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

doi:10.3969/j.issn.1006-6535.2021.06.020

特种油气藏 >

2021 , Vol. 28 >Issue 6: 151 - 157

DOI: https://doi.org/10.3969/j.issn.1006-6535.2021.06.020

钻采工程

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

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长江大学,湖北武汉 430100

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。

收稿日期: 2020-10-20

修回日期: 2021-08-02

网络出版日期: 2022-02-16

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)

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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

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Yangtze University, Wuhan, Hubei 430100, China

Received date: 2020-10-20

Revised date: 2021-08-02

Online published: 2022-02-16

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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

本文引用格式

王杰 , 付美龙 , 鲜若琨 , 张志远 , 陈立峰 . 稠油油藏高温多基团交联冻胶封窜体系研究与应用[J]. 特种油气藏, 2021 , 28(6) : 151 -157 . DOI: 10.3969/j.issn.1006-6535.2021.06.020

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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