黔东南岑巩地区下寒武统黑色页岩孔隙结构特征

王濡岳; 胡宗全; 杨滔; 龚大建; 尹帅; 刘忠宝; 高波

doi:10.11781/sysydz201902207

黔东南岑巩地区下寒武统黑色页岩孔隙结构特征

doi: 10.11781/sysydz201902207

王濡岳^1,2,3,
胡宗全^1,2,
杨滔³,
龚大建⁴,
尹帅⁵,
刘忠宝^1,2,
高波^1,2

1. 中国石化石油勘探开发研究院, 北京 100083;
2. 页岩油气富集机理与有效开发国家重点实验室, 北京 100083;
3. 中国石油大学(北京) 地球科学学院, 北京 102249;
4. 铜仁中能天然气有限公司, 贵州铜仁 554300;
5. 西安石油大学地球科学与工程学院, 西安 710065

基金项目:

国家自然科学基金（41872124）、国家科技重大专项（2017ZX05036002-001，2016ZX05034004-003，2017ZX05036004-001）和中国石化科技开发部项目（P15114，P17027-2）联合资助。

详细信息

作者简介:
王濡岳(1990-),男,博士,工程师,从事非常规油气地质研究。E-mail:wry1990@vip.qq.com。

中图分类号: TE122.23
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出版历程
- 收稿日期: 2018-01-12
- 修回日期: 2019-02-20
- 刊出日期: 2019-03-28

Pore structure characteristics of the Lower Cambrian black shale in the Cengong block, southeastern Guizhou area

1. Petroleum Exploration and Production Research Institute, SINOPEC, Beijing 100083, China;
2. State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China;
3. College of Geosciences, China University of Petroleum(Beijing), Beijing 102249, China;
4. Tongren Sino-Energy Natural Gas Corporation, Tongren, Guizhou 554300, China;
5. School of Earth Science and Engineering, Xi'an Shiyou University, Xi'an, Shaanxi 710065, China

摘要

摘要: 利用矿物组分、有机地球化学、氮气吸附、物性及扫描电镜等资料，对黔东南岑巩地区下寒武统牛蹄塘组和变马冲组页岩孔隙结构特征进行了系统研究。牛蹄塘组与变马冲组贫有机质页岩以平板和狭缝形黏土粒间孔为主，平均孔径普遍大于5 nm；牛蹄塘组富有机质页岩以狭缝形和少量墨水瓶状孔为主，平均孔径普遍小于3~4 nm，比表面积为贫有机质页岩的2~3倍。页岩总孔容与比表面积、黏土含量与平均孔径均为正相关关系，而前二者与后二者均为负相关关系。有利保存条件下页岩具有相对"高孔低渗"特征，峰值孔径较大，有机质孔发育程度较高，孔渗相关性强。不利保存条件下页岩储层致密，孔隙度与峰值孔径较低，裂缝过度发育造成相对"低孔高渗"特征。有机碳含量对孔隙结构具有重要控制作用，与孔容、比表面及孔隙度总体正相关，与平均孔径负相关；过高有机碳含量层段页岩塑性增强，孔径较低，压实作用和不利保存条件等因素使部分狭窄孔喉发生萎缩、坍塌与闭合，导致孔隙度、孔容、比表面和脆性与有机碳含量出现负相关关系。
- 孔隙结构 /
- 保存条件 /
- 页岩 /
- 牛蹄塘组 /
- 变马冲组 /
- 下寒武统 /
- 上扬子地区
Abstract: Based on the mineralogy, organic geochemistry, nitrogen adsorption, physical properties and FE-SEM observation, the pore structure characteristics of the Niutitang and Bianmachong marine shales of the Lower Cambrian in the southeastern Guizhou area were systematically analyzed. The dominant pore types of the organic-lean shale with a high clay mineral content in the Niutitang and Bianmachong formations are plate-like and slit-like inter particle pores with average pore sizes commonly greater than 5 nm. However, the organic-rich shale in the Niutitang Formation mainly contains slit-like and ink-bottle-like pores with average pore sizes less than 3-4 nm, and the specific surface area is 2-3 times of that of the organic-lean shale. In addition, the total pore volume and specific surface area have a positive correlation, and there is also a correlation between clay mineral content and average pore size, but the correlations between total pore volume/specific surface area and clay mineral content/average pore size are negative. Under favorable preservation conditions, the shale has a relatively high development level of organic matter pores, greater values of porosity, pore size and peak diameter with a positive correlation between porosity and permeability, which are represented as “high porosity and low permeability”. Under unfavorable preservation conditions, the reservoir parameters have lower values except the permeability, which leads to the overdevelopment of fractures and has the feature of “low porosity and high permeability”. Besides, the TOC content has a significant control on pore structure and generally has a positive correlation with total pore volume, specific surface area and porosity and a negative correlation with average pore size. Nevertheless, in the intervals with an excessive TOC content, the decrease and increase of pore size and ductility with increasing TOC coupled with compaction and/or unfavorable preservation will result in the atrophy, collapse and close of narrow pores and throats which leads to the negative correlations between TOC and reservoir parameters.
- pore structure /
- preservation condition /
- shale /
- Niutitang Formation /
- Bianmachong Formation /
- Lower Cambrian /
- Upper Yangtze area

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参考文献(15)

[1]	胡宗全,杜伟,彭勇民,等.页岩微观孔隙特征及源-储关系:以川东南地区五峰组-龙马溪组为例[J].石油与天然气地质,2015,36(6):1001-1008. HU Zongquan,DU Wei,PENG Yongmin,et al.Microscopic pore characteristics and the source-reservoir relationship of shale:a case study from the Wufeng and Longmaxi formations in southeast Sichuan Basin[J].Oil & Gas Geology,2015,36(6):1001-1008.
[2]	金之钧,胡宗全,高波,等.川东南地区五峰组-龙马溪组页岩气富集与高产控制因素[J].地学前缘,2016,23(1):1-10. JIN Zhijun,HU Zongquan,GAO Bo,et al.Controlling factors on the enrichment and high productivity of shale gas in the Wufeng-Longmaxi Formation,southeastern Sichuan Basin[J].Earth Science Frontiers,2016,23(1):1-10.
[3]	于炳松.页岩气储层孔隙分类与表征[J].地学前缘,2013,20(4):211-220. YU Bingsong.Classification and characterization of gas shale pore system[J].Earth Science Frontiers,2013,20(4):211-220.
[4]	MILLIKEN K L,RUDNICKI M,AWWILLER D N,et al.Organic matter-hosted pore system,Marcellus Formation (Devonian),Pennsylvania[J].AAPG Bulletin,2013,97(2):177-200.
[5]	聂海宽,边瑞康,张培先,等.川东南地区下古生界页岩储层微观类型与特征及其对含气量的影响[J].地学前缘,2014,21(4):331-343. NIE Haikuan,BIAN Ruikang,ZHANG Peixian,et al.Micro-types and characteristics of shale reservoir of the Lower Paleozoic in southeast Sichuan Basin,and their effects on the gas content[J].Earth Science Frontiers,2014,21(4):331-343.
[6]	姜振学,唐相路,李卓,等.川东南地区龙马溪组页岩孔隙结构全孔径表征及其对含气性的控制[J].地学前缘,2016,23(2):126-134. JIANG Zhenxue,TANG Xianglu,LI Zhuo,et al.The Whole-aperture pore structure characteristics and its effect on gas content of the Longmaxi Formation shale in the southeastern Sichuan Basin[J].Earth Science Frontiers,2016,23(2):126-134.
[7]	朱炎铭,王阳,陈尚斌,等.页岩储层孔隙结构多尺度定性-定量综合表征:以上扬子海相龙马溪组为例[J].地学前缘,2016,23(1):154-163. ZHU Yanming,WANG Yang,CHEN Shangbin,et al.Qualitative-quantitative multiscale characterization of pore structures in shale reservoirs:a case study of Longmaxi Formation in the Upper Yangtze area[J].Earth Science Frontiers,2016,23(1):154-163.
[8]	魏祥峰,李宇平,魏志红,等.保存条件对四川盆地及周缘海相页岩气富集高产的影响机制[J].石油实验地质,2017,39(2):147-153. WEI Xiangfeng,LI Yuping,WEI Zhihong,et al.Effects of pre-servation conditions on enrichment and high yield of shale gas in Sichuan Basin and its periphery[J].Petroleum Geology & Experiment,2017,39(2):147-153.
[9]	张培先.黔中隆起及邻区下寒武统页岩气成藏特殊性分析[J].石油实验地质,2017,39(2):162-168. ZHANG Peixian.Peculiar accumulation conditions for shale gas in the Lower Cambrian in Qianzhong Uplift and its periphery[J].Petroleum Geology & Experiment,2017,39(2):162-168.
[10]	丰国秀,陈盛吉.岩石中沥青反射率与镜质体反射率之间的关系[J].天然气工业,1988,8(3):20-25. FENG Guoxiu,CHEN Shengji.Relationship between the reflectance of bitumen and vitrinite in rock[J].Natural Gas Industry,1988,8(3):20-25.
[11]	SING K S W.Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984)[J].Pure and Applied Chemistry,1985,57(4):603-619.
[12]	刘伟新,俞凌杰,张文涛,等.川东南龙马溪组页岩微观孔隙结构特征[J].海洋地质与第四纪地质,2016,36(3):127-134. LIU Weixin,YU Lingjie,ZHANG Wentao,et al.Micro-pore structure of Longmaxi shale from southeast Sichuan Basin[J].Marine Geology & Quaternary Geology,2016,36(3):127-134.
[13]	王濡岳,胡宗全,聂海宽,等.川东南五峰组-龙马溪组与黔东南牛蹄塘组页岩储层特征对比分析与差异性探讨[J].石油实验地质,2018,40(5):639-649. WANG Ruyue,HU Zongquan,NIE Haikuan,et al.Comparative analysis and discussion of shale reservoir characteristics in the Wufeng-Longmaxi and Niutitang formations:a case study of the well JY1 in SE Sichuan Basin and well TX1 in SE Guizhou area[J].Petroleum Geology & Experiment,2018,40(5):639-649.
[14]	刘友祥,俞凌杰,张庆珍,等.川东南龙马溪组页岩的矿物组成与微观储集特征研究[J].石油实验地质,2015,37(3):328-333. LIU Youxiang,YU Lingjie,ZHANG Qingzhen,et al.Mineral composition and microscopic reservoir features of Longmaxi shales in southeastern Sichuan Basin[J].Petroleum Geology & Experiment,2015,37(3):328-333.
[15]	张汉荣,王强,倪楷,等.川东南五峰-龙马溪组页岩储层六性特征及主控因素分析[J].石油实验地质,2016,38(3):320-325. ZHANG Hanrong,WANG Qiang,NI Kai,et al.Six characte-ristics and main controlling factors of shale reservoirs in the Wufeng-Longmaxi formations,southeastern Sichuan Basin[J].Petroleum Geology & Experiment,2016,38(3):320-325.