Special Oil & Gas Reservoirs >

2022 , Vol. 29 >Issue 1: 66 - 72

DOI: https://doi.org/10.3969/j.issn.1006-6535.2022.01.010

Reservoir Engineering

Experimental Study on Variation Pattern of Enhanced Permeability of Supercritical CO2 in Shale Reservoirs

  • Wu Di ,
  • Geng Yanyan ,
  • Xiao Xiaochun ,
  • Miao Feng ,
  • Zhai Wenbo
Expand
  • Liaoning Technical University, Fuxin, Liaoning 123000, China

Received date: 2021-01-18

  Revised date: 2021-11-20

  Online published: 2023-01-10

Fold

Abstract

In order to study the effect of supercritical CO2 on the enhanced permeability of shale reservoirs, a study was performed on the permeability enhancement pattern of supercritical CO2 injection into shale reservoirs with the self-developed rock triaxial seepage experimental device. The results of the study showed that the CH4 permeability of shale reservoirs varied negatively exponentially with increasing pore pressure, and the permeability was significantly enhanced after supercritical CO2 injection into shale samples; taking sample 3 as an example, the CH4 permeability could be increased by 103.98% at a maximum; the enhanced permeability of supercritical CO2 at injection pressure of 9.0 MPa was better than that at 8.0 MPa under the condition of constant temperature; as the injection pressure of supercritical CO2 gradually increased to 10.0 MPa, the shale started to fracture; when the test temperature was 35 to 55 ℃, the enhanced permeability of supercritical CO2 in shale was decreased with temperature raise, and the wave velocity attenuation rate and the porosity were decreased by 0.15 percentage points and 0.90 percentage points with temperature raise, respectively, showing a linear decreasing relationship between wave velocity attenuation rate and temperature. The study results provide a theoretical basis for enhancing the permeability of shale gas reservoirs during the development of supercritical CO2-enhanced shale gas.

Key words： shale gas; supercritical CO2; enhanced permeability; temperature; wave velocity attenuation rate

Cite this article

Wu Di , Geng Yanyan , Xiao Xiaochun , Miao Feng , Zhai Wenbo . Experimental Study on Variation Pattern of Enhanced Permeability of Supercritical CO2 in Shale Reservoirs[J]. Special Oil & Gas Reservoirs, 2022 , 29(1) : 66 -72 . DOI: 10.3969/j.issn.1006-6535.2022.01.010

References

[1] 李新景,胡素云,程克明.北美裂缝性页岩气勘探开发的启示[J].石油勘探与开发,2007,34(4):392-400.
LI Xinjing,HU Suyun,CHENG Keming.Suggestions from the development of fractured shale gas in North America[J].Petroleum Exploration and Development,2007,34(4):392-400.
[2] 张东晓,杨婷云.页岩气开发综述[J].石油学报,2013,34(4):792-801.
ZHANG Dongxiao,YANG Tingyun.An overview of shale-gas production[J].Acta Petrolei Sinica,2013,34(4):792-801.
[3] 端详刚,胡志明,彭辉,等.页岩气开采模拟实验方法研究[J].天然气与石油,2019,37(2):73-78.
DUAN Xianggang,HU Zhiming,PENG Hui,et al.Research on simulation experiment method of shale gas production[J].Natural Gas and Oil,2019,37(2):73-78.
[4] SUN Z,SHI J,WU K,et al.Gas flow behavior through inorganic nanopores in shale considering confinement effect and moisture content[J].Industrial & Engineering Chemistry Research,2018,57(9):3430-3440.
[5] 汤积仁,卢义玉,陈钰婷,等.超临界CO2作用下页岩力学特性损伤的试验研究[J].岩土力学,2018,39(3):797-802.
TANG Jiren,LU Yiyu,CHEN Yuting,et al.Experimental study of damage of shale mechanical properties under supercritical CO2[J].Rock and Soil Mechanics,2018,39(3):797-802.
[6] GAN Q,ELSWORTH D,ALPERN J S,et al.Breakdown pressures due to infiltration and exclusion in finite length boreholes[J].Journal of Petroleum Science & Engineering,2015,127:329-337.
[7] XIE H,LI X,FANG Z,et al.Carbon geological utilization and storage in China:current status and perspectives[J].Acta Geotechnica,2014,9(1):7-27.
[8] 张登峰,李超,李艳红,等.封存过程中CO2流体与煤中矿物作用关系研究进展[J].安全与环境学报,2020,20(1):297-309.
ZHANG Dengfeng,LI Chao,LI Yanhong,et al.Research review on the interaction of CO2 fluid with the minerals in the process of CO2 sequestration in coal seams[J].Journal of Safety and Environment,2020,20(1):297-309.
[9] KIZAKI A,TANAKA H,SAKAGUCHI K.Hydraulic fracturing in Inada Granite and Ogino Tuff using super critical carbon dioxide and water as fracturing fluids[J].Journal of Mmij,2013,129:461-466
[10] ISHIDA T,AOYAGI K,NIWA T,et al.Acoustic emission monitoring of hydraulic fracturing laboratory experiment with supercritical and liquid CO2[J].Geophysics Research Letters,2012,39(3):1-6.
[11] 吉佳豪.页岩在CO2作用下的三轴压缩实验研究[D].成都:西南石油大学,2018.
JI Jiahao.Experimental study of triaxial compression by CO2 migration on shale[D].Chengdu:Southwest Petroleum University,2018.
[12] 刘国军,鲜学福,周军平,等.超临界CO2致裂页岩实验研究[J].煤炭学报,2017,42(3):694-701.
LIU Guojun,XIAN Xuefu,ZHOU Junping,et al.Experimental study on the supercritical CO2 fracturing of shale[J].Journal of China Coal Society,2017,42(3):694-701.
[13] 岳立新,孙可明,郝志勇.低渗透煤层注超临界CO2增透微观机理研究[J].煤炭科学技术,2016,44(12):85-90,117.
YUE Lixin,SUN Keming,HAO Zhiyong.Study on micro-mechanism of permeability improvement with supercritical CO2 injection in low permeability seam[J].Coal Science and Technology,2016,44(12):85-90,117.
[14] YIN G,DENG B,LI M,et al.Impact of injection pressure on CO2-enhanced coalbed methane recovery considering mass transfer between coal fracture and matrix[J].Fuel,2017,196(15):288-297.
[15] 吴迪,王翰阳,苗丰,等.超临界CO2作用下CO2渗流特性与煤层增透效果研究[J].煤炭科学技术,2020,48(10):90-96.
WU Di,WANG Hanyang,MIAO Feng,et al.Seepage characteristics and permeability enhancement effect of coal seam under supercritical CO2 condition[J].Coal Science and Technology,2020,48(10):90-96.
[16] TRIMMER D A.Design criteria for laboratory measurements of low permeability rocks[J].Geophysical Research Letters,1981,8(9):973-975.
[17] JIANG Y,LUO Y,LU Y,et al.Effects of supercritical CO2,treatment time,pressure,and temperature on microstructure of shale[J].Energy,2016,97(15):173-181.
[18] 卢义玉,廖引,汤积仁,等.页岩超临界CO2压裂起裂压力与裂缝形态试验研究[J].煤炭学报,2018,43(1):175-180.
LU Yiyu,LIAO Yin,TANG Jiren,et al.Experimental study on fracture initiation pressure and morphology in shale using supercritical CO2 fracturing[J].Journal of China Coal Society,2018,43(1):175-180.
[19] 郝振良,马捷,王明育.热应力作用下的有效压力对多孔介质渗透系数的影响[J].水动力学研究与进展(A辑),2003,18(6):792-796.
HAO Zhenliang,MA Jie,WANG Mingyu.Influence of effective stress on the coefficient of permeability of porous medium under thermal stress[J].Journal of Hydrodynamics(SeR.A),2003,18(6):792-796.
[20] 邓佳,张奇,王栋,等.压力驱动条件下页岩微纳米孔隙CO2/CH4竞争吸附特性[J].东北石油大学学报,2021,45(5):109-116.
DENG Jia,ZHANG Qi,WANG Dong,et al.Competitive adsorption characteristics of CO2/CH4 in micro-nano pores by pressure-driven for shale reservoir[J].Journal of Northeast Petroleum University,2021,45(5):109-116.
[21] 刘经纬,黄亮,仲学哲,等.超临界CO2对稠油物理化学性质影响实验[J].石油地质与工程,2020,34(4):84-89.
LIU Jingwei,HUANG Liang,ZHONG Xuezhe,et al.Experimental study on the effect of supercritical CO2 on the physicochemical properties of heavy oil[J].Petroleum Geology & Engineering,2020,34(4):84-89.
[22] 李和万,王来贵,张豪,等.循环冷加载条件下受载煤样结构损伤规律[J].煤炭学报,2017,42(9):2345-2352.
LI Hewan,WANG Laigui,ZHANG Hao,et al.Investigation on damage laws of loading coal samples under cyclic cooling treatment[J].Journal of China Coal Society,2017,42(9):2345-2352.
Options
Outlines

/

〈 〉