steam channeling, such as low strength and poor long-term stability. So, it is urgent to develop a new type of high temperature resistant plugging agent to promote on-site application. In order to solve the technical problems caused by strong inter-layer heterogeneity of the heavy oil reservoirs in District 9-6 of Qigu Formation in Xinjiang Oilfield, including severe steam channeling and poor foam flooding effects, a plugging agent system suitable for high temperature reservoirs and composed of sulfonated tannin extract, cross-linking agent and accelerant has been developed. By the static evaluation experiment, it is found that the optimized formula of the plugging agent is as follows: 0.6 % sulfonated tannin extract + （2.0 % ~ 2.5 %） aldehyde cross-linking agent Ⅰ +（1.0 % ~ 2.0 %） phenol cross-linking agent Ⅱ +（0.05 % ~ 0.06 %） accelerant. The evaluation of reservoir adaptability shows that the strength of the plugging agent remains above level H after 30 days of aging at the reservoir temperature, and the plugging efficiency is above 94 %. It has laid a foundation for the field application of steam channeling control technologies in the heavy oil reservoirs of District 9-6 of Qigu Formation in Karamay Oilfield.

Key words: heavy oil reservoir, steam channeling, high temperature resistant plugging agent, sulfonated tannin extract, reservoir adaptability evaluation

中图分类号:

TE39

刘刚,王俊衡,王丹翎,颜永何,蒋雪峰,王倩. 耐高温栲胶堵剂的研制及油藏适应性评价[J]. 油气藏评价与开发, 2021, 11(3): 452-458.

LIU Gang,WANG Junheng,WANG Danling,YAN Yonghe,JIANG Xuefeng,WANG Qian. Development and reservoir adaptability evaluation of a high temperature resistant plugging agent: tannin extract[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(3): 452-458.

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等级	状态描述	分类
A	凝胶黏度与初始聚合物溶液黏度相同, 目测未形成凝胶	无法成胶
B	凝胶黏度比初始聚合物黏度稍有增加	弱凝胶
C	倒置有明显的流动	弱凝胶
D	有少量凝胶不能快速流动	弱凝胶
E	凝胶不易流动	中等凝胶
F	凝胶只能在顶部小范围内流动	中等凝胶
G	凝胶流动大约下降一半	中等凝胶
H	倒置仅凝胶表面可轻微变形	强凝胶
I	倒置凝胶表面不变形	强凝胶

栲胶质量分数（%）	成胶时间（h）	成胶强度	栲胶质量分数（%）	成胶时间（h）	成胶强度
0.1			0.6	11.8	H
0.2			0.7	9.4	H
0.3	18.2	E	0.8	8.5	I
0.4	16.3	G	0.9	7.6	I
0.5	13.6	G	1.0	7.7	I

交联剂体积分数（%）	成胶时间（h）	成胶强度
0.5	17.9	F
1.0	15.6	G
1.5	12.4	G
2.0	11.5	H
2.5	9.5	I
3.0	7.9	I
3.5	7.3	F
4.0	6.5	D

交联剂体积分数（%）	成胶时间（h）	成胶强度
0	18.6	F
0.5	14.1	G
1.0	12.0	H
1.5	10.6	I
2.0	9.7	I
2.5	8.4	F
3.0	7.2	D

促进剂质量分数（%）	成胶时间（h）	成胶强度
0.01	17.9	F
0.02	15.6	F
0.03	13.3	G
0.04	12.5	G
0.05	11.7	H
0.06	9.8	H
0.07	9.2	H
0.08	8.4	I
0.09	7.6	I
0.10	7.1	I

耐高温栲胶堵剂的研制及油藏适应性评价

Development and reservoir adaptability evaluation of a high temperature resistant plugging agent: tannin extract

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温度（℃）	成胶时间（h）	成胶强度	老化30 d后
25	未成胶	未成胶	未成胶
50	24.3	G	稳定
100	15.5	H	稳定
150	10.7	H	微量脱水

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pH值	成胶时间（h）	成胶强度
5	17.6	G
6	13.8	H
7	12.6	H
8	11.7	H
9	11.0	H
10	10.2	I
11	6.9	F

岩心编号	长度（cm）	直径（cm）	孔隙体积（cm³）	孔隙度（%）	水测渗透率（10^-3 μm²）
1#	50	2.54	81.8	32.3	1 726.1
2#	50	2.54	74.8	29.6	1 688.3

岩心编号	注入堵剂（PV）	封堵后水测渗透率（10^-3 μm²）	突破压力（MPa）	突破压力梯度（MPa/m）	封堵率（%）
1#	0.5	101.8	1.98	3.46	94.1
2#	0.5	87.8	1.73	3.96	94.8