Pore Structure and Sensitivity of Shale Reservoir in Lu 1 Member of Jimsar Sag

doi:10.7657/XJPG20210504

Abstract

Abstract:

In order to determine reservoir sensitivity of the shale in the first member of the Lucaogou formation (Lu 1 member for short) in Jimsar sag, we analyzed the pore structure and carried out physical simulation experiments on the reservoir sensitivity after understanding the reservoir mineral composition. The Lu 1 member reservoir belongs to terrigenous clastic deposits with complex mineral composition and rich clay minerals, most of which are swellable. The high content of brittle minerals and complex pore structures in the reservoir aggravated stress sensitive damage; the high content of swellable clay minerals increased water sensitive damage; the high contents of (iron) dolomite and clay minerals induced acid and alkali sensitive damage, but the high content of calcite slightly reduced acid sensitive damage. In conclusion, the Lu 1 member shale reservoir in the study area is moderately-strongly sensitive to stress and water, weakly-strongly sensitive to acid and weakly-approximately moderately sensitive to alkali. Reservoir sensitivity damages from acid, water and stress should be prevented in oilfield development.

Key words: Jimsar sag, Lucaogou formation, shale reservoir, pore structure, stress sensitivity, water sensitivity, acid sensitivity, alkali

CLC Number:

TE122.221

LI Jingjing, SUN Guoxiang, LIU Qi, LIU Miao. Pore Structure and Sensitivity of Shale Reservoir in Lu 1 Member of Jimsar Sag[J]. Xinjiang Petroleum Geology, 2021, 42(5): 541-547.

Figures/Tables 9

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References 21

[1]	霍进, 何吉祥, 高阳, 等. 吉木萨尔凹陷芦草沟组页岩油开发难点及对策[J]. 新疆石油地质, 2019, 40(4):379-388.
	HUO Jin, HE Jixiang, GAO Yang, et al. Difficulties and countermeasures of shale oil development in Lucaogou formation of Jimsar sag[J]. Xinjiang Petroleum Geology, 2019, 40(4):379-388.
[2]	KATZ B, LIN Fang. Lacustrine basin unconventional resource plays:key differences[J]. Marine and Petroleum Geology, 2014, 56(3):255-265. doi: 10.1016/j.marpetgeo.2014.02.013
[3]	HACKLEY P C, CARDOTT B J. Application of organic petrography in north American shale petroleum systems:a review[J]. International Journal of Coal Geology, 2016, 163:8-51. doi: 10.1016/j.coal.2016.06.010
[4]	李书琴, 印森林, 高阳, 等. 准噶尔盆地吉木萨尔凹陷芦草沟组混合细粒岩沉积微相[J]. 天然气地球科学, 2020, 31(2):235-249.
	LI Shuqin, YIN Senlin, GAO Yang, et al. Study on sedimentary microfacies of mixed fine-grained rocks in Lucaogou formation,Jimsar sag,Junggar basin[J]. Natural Gas Geoscience, 2020, 31(2):235-249.
[5]	LIU Chang, LIU Keyu, WANG Xiaoqi, et al. Chemo-sedimentary facies analysis of fine-grained sediment formations:an example from the Lucaogou Fm in the Jimusaer sag,Junggar basin,NW China[J]. Marine and Petroleum Geology, 2019, 110:388-402. doi: 10.1016/j.marpetgeo.2019.06.043
[6]	GAO Gang, ZHANG Weiwei, XIANG Baoli, et al. Geochemistry characteristics and hydrocarbon-generating potential of lacustrine source rock in Lucaogou formation of the Jimusaer sag,Junggar basin[J]. Journal of Petroleum Science & Engineering, 2016, 145:168-182.
[7]	王然, 常秋生, 钱永新, 等. 准噶尔盆地吉木萨尔凹陷芦草沟组页岩油“甜点体”储集特征及成因机理[J]. 石油实验地质, 2020, 42(4):604-611.
	WANG Ran, CHANG Qiusheng, QIAN Yongxin, et al. Reservoir characteristics and genesis of shale oil “sweet spots”in Lucaogou formation,Jimsar sag,Junggar basin[J]. Petroleum Geology & Experiment, 2020, 42(4):604-611.
[8]	HU Tao, PANG Xiongqi, JIANG Shu, et al. Oil content evaluation of lacustrine organic-rich shale with strong heterogeneity:a case study of the Middle Permian Lucaogou formation in Jimusaer sag,Junggar basin,NW China[J]. Fuel, 2018, 221:196-205. doi: 10.1016/j.fuel.2018.02.082
[9]	李二庭, 向宝力, 刘向军, 等. 准噶尔盆地吉木萨尔凹陷芦草沟组页岩油偏稠成因分析[J]. 天然气地球科学, 2020, 31(2):250-257.
	LI Erting, XIANG Baoli, LIU Xiangjun, et al. Study on the genesis of shale oil thickening in Lucaogou formation in Jimsar sag,Junggar basin[J]. Natural Gas Geoscience, 2020, 31(2):250-257.
[10]	覃建华, 高儇博, 彭寿昌, 等. 准噶尔盆地吉木萨尔凹陷页岩油地球化学特征及油—源对比[J]. 东北石油大学学报, 2021, 45(1):1-10.
	QIN Jianhua, GAO Xuanbo, PENG Shouchang, et al. Geochemical characteristics and oil-source correlation of shale oil in Jimsar sag,Junggar basin,China[J]. Journal of Northeast Petroleum University, 2021, 45(1):1-10.
[11]	王小军, 杨智峰, 郭旭光, 等. 准噶尔盆地吉木萨尔凹陷页岩油勘探实践与展望[J]. 新疆石油地质, 2019, 40(4):402-413.
	WANG Xiaojun, YANG Zhifeng, GUO Xuguang, et al. Practices and prospects of shale oil exploration in Jimsar sag of Junggar basin[J]. Xinjiang Petroleum Geology, 2019, 40(4):402-413.
[12]	章敬. 非常规油藏地质工程一体化效益开发实践:以准噶尔盆地吉木萨尔凹陷芦草沟组页岩油为例[J]. 断块油气田, 2021, 28(2):151-155.
	ZHANG Jing. Effective development practices of geology-engineering integration on unconventional oil reservoirs:taking Lucaogou formation shale oil in Jimsar sag,Junggar basin for example[J]. Fault-Block Oil & Gas Field, 2021, 28(2):151-155.
[13]	王博洋, 秦勇, 申建, 等. 我国低煤阶煤煤层气地质研究综述[J]. 煤炭科学技术, 2017, 45(1):170-179.
	WANG Boyang, QIN Yong, SHEN Jian, et al. Summarization of geological study on low rank coalbed methane in China[J]. Coal Science and Technology, 2017, 45(1):170-179.
[14]	支东明, 唐勇, 杨智峰, 等. 准噶尔盆地吉木萨尔凹陷陆相页岩油地质特征与聚集机理[J]. 石油与天然气地质, 2019, 40(3):524-534.
	ZHI Dongming, TANG Yong, YANG Zhifeng, et al. Geological characteristics and accumulation mechanism of continental shale oil in Jimusaer sag,Junggar basin[J]. Oil & Gas Geology, 2019, 40(3):524-534.
[15]	SU Yang, ZHA Ming, DING Xiujian, et al. Petrographic,palynologic and geochemical characteristics of source rocks of the Permian Lucaogou formation in Jimsar sag,Junggar basin,NW China:origin of organic matter input and depositional environments[J]. Journal of Petroleum Science & Engineering, 2019, 183:1-16.
[16]	郭晨. 黔西比德—三塘盆地独立叠置含煤层气系统垂向分布与煤储层吸附—渗流特征[J]. 天然气地球科学, 2015, 26(1):168-179.
	GUO Chen. Independent superposed CBM-bearing systems vertical distribution and coal reservoir adsorption & seepage characteristics in Bide-Santang basin,western Guizhou[J]. Natural Gas Geoscience, 2015, 26(1):168-179.
[17]	王博洋, 秦勇, 申建, 等. 鄂尔多斯盆地紫金山地区煤孔隙分形规律及其主控地质因素分析[J]. 高校地质学报, 2017, 23(3):499-510.
	WANG Boyang, QIN Yong, SHEN Jian, et al. The fractal regularity of coal porosity and its controlling geological factors in Zijinshan area[J]. Geological Journal of China Universities, 2017, 23(3):499-510.
[18]	WU Shuang, TANG Dazhen, LI Song, et al. Effects of geological pressure and temperature on permeability behaviors of middle-low volatile bituminous coals in eastern Ordos basin,China[J]. Journal of Petroleum Science & Engineering, 2017, 153:372-384.
[19]	赵立翠, 高旺来, 赵莉, 等. 页岩储层应力敏感性实验研究及影响因素分析[J]. 重庆科技学院学报(自然科学版), 2013, 15(3):43-46.
	ZHAO Licui, GAO Wanglai, ZHAO Li, et al. Experimental on the stress sensitivity and the influential factor analysis of shale gas reservoirs[J]. Journal of Chongqing University of Science and Technology(Natural Sciences Edition), 2013, 15(3):43-46.
[20]	刘仁静, 刘慧卿, 张红玲, 等. 低渗透储层应力敏感性及其对石油开发的影响[J]. 岩石力学与工程学报, 2011, 30(增刊1):2 697-2 702.
	LIU Renjing, LIU Huiqing, ZHANG Hongling, et al. Study of stress sensitivity and its influence on oil development in low permeability reservoir[J]. Chinese Journal of Rock Mechanics and Engineering, 2011, 30(Supp.1):2 697-2 702.
[21]	何健, 康毅力, 刘大伟, 等. 川渝地区碳酸盐岩气层钻井碱敏性实验研究[J]. 天然气工业, 2005, 25(8):60-61.
	HE Jian, KANG Yili, LIU Dawei, et al. Experimental research on drilling alkali sensitivity of carbonate gas reservoirs in Sichuan-Chongqing region[J]. Natural Gas Industry, 2005, 25(8):60-61.