岩性油气藏 ›› 2016, Vol. 28 ›› Issue (6): 30–35.doi: 10.3969/j.issn.1673-8926.2016.06.005

• 油气地质 • 上一篇    下一篇

鄂尔多斯盆地东南部长7段陆相页岩孔隙特征与吸附能力

徐勇1,2,胡士骏1,陈国俊1,吕成福1,薛莲花1   

  1. 1.甘肃省油气资源研究重点实验室/中国科学院油气资源研究重点实验室,兰州730000;2.中国科学院大学,北京100049
  • 出版日期:2016-11-10 发布日期:2016-11-10
  • 作者简介:徐勇(1986-),男,中国科学院大学在读博士研究生,研究方向为储层地质学。地址:(730000)甘肃省兰州市城关区东岗西路382 号中国科学院油气资源研究重点实验室。E-mail:xymjjx@163.com
  • 基金资助:
    国家自然科学基金项目“鄂尔多斯盆地三叠系陆相页岩微孔隙特征与天然气赋存方式研究”(编号:41272144)、国家自然科学基金青年 基金项目“四川盆地下古生界海相页岩微孔隙特征及形成机制研究”(编号:414402130)及中国科学院战略性先导科技专项(B 类)“页岩气勘探开发基础理论与关键技术“(编号:XDB10010300)联合资助

Pore characteristics and adsorption capacity of Chang 7 shale of Yanchang Formation in the southeastern Ordos Basin

Xu Yong 1,2, Hu Shijun 1, Chen Guojun 1, Lü Chengfu1, Xue Lianhua1   

  1. 1. Key Laboratory of Petroleum Resources, Gansu Province/Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Online:2016-11-10 Published:2016-11-10

摘要: 为了深入研究鄂尔多斯盆地东南部延长组长7 段页岩孔隙特征与吸附能力,选取8 个岩心样品进行氩离子抛光—场发射扫描电镜、低温氮气吸附及等温吸附等实验。结果表明:该段页岩主要发育粒间孔、粒内孔、黄铁矿晶间孔、有机质孔及微裂缝等5 种微观孔隙类型;BET 比表面积为1.166~6.964 m2/g,孔体积为0.004 8~0.024 2 cm3/g,平均孔径为8.812~17.882 nm。等温吸附实验模拟了长7 段实际温压条件下的页岩吸附量,其最大吸附量为2.0~4.0 mg/g。长7 段页岩孔隙以中孔为主,大孔和微孔次之,纳米级孔隙发育,具有较好的吸附能力,可为进一步开展页岩气资源评价提供理论依据。

关键词: 长4+5油层组:油气成藏条件, 油气成藏机制, 林镇地区:鄂尔多斯盆地

Abstract:

In order to investigate the pore characteristics and methane adsorption capacity of Chang 7 shale of Yanchang Formation in the southeastern Ordos Basin, eight core samples were selected to carry out experiments, such as Arion milling field emission scanning electron microscope, low-temperature nitrogen adsorption and isothermal adsorption. The results show that five types of microcosmic pores are mainly developed,including intergranular pores, intragranular pores, intergranular pores in pyrite, organic pores and microfractures. The specific surface area ranges from 1.166 m2/g to 6.964 m2/g by BET equation, pore volume ranges from 0.004 8 m3/g to 0.024 2 m3/g by BJH equation, and the average pore diameter ranges from 8.812 nm to 17.882 nm. The methane adsorption capacity of Chang 7 shale under actual reservoir condition was simulated, and the maximum adsorption capacity is 2.0-4.0 mg/g. Mesopores are the main pores in Chang 7 shale, macropore and micropores come second, and nano scale pores are also developed, which indicates that the shale reservoir have good adsorption capacity. This study can provide theoretical basis for the further shale gas resource evaluation.

Key words: Chang 4+5 oil reservoir set, hydrocarbon forming conditions, hydrocarbon form ing mechanism, Linzhen area, Ordos Basin

[1] 夏 嘉,段 毅,高 苑,张晓丽,何金先,徐 丽 . 鄂尔多斯盆地林镇地区长4+5油层组油气成藏条件与机制[J]. 岩性油气藏, 2013, 25(4): 11-16.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 杨秋莲, 李爱琴, 孙燕妮, 崔攀峰. 超低渗储层分类方法探讨[J]. 岩性油气藏, 2007, 19(4): 51 -56 .
[2] 张杰, 赵玉华. 鄂尔多斯盆地三叠系延长组地震层序地层研究[J]. 岩性油气藏, 2007, 19(4): 71 -74 .
[3] 杨占龙, 张正刚, 陈启林, 郭精义,沙雪梅, 刘文粟. 利用地震信息评价陆相盆地岩性圈闭的关键点分析[J]. 岩性油气藏, 2007, 19(4): 57 -63 .
[4] 朱小燕, 李爱琴, 段晓晨, 田随良, 刘美荣. 镇北油田延长组长3 油层组精细地层划分与对比[J]. 岩性油气藏, 2007, 19(4): 82 -86 .
[5] 方朝合, 王义凤, 郑德温, 葛稚新. 苏北盆地溱潼凹陷古近系烃源岩显微组分分析[J]. 岩性油气藏, 2007, 19(4): 87 -90 .
[6] 韩春元,赵贤正,金凤鸣,王权,李先平,王素卿. 二连盆地地层岩性油藏“多元控砂—四元成藏—主元富集”与勘探实践(IV)——勘探实践[J]. 岩性油气藏, 2008, 20(1): 15 -20 .
[7] 戴朝成,郑荣才,文华国,张小兵. 辽东湾盆地旅大地区古近系层序—岩相古地理编图[J]. 岩性油气藏, 2008, 20(1): 39 -46 .
[8] 尹艳树,张尚峰,尹太举. 钟市油田潜江组含盐层系高分辨率层序地层格架及砂体分布规律[J]. 岩性油气藏, 2008, 20(1): 53 -58 .
[9] 石雪峰,杜海峰. 姬塬地区长3—长4+5油层组沉积相研究[J]. 岩性油气藏, 2008, 20(1): 59 -63 .
[10] 严世邦,胡望水,李瑞升,关键,李涛,聂晓红. 准噶尔盆地红车断裂带同生逆冲断裂特征[J]. 岩性油气藏, 2008, 20(1): 64 -68 .