Lower Limits of Pore Throat Radius for Movable Fluids in Shale Reservoirs of Lucaogou Formation in Jimsar Sag

doi:10.7657/XJPG20210515

Abstract

Abstract:

To get sufficient theoretical and experimental data for determining the lower limits of pore throat radius for movable fluids in shale reservoirs, core NMR, centrifugal, flowing and high-pressure mercury intrusion experiments were carried out on the physical characteristics of shale oil. Based on bridging theory and boundary layer theory, and combining macroscopic and microscopic analysis results, a method for determining the lower limits of pore throat radius in shale reservoirs was established. It is concluded that the lower limits of pore throat radius in the shale reservoirs of the Permian Lucaogou formation in Jimsar sag is 50 nm; the pore throats with the radius ranging from 50 nm to 500 nm are the primary contributors to movable fluids, and the contribution of the pore throats with the radius larger than 500 nm to movable fluids is less than 10%.

Key words: Jimsar sag, Lucaogou formation, shale reservoir, lower limit of pore throat radius, NMR, bridging theory, boundary layer theory, movable fluid

CLC Number:

TE112.23

TANG Hongjiao, LIANG Baoxing, LIU Weizhou, LIU Huan, SHI Feng, LAN Shangtao, WANG Qixiang. 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.

Figures/Tables 6

Fig. 1.

Table 1

Fig. 2.

Fig. 3.

Table 2

Fig. 4.

References 22

[1]	时宇, 杨正明, 黄延章. 储层流动孔喉下限研究[J]. 西南石油大学学报(自然科学版), 2009, 31(6):41-44.
	SHI Yu, YANG Zhengming, HUANG Yanzhang. The study of cut-off pore-throat in reservoir[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2009, 31(6):41-44.
[2]	万文胜, 杜军社, 佟国彰, 等. 用毛细管压力曲线确定储集层孔隙吼道半径下限[J]. 新疆石油地质, 2006, 27(1):104-106.
	WAN Wensheng, DU Junshe, TONG Guozhang, et al. Application of capillary pressure to determination of cut-off pore-throat radius in reservoirs[J]. Xinjiang Petroleum Geology, 2006, 27(1):104-106.
[3]	高阳, 蒋裕强, 杨长城, 等. 最小流动孔喉半径法确定低渗储层物性下限[J]. 科技导报, 2011, 29(4):34-38.
	GAO Yang, JIANG Yuqiang, YANG Changcheng, et al. Minimum flow pore throat radius for determination of the lower limits of parameters in low permeability reservoir[J]. Science & Technology Review, 2011, 29(4):34-38.
[4]	贾承造, 郑民, 张永峰. 中国非常规油气资源与勘探开发前景[J]. 石油勘探与开发, 2012, 39(2):129-136.
	JIA Chengzao, ZHENG Min, ZHANG Yongfeng. Unconventional hydrocarbon resources in China and the prospect of exploration and development[J]. Petroleum Exploration and Development, 2012, 39(2):129-136.
[5]	贾承造, 邹才能, 李建忠, 等. 中国致密油评价标准、主要类型、基本特征及资源前景[J]. 石油学报, 2012, 33(3):343-350.
	JIA Chengzao, ZOU Caineng, LI Jianzhong, et al. Assessment criteria,main types,basic features and resource prospects of the tight oil in China[J]. Acta Petrolei Sinica, 2012, 33(3):343-350.
[6]	邹才能, 杨智, 陶士振, 等. 纳米油气与源储共生型油气聚集[J]. 石油勘探与开发, 2012, 39(1):13-26.
	ZOU Caineng, YANG Zhi, TAO Shizhen, et al. Nano-hydrocarbon and the accumulation in coexisting source and reservoir[J]. Petroleum Exploration and Development, 2012, 39(1):13-26.
[7]	ABRAMS A. Mud design to minimize rock impairment due to particle invasion[J]. Journal of Petroleum Technology, 1977, 29(5):586-592. doi: 10.2118/5713-PA
[8]	张兆顺, 崔桂香. 流体力学[M]. 北京: 清华大学出版社, 2015.
	ZHANG Zhaoshun, CUI Guixiang. Fluid mechanics[M]. Beijing: Tsinghua University Press, 2015.
[9]	邵雨, 杨勇强, 万敏, 等. 吉木萨尔凹陷二叠系芦草沟组沉积特征及沉积相演化[J]. 新疆石油地质, 2015, 36(6):635-641.
	SHAO Yu, YANG Yongqiang, WAN Min, et al. Sedimentary characteristic and facies evolution of Permian Lucaogou formation in Jimsar sag,Junggar basin[J]. Xinjiang Petroleum Geology, 2015, 36(6):635-641.
[10]	葸克来, 操应长, 朱如凯, 等. 吉木萨尔凹陷二叠系芦草沟组致密油储层岩石类型及特征[J]. 石油学报, 2015, 36(12):1 495-1 507.
	XI Kelai, CAO Yingchang, ZHU Rukai, et al. Rock types and characteristics of tight oil reservoir in Permian Lucaogou formation,Jimsar sag[J]. Acta Petrolei Sinica, 2015, 36(12):1 495-1 507.
[11]	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.
[12]	曹元婷, 潘晓慧, 李菁, 等. 关于吉木萨尔凹陷页岩油的思考[J]. 新疆石油地质, 2020, 41(5):622-630.
	CAO Yuanting, PAN Xiaohui, LI Jing, et al. Discussion on shale oil in Jimsar sag,Junggar basin[J]. Xinjiang Petroleum Geology, 2020, 41(5):622-630.
[13]	夏显佰, 施泽进, 孙德杰. 核磁共振测井在准噶尔盆地应用研究[J]. 成都理工大学学报(自然科学版), 2003, 30(6):593-596.
	XIA Xianbai, SHI Zejin, SUN Dejie. Research on the application of well logging by NMR in Junggar basin[J]. Journal of Chengdu University of Technology (Science & Technology Edition), 2003, 30(6):593-596.
[14]	阙洪培, 累卞军. 核磁共振T₂谱法估算毛管压力曲线综述[J]. 西南石油学院学报, 2003, 25(6):9-11.
	QUE Hongpei, LEI Bianjun. Deriving capillary presure curves from NMR T₂ spectra[J]. Journal of Southwest Petroleum Institute, 2003, 25(6):9-11.
[15]	KENYON W E. Nuclear magnetic resonance as petrophysical measurement[J]. Nuclear Geophysics, 1992, 6(2):153-171.
[16]	TIMUR A. Pulsed nuclear magnetic resonance studies of porosity,movable fluid,and permeability of sandstones[J]. Journal of Petroleum Technology, 1969, 21(6):775-786. doi: 10.2118/2045-PA
[17]	李中锋, 何顺利. 低渗透储层原油边界层对渗流规律的影响[J]. 大庆石油地质与开发, 2005, 24(2):57-59.
	LI Zhongfeng, HE Shunli. Influence of boundary layers upon filtration law in low-permeability oil reservoirs[J]. Petroleum Geology & Oilfield Development in Daqing, 2005, 24(2):57-59.
[18]	徐绍良, 岳湘安, 侯吉瑞, 等. 边界层流体对低渗透油藏渗流特性的影响[J]. 西安石油大学学报(自然科学版), 2007, 22(2):26-28.
	XU Shaoliang, YUE Xiang’an, HOU Jirui, et al. Influence of boundary-layer fluid on the seepage characteristic of low-permeability reservoir[J]. Journal of Xi’an Shiyou University(Natural Science Edition), 2007, 22(2):26-28.
[19]	MICHON L, MARTIN D, PLANCHE J P, et al. Estimation of average structural parameters of bitumens by ¹³C nuclear magnetic resonance spectroscopy[J]. Fuel, 1997, 76(1):9-15. doi: 10.1016/S0016-2361(96)00184-6
[20]	丁福臣, 王宇航, 靳广洲, 等. 石油沥青质胶态粒子宏观结构尺寸的研究[J]. 石油化工高等学校学报, 2001, 14(2):31-34.
	DING Fuchen, WANG Yuhang, JIN Guangzhou, et al. Macro-size of asphaltene colloidal particles in organic solvents[J]. Journal of Petrochemical Universities, 2001, 14(2):31-34.
[21]	董喜贵, 雷群芳, 俞庆森. 石油沥青质的NMR测定及其模型分子推测[J]. 燃料化学学报, 2004, 32(6):668-672.
	DONG Xigui, LEI Qunfang, YU Qingsen. NMR determination of petroleum asphaltenes and their model molecules evaluation[J]. Journal of Fuel Chemistry and Technology, 2004, 32(6):668-672.
[22]	唐红娇, 杨立辉, 朱峰, 等. 吉木萨尔凹陷芦草沟组致密油分子尺寸及结构特征[J]. 地球科学, 2018, 43(5):1 587-1 593.
	TANG Hongjiao, YANG Lihui, ZHU Feng, et al. Molecular size and structure characteristics of tight oil of Lucaogou formation in Jimusar depression[J]. Earth Science, 2018, 43(5):1 587-1 593.