致密砂岩油藏能量补充方式评价及优化

李斌会; 苑盛旺; 董大鹏; 付兰清; 王瑞晗; 史晓东

doi:10.3969/j.issn.1006-6535.2021.06.012

特种油气藏 >

2021 , Vol. 28 >Issue 6: 91 - 97

DOI: https://doi.org/10.3969/j.issn.1006-6535.2021.06.012

油藏工程

致密砂岩油藏能量补充方式评价及优化

李斌会 ,
苑盛旺 ,
董大鹏 ,
付兰清 ,
王瑞晗 ,
史晓东

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1.中国石油大庆油田有限责任公司,黑龙江大庆 163712;
2.黑龙江省油层物理与渗流力学重点实验室,黑龙江大庆 163712

李斌会(1979—),男,高级工程师,2001年毕业于大庆石油学院石油工程专业,2020年毕业于中国石油大学(北京)油气田开发工程专业,获博士学位,现主要从事油气藏渗流力学研究与应用工作。

收稿日期: 2020-07-17

修回日期: 2021-09-29

网络出版日期: 2022-02-16

基金资助

国家科技重大专项“松辽盆地致密油开发示范工程”(2017ZX05071)

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Evaluation and Optimization of Energy Supplement Methods for Tight Sandstone Reservoirs

Li Binhui ,
Yuan Shengwang ,
Dong Dapeng ,
Fu Lanqing ,
Wang Ruihan ,
Shi Xiaodong

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1. PetroChina Daqing Oilfield Co., Ltd., Daqing, Heilongjiang 163712, China;
2. Heilongjiang Key Laboratory of Reservoir Physics and Percolation Mechanics, Daqing, Heilongjiang 163712, China

Received date: 2020-07-17

Revised date: 2021-09-29

Online published: 2022-02-16

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摘要

针对致密砂岩油藏大规模体积压裂开发后能量补充困难的问题,利用自主设计制作的大型人造三维岩心物理模型和物理模拟实验舱,开展致密砂岩油藏能量补充方式优化研究。实验结果表明:致密砂岩油藏压裂开发过程中,地层能量损耗严重,采取注水或注气的方式可有效进行能量补充;地层中裂缝规模越大,越有利于原油渗流,后续补充能量的传播范围越广,有助于进一步提高原油采收率;从提高驱油效率和扩大波及系数方面优选吞吐渗吸介质,CO₂均优于活性水,CO₂吞吐开发在矿场试验中取得了显著的增油效果,因此,CO₂吞吐作为一种有效的能量补充方式在致密油开发中展现了良好的应用前景。该文分析了致密砂岩储层水平井压裂开发的渗流规律,优选出致密砂岩储层大规模压裂开发后最佳渗吸介质,可为致密砂岩油藏开发设计提供重要的理论依据。

关键词： 致密砂岩; 能量补充方式; 驱油效率; 裂缝; CO₂吞吐; 活性水

本文引用格式

李斌会 , 苑盛旺 , 董大鹏 , 付兰清 , 王瑞晗 , 史晓东 . 致密砂岩油藏能量补充方式评价及优化[J]. 特种油气藏, 2021 , 28(6) : 91 -97 . DOI: 10.3969/j.issn.1006-6535.2021.06.012

Abstract

In view of the difficulties in energy supplement after large-scale fracturing by stimulated reservoir volume of tight sandstone reservoirs, a large artificial three-dimensional core physical model and a physical simulation lab module designed and manufactured by ourselves were used to study the optimization of the energy supplement methods for tight sandstone reservoirs. The experimental results showed that during the fracturing development of tight sandstone reservoirs, the formation energy was greatly lost and could be supplemented by water or gas injection effectively; the larger the fractures in the formation, the more conducive to crude oil seepage and the wider spreading scope of the subsequent supplemented energy, which was helpful to further improve the oil recovery; CO₂ was better than active water in terms of being used as imbibition medium which was selected in terms of improving flooding efficiency and the sweep efficiency; the CO₂ stimulation has achieved a significant oil recovery enhancement in the field test. Therefore, CO₂ stimulation, as an effective way of energy supplement, has a good application prospect in the development of tight oil reservoirs. In this paper, the seepage law of horizontal well fracturing in tight sandstone reservoirs was analyzed and the best imbibition medium after large-scale fracturing in tight sandstone reservoirs was preferably selected, providing an important theoretical basis for the development design of tight sandstone reservoirs.

Key words： tight sandstone; energy supplement mode; oil displacement efficiency; fracture; CO₂ stimulation; active water

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