深圳大学学报理工版

孙中良,王芙蓉,何生,等.潜江凹陷古近系盐间典型韵律层页岩孔隙结构[J].深圳大学学报理工版,2019,36(No.3(221-330)):289-297.[doi:10.3724/SP.J.1249.2019.03289]
SUN Zhongliang,WANG Furong,HE Sheng,et al.The pore structures of the shale about typical inter-salt rhythm in the Paleogene of Qianjiang depression[J].Journal of Shenzhen University Science and Engineering,2019,36(No.3(221-330)):289-297.[doi:10.3724/SP.J.1249.2019.03289]

点击复制

潜江凹陷古近系盐间典型韵律层页岩孔隙结构

孙中良¹,王芙蓉¹,何生¹,郑有恒²,吴世强²,罗京¹

1)中国地质大学构造与油气资源教育部重点实验室,湖北武汉 430074; 2)中国石化江汉油田分公司勘探开发研究院,湖北武汉 430223

关键词：地质学; 江汉盆地; 盐间页岩油; 盐韵律; 矿物成分; 孔隙结构; 含油性

The pore structures of the shale about typical inter-salt rhythm in the Paleogene of Qianjiang depression

SUN Zhongliang¹, WANG Furong¹, HE Sheng¹, ZHENG Youheng², WU Shiqiang², and LUO Jing¹

1)Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geoscience, Wuhan 430074, Hubei Province, P.R.China2)Research Institute of Exploration and Development,SINOPEC Jianghan Oilfield Branch Company, Wuhan 430223, Hubei Province, P.R.China

Keywords： geology; Jianghan Basin; inter-salt shale oil; salt rhythm; mineral composition; pore structure; oiliness

DOI: 10.3724/SP.J.1249.2019.03289

备注

摘要

全文

图/表

参考文献

为精细刻画江汉盆地潜江凹陷潜江组34段第10韵律(简称Eq3410韵律)页岩的矿物组成、岩相特征组合、孔隙类型和孔径分布,判断孔隙结构的影响因素,寻找最有利的页岩油勘探目标,采用X射线衍射、低温氮气吸附、薄片观察、扫描电镜和能谱分析等方法进行研究.结果发现,潜江凹陷Eq3410韵律的矿物成分主要有白云石、方解石和黏土矿物,以及钙芒硝、石英、长石、石盐和黄铁矿等,主要岩相有泥质云岩相、云质泥岩相、灰质泥岩相和泥质灰岩相; 主要孔隙类型为白云石晶间孔、粘土矿物晶间孔和碎屑粒间孔,泥质云岩相和云质泥岩相的页岩孔隙结构较好,主要受白云石、黏土矿物和钙芒硝含量的影响.页岩油储层的总有机碳质量分数和含油性也与这些地质因素密切相关,黏土矿物质量分数约为20%、白云石质量分数约为60%的泥质云岩相为最好的页岩油勘探目标.

X-ray diffraction(XRD), low temperature nitrogen adsorption, rock pyrolysis, thin section observation, scanning electrochemical microscopy and X-ray energy dispersive spectrometer are used to determine the mineral composition, lithofacies characteristics, pore types and size distribution, and the influencing factors on pore structures of the 10 rhythm of Qian 34 formation(Eq3410 for short)of Qianjiang Sag in the Jianghan Basin. The results show that the mineral compositions of the Eq3410 rhythm are mainly dolomite, calcite, clay minerals, and anisometric glauberite, quartz, feldspar, rock salt, and pyrite. The lithofacies include argillaceous dolomite facies, dolomitic mudstone facies, calcareous mudstone facies and argillaceous limestone facies. Intercrystalline pores of dolomite and clay minerals, and detrital intergranular pores commonly develope in the shales of Eq3410 rhythm. Better pore structures mostly exist in the argillaceous dolomite facies and dolomitic mudstone facies,and their characteristics are mainly affected by dolomite, clay minerals and glauberite, so are the total organic carbon and oil content of shale oil reservoir. The shale with 20% clay minerals and 60% dolomite in argillaceous dolomite facies is the best exploration target for inter-salt shale oil reservoir.

引言
1 区域地质背景
2 样品与实验
3 实验结果及讨论
4 结论

图1 潜江凹陷沉积相及取样位置图[6]<br/>Fig.1 (Color online)Sedimentary facies and sample locations in the Qianjiang Sag [6]

图1 潜江凹陷沉积相及取样位置图[6]
Fig.1 (Color online)Sedimentary facies and sample locations in the Qianjiang Sag [6]

图2 潜江凹陷W99井Eq3410韵律测井与岩相综合图<br/>Fig.2 (Color online)Eq3410 prosodic logging and facies synthetical map of W99 well in the Qianjiang Sag

图2 潜江凹陷W99井Eq3410韵律测井与岩相综合图
Fig.2 (Color online)Eq3410 prosodic logging and facies synthetical map of W99 well in the Qianjiang Sag

图3 潜江凹陷W99井Eq3410韵律页岩样品矿物成分条形图<br/>Fig.3 (Color online)A bar chart of the mineral composition of Eq3410 prosodic shale samples in the W99 well of Qianjiang Sag

图3 潜江凹陷W99井Eq3410韵律页岩样品矿物成分条形图
Fig.3 (Color online)A bar chart of the mineral composition of Eq3410 prosodic shale samples in the W99 well of Qianjiang Sag

图4 潜江凹陷W99井Eq3410韵律页岩样品岩相分类图<br/>Fig.4 (Color online)Classification diagram of Eq3410 prosodic shale samples in the W99 well of Qianjiang Sag

图4 潜江凹陷W99井Eq3410韵律页岩样品岩相分类图
Fig.4 (Color online)Classification diagram of Eq3410 prosodic shale samples in the W99 well of Qianjiang Sag

图5 潜江凹陷W99井Eq3410韵律页岩样品氮吸附曲线图<br/>Fig.5 (Color online)Nitrogen adsorption curve of Eq3410 prosodic shale sample in the W99 well of Qianjiang Sag

图5 潜江凹陷W99井Eq3410韵律页岩样品氮吸附曲线图
Fig.5 (Color online)Nitrogen adsorption curve of Eq3410 prosodic shale sample in the W99 well of Qianjiang Sag

图6 潜江凹陷W99井Eq3410韵律页岩不同孔径范围内的孔体积比例直方图<br/>Fig.6 The pore volume ratio histogram of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag

图6 潜江凹陷W99井Eq3410韵律页岩不同孔径范围内的孔体积比例直方图
Fig.6 The pore volume ratio histogram of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag

图7 潜江凹陷W99井Eq3410韵律页岩孔体积与孔径关系图<br/>Fig.7 The relationship between pore volume and pore size distribution of Eq3410 in the W99 well of Qianjiang Sag

图7 潜江凹陷W99井Eq3410韵律页岩孔体积与孔径关系图
Fig.7 The relationship between pore volume and pore size distribution of Eq3410 in the W99 well of Qianjiang Sag

图8 场发射扫描电子显微镜下潜江凹陷W99井Eq3410韵律页岩主要孔隙类型<br/>Fig.8 (Color online)The main pore types of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag using field emission scanning electron microscope

图8 场发射扫描电子显微镜下潜江凹陷W99井Eq3410韵律页岩主要孔隙类型
Fig.8 (Color online)The main pore types of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag using field emission scanning electron microscope

图9 潜江凹陷W99井Eq3410韵律页岩TOC含量与总孔体积关系散点图<br/>Fig.9 TOC content and total pore volume relationship scatter diagram of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag

图9 潜江凹陷W99井Eq3410韵律页岩TOC含量与总孔体积关系散点图
Fig.9 TOC content and total pore volume relationship scatter diagram of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag

图10 潜江凹陷W99井Eq3410韵律不同页岩样品TOC与S1关系图<br/>Fig.10 The relationship between TOC and S1 in different shale samples of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag

图10 潜江凹陷W99井Eq3410韵律不同页岩样品TOC与S1关系图
Fig.10 The relationship between TOC and S1 in different shale samples of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag

图11 潜江凹陷W99井Eq3410韵律页岩矿物成分与含油饱和度指数关系图<br/>Fig.11 The relationship between mineral composition and oil saturation index of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag

图11 潜江凹陷W99井Eq3410韵律页岩矿物成分与含油饱和度指数关系图
Fig.11 The relationship between mineral composition and oil saturation index of the Eq3410 prosodic shale in the W99 well of Qianjiang Sag

[1] HU Qinhong, ZHANG Yuxiang, MENG Xianghao, et al. Characterization of micro-nano pore networks in shale oil reservoirs of Paleogene Shahejie Formation in Dongying Sag of Bohai Bay Basin, East China[J]. Petroleum Exploration and Development, 2017, 44(5): 720-730.
[2] 聂海宽,张培先,边瑞康,等.中国陆相页岩油富集特征[J].地学前缘,2016,23(2):55- 62.
[3] SCHNELLR C, JOHNSONB J, OLTMANSS J, et al. Quantifying wintertime boundary layer ozone production from frequent profile measurements in the Uinta Basin, UT, oil and gas region[J]. Journal of Geophysical, Research-atmospheres, 2016, 121(18): 11038-11054.
[4] 王国力,杨玉卿,张永生,等.江汉盆地潜江凹陷王场地区古近系潜江组沉积微相及其演变[J].古地理学报,2004,6(2):140-150.
[5] 吴世强,唐小山,杜小娟,等.江汉盆地潜江凹陷陆相页岩油地质特征[J].东华理工大学学报自然科学版,2013,36(3):282-286.
[6] 熊智勇,吴世强,王洋,等.江汉盐湖盆地盐间泥质白云岩油藏地质特征与实践[J].地质科技情报,2015,34(2):181-187.
[7] 王芙蓉,何生,郑有恒,等.江汉盆地潜江凹陷潜江组盐间页岩油储层矿物组成与脆性特征研究[J].石油实验地质,2016,38(2):211-218.
[8] 方志雄.潜江盐湖盆地盐间沉积的石油地质特征[J].沉积学报,2002,20(4): 608- 613.
[9] 李世臻,刘卫彬,王丹丹,等.中美陆相页岩油地质条件对比[J].地质论评,2017,63(增刊1):39- 40.
[10] 张永生,王国力,杨玉卿,等.江汉盆地潜江凹陷古近系盐湖沉积盐韵律及其古气候意义[J].古地理学报,2005,7(4):461- 470.
[11] 李明慧,康世昌,郑绵平,等.青藏高原秋里南木湖盐类沉积韵律[J].高校地质学报,2007,13(1):35- 42.
[12] 金强,朱光有,王娟.咸化湖盆优质烃源岩的形成与分布[J].中国石油大学学报自然科学版,2008,32(4):19-23.
[13] 马中良,郑伦举,李志明,等.盐类物质对泥质烃源岩生排烃过程的影响[J].西南石油大学学报自然科学版,2013,35(1):43-51.
[14] 朱德燕,王勇,银燕,等.断陷湖盆咸化环境沉积与页岩油气关系——以东营凹陷、渤南地区为例[J].油气地质与采收率,2015,22(6):7-13.
[15] 戴世昭.中国石油地质志:卷9[M].北京:石油工业出版社,1991:161-163.
[16] 杨智,邹才能,吴松涛,等.含油气致密储层纳米级孔喉特征及意义[J].深圳大学学报理工版,2015,32(3):257-265.
[17] 杨智,邹才能,付金华,等.基于原位转化/改质技术的陆相页岩选区评价——以鄂尔多斯盆地三叠系延长组7段页岩为例[J].深圳大学学报理工版,2017,34(3):221-228.
[18] 杨锐,何生,胡东风,等.焦石坝地区五峰组-龙马溪组页岩孔隙结构特征及其主控因素[J].地质科技情报,2015,34(5):105-113.
[19] 金武军,李军,王亮,等.页岩气储层孔隙系统的多尺度联合表征及评价——以焦石坝龙马溪组为例[J].科学技术与工程,2016,24(24):35- 41.
[20] BRUNAUER S, EMMETT P H, TELLER E. Adsorption of gases in multimolecular layers[J]. American Chemical Society, 1938, 60(2): 309-319.
[21] BRUNAUER S, EMMETT P H, TELLER E. On a theory of the van der Waals adsorption of gases[J]. American Chemical Society, 1940, 62(7): 1723-1732.
[22] ROUQUEROL F, ROUQUEROL J, SING K. Adsorption by powders and porous solids: principles, methodology and applications[M]. San Diego, USA: Academic Press, 1999: 439- 467.
[23] ROUQUEROL J, AVNIR D, FAIRBRIDGE C W, et al. Recommendations for the characterization of porous solids[J]. Bulletin of Canadian Petroleum Geology, 2008, 56(1): 1-21.
[24] 曹涛涛,宋之光.页岩有机质特征对有机孔发育及储层的影响[J].特种油气藏,2016,23(4):7-13.