Discussion on Shale Oil in Jimsar Sag, Junggar Basin

doi:10.7657/XJPG20200518

Abstract

Abstract:

Two conclusions have been existent about the crude oil of the Lucaogou formation in the Jimsar sag, Junggar basin. One conclusion classifies the crude oil as tight oil, and the other as shale oil. According to two national standards - Geological Evaluation Method for Tight Oil and Geological Evaluation Method for Shale Oil, the classification of the crude oil in the Lucaogou formation is determined. The studies show that, based on the source-reservoir relationship and layer thickness statistics, the crude oil in the Lucaogou formation of the Jimsar sag is shale oil; based on the occurrence, source-reservoir relationship and oil accumulation model, the oil is determined as shale oil which accumulates between layers. In terms of the geochemical parameters of the source rock, the lithology and physical properties of the reservoir, the parameters of the oil reservoir, fracture development and brittleness, this study investigates how the characteristics of the shale oil in the Lucaogou formation are different from the typical shale oil at home and abroad. The results show that the shale oil in the Lucaogou formation is of low to middle maturity, but a large amount of hydrocarbons have been generated and expelled in the early stage; the reservoir has high porosity, but its permeability is obviously low; the oil saturation of the reservoir is high and the oil is characterized by high density, high viscosity, low gas-oil ratio and poor fluidity. Natural fractures in the reservoir are not developed, and the brittleness calculated with the rock mechanical method is poor.

Key words: Jimsar sag, Lucaogou formation, shale oil, tight oil, geological evaluation method, shale oil classification, accumulation condition, source rock, reservoir, brittleness index

CLC Number:

TE122.2

CAO Yuanting, PAN Xiaohui, LI Jing, ZOU Yang. Discussion on Shale Oil in Jimsar Sag, Junggar Basin[J]. Xinjiang Petroleum Geology, 2020, 41(5): 622-630.

Figures/Tables 8

Fig. 1.

Fig. 2.

Table 1

Table 2

Fig. 3.

Fig. 4.

Fig. 5.

Table 3

References 38

[1]	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.
[2]	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.
[3]	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.
[4]	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.
[5]	周庆凡, 杨国丰. 致密油与页岩油的概念与应用[J]. 石油与天然气地质, 2012,33(4):541-544. doi: 10.11743/ogg20120407
	ZHOU Qingfan, YANG Guofeng. Definition and application of tight oil and shale oil terms[J]. Oil & Gas Geology, 2012,33(4):541-544.
[6]	张金川, 林腊梅, 李玉喜, 等. 页岩油分类与评价[J]. 地学前缘, 2012,19(5):322-331.
	ZHANG Jinchuan, LIN Lamei, LI Yuxi, et al. Classification and evaluation of shale oil[J]. Earth Science Frontiers, 2012,19(5):322-331.
[7]	邹才能, 杨智, 崔景伟, 等. 页岩油形成机制、地质特征及发展对策[J]. 石油勘探与开发, 2013,40(1):14-26.
	ZOU Caineng, YANG Zhi, CUI Jingwei, et al. Formation mechanism,geological characteristics and development strategy of nonmarine shale oil in China[J]. Petroleum Exploration and Development, 2013,40(1):14-26.
[8]	全国石油天然气标准化技术委员会. 页岩油地质评价方法:GB/T 38718—2020[S]. 北京:全国石油天然气标准化技术委员会, 2020.
	National Technical Committee of Petroleum and Natural Gas Standardization. Geological evaluation methods of shale oil:GB/T 38718—2020[S]. Beijing:National Technical Committee of Petroleum and Natural Gas Standardization, 2020.
[9]	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.
[10]	胡素云, 赵文智, 侯连华, 等. 中国陆相页岩油发展潜力与技术对策[J]. 石油勘探与开发, 2020,47(4):819-829.
	HU Suyun, ZHAO Wenzhi, HOU Lianhua, et al. Development potential and technical strategy of continental shale oil in China[J]. Petroleum Exploration and Development, 2020,47(4):819-829.
[11]	杜金虎, 胡素云, 庞正炼, 等. 中国陆相页岩油类型、潜力及前景[J]. 中国石油勘探, 2019,24(5):560-568.
	DU Jinhu, HU Suyun, PANG Zhenglian, et al. The types,potentials and prospects of continental shale oil in China[J]. China Petroleum Exploration, 2019,24(5):560-568.
[12]	宁方兴. 济阳坳陷不同类型页岩油差异性分析[J]. 油气地质与采收率, 2014,21(6):6-9.
	NING Fangxing. Difference analysis on different types of shale oils in Jiyang depression[J]. Petroleum Geology and Recovery Efficiency, 2014,21(6):6-9.
[13]	刘文卿, 汤达祯, 潘伟义, 等. 北美典型页岩油地质特征对比及分类[J]. 科技通报, 2016,32(11):13-18.
	LIU Wenqing, TANG Dazhen, PAN Weiyi, et al. Comparison of geological characteristics and types of typical shale oil in North America[J]. Bulletin of Science and Technology, 2016,32(11):13-18.
[14]	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.
	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.
[15]	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.
[16]	全国石油天然气标准化技术委员会. 致密油地质评价方法:GB/T 34906—2017[S]. 北京:全国石油天然气标准化技术委员会, 2017.
	National Technical Committee of Petroleum and Natural Gas Standardization. Geological evaluation methods for tight oil:GB/T 34906—2017[S]. Beijing:National Technical Committee of Petroleum and Natural Gas Standardization, 2017.
[17]	高岗, 向宝力, 王轩, 等. 准噶尔盆地吉木萨尔凹陷芦草沟组湖相混合沉积中缝合线发育与有机质富集研究[J]. 天然气地球科学, 2016,27(11):1 963-1 969.
	GAO Gang, XIANG Baoli, WANG Xuan, et al. Stylolite occurrence and organic matter enrichment of the mixed sediments in the Lucaogou formation of the Jimusaer sag in Junggar basin[J]. Natural Gas Geoscience, 2016,27(11):1 963-1 969.
[18]	朱德宇, 罗群, 姜振学, 等. 吉木萨尔凹陷芦草沟组致密储集层裂缝特征及主控因素[J]. 新疆石油地质, 2019,40(3):276-283.
	ZHU Deyu, LUO Qun, JIANG Zhenxue, et al. Fracture characteristics and main controlling factors of tight reservoirs in Lucaogou formation of Jimsar sag,Junggar basin[J]. Xinjiang Petroleum Geology, 2019,40(3):276-283.
[19]	匡立春, 王霞田, 郭旭光, 等. 吉木萨尔凹陷芦草沟组致密油地质特征与勘探实践[J]. 新疆石油地质, 2015,36(6):629-634.
	KUANG Lichun, WANG Xiatian, GUO Xuguang, et al. Geological characteristics and exploration practice of tight oil of Lucaogou formation in Jimsar sag[J]. Xinjiang Petroleum Geology, 2015,36(6):629-634.
[20]	杨智, 侯连华, 林森虎, 等. 吉木萨尔凹陷芦草沟组致密油、页岩油地质特征与勘探潜力[J]. 中国石油勘探, 2018,23(4):76-85.
	YANG Zhi, HOU Lianhua, LIN Senhu, et al. Geologic characteristics and exploration potential of tight oil and shale oil in Lucaogou formation in Jimsar sag[J]. China Petroleum Exploration, 2018,23(4):76-85.
[21]	SONNENBERG S A, PRAMUDITO A. Petroleum geology of thegiant Elm Coulee field,Williston basin[J]. AAPG Bulletin, 2009,93(9):1 127-1 153. doi: 10.1306/05280909006
[22]	BAI B J, ELGMATI M, ZHANG H, et al. Rock characterization of Fayetteville shale gas plays[J]. Fuel, 2013,105:645-652. doi: 10.1016/j.fuel.2012.09.043
[23]	高辉, 何梦卿, 赵鹏云, 等. 鄂尔多斯盆地长7页岩油与北美地区典型页岩油地质特征对比[J]. 石油实验地质, 2018,40(2):133-140.
	GAO Hui, HE Mengqing, ZHAO Pengyun, et al. Comparison of geological characteristics of Chang 7 shale oil in Ordos basin and typical shale oil in North America[J]. Petroleum Geology & Experiment, 2018,40(2):133-140.
[24]	袁伟. 鄂尔多斯盆地延长组长7段富有机质页岩形成机理[D]. 北京:中国石油大学(北京), 2018.
	YUAN Wei. Formation mechanism of the organic-rich shales in the 7th member of Yanchang formation,Ordos basin[D]. Beijing:China University of Petroleum(Beijing), 2018.
[25]	李承骏. 四川盆地中部地区侏罗系大安寨段湖相页岩油气资源潜力研究[D]. 成都:西南石油大学, 2019.
	LI Chengjun. Study on shale oil and gas resources potential of Jurassic Da’anzhai section in the central part of the Sichuan basin[D]. Chengdu:Southwest Petroleum University, 2019.
[26]	杨跃明, 黄东. 四川盆地侏罗系湖相页岩油气地质特征及勘探开发新认识[J]. 天然气工业, 2019,39(6):22-33.
	YANG Yueming, HUANG Dong. Geological characteristics and new understandings of exploration and development of Jurassic lacustrine shale oil and gas in the Sichuan basin[J]. Natural Gas Industry, 2019,39(6):22-33.
[27]	曾维主, 周国议, 宋之光. 松辽盆地青山口组页岩孔隙结构及其对页岩油富集的影响[J]. 地球化学, 2019,48(6):632-643.
	ZENG Weizhu, ZHOU Guoyi, SONG Zhiguang. Influence of pore structure on the shale oil accumulation of the Qingshankou formation in the Songliao basin[J]. Geochimica, 2019,48(6):632-643.
[28]	吕洲, 张文旗, 顾斐, 等. 松辽盆地青一段与北美鹰滩组致密油特征对比[J]. 桂林理工大学学报, 2018,38(2):217-221.
	LYU Zhou, ZHANG Wenqi, GU Fei, et al. Comparison of geological characteristics of tight oil between the Qingshankou formation in Songliao basin and the Eagle Ford formation in South Texas[J]. Journal of Guilin University of Technology, 2018,38(2):217-221.
[29]	武晓玲. 渤海湾盆地南部古近系页岩油成藏条件及资源潜力[D]. 北京:中国地质大学(北京), 2013.
	WU Xiaoling. Reservoir-forming conditions & resource potential of Paleogene shale oil from the south of Bohai Bay basin[D]. Beijing:China University of Geosciences(Beijing), 2013.
[30]	王勇, 王学军, 宋国奇, 等. 渤海湾盆地济阳坳陷泥页岩岩相与页岩油富集关系[J]. 石油勘探与开发, 2016,43(5):696-704.
	WANG Yong, WANG Xuejun, SONG Guoqi, et al. Genetic connection between mud shale lithofacies and shale oil enrichment in Jiyang depression,Bohai Bay basin[J]. Petroleum Exploration and Development, 2016,43(5):696-704.
[31]	潘仁芳, 陈美玲, 张超谟, 等. 济阳坳陷古近系沙河街组页岩有机质热演化特征[J]. 地学前缘, 2016,23(4):277-283.
	PAN Renfang, CHEN Meiling, ZHANG Chaomo, et al. Characteristics of shale organic matter thermal evolution in Paleogene Shahejie formation in Jiyang depression[J]. Earth Science Frontiers, 2016,23(4):277-283.
[32]	付金华, 牛小兵, 淡卫东, 等. 鄂尔多斯盆地中生界延长组长7段页岩油地质特征及勘探开发进展[J]. 中国石油勘探, 2019,24(5):601-614.
	FU Jinhua, NIU Xiaobing, DAN Weidong, et al. The geological characteristics and the progress on exploration and development of shale oil in Chang7 member of Mesozoic Yanchang formation,Ordos basin[J]. China Petroleum Exploration, 2019,24(5):601-614.
[33]	张林晔, 包友书, 李钜源, 等. 湖相页岩油可动性:以渤海湾盆地济阳坳陷东营凹陷为例[J]. 石油勘探与开发, 2014,41(6):641-649.
	ZHANG Linye, BAO Youshu, LI Juyuan, et al. Movability of lacustrine shale oil:a case study of Dongying sag,Jiyang depression,Bohai Bay basin[J]. Petroleum Exploration and Development, 2014,41(6):641-649.
[34]	邢玉洁. 渤海湾盆地与北美典型盆地页岩油形成条件对比研究[D]. 北京:中国石油大学(北京), 2017.
	XING Yujie. Comparative study of shale oil forming conditions in Bohai Bay basin and the typical basin of North America[D]. Beijing:China University of Petroleum(Beijing), 2017.
[35]	刘军龙. 鄂尔多斯盆地三叠系延长组长7油层组沉积体系与储层特征研究[D]. 西安:西北大学, 2018.
	LIU Junlong. Sedimentary system and reservoir rharacteristics of Chang 7 member of the Triassic Yangchang formation in Ordos basin[D]. Xi’an:Northwest University, 2018.
[36]	邹才能, 杨智, 王红岩, 等. “进源找油”:论四川盆地非常规陆相大型页岩油气田[J]. 地质学报, 2019,93(7):1 551-1 562.
	ZOU Caineng, YANG Zhi, WANG Hongyan, et al. “Exploring petroleum inside source kitchen”:Jurassic unconventional continental giant shale oil & gas field in Sichuan basin,China[J]. Acta Geologica Sinica, 2019,93(7):1 551-1 562.
[37]	刘毅. 渤海湾盆地济阳坳陷沙河街组页岩油储层特征研究[D]. 成都:成都理工大学, 2018.
	LIU Yi. Study on shale oil reservoir characteristics of Shahejie formation in Jiyang depression,Bohai Bay basin[D]. Chengdu:Chengdu University of Technology, 2018.
[38]	JIN Xiaochun, SHAH S N, ROEGIERS J, et al. Fracability evaluation in shale reservoirs:an integrated petrophysics and geomechanics approach[R]. SPE 168589, 2014.

盆地	地层	矿物含量/%							脆性指数/%	裂缝发育情况
盆地	地层	石英	长石	白云石	方解石	黏土矿物	黄铁矿	其他矿物	脆性指数/%	裂缝发育情况
Williston盆地	Bakken组	47.5	18.9	7.0		21.5	4.1	1.0	73.4	普遍发育区域性裂缝、构造缝以及排烃产生的微裂缝
Western Gulf盆地	Eagle Ford组	4.7	8.9	53.5		30.4	2.4	0.1	67.1	微裂缝富集,裂缝条件非常好
四川盆地	大安寨段	38.6	4.3	2.1	16.7	36.6	0.9	0.8	61.7	微裂缝有构造缝、页理缝、生烃超压缝
鄂尔多斯盆地	长7段	29.0	14.8	20.9		30.3	5.0	0	64.7	裂缝不发育
渤海湾盆地	沙河街组	23.5	1.5	7.0	52.5	13.0	2.0	0.5	84.5	天然裂缝发育,裂缝包括构造缝、层理缝、异常超压缝和泥质收缩缝
松辽盆地	青山口组	30.0	11.3	20.5		32.1	0	6.1	61.8	发育构造缝和层间缝
准噶尔盆地	芦草沟组	20.9	25.4	26.2	11.9	13.3	0.9	1.4	84.4	裂缝不发育