Effects of supercritical CO<sub>2</sub> immersion on permeability of sandy conglomerate reservoir with different clay mineral content in Mahu

WANG Yingwei; WU Shunwei; QIN Jianhua; YE Yiping; GAO Yang; ZHANG Jing

doi:10.13809/j.cnki.cn32-1825/te.2021.06.006

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Effects of supercritical CO₂ immersion on permeability of sandy conglomerate reservoir with different clay mineral content in Mahu

更新时间：2025-12-11

- Effects of supercritical CO₂ immersion on permeability of sandy conglomerate reservoir with different clay mineral content in Mahu
- Petroleum Reservoir Evaluation and Development Vol. 11, Issue 6, Pages: 837-844(2021)
- 作者机构：
  
  1. 中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依 834000中国石油新疆油田分公司油藏评价处,新疆,克拉玛依,834000
  2. 中国石油新疆油田分公司油藏评价处,新疆,克拉玛依,834000
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2021.06.006
  CLC： TE357
- Published：2021
- 稿件说明：
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WANG Yingwei, WU Shunwei, QIN Jianhua, et al. Effects of supercritical CO₂ immersion on permeability of sandy conglomerate reservoir with different clay mineral content in Mahu[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(6): 837-844.
DOI：

WANG Yingwei, WU Shunwei, QIN Jianhua, et al. Effects of supercritical CO₂ immersion on permeability of sandy conglomerate reservoir with different clay mineral content in Mahu[J]. Petroleum Reservoir Evaluation and Development, 2021, 11(6): 837-844. DOI： 10.13809/j.cnki.cn32-1825/te.2021.06.006.

摘要

为明确新疆玛湖砂砾岩油藏储层条件下

超临界CO

浸泡对玛湖不同黏土矿物含量砂砾岩储层物性的影响规律。首先

根据现场储层岩心全岩X射线衍射（XRD）结果确定了储层黏土矿物类型及占比：高岭石（1.52 %）、蒙脱石（0.42 %）、绿泥石（0.73 %）、伊利石（0.68 %）;其次

制作了与储层岩心孔渗接近的人造岩心;最后

利用超临界CO

高温高压反应装置在储层温度70 ℃、压力20 MPa条件下

开展超临界CO

浸泡对玛湖不同黏土矿物含量砂砾岩储层渗透率影响的实验研究。结果表明：黏土矿物含量为2.5 %~6.0 %时

注入CO

后储层渗透率增加

黏土矿物含量越低

作用时间越短

渗透率增加越明显;当储层中黏土矿物含量大于7.5 %时

随着作用时间的增加

渗透率逐渐降低

且黏土矿物含量越高降幅越大;黏土矿物含量为6.0 %~7.0 %时

对储层渗透率改善效果最好。

Abstract

In order to clarify the influence of supercritical CO

immersion on the physical properties of glutenite reservoirs with different clay mineral content in Mahu under the conditions of Xinjiang Mahu glutenite reservoir. Several researches have been done. Firstly

the type and proportion of clay minerals in the reservoir were determined according to the results of X-ray diffraction （XRD）：kaolinite （1.52 %）

montmorillonite （0.42 %）

chlorite （0.73 %）

illite （0.68 %）. Secondly

the core which is close to the pore permeability of reservoir core is made ma

nually. Finally

under the condition of reservoir temperature at 70 ℃ and pressure of 20 MPa

using supercritical CO

high-temperature and high-pressure reaction device

and the experimental study on the influence of supercritical CO

immersion on the permeability of sandy conglomerate reservoir with different clay mineral content was carried out. The results show that when the clay mineral content is 2.5 % ~ 6.0 %

the permeability of the reservoir increases after the injection CO

the lower the clay mineral content

the shorter the action time and the more obvious the permeability increase. When the clay mineral content in the reservoir is greater than 7.5 %

with the increase of the action time

the permeability gradually decreases

and the higher the clay mineral content is

the greater the decrease is. When the clay mineral content is 6.0 % ~ 7.0 %

has the best effect on improving reservoir permeability.

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AI问答

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Effects of supercritical CO2 immersion on permeability of sandy conglomerate reservoir with different clay mineral content in Mahu

DOI：10.13809/j.cnki.cn32-1825/te.2021.06.006

摘要

Abstract

关键词

Keywords

references

Effects of supercritical CO₂ immersion on permeability of sandy conglomerate reservoir with different clay mineral content in Mahu