In order to work out the accurate amount of adsorbed gas in the highly evolved shale formation with rich organic matters, a new method was proposed to calculate the amount of adsorbed gas with different adsorption media considering formation water content after conducting isothermal methane adsorption and scanning electron microscopy experiments on highly evolved marine shale samples with rich organic matters from Longmaxi Formation, Southern Sichuan. Through the correction of organic matter adsorption fraction, the total amount of adsorbed gas on all pore surfaces of shale under stratigraphic conditions was converted into the amount of gas adsorbed by organic matters only on the organic matter pore surface. The results of the study show that the gas content calculated from the corrected amount of gas adsorbed by organic matters was basically consistent with the measured gas content on site. With the increase of organic matter content, the difference between the amount of gas adsorbed by organic matters and the total adsorbed gas amount of shale was decreased gradually, indicating that the corrected amount of gas absorbed by organic matters conforms to the actual methane adsorption model of the highly evolved shale formations with rich organic matters under stratigraphic conditions. This method can provide a basis for the calculation of adsorbed gas amount under the stratigraphic conditions of shale reservoirs.
Gao Wenlu
,
Zhou Wen
,
Xu Hao
,
Zhou Qiumei
,
Tang Chao
,
Liu Ruiyin
,
Jiang Ke
. A New Method for Calculating Adsorbed Gas Amount in Highly Evolved Shale Formations with Rich Organic Matters[J]. Special Oil & Gas Reservoirs, 2023
, 30(2)
: 71
-77
.
DOI: 10.3969/j.issn.1006-6535.2023.02.010
[1] 张金川,聂海宽,徐波,等.四川盆地页岩气成藏地质条件[J] .天然气工业,2008,28(2):151-156.
ZHANG Jinchuan,NIE Haikuan,XU Bo,et al.Geological condition of shale gas accumulation in Sichuan Basin[J].Natural Gas Industry,2008,28(2):151-156.
[2] 梁洪彬,向祖平,肖前华,等.页岩气吸附模型对比分析与应用[J] .大庆石油地质与开发,2017,36(6):159-167.
LIANG Hongbin,XIANG Zuping,XIAO Qianhua,et al.Compar
ative analysis and application of the shale gas absorbing model[J].Petroleum Geology & Oilfield Development in Daqing,2017,36(6):159-167.
[3] 董银涛,鞠斌山,刘楠楠.页岩甲烷高压等温吸附模型评价与改进[J] .煤炭学报,2020,45(9):3208-3218.
DONG Yintao,JU Binshan,LIU Nannan.Evaluation and improvement of high-pressure isothermal adsorption model for methane in shale[J].Journal of China Coal Society,2020,45(9):3208-3218.
[4] 李武广,杨胜来,徐晶,等.考虑地层温度和压力的页岩吸附气含量计算新模型[J] .天然气地球科学,2012,23(4):791-796.
LI Wuguang,YANG Shenglai,XU Jing,et al.A new model for shale adsorptive gas amount under a certain geological conditions of temperature and pressure[J].Natural Gas Geoscience,2012,23(4):791-796.
[5] ROSS D J K,BUSTIN R M.Shale gas potential of the lower Jurassic Gordondale Member,northeastern British Columbia,Canada[J].Bulletin of Canadian Petroleum Geology,2007,55(1):51-75.
[6] LU X,LI F,WATSON A T.Adsorption studies of natural gas storage in devonian shales[J].SPE Formation Evaluation,1995,10(2):109-113.
[7] 齐荣荣.页岩气多组分竞争吸附机理研究[D] .北京:中国石油大学(北京),2019.
QI Rongrong.Research on multi-component competitive adsorption mechanism of shale gas[D].Beijing:China University of Petroleum(Beijing),2019.
[8] 赵玉集,郭为,熊伟,等.页岩等温吸附/解吸影响因素研究[J] .天然气地球科学,2014,25(6):940-946.
ZHAO Yuji,GUO Wei,XIONG Wei,et al.Study of impact factors on shale gas adsorption and desorption[J].Natural Gas Geoscience,2014,25(6):940-946.
[9] 侯宇光,何生,易积正,等.页岩孔隙结构对甲烷吸附能力的影响[J] .石油勘探与开发,2014,41(2):248-256.
HOU Yuguang,HE Sheng,YI Jizheng,et al.Effect of pore structure on methane sorption capacity of shales[J].Petroleum Exploration and Development,2014,41(2):248-256.
[10] 孙健.黔北地区浅层龙马溪组页岩含气性及其控制因素[D].广州:中国科学院广州地球化学研究所,2020.
SUN Jian.Gas-bearing properties of shallow Longmaxi Formation shale in Qianbei area and its controlling factors[D].Guangzhou: Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,2020.
[11] 邹才能,杨智,孙莎莎,等.“近源找油”:论四川盆地页岩油气[J] .中国科学:地球科学,2020,50(7):903-920.
ZOU Caineng,YANG Zhi,SUN shasha,et al.“Exploring petroleum inside source kitchen”:shale oil and gas in Sichuan Basin[J].Science in China:Journal of Earth Science,2020,50(7):903-920.
[12] 周文,王浩,谢润成,等.中上扬子地区下古生界海相页岩气储层特征及勘探潜力[J] .成都理工大学学报(自然科学版),2013,40(5):569-576.
ZHOU Wen,WANG Hao,XIE Runcheng,et al.Characteristics and exploration potential of Lower Paleozoic marine shale gas reservoir in Middle-Upper Yangtze Area,China[J].Journal of Chengdu University of Technology(Science & Technology Edition),2013,40(5):569-576.
[13] 董大忠,施振生,管全中,等.四川盆地五峰组—龙马溪组页岩气勘探进展、挑战与前景[J] .天然气工业,2018,38(4):67-76.
DONG Dazhong,SHI Zhensheng,GUAN Quanzhong,et al.Progr
ess,challenges and prospects of shale gas exploration in the Wufeng-Longmaxi Reservoirs in the Sichuan Basin[J].Natural Gas Industry,2018,38(4):67-76.
[14] 寇雨,周文,赵毅楠,等.鄂尔多斯盆地长7油层组页岩吸附特征与类型及吸附气量影响因素[J] .岩性油气藏,2016,28(6):52-57.
KOU Yu,ZHOU Wen,ZHAO Yi'nan,et al.Adsorption characteristics,types and influencing factors of Chang7 shale of Triassic Yanchang Formation in Ordos Basin[J].Lithologic Reservoirs,2016,28(6):52-57.
