大庆油田四次采油凝胶颗粒+聚合物驱技术研究

陈文林

doi:10.3969/j.issn.1006-6535.2020.05.016

特种油气藏 >

2020 , Vol. 27 >Issue 5: 106 - 112

DOI: https://doi.org/10.3969/j.issn.1006-6535.2020.05.016

油藏工程

大庆油田四次采油凝胶颗粒+聚合物驱技术研究

陈文林

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中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆 163712

陈文林(1987—),男,工程师,2009年毕业于大庆石油学院石油工程专业,2012年毕业于东北石油大学油气田开发专业,获硕士学位,现主要从事提高原油采收率技术研究工作。

收稿日期: 2019-11-18

修回日期: 2020-06-28

网络出版日期: 2022-02-18

基金资助

中国石油重大科技专项“化学驱后提高采收率技术研究与试验”(2016E-0207)

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Research on Gel Particles + Polymer Flooding Technology for Quaternary Oil Recovery in Daqing Oilfield

Chen Wenlin

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E& R Research Insitute of Daqing Oilfield Co., Ltd., CNPC, Daqing, Heilongjian 163712, China

Received date: 2019-11-18

Revised date: 2020-06-28

Online published: 2022-02-18

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摘要

针对大庆油田聚合物驱后油层优势渗流通道发育,层间、层内、平面三大矛盾加剧,而高浓度聚合物驱用量大,但经济效益较差的问题,自主研发PPG凝胶颗粒,攻关了PPG+聚合物驱技术,实现了“堵、调、驱”有机结合。采用仪器检测和物理模拟实验等方法,分析PPG+聚合物体系渗流特性、驱油效果,筛选出最佳体系配方及注入方式。研究结果表明:调驱型PPG具备增黏特性,调驱型PPG+聚合物体系90 d黏度保留率高达78.9%;与单纯聚合物溶液相比,PPG+聚合物体系黏弹性显著增加,具备更强的调堵能力;聚合物驱后先注入0.05倍孔隙体积封堵型PPG+聚合物体系,再注入0.70倍孔隙体积调驱型PPG+聚合物体系可取得最佳驱油效果,可节省24%聚合物用量。预测研究区采用PPG+聚合物驱后可提高采收率8.57个百分点。该研究可为大庆油田四次采油阶段持续高效开发提供技术支撑。

关键词： 四次采油; PPG+聚合物体系; 黏弹性; 调驱; 大庆油田

本文引用格式

陈文林 . 大庆油田四次采油凝胶颗粒+聚合物驱技术研究[J]. 特种油气藏, 2020 , 27(5) : 106 -112 . DOI: 10.3969/j.issn.1006-6535.2020.05.016

Abstract

After polymer flooding in Daqing Oilfield, the dominate seepage channels were very developed in the reservoir, the three major interferences, that is interlayer interference, inner layer interference and plane interference, intensified, the consumption of high-concentration polymer for flooding grew, and the economic benefits declined. In view of these problems, PPG gel particles were developed independently, and the PPG+polymer flooding technology were established, realizing the organic combination of "plugging, adjusting and flooding". Through experimental methods such as instrument detection and physical simulation, etc., the seepage characteristics and oil displacement effect of PPG+polymer system were analyzed, and the optimal system formula and injection pattern were screened. The research results show that: PPG for flooding control can increase viscosity, and viscosity retention rate of PPG+polymer system for flooding is as high as 78.9% after 90 days. Compared with pure polymer solution, the viscoelasticity of PPG+polymer system increases significantly, and the system has stronger plugging control properties. The optimal flooding effect can be achieved by firstly injecting PPG+polymer for plugging control with 0.05 PV and then injecting PPG+polymer for flooding control with 0.70 PV, which can save polymer consumption by 24%. After implementing PPG+polymer system for flooding control to the blocks for research and prediction, the recovery rate has increased by 8.57 percentage points. The research can provide technical support for continuous and efficient development of quaternary oil recovery stage.

Key words： quaternary oil recovery; PPG+polymer system; viscoelasticity; flooding control; Daqing Oilfield

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