Quantitative Characterization and Classification of Pore Structures in Chang 4+5 Member in Block Hu-154, Ordos Basin

doi:10.7657/XJPG20210403

Abstract

Abstract:

In Block Hu-154 of Hujianshan oilfield in the Ordos basin, the reservoirs of Chang 4+5 member in the Triassic Yanchang formation are of low porosity and low permeability, and there are few researches on the pore structures of the reservoirs and detailed quantitative analysis, which may be the cause for the rapid production decline and less waterflooding control in this block. Based on the data of cores, slices, cast thin sections, SEM, high-pressure mercury intrusion and phase permeability experiments, quantitative characterization and classification of the pore structures have been carried out, and the plane distribution of the pore structures has been studied by combining with well logging curves in the study area. The results show that residual intergranular pores and flake-like and curved flake-like throats are dominant in the Chang 4+5 member in the study area. According to the structure, the pores can be divided into three types: (1) Type Ⅰ pores: the fractal dimension is 2.57~2.61, the average displacement pressure is 1.62 MPa and the oil production rate is over 2 t/d; (2) Type Ⅱpores: the fractal dimension is 2.61~2.66, the average displacement pressure is 2.61 MPa and the oil production rate is higher than 1~2 t/d; (3) Type Ⅲ pores: the fractal dimension is 2.66~2.71, the average displacement pressure is 3.52 MPa and the oil production rate is lower than 1 t/d. Reservoirs with Type II and III pores are distributed on a large scale, and the pore structure in the Chang (4+5)₂ is better than that in the Chang (4+5)₁ in the study area.

Key words: Ordos basin, Hujianshan oilfield, Block Hu-154, Yanchang formation, reservoir, Chang 4+5 member, pore structure, quantitative characterization

CLC Number:

TE122.23

DING Qiang, CHENG Jian, YANG Bo, JIN Zixin, LIU Fei, ZHAO Ziwen, YU Jingwei. Quantitative Characterization and Classification of Pore Structures in Chang 4+5 Member in Block Hu-154, Ordos Basin[J]. Xinjiang Petroleum Geology, 2021, 42(4): 410-417.

Figures/Tables 7

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Table 1.

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References 34

[1]	杨俊杰. 鄂尔多斯盆地构造演化与油气分布规律[M]. 北京: 石油工业出版社, 2002.
	YANG Junjie. Tectonic evolution and oil-gas reservoirs distribution in Ordos basin[M]. Beijing: Petroleum Industry Press, 2002.
[2]	杨友运. 鄂尔多斯盆地南部延长组沉积体系和层序特征[J]. 地质通报, 2005, 24(4):369-372.
	YANG Youyun. Characteristics of the depositional systems and sequence evolution of the Yanchang formation in the southern Ordos basin[J]. Geological Bulletin of China, 2005, 24(4):369-372.
[3]	焦方正, 邹才能, 杨智. 陆相源内石油聚集地质理论认识及勘探开发实践[J]. 石油勘探与开发, 2020, 47(6):1 067-1 078.
	JIAO Fangzheng, ZOU Caineng, YANG Zhi. Geological theory and exploration ＆ development practice of hydrocarbon accumulation inside continental source kitchens[J]. Petroleum Exploration and Development, 2020, 47(6):1 067-1 078.
[4]	刘文龙, 郑礼鹏, 杨梦涛, 等. 胡尖山油田胡154区低产低效井综合治理技术探讨[J]. 石油化工应用, 2017, 36(7):44-47.
	LIU Wenlong, ZHENG Lipeng, YANG Mengtao, et al. Discussion on comprehensive control technology of low production and low efficiency wells in Block Hu-154 of Hujianshan oilfield[J]. Petrochemical Industry Application, 2017, 36(7):44-47.
[5]	郑奎, 卜广平, 张换果, 等. 胡154井区长4+5段储层非均质性及其对剩余油开发的影响[J]. 大庆石油地质与开发, 2020, 39(6):85-96.
	ZHENG Kui, BU Guangping, ZHANG Huanguo, et al. Reservoir heterogeneity and its affection on the remained oil development for member Chang 4+5 in Block Hu-154[J]. Petroleum Geology ＆ Oilfield Development in Daqing, 2020, 39(6):85-96.
[6]	王猛, 叶青, 袁丙龙, 等. 基于量化参数的储层非均质性分布规律研究:以涠西南凹陷为例[J]. 断块油气田, 2020, 27(5):597-602.
	WANG Meng, YE Qing, YUAN Binglong, et al. Distribution regularity research of reservoir heterogeneity based on quantitative parameters:a case study of Weixinan sag[J]. Fault Block Oil & Gas Field, 2020, 27(5):597-602.
[7]	李晓慧, 姜振学, 萧汉敏, 等. 大庆扶余油层致密储层孔隙结构及非均质性研究[J]. 科学技术与工程, 2020, 20(24):9 835-9 843.
	LI Xiaohui, JIANG Zhenxue, XIAO Hanmin, et al. Study on pore structure and heterogeneity of tight reservoir in Fuyu reservoirs,Daqing[J]. Science Technology and Engineering, 2020, 20(24):9 835-9 843.
[8]	于景维, 唐群英, 吴军, 等. 阜东斜坡齐古基准面旋回与储集层微观非均质性[J]. 西南石油大学学报(自然科学版), 2020, 42(2):37-47.
	YU Jingwei, TANG Qunying, WU Jun, et al. Cyclic sequences and microscopic heterogeneity of reservoirs in the Qigu formation of the Fudong slope area[J]. Journal of Southwest Petroleum University(Science ＆ Technology Edition), 2020, 42(2):37-47.
[9]	于景维, 郑荣才, 殷新花, 等. 准噶尔盆地阜东斜坡区头屯河组储集层非均质性综合研究[J]. 成都理工大学学报(自然科学版), 2014, 41(5):567-576.
	YU Jingwei, ZHENG Rongcai, YIN Xinhua, et al. A comprehensive research on reservoir heterogeneity of Toutunhe formation in slope area,east of Fukang sag,Junggar basin,Xinjiang,China[J]. Journal of Chengdu University of Technology(Science & Technology Edition), 2014, 41(5):567-576.
[10]	柳妮, 文华国, 于景维, 等. 准噶尔阜康东部斜坡区中侏罗统头屯河组高分辨层序地层格架内储集层宏观非均质性研究[J]. 地质论评, 2014, 60(5):1 158-1 166.
	LIU Ni, WEN Huaguo, YU Jingwei, et al. Analysis of macroscopic heterogeneity within high resolution sequence stratigraphic framework in Toutunhe formation of Middle Jurassic in east of Fukang slope zone,Junggar basin[J]. Geological Review, 2014, 60(5):1 158-1 166.
[11]	刘学珍, 杨迎春, 周翔. 鄂尔多斯盆地代家坪地区延长组原油成因及成藏期次[J]. 新疆石油地质, 2019, 40(4):414-421.
	LIU Xuezhen, YANG Yingchun, ZHOU Xiang. Genesis and accumulation periods of oil in Yanchang formation of Daijiaping area,Ordos basin[J]. Xinjiang Petroleum Geology, 2019, 40(4):414-421.
[12]	孙卫, 史成恩, 赵惊蛰, 等. X-CT扫描成像技术在特低渗透储层微观孔隙结构及渗流机理研究中的应用:以西峰油田庄19井区长8₂储层为例[J]. 地质学报, 2006, 80(5):775-779.
	SUN Wei, SHI Cheng’en, ZHAO Jingzhe, et al. Application of X-CT scanned image technique in the research of micro-pore texture and percolation mechanism in ultra-permeable oil field:taking an example from Chang 8₂ formation in the Xifeng oil field[J]. Acta Geologica Sinica, 2006, 80(5):775-779.
[13]	全洪慧, 朱玉双, 张洪军, 等. 储层孔隙结构与水驱油微观渗流特征:以安塞油田王窑区长6油层组为例[J]. 石油与天然气地质, 2011, 32(6):952-960.
	QUAN Honghui, ZHU Yushuang, ZHANG Hongjun, et al. Reservoir pore structure and micro-flow characteristics of waterflooding:a case study from Chang 6 reservoir of Wangyao block in Ansai oilfield[J]. Oil & Gas Geology, 2011, 32(6):952-960.
[14]	宋广寿, 高辉, 高静乐, 等. 西峰油田长8储层微观孔隙结构非均质性与渗流机理实验[J]. 吉林大学学报(地球科学版), 2009, 39(1):53-59.
	SONG Guangshou, GAO Hui, GAO Jingle, et al. Experiment of microscopic pore structure heterogeneity and flow mechanism of Chang 8 reservoir in Xifeng oilfield[J]. Journal of Jilin University(Earth Science Edition), 2009, 39(1):53-59.
[15]	刘一杉, 东晓虎, 闫林, 等. 吉木萨尔凹陷芦草沟组孔隙结构定量表征[J]. 新疆石油地质, 2019, 40(3):284-289.
	LIU Yishan, DONG Xiaohu, YAN Lin, et al. Quantitative characterization of pore structure of Lucaogou formation in Jimsar sag[J]. Xinjiang Petroleum Geology, 2019, 40(3):284-289.
[16]	王瑞飞, 陈明强, 孙卫. 鄂尔多斯盆地延长组超低渗透砂岩储层微观孔隙结构特征研究[J]. 地质论评, 2008, 54(2):270-277.
	WANG Ruifei, CHEN Mingqiang, SUN Wei. The research of micro-pore structure in super-low permeability sandstone reservoir of the Yanchang formation in Ordos basin[J]. Geological Review, 2008, 54(2):270-277.
[17]	蔡忠. 储集层孔隙结构与驱油效率关系研究[J]. 石油勘探与开发, 2000, 27(6):45-46.
	CAI Zhong. The study on the relationship between reservoir pore structure and oil displacement efficiency[J]. Petroleum Exploration and Development, 2000, 27(6):45-46.
[18]	胡志明, 把智波, 熊伟, 等. 低渗透油藏微观孔隙结构分析[J]. 大庆石油学院学报, 2006, 30(3):51-53.
	HU Zhiming, BA Zhibo, XIONG Wei, et al. Analysis of micro pore structure in low permeability reservoirs[J]. Journal of Daqing Petroleum Institute, 2006, 30(3):51-53.
[19]	郝乐伟, 王琪, 唐俊. 储层岩石微观孔隙结构研究方法与理论综述[J]. 岩性油气藏, 2013, 25(5):123-128.
	HAO Lewei, WANG Qi, TANG Jun. Research progress of reservoir microscopic pore structure[J]. Lithologic Reservoirs, 2013, 25(5):123-128.
[20]	刘世明, 唐书恒, 霍婷, 等. 柴达木盆地东缘上石炭统泥页岩孔隙结构及分形特征[J]. 天然气地球科学, 2020, 31(8):1 069-1 081.
	LIU Shiming, TANG Shuheng, HUO Ting, et al. Pore structure and fractal characteristics of the Upper Carboniferous shale,eastern Qaidam basin[J]. Natural Gas Geoscience, 2020, 31(8):1 069-1 081.
[21]	张全培, 王海红, 刘美荣, 等. 超低渗透储层全孔径分布及其分形特征研究[J]. 中国矿业大学学报, 2020, 49(6):1 137-1 149.
	ZHANG Quanpei, WANG Haihong, LIU Meirong, et al. Study of the full pore size distribution and fractal characteristics of ultra-low permeability reservoir[J]. Journal of China University of Mining & Technology, 2020, 49(6):1 137-1 149.
[22]	梁志凯, 李卓, 姜振学, 等. 基于NMR和SEM技术研究陆相页岩孔隙结构与分形维数特征:以松辽盆地长岭断陷沙河子组页岩为例[J]. 地球科学与环境学报, 2020, 42(3):313-328.
	LIANG Zhikai, LI Zhuo, JIANG Zhenxue, et al. Characteristics of pore structure and fractal dimension in continental shale based on NMR experiments and SEM image analyses:a case study of Shahezi formation shale in Changling fault depression of Songliao basin,China[J]. Journal of Earth Science and Environment, 2020, 42(3):313-328.
[23]	贺承祖, 华明琪. 储层孔隙结构的分形几何描述[J]. 石油与天然气地质, 1998, 19(1):17-25.
	HE Chengzu, HUA Mingqi. Fractal geometry description of reservoir pore structure[J]. Oil ＆ Gas Geology, 1998, 19(1):17-25.
[24]	贾芬淑, 沈平平, 李克文. 砂岩孔隙结构的分形特征及应用研究[J]. 断块油气田, 1995, 2(1):16-21.
	JIA Fenshu, SHEN Pingping, LI Kewen. Study on the fractal characteristics of sandstone pore structure and its application[J]. Fault-Block Oil & Gas Field, 1995, 2(1):16-21.
[25]	LIAN T L, RADHAKRISHNAN P, SAGAR B S D. Morphological decomposition of sandstone pore-space:fractal power-laws[J]. Chaos Solitons & Fractals, 2004, 19,(2):339-346.
[26]	AI T, ZHANG R, ZHOU H W, et al. Box-counting methods to directly estimate the fractal dimension of a rock surface[J]. Applied Surface Science, 2014, 314:610-621. doi: 10.1016/j.apsusc.2014.06.152
[27]	宁传祥, 姜振学, 高之业, 等. 用核磁共振和高压压汞定量评价储层孔隙连通性:以沾化凹陷沙三下亚段为例[J]. 中国矿业大学学报, 2017, 46(3):578-585.
	NING Chuanxiang, JIANG Zhenxue, GAO Zhiye, et al. Quantitative evaluation of pore connectivity with nuclear magnetic resonance and high pressure mercury injection:a case study of the lower Es₃ in Zhanhua sag[J]. Journal of China University of Mining & Technology, 2017, 46(3):578-585.
[28]	孟子圆, 孙卫, 刘登科, 等. 联合压汞法的致密储层微观孔隙结构及孔径分布特征:以鄂尔多斯盆地吴起地区长6储层为例[J]. 地质科技情报, 2019, 38(2):208-216.
	MENG Ziyuan, SUN Wei, LIU Dengke, et al. Combined mercury porosimetry to characterize the microscopic pore structure and pore size distribution of tight reservoirs:a case of Chang 6 reservoir in Wuqi area,Ordos basin[J]. Geological Science and Technology Information, 2019, 38(2):208-216.
[29]	欧阳思琪, 孙卫, 黄何鑫. 多方法协同表征特低渗砂岩储层全孔径孔隙结构:以鄂尔多斯盆地合水地区砂岩储层为例[J]. 石油实验地质, 2018, 40(4):595-604.
	OUYANG Siqi, SUN Wei, HUANG Hexin. Multi-method synergistic characterization of total pore structure of extra-low permeability sandstone reservoirs:case study of the Heshui area of Ordos basin[J]. Petroleum Geology & Experiment, 2018, 40(4):595-604.
[30]	田华, 张水昌, 柳少波, 等. 压汞法和气体吸附法研究富有机质页岩孔隙特征[J]. 石油学报, 2012, 33(3):419-427.
	TIAN Hua, ZHANG Shuichang, LIU Shaobo, et al. Determination of organic-rich shale pore features by mercury injection and gas adsorption methods[J]. Acta Petrolei Sinica, 2012, 33(3):419-427.
[31]	况晏, 司马立强, 瞿建华, 等. 致密砂砾岩储层孔隙结构影响因素及定量评价:以玛湖凹陷玛131井区三叠系百口泉组为例[J]. 岩性油气藏, 2017, 29(4):91-100.
	KUANG Yan, SIMA Liqiang, QU Jianhua, et al. Influencing factors and quantitative evaluation of pore structure of tight glutenite reservoir:a case of Triassic Baikouquan formation in Ma131 well field,Mahu sag[J]. Lithologic Reservoirs, 2017, 29(4):91-100.
[32]	于景维, 付欢, 张宗斌, 等. 准噶尔盆地阜东斜坡区头屯河组岩石物理相特征[J]. 石油与天然气地质, 2018, 39(1):129-139.
	YU Jingwei, FU Huan, ZHANG Zongbin, et al. Petrophysical facies of Toutunhe formation in Fudong slope area,Junggar basin[J]. Oil & Gas Geology, 2018, 39(1):129-139.
[33]	伊振林, 张雷. 基于微观孔隙结构的特低渗储层分类评价方法:以大庆油田古龙南地区为例[J]. 断块油气田, 2020, 27(1):40-44.
	YI Zhenlin, ZHANG Lei. Classification of extra-low permeability reservoir based on microscopic pore structure:a case study of South Gulong area in Daqing oilfield[J]. Fault-Block Oil & Gas Field, 2020, 27(1):40-44.
[34]	蔡涵鹏, 贺振华, 唐湘蓉, 等. 碳酸盐岩孔隙结构影响分析和等效孔隙结构参数计算[J]. 石油物探, 2013, 52(6):566-572.
	CAI Hanpeng, HE Zhenhua, TANG Xiangrong, et al. Influence analysis of carbonate pore structure and calculation of equivalent pore structure parameters[J]. Geophysical Prospecting for Petroleum, 2013, 52(6):566-572.

类型	分形维数	孔隙组合	喉道类型	渗透率/ mD	孔隙度/ %	分选系数	变异系数	中值半径/ μm	排驱压力/ MPa	岩性	原孔隙结构分类	日产油量/ t
Ⅰ类	2.57~ 2.61	剩余粒间孔	片状、缩颈型	0.26~ 5.26	10.60~ 13.80	1.62~ 3.30	0.16~ 0.41	0.07~ 0.62	0.03~ 2.58	细砂岩、粉-细砂岩	Ⅰ、Ⅱ类	>2
Ⅱ类	2.61~ 2.66	剩余粒间孔、粒内溶孔	片状、弯片状	0.13~ 11.37	9.10~ 13.50	1.25~ 2.89	0.18~ 0.22	0.08~ 0.36	1.26~ 4.06	粉-细砂岩、粉砂岩	主要为Ⅱ、Ⅲ类,少量Ⅰ类	1~2
Ⅲ类	2.66~ 2.71	粒内溶孔、粒间溶孔、剩余粒间孔	弯片、及片状	0.12~ 9.13	8.90~ 10.90	0.10~ 2.63	0.13~ 0.21	0.05~ 0.12	2.16~ 6.98	粉砂岩、含泥粉砂岩	Ⅱ、Ⅲ类	<1