The effect of injection pressure on the microscopic migration characteristics by CO2 flooding in heavy oil reservoirs

被引：5

作者：

Zhu, Weiyao ^{[1
]}

Ma, Qipeng ^{[1
]}

Song, Zhiyong ^{[1
]}

Lin, Jisheng ^{[2
]}

Li, Ming ^{[2
]}

Li, Bingbing ^{[1
]}

机构：

[1] Univ Sci & Technol, Sch Civil & Recourse Engn, Beijing, Peoples R China

[2] Shengli Oil Field Ltd Co, SinoPEC, Oil Prod Res Inst, Dongying, Peoples R China

来源：

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS | 2022年 / 44卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Injection pressure; heavy oil; CO2; flooding; microscopic migration characteristics; oil recovery; CRUDE-OIL; ASPHALTENE PRECIPITATION; RECOVERY; DEPOSITION; MECHANISMS; SANDSTONE;

D O I：

10.1080/15567036.2019.1644399

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

In heavy oil reservoir, the variations of injection pressures induce asphaltene precipitation by CO2 flooding, which causes a reduction in recovery. This paper investigated the microscopic migration characteristics by CO2 flooding at different injection pressures. The results showed that the migration was unobstructed, whereas the spread scope was relatively small at 2 MPa. In case of 8 MPa, there was a mixed area of oil-gas and precipitated asphaltene. A large number of asphaltene precipitations appeared, which inhibited the migration of CO2 at 10 MPa. Additionally, the maximum recovery under 8 MPa was 58.2%, followed by 10 MPa and 2 MPa, respectively.

引用

页码：1459 / 1467

页数：9

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