临兴区块致密气储层压裂损害影响因素

doi:10.3969/j.issn.1006-6535.2022.01.021

特种油气藏 ›› 2022, Vol. 29 ›› Issue (1): 141-146.DOI: 10.3969/j.issn.1006-6535.2022.01.021

临兴区块致密气储层压裂损害影响因素

余翠沛¹, 张滨海², 李紫晗², 黄晶², 董子标¹, 岳前升¹

1.长江大学,湖北荆州 434023;
2.中海油研究总院有限责任公司,北京 100010

收稿日期:2021-05-31 修回日期:2021-11-15 出版日期:2022-02-25 发布日期:2023-01-10
通讯作者: 岳前升(1973—),男,教授,1996年毕业于江汉石油学院石油地质专业,2009年毕业于武汉理工大学材料专业,获博士学位,现从事油气田应用化学方面研究工作。
作者简介:余翠沛(1994—),女,2018年毕业于重庆第二师范学院应用化学专业,现为长江大学应用化学专业在读硕士研究生,主要从事油气田应用化学方面研究工作。
基金资助:
中海油“十三五”科技重大专项“鄂尔多斯盆地东缘致密气开发钻完井关键技术研究与应用”(YXKY-2018-FCG)

On Factors Influencing Fracture Damage in Tight Gas Reservoirs, Linxing Block

Yu Cuipei¹, Zhang Binhai², Li Zihan², Huang Jing², Dong Zibiao¹, Yue Qiansheng¹

1. Yangtze University, Jingzhou, Hubei 434023, China;
2. Beijing Research Center, CNOOC (China) Co., Ltd., Beijing 100010, China

Received:2021-05-31 Revised:2021-11-15 Online:2022-02-25 Published:2023-01-10

摘要/Abstract

摘要： 为明确临兴区块致密气储层压裂损害影响因素,以储层岩心渗透率损害率为评价指标开展室内实验,分析储层敏感性、水锁效应、胍胶压裂液破胶残液和残渣含量对储层的损害程度。结果表明:储层具有中等偏弱水敏,弱—中等偏弱程度酸敏和碱敏;储层水锁指数为85%～100%,损害程度为强—极强;当使用单一过硫酸铵作为破胶剂,温度低于30 ℃时破胶黏度较大,对储层损害程度较强;压裂液残渣对储层渗透率损害率较低。临兴致密气压裂储层损害因素的损害程度由大到小依次为水锁损害、破胶残液损害、储层敏感性损害、压裂液残渣损害。该研究对临兴致密气压裂液体系和储层保护措施选择具有指导意义。

关键词: 致密砂岩气, 胍胶压裂液, 储层损害, 水锁, 破胶, 临兴区块

Abstract: In order to identify the factors influencing the fracturing damage in tight gas reservoirs, Linxing block, laboratory experiments were performed with core permeability damage rate as an evaluation index to analyze the damage of reservoir sensitivity, water block effect, guar gum fracturing fluid residue after gel breaking and residue content to the reservoirs. The results showed that the reservoirs were moderately to weakly water-sensitive, and weakly to moderately weakly acid-sensitive and alkali-sensitive; the reservoir water block index was 85% to 100%, and the damage was strong to extremely strong; when single ammonium persulfate is used as gel breaker, the gel breaking viscosity was high at a temperature of lower than 30 ℃ and the damage to reservoirs was strong; the damage rate of fracturing fluid residue to reservoir permeability was low. The extent of damage to Linxing fractured tight gas reservoir in descending order was water block damage, fracturing fluid residue damage after gel breaking, reservoir sensitivity damage, and fracturing fluid residue damage. This study plays a guiding role in the selection of fracturing fluid systems and reservoir protection measures for Linxing tight gas reservoirs.

Key words: tight sandstone gas, guar gum fracturing fluid, reservoir damage, water block, gel breaking, Linxing Block

中图分类号:

TE357

余翠沛, 张滨海, 李紫晗, 黄晶, 董子标, 岳前升. 临兴区块致密气储层压裂损害影响因素[J]. 特种油气藏, 2022, 29(1): 141-146.

Yu Cuipei, Zhang Binhai, Li Zihan, Huang Jing, Dong Zibiao, Yue Qiansheng. On Factors Influencing Fracture Damage in Tight Gas Reservoirs, Linxing Block[J]. Special Oil & Gas Reservoirs, 2022, 29(1): 141-146.

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临兴区块致密气储层压裂损害影响因素

On Factors Influencing Fracture Damage in Tight Gas Reservoirs, Linxing Block

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