深层页岩储层转向压裂用暂堵材料研究及应用

Research and application of deep shale reservoir diversion fracturing with temporary plugging materials

陈挺 ¹徐昊垠 ¹张源 ²张磊 ³于相东 ⁴李国良⁴

扫码查看

作者信息

1. 中国石油渤海钻探工程有限公司工程技术研究院,天津 300280
2. 中国石油西南油气田开发事业部长宁联合项目部,四川成都 610011
3. 中国石油渤海钻探工程有限公司井下技服分公司,天津 300280
4. 中国石油渤海钻探工程有限公司油气合作开发分公司,天津 300280
折叠

摘要

国内页岩气的开发逐步转向深层、超深层储层,对暂堵材料的耐温性能、耐压差性能提出了更高的要求.研发了一种耐高温、耐大压差、易降解的暂堵材料.实验结果表明:在聚丙烯酰胺分子链中引入刚性基团N-乙烯基吡咯烷酮(NVP)和多元丙烯酸酯,当摩尔比NVP∶DPHA∶AM=1∶1∶100 时,产物具备良好的吸水膨胀性能和降解性能.耐温达到150℃,耐压差达到 40 MPa,降解时间＜8.5 h.现场试验结果表明,采取复合暂堵的方式能够提高施工压力 3.5～5.6 MPa,提高了人工裂缝的复杂程度.

Abstract

The development of shale gas in China has gradually shifted to deep and ultra-deep reservoirs,which puts forward higher requirements for the temperature resistance and differential pressure resistance of temporary plugging materials.A kind of temporary plugging material which is resistant to high temperature,large pressure difference and easy degrada-tion was developed.The experimental results showed that the rigid group N-vinylpyrroli-done(NVP)and polyacrylate are introduced into the polyacrylamide molecular chain,when the molar ratio of NVP∶DPHA∶AM=1∶1∶100,the product had good water absorption expan-sion and degradation proper ties.Temperature resistance was 150℃,differential pressure resistance was 40 MPa and the degradation time was less than 8.5 h.Field test results showed that the compound temporary plugging method can increase the construction pressure of 3.5～5.6 MPa and improve the complexity of artificial fracture.

关键词

深层/页岩储层/暂堵/耐温/耐压/可降解

Key words

deep layer/shale reservoir/temporary plugging/temperature resistance/pressure resistance/degradable

引用本文复制引用

出版年

2024

石油化工应用

宁夏化工学会

石油化工应用

影响因子：0.276

ISSN：1673-5285

段落导航