吉木萨尔凹陷芦草沟组混积型页岩油可动性实验

doi:10.7657/XJPG20230111

摘要/Abstract

摘要：

为确定吉木萨尔凹陷芦草沟组页岩油藏储集层孔喉结构及其原油可动性，利用薄片、扫描电镜、高压压汞等划分储集层；通过驱替与核磁共振联测实验，开展页岩油可动性评价，揭示可动油占比、孔径变化规律及其控制因素，建立页岩油可动性定量评价模型。芦草沟组发育粒间孔型、粒间-溶蚀-晶间孔型、溶蚀孔型、溶蚀-晶间孔型和晶间孔型5类储集空间。粒间孔型发育在粉—细砂岩相和砂质白云岩相中，可动性最好；溶蚀孔型主要发育在白云质粉砂岩相中，可动性中等；其他类型主要发育在泥岩相、泥质白云岩相和石灰质砂岩相中，可动性稍差。厘定页岩油可动孔喉下限为20 nm，可动性明显提高的孔喉界限为60 nm和150 nm，试油产能与之对应较好。页岩油赋存特征和孔喉结构共同影响页岩油可动性，粉—细砂岩相和白云质粉砂岩相的孔喉及页岩油赋存均最佳，为芦草沟组页岩油最有利开发岩相。

关键词: 吉木萨尔凹陷, 芦草沟组, 混积型页岩, 储集层, 可动油占比, 孔隙组合类型, 可动孔喉下限, 原油可动性

Abstract:

In order to determine the pore-throat structure and the mobility of crude oil in the shale reservoirs of the Lucaogou formation in the Jimsar sag，the reservoirs were classified by means of thin section identification，scanning electron microscope (SEM)，and experiments such as high-pressure mercury intrusion. The mobility of the shale oil was evaluated through a displacement-NMR combined experiment to reveal the movable oil proportion，pore size variation and its controlling factors，and then establish a quantitative evaluation model of shale oil mobility. The Lucaogou formation develops 5 types of reservoir spaces including intergranular pores，intergranular-dissolution-intercrystalline pores，dissolution pores，dissolution-intercrystalline pores，and intercrystalline pores. The intergranular pores are mainly found in the silty-fine sandstone and sandy dolomite，and exhibit the best mobility. The dissolution pores are mainly in the dolomitic siltstone，and exhibits moderate mobility. Other pores are mainly in mudstone，argillaceous dolomite and limy sandstone，and show poor mobility. The lower limit of pore throats for shale oil moving is determined to be 20 nm. When the pore throat size are 60 nm and 150 nm，the movability is significantly improved，which corresponds well to the tested production capacity. Shale oil occurrence and pore-throat structure jointly affect the mobility of shale oil. The pore throats and shale oil occurrence in silty-fine sandstone and dolomitic siltstone are the best，which are the most favorable lithofacies for developing the mixed shale oil in the Lucaogou formation.

Key words: Jimsar sag, Lucaogou formation, mixed shale, reservoir, movable oil proportion, pore combination type, lower limit of pore throat, oil mobility

中图分类号:

TE122.2

郭海平, 吴承美, 张金风, 徐田录, 肖佃师, 郭雪燚. 吉木萨尔凹陷芦草沟组混积型页岩油可动性实验[J]. 新疆石油地质, 2023, 44(1): 76-83.

GUO Haiping, WU Chengmei, ZHANG Jinfeng, XU Tianlu, XIAO Dianshi, GUO Xueyi. Experiments on Mobility of Mixed Shale Oil in Lucaogou Formation in Jimsar Sag[J]. Xinjiang Petroleum Geology, 2023, 44(1): 76-83.

图/表 8

图1

表1

图2

图3

图4

图5

图6

图7

参考文献 25

[1]	中国国家标准化管理委员会.页岩油地质评价方法:GB/T 38718—2020[S]. 北京: 中国标准出版社, 2020.
	Standardization Administration of the People’s Republic of China.Geological evaluating methods for shale oil:GB/T 38718—2020[S]. Beijing: Standards Press of China, 2020.
[2]	唐红娇, 梁宝兴, 刘伟洲, 等. 吉木萨尔凹陷芦草沟组页岩储集层流动孔喉下限[J]. 新疆石油地质, 2021, 42(5):612-616.
	TANG Hongjiao, LIANG Baoxing, LIU Weizhou, et al. Lower limits of pore throat radius for movable fluids in shale reservoirs of Lucaogou formation in Jimsar sag[J]. Xinjiang Petroleum Geology, 2021, 42(5):612-616.
[3]	赵文智, 胡素云, 侯连华, 等. 中国陆相页岩油类型、资源潜力及与致密油的边界[J]. 石油勘探与开发, 2020, 47(1):1-10.
	ZHAO Wenzhi, HU Suyun, HOU Lianhua, et al. Types and resource potential of continental shale oil in China and its boundary with tight oil[J]. Petroleum Exploration and Development, 2020, 47(1):1-10. doi: 10.1016/S1876-3804(20)60001-5
[4]	姚振华, 覃建华, 高阳, 等. 吉木萨尔凹陷页岩油物性变化规律[J]. 新疆石油地质, 2022, 43(1):72-78.
	YAO Zhenhua, QIN Jianhua, GAO Yang, et al. Variations of physical properties of shale oil in Jimsar sag, Junggar basin[J]. Xinjiang Petroleum Geology, 2022, 43(1):72-78.
[5]	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.
[6]	董岩, 肖佃师, 彭寿昌, 等. 页岩油层系储集层微观孔隙非均质性及控制因素:以吉木萨尔凹陷芦草沟组为例[J]. 矿物岩石地球化学通报, 2021, 40(1):115-123.
	DONG Yan, XIAO Dianshi, PENG Shouchang, et al. Heterogeneity of microscopic pores in shale oil reservoir and its controlling factors:taking the Lucaogou formation in the Jimusar sag as an example[J]. Bulletin of Mineralogy,Petrology and Geochemistry, 2021, 40(1):115-123.
[7]	王剑, 周路, 靳军, 等. 准噶尔盆地吉木萨尔凹陷芦草沟组页岩油储层孔隙结构、烃类赋存及其与可动性关系[J]. 石油实验地质, 2021, 43(6):941-948.
	WANG Jian, ZHOU Lu, JIN Jun, et al. Pore structure,hydrocarbon occurrence and their relationship with shale oil production in Lucaogou formation of Jimsar sag,Junggar basin[J]. Petroleum Geology & Experiment, 2021, 43(6):941-948.
[8]	刘金, 王剑, 张宝真, 等. 吉木萨尔凹陷芦草沟组页岩储层微纳米孔隙成因及含油特征[J]. 新疆地质, 2021, 39(1):94-99.
	LIU Jin, WANG Jian, ZHANG Baozhen, et al. Genesis and oil-bearing characteristics of micro-nano pores in shale reservoir of the Lucaogou formation in Jimusar depression[J]. Xinjiang Geology, 2021, 39(1):94-99.
[9]	闫林, 冉启全, 高阳, 等. 新疆芦草沟组致密油赋存形式及可动用性评价[J]. 油气藏评价与开发, 2017, 7(6):20-33.
	YAN Lin, RAN Qiquan, GAO Yang, et al. Tight oil occurrence form and recoverability evaluation of tight oil reservoir in Lucaogou formation of Xinjiang[J]. Reservoir Evaluation and Development, 2017, 7(6):20-33.
[10]	刘江斌, 李文厚, 吴小斌, 等. 延安气田北部山1段储层微观孔隙结构对可动流体赋存的影响[J]. 西北大学学报(自然科学版), 2021, 51(1):109-117.
	LIU Jiangbin, LI Wenhou, WU Xiaobin, et al. The influence of micropore structure on movable fluid of the Shan 1 reservoir in the north of Yan’an gas field[J]. Journal of Northwest University (Natural Science Edition), 2021, 51(1):109-117.
[11]	姜振学, 李廷微, 宫厚健, 等. 沾化凹陷低熟页岩油储层特征及其对页岩油可动性的影响[J]. 石油学报, 2020, 41(12):1587-1 600.
	JIANG Zhenxue, LI Tingwei, GONG Houjian, et al. Characteristics of low-mature shale reservoirs in Zhanhua sag and their influence on the mobility of shale oil[J]. Acta Petrolei Sinica, 2020, 41(12):1587-1 600.
[12]	肖佃师, 高阳, 彭寿昌, 等. 准噶尔盆地吉木萨尔凹陷混积岩孔喉系统分类及控制因素[J]. 石油勘探与开发, 2021, 48(4):719-731.
	XIAO Dianshi, GAO Yang, PENG Shouchang, et al. Classification and control factors of pore-throat systems in hybrid sedimentary rocks of Jimusar sag,Junggar basin,NW China[J]. Petroleum Exploration and Development, 2021, 48(4):719-731.
[13]	LI Junqian, WANG Siyuan, LU Suangfang, et al. Microdistribution and mobility of water in gas shale:a theoretical and experimental study[J]. Marine and Petroleum Geology, 2019, 102:496-507. doi: 10.1016/j.marpetgeo.2019.01.012
[14]	冯军, 张博为, 冯子辉, 等. 松辽盆地北部致密砂岩储集层原油可动性影响因素[J]. 石油勘探与开发, 2019, 46(2):312-321.
	FENG Jun, ZHANG Bowei, FENG Zihui, et al. Crude oil mobility and its controlling factors in tight sand reservoirs in northern Songliao basin,China[J]. Petroleum Exploration and Development, 2019, 46(2):312-321.
[15]	HU Tao, PANG Xiaogqi, WANG Qifeng, et al. Geochemical and geological characteristics of Permian Lucaogou formation shale of the Well Ji174,Jimsar sag,Junggar basin,China:implications for shale oil exploration[J]. Geological Journal, 2018, 53(5):2371-2 385. doi: 10.1002/gj.2903
[16]	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.
[17]	王璟明, 肖佃师, 卢双舫, 等. 吉木萨尔凹陷芦草沟组页岩储层物性分级评价[J]. 中国矿业大学学报, 2020, 49(1):172-183.
	WANG Jingming, XIAO Dianshi, LU Shuangfang, et al. Classification evaluation of shale oil reservoir physical properties in Lucaogou formation,Jimsar sag[J]. Journal of China University of Mining & Technology, 2020, 49(1):172-183.
[18]	王屿涛, 杨作明, 马万云, 等. 吉木萨尔凹陷芦草沟组致密油地球化学特征及成因[J]. 新疆石油地质, 2017, 38(4):379-384.
	WANG Yutao, YANG Zuoming, MA Wanyun, et al. Geochemical characteristics and genesis of tight oil in Lucaogou formation of Jimsar sag[J]. Xinjiang Petroleum Geology, 2017, 38(4):379-384.
[19]	WASHBURN E W. The dynamics of capillary flow[J]. The Physical Review, 1921, 17(3):273-283. doi: 10.1103/PhysRev.17.273
[20]	ZHANG Jingya, LIU Guangdi, CAO Zhe, et al. Characteristics and formation mechanism of multi-source mixed sedimentary rocks in a saline lake,a case study of the Permian Lucaogou formation in the Jimusaer sag,northwest China[J]. Marine and Petroleum Geology, 2019, 102:704-724. doi: 10.1016/j.marpetgeo.2019.01.016
[21]	王俞策, 曹剑, 陶柯宇, 等. 准噶尔盆地芦草沟组致密油系统油源对比与成藏非均质性[J]. 南京大学学报(自然科学), 2020, 50(3):322-337.
	WANG Yuce, CAO Jian, TAO Keyu, et al. Oil-source correlation and accumulation heterogeneity of tight oils in the Middle Permian Lucaogou formation,Junggar basin[J]. Journal of Nanjing University (Natural Science), 2020, 50(3):322-337.
[22]	刘云彦. 致密油储层测井评价方法研究[D]. 北京: 中国石油大学(北京), 2016.
	LIU Yunyan. Study of logging evaluation method for tight oil reservoir[D]. Beijing: China University of Petroleum (Beijing), 2016.
[23]	张宪国, 张涛, 刘玉从, 等. 深层低渗-致密气层孔喉参数核磁共振测井定量解释[J]. 中国矿业大学学报, 2020, 49(5):941-950.
	ZHANG Xianguo, ZHANG Tao, LIU Yucong, et al. Quantitative interpretation of pore-throat parameter in deep low permeability-tight gas reservoir with NMR logging[J]. Journal of China University of Mining & Technology, 2020, 49(5):941-950.
[24]	梁则亮, 贾春明, 姚卫江, 等. 核磁共振测井法表征致密砂砾岩储层孔隙结构[J]. 核电子学与探测技术, 2020, 40(6):948-954.
	LIANG Zeliang, JIA Chunming, YAO Weijiang, et al. Method to characterize the pore structure of tight glutenite reservoirs using nuclear magnetic resonance (NMR) logging data[J]. Nuclear Electronics & Detection Technology, 2020, 40(6):948-954.
[25]	宁凡, 赵欣, 邹妞妞, 等. 柴北缘侏罗系大煤沟组砂岩储层孔喉分布特征[J]. 非常规油气, 2022, 9(3):42-51.
	NING Fan, ZHAO Xin, ZOU Niuniu, et al. Distribution characteristics of pore throat of sandstone reservoir of Jurassic Dameigou formation in northern Qaidam basin[J]. Unconventional Oil & Gas, 2022, 9(3):42-51.