特种油气藏 ›› 2021, Vol. 28 ›› Issue (6): 151-157.DOI: 10.3969/j.issn.1006-6535.2021.06.020

• 钻采工程 • 上一篇    下一篇

稠油油藏高温多基团交联冻胶封窜体系研究与应用

王杰, 付美龙, 鲜若琨, 张志远, 陈立峰   

  1. 长江大学,湖北 武汉 430100
  • 收稿日期:2020-10-20 修回日期:2021-08-02 出版日期:2021-12-25 发布日期:2022-02-16
  • 通讯作者: 付美龙(1967—),男,教授,博士生导师,1990年毕业于西南石油学院应用化学专业,2009年毕业于西南石油大学应用化学专业,获博士学位,现主要从事油田化学和提高原油采收率方面的教学和科研工作。
  • 作者简介:王杰(1997—),男,2019年毕业于长江大学石油工程专业,现为该校油气田开发专业在读硕士研究生,从事提高油田采收率方面的研究工作。
  • 基金资助:
    国家科技重大专项“缝洞型油藏碳酸盐岩选择性堵剂研究”(2016ZX05014-005-006)

Study and Application of High-temperature Channeling Blocking System Based on Multi-group Cross Linked Gel for Heavy Oil Reservoirs

Wang Jie, Fu Meilong, Xian Ruokun, Zhang Zhiyuan, Chen Lifeng   

  1. Yangtze University, Wuhan, Hubei 430100, China
  • Received:2020-10-20 Revised:2021-08-02 Online:2021-12-25 Published:2022-02-16

摘要: 为解决蒸汽驱开发过程中汽窜严重问题,研制了一种高温多基团交联冻胶封窜体系,并针对其耐温性能、蒸汽封堵性能和耐冲刷性能进行了评价。研究表明:高温多基团交联冻胶封窜体系在130 ℃的高温环境下可以稳定成胶,且在250 ℃条件下放置120 d后凝胶具有很好的稳定性;封堵性能优良,在高温条件下,注入速度为1 mL/min、堵剂注入量为0.8倍孔隙体积时,冻胶封窜体系封堵率高达99.63%,突破压力梯度为7.35 MPa/m;250 ℃条件下,该封窜体系在填砂管内完全成胶后,经高温蒸汽冲刷(30倍孔隙体积)后封堵率一直维持在98.00%以上,耐冲刷性能良好。该封窜体系在现场应用中取得了良好的蒸汽封堵效果,有效解决了稠油油藏蒸汽驱开发过程中的汽窜问题,可为稠油油藏的高效开发提供技术支持。

关键词: 蒸汽驱, 汽窜, 冻胶体系, 耐高温, 封堵率, 稠油

Abstract: In order to address the serious problem of steam channeling in the reservoir development by steam flooding, a high-temperature channeling blocking system based on multi-group cross linked gel was developed. An evaluation was made on its temperature resistance, steam plugging capability, and erosion resistance. It was found in the study that the high-temperature channeling blocking system based on multi-group cross linked gel could stably generate gel under high temperature of 130 ℃, and the gel had a good stability after 120 d at 250 ℃, and excellent plugging performance; the plugging rate of the gel-based channeling blocking system was as high as 99.63% at high temperature when the injection speed was 1 mL/min and the plugging agent volume injected was 0.8 time the pore volume, and the breakthrough pressure gradient was 7.35 MPa/m; at 250 ℃, the channeling blocking system was completely gelling in the sand-filled pipe, and the plugging rate was maintained above 98% after high-temperature steam flushing (30 times the pore volume), with good flushing resistance. The channeling blocking system has proven to be highly effective in plugging with steam by on-site application, effectively solving the problem of steam channeling in the development with steam flooding of heavy oil reservoir, and it can provide a technical support for the efficient development of heavy oil reservoir.

Key words: steam flooding, steam channeling, gel system, high temperature resistance, plugging rate, heavy oil

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