玛湖砂砾岩致密油藏水平井CO<sub>2</sub>吞吐现场试验效果分析

施雷庭; 张玉龙; 叶仲斌; 张景; 王英伟; 王睿麒; 吴思彤

• 矿场应用 • | 浏览量 : 0 下载量: 0 CSCD: 0 CNKI被引量: 24 Scopus: 0 更多指标

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玛湖砂砾岩致密油藏水平井CO₂吞吐现场试验效果分析
Field test effect analysis of CO₂ huff and puff for EOR of horizontal wells in tight glutenite reservoir of Mahu Oilfield
2021年11卷第6期页码：871-877
纸质出版：2021
DOI：
稿件说明：

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施雷庭, 张玉龙, 叶仲斌, 等. 玛湖砂砾岩致密油藏水平井CO₂吞吐现场试验效果分析[J]. 油气藏评价与开发, 2021,11(6):871-877. DOI：

SHI Leiting, ZHANG Yulong, YE Zhongbin, et al. Field test effect analysis of CO₂ huff and puff for EOR of horizontal wells in tight glutenite reservoir of Mahu Oilfield[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(6): 871-877. DOI：

摘要

新疆玛湖砂砾岩致密油藏孔隙度和渗透率极低

压裂投产后前期稳产效果较好

后期递减较大

为补充地层能量提高原油采收率

先后在玛131井区开展3口水平井CO

吞吐试验。试验结果表明：CO

吞吐提高原油采收率机理主要体现在增加储层能量、膨胀原油体积、降低原油黏度、萃取轻质组分、溶蚀储层矿物、增加流体流动能力等方面。合理的注入参数更有助于提高原油采收率

在进行CO

吞吐开发时井底注入流压越高

焖井时间越长

波及扩散越充分

连续见油时间越早

提高采收率越明显。3口水平井X721、X92、M1114增油量分别为2 161 t

1 768 t

1 452 t

吞吐在砂砾岩致密油藏中具有较好的适应性及推广应用前景。

Abstract

The porosity and permeability of Mahu sandy conglomerate tight reservoir in Xinjiang are extremely low. After fracturing and putting into production

the stable production effect of early development is good

and the decline is large in the later stage. In order to supply the formation energy and improve the crude oil recovery

the tests of CO

huff and puff for three horizontal wells have been carried out in Ma131 well area. The test results show that the mechanism of CO

huff and puff to improve crude oil recovery is mainly reflected in increasing reservoir energy

expanding crude oil volume

reducing crude oil viscosity

extracting light compo

nents

dissolving reservoir minerals and increasing fluid flow capacity. Reasonable injection parameters are more helpful to enhanced oil recovery. During the development of CO

huff and puff

the higher bottomhole injection pressure and the longer soaking time

as well as greater sweep diffusion

result in earlier continuous oil production and more obvious enhanced oil recovery effect. The oil increment of three horizontal wells

Well-X721

Well-X92 and Well-M1114

is 2 161 t

1 768 t and 1 452 t

respectively. CO

huff and puff has good adaptability and popularization and application prospect in sandy conglomerate tight reservoir.