A Study on Microscopic Pore Characteristics of Tight Reservoir of Chang 7 Sedimentation Section of Yanchang Formation, Ordos Basin

doi:10.11885/j.issn.1674-5086.2015.05.01.02

Abstract

Abstract: There lacks systematic research into the complex characteristics of tight oil reservoir in Ordos Basin. By means of core observation, test data analysis, constant speed mercury injection experiment, field emission and CT scanning etc., we studied the formation and characteristics of Chang 7 tight oil reservoir. The research suggests that tight oil reservoir consists of tight sandstone formation of traction current and gravity flow deposits of Chang 7 section of Yanchang formation, which is of poor reservoir property with fine granularity, thick reservoir, high brittleness,. Pore types are mainly intergranular pores and feldspar dissolved pores which are mainly micro-nano-scale pores with flake-shaped and tube-shaped throats; due to the filling of clay minerals and organic matter, effective pore volume is small, but micro cracks are highly developed and are of good connectivity; lower limit of oil reservoir physical property is low, and fluid saturation is high.

Key words: Ordos Basin, tight oil, micro-pores and nano-pores, field emission, CT sanning

CLC Number:

TE122

ZHANG Zhongyi, CHEN Shijia, YAO Jingli, LIU Xin, ZHAO Yingquan. A Study on Microscopic Pore Characteristics of Tight Reservoir of Chang 7 Sedimentation Section of Yanchang Formation, Ordos Basin[J]. 西南石油大学学报(自然科学版), 2016, 38(6): 70-80.

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References

[1] 邹才能,朱如凯,吴松涛,等. 常规与非常规油气聚集类型、特征、机理及展望——以中国致密油和致密气为例[J]. 石油学报, 2012, 33(2):173-187. doi:10.7623/syxb201202001 ZOU Caineng, ZHU Rukai, WU Songtao, et al. Types, characteristics, genesis and prospects of conventional and unconventional hydrocarbon accumulations:Taking tight oil and tight gas in China as an instance[J]. Acta Petrolei Sinica, 2012, 33(2):173-187. doi:10.7623/syxb201202001
[2] 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. doi:10.7623/syxb201203001 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. doi:10.7623/syxb201203001
[3] 邹才能,杨智,张国生,等. 常规-非常规油气"有序聚集"理论认识及实践意义[J]. 石油勘探与开发, 2014, 44(1):14-27. doi:10.11698/PED.2014.01.02 ZOU Caineng, YANG Zhi, ZHANG Guosheng, et al. Conventional and unconventional petroleum "orderly accumulation":Concept and practical significance[J]. Petroleum Exploration and Development, 2014, 44(1):14-27. doi:10.11698/PED.2014.01.02
[4] 邹才能,张国生,杨智,等. 非常规油气概念、特征、潜力及技术——兼论非常规油气地质学[J]. 石油勘探与开发,2013,40(4):385-399. doi:10.11698/PED.2013.04.01 ZOU Caineng, ZHANG Guosheng, YANG Zhi, et al. Geological concepts, characteristics, resource potential and key techniques of unconventional hydrocarbon:On unconventional petroleum geology[J]. Petroleum Exploration and Development, 2013, 40(4):385-399. doi:10.11698/PED.2013.04.01
[5] 李宪文,张矿生,樊凤玲,等. 鄂尔多斯盆地低压致密油层体积压裂探索研究及试验[J]. 石油天然气学报, 2013, 35(3):142-146, 152. doi:10.3969/j.issn.1000-9752.2013.03.032 LI Xianwen, ZHANG Kuangsheng, FAN Fengling, et al. Study and experiment on volumetric fracturing in low pressure tight formation of Ordos Basin[J]. Journal of Oil and Gas Technology, 2013, 35(3):142-146, 152. doi:10.3969/j.issn.1000-9752.2013.03.032
[6] 杨华,李士祥,刘显阳. 鄂尔多斯盆地致密油、页岩油特征及资源潜力[J]. 石油学报,2013,34(1):1-11. doi:10.7623/syxb201301001 YANG Hua, LI Shixiang, LIU Xianyang. Characteristics and resource prospects of tight oil and shale in Ordos Basin[J]. Acta Petrolei Sinica, 2013, 34(1):1-11. doi:10.7623/syxb201301001
[7] 杨华,付金华,何海清,等. 鄂尔多斯盆地华庆地区低渗透岩性大油区形成与分布[J]. 石油勘探与开发, 2012, 39(6):641-648. YANG Hua, FU Jinhua, HE Haiqing, et al. Formation and distribution of large low-permeability lithologic oil regions in Huaqing, Ordos Basin[J]. Petroleum Exploration and Development, 2012, 39(6):641-648.
[8] 姚泾利,邓秀芹,赵彦德,等. 鄂尔多斯盆地延长组致密油特征[J]. 石油勘探与开发, 2013, 40(2):150-158. doi:10.11698/PED.2013.02.03 YAO Jingli, DENG Xiuqin, ZHAO Yande, et al. Characteristics of tight oil in Triassic Yanchang Formation, Ordos Basin[J]. Petroleum Exploration and Development, 2013, 40(2):150-158. doi:10.11698/PED.2013.02.03
[9] 喻建,杨亚娟,杜金良. 鄂尔多斯盆地晚三叠世延长组湖侵期沉积特征[J]. 石油勘探与开发, 2010, 37(2):181-187. YU Jian, YANG Yajuan, DU Jinliang. Sedimentation during the transgression period in late Triassic Yanchang Formation, Ordos Basin[J]. Petroleum Exploration and Development, 2010, 37(2):181-187.
[10] 邹才能,赵政璋,杨华,等. 陆相湖盆深水砂质碎屑流成因机制与分布特征——以鄂尔多斯盆地为例[J]. 沉积学报, 2009, 27(6):1065-1075. ZOU Caineng, ZHAO Zhengzhang, YANG Hua, et al. Genetic mechanism and distribution of sandy debris flows in terrestrial Lacustrine Basin[J]. Acta Sedimentologica Sinica, 2009, 27(6):1065-1075.
[11] 李浩,任战利,高海仁,等. 延长气田上古生界烃源岩评价及生排烃特征[J]. 天然气工业, 2015, 35(4):33-39.doi:10.3787/j.issn.1000-0976.2015.04.005 LI Hao, REN Zhanli, GAO Hairen, et al. Quality evaluation and hydrocarbon generation-expulsion characteristics of source rocks in Upper Paleozoic in the Yanchang Gasfield, Ordos Basin[J]. Natural Gas Industry, 2015, 35(4):33-39.doi:10.3787/j.issn.1000-0976.2015.04.005
[12] 邓秀芹,付金华,姚泾利,等. 鄂尔多斯盆地中及上三叠统延长组沉积相与油气勘探的突破[J]. 古地理学报, 2011, 13(4):443-455. doi:10.7605/gdlxb.2011.04.008 DENG Xiuqin, FU Jinhua, YAO Jingli, et al. Sedimentary facies of the middle-upper Triassic Yanchang Formation in Ordos Basin and breakthrough in petroleum exploration[J]. Journal of Palaeogeography, 2011, 13(4):443-455. doi:10.7605/gdlxb.2011.04.008
[13] 田建锋,高永利,张蓬勃,等. 鄂尔多斯盆地合水地区长7致密油储层伊利石成因[J]. 石油与天然气地质, 2013, 34(5):700-707. doi:10.11743/ogg20130518 TIAN Jianfeng, GAO Yongli, ZHANG Pengbo, et al. Genesis of illite in Chang 7 tight oil reservoir in Heshui area, Ordos Basin[J]. Oil & Gas Geology, 2013, 34(5):700-707. doi:10.11743/ogg20130518
[14] 孙致学,孙治雷,鲁洪江,等. 砂岩储集层中碳酸盐胶结物特征——以鄂尔多斯盆地中南部延长组为例[J]. 石油勘探与开发, 2010, 37(5):543-551. SUN Zhixue, SUN Zhilei, LU Hongjiang, et al. Characteristics of carbonate cements in sandstone reservoirs:A case from Yanchang Formation, middle and southern Ordos Basin, China[J]. Petroleum Exploration and Development, 2010, 37(5):543-551.
[15] 姚泾利,王琪,张瑞,等. 鄂尔多斯盆地华庆地区延长组长6砂岩绿泥石膜的形成机理及其环境指示意义[J]. 沉积学报, 2011, 29(1):72-79. YAO Jingli, WANG Qi, ZHANG Rui, et al. Forming mechanism and their environmental implications of chlorite-coatings in Chang 6 sandstone (upper Triassic) of Hua-Qing area, Ordos Basin[J]. Acta Sedimentologica Sinica, 2011, 29(1):72-79.
[16] CLARKSON C R, JENSEN J L, PEDERSEN P K, et al. Innovative methods for flow-unit and pore-structure analyses in a tight siltstone and shale gas reservoir[J]. AAPG Bulletin, 2012, 96(2):355-374. doi:10.1306/05181110171
[17] 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. Nanohydrocarbon and the accumulation in coexisting source and reservoir[J]. Petroleum Exploration and Development, 2012, 39(1):13-26.
[18] 李卫成,张艳梅,王芳,等. 应用恒速压汞技术研究致密油储层微观孔喉特征——以鄂尔多斯盆地上三叠统延长组为例[J]. 岩性油气藏, 2012, 24(6):60-65. doi:10.3969/j.issn.1673-8926.2012.06.013 LI Weicheng, ZHANG Yanmei, WANG Fang, et al. Application of constant-rate mercury penetration technique to study of pore throat characteristics of tight reservoir:A case study from the upper Triassic Yanchang Formation in Ordos Basin[J]. Lithologic Reservoirs, 2012, 24(6):60-65. doi:10.3969/j.issn.1673-8926.2012.06.013
[19] NELSON P H. Pore-throat sizes in sandstones, tight sandstones, and shales[J]. AAPG Bulletin, 2009, 93(3):329-340. doi:10.1306/10240808059
[20] 白斌,朱如凯,吴松涛,等. 利用多尺度CT成像表征致密砂岩微观孔喉结构[J]. 石油勘探与开发, 2013, 40(3):329-333. doi:10.11698/PED.2013.03.09 BAI Bin, ZHU Rukai, WU Songtao, et al. Multi-scale method of Nano (Micro)-CT study on microscopic pore structure of tight sandstone of Yanchang Formation, Ordos Basin[J]. Petroleum Exploration and Development, 2013, 40(3):329-333. doi:10.11698/PED.2013.03.09
[21] 崔景伟,朱如凯,吴松涛,等. 致密砂岩层内非均质性及含油性下限——以鄂尔多斯盆地三叠系延长组长7段为例[J]. 石油学报, 2013, 34(5):877-882. doi:10.7623/syxb201305008 CUI Jingwei, ZHU Rukai, WU Songtao, et al. Heterogeneity and lower oily limits for tight sandstones:A case study on Chang-7 oil layers of the Yanchang Formation, Ordos Basin[J]. Acta Petrolei Sinica, 2013, 34(5):877-882. doi:10.7623/syxb201305008
[22] 喻建,杨孝,李斌,等. 致密有储层可动流体饱和度计算方法——以合水地区长7致密油储层为例[J]. 石油实验地质, 2014, 36(6):767-772, 779. doi:10.11781/sysydz201406767 YU Jian, YANG Xiao, LI Bin, et al. A method of determining movable fluid saturation of tight oil reservoirs:A case study of tight oil reservoirs in seventh member of Yanchang Formation in Heshui area[J]. Petroleum Geology & Experiment, 2014, 36(6):767-772, 779. doi:10.11781/sysydz201406767
[23] 师调调,孙卫,何生平. 低渗透储层微观孔隙结构与可动流体饱和度关系研究[J]. 地质科技情报, 2012, 31(4):81-85. SHI Tiaotiao, SUN Wei, HE Shengping. Relationship between micro-pore structure and movable fluid saturation in low permeability reservoir[J]. Geological Science and Technology Information, 2012, 31(4):81-85.