[1]江昀,杨贤友,李越,等. 大北-克深区块致密砂岩气藏水锁伤害防治[J].深圳大学学报理工版,2017,34(No.6(551-660)):640-646.
 Jiang Yun,Yang Xianyou,Li Yue,et al. Solutions for water block damage of tight gas reservoirs in Dabei-Keshen area[J].Journal of Shenzhen University Science and Engineering,2017,34(No.6(551-660)):640-646.
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 大北-克深区块致密砂岩气藏水锁伤害防治()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第34卷
期数:
2017年No.6(551-660)
页码:
640-646
栏目:
环境与能源
出版日期:
2017-11-30

文章信息/Info

Title:
 Solutions for water block damage of tight gas reservoirs in Dabei-Keshen area
作者:
 江昀1杨贤友1李越2石阳1许国庆1余玥3
 1)中国石油勘探开发研究院, 北京 100083;2)中海石油(中国)有限公司天津分公司,天津 300459;
3)中国石油西南油气田分公司川中油气矿,四川遂宁 629000
Author(s):
 Jiang Yun1 Yang Xianyou1 Li Yue2 Shi Yang1 Xu Guoqing1 and Yu Yue3
 

1) Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, P.

R. China
2) CNOOC(China)Co. Ltd. Tianjin Branch, Tianjin 300450, P. R. China
3) Chuanzhong Division of PetroChina Southwest Oil & Gas Field Company, Suining 629000,

Sichuan Province, P. R. China

关键词:
 水锁伤害气相相对渗透率水锁指数水锁影响因素耐高温复配表面活性剂解除水锁
Keywords:
 water lock index relative gas permeability water lock index sensitivity

analysis thermo-stable composite surfactant system cleanup of water block

文献标志码:
A
摘要:
 大北-克深区块致密砂岩储层易发生水锁伤害,降低气井产能.为研究目标区块水损伤害机理并采取

相应防治措施,基于气相相对渗透率建立水锁指数(water block index, WBI),分析水锁伤害程度及其影

响因素,优选耐高温表面活性剂体系防治水锁伤害.结果表明,目标区块岩心水锁伤害程度属强水锁型(平

均WBI为69.8%),基质渗透率、驱替压力均与 WBI呈负相关,含水饱和度、黏土矿物含量、流体黏度和表面

张力均与WBI呈正相关,优选耐温优选复配表面活性剂体系JY-2(由质量分数为0.05%的FC-25和质量分数为

15%的甲醇组成)和JY-3(由质量分数为0.5%的HSC-25和质量分数为15%的甲醇组成),JY-3效果最好,可将

目标区块岩心水锁指数 WBI从66.2%降至28.4%,达到解除水锁伤害目的.

Abstract:
 

Water block damage is likely to occur in tight gas reservoirs of Dabei-Keshen area

and decreases production of gas wells. In order to investigate the mechanism of water block

and put forward corresponding measures, water block index (WBI) is developed to appraise the

damage degree of water block based on relative gas permeability and composite surfactant

systems are optimized to clean up water block through interfacial tension tests, wettability

tests and spontaneous imbibition. The average WBI for core samples from the targeted zone is

69.8%, belonging to the type of strong water block. Sensitivity analysis shows matrix

permeability and displacement pressure are in negative correlation with WBI, while water

saturation, content of clays, fluid viscosity and interfacial tension are in positive

correlation with WBI. Thermo-stable surfactant systems JY-2(0.05% FS-31+15% methanol) and JY-

3(0.5% HSC-25+15% methanol) are firstly optimized. JY-3 works best to reduce WBI from 66.2% to

less than 30.4%. Surfactant in the composite system contributes to reducing interfacial

tension and altering wettability, and methanol is benefit for reducing water saturation

through accelerating evaporation in a short time. The synergy promotes the cleanup process of

water block. Based on the study of mechanism of water block and numerous experimental data, we

are able to provide reference for economic and efficient development of gas fields.

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更新日期/Last Update: 2017-10-09