Lithologic Reservoirs ›› 2013, Vol. 25 ›› Issue (1): 1-3.doi: 10.3969/j.issn.1673-8926.2013.01.001

    Next Articles

Shale gas is free gas underground

LI Chuanliang， ZHU Suyang   

  1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation， Southwest Petroleum University， Chengdu 610500， China
  • Online:2013-02-20 Published:2013-02-20

PDF (PC)

817

Abstract:

  In order to clarify some misunderstandings of shale gas, the occurrence state of shale gas was studied. Shale is a type of rock consisting of matrix mudstone and micro sandslices, which is heterogeneous mudstone with stratification structures. Sandslices are microscopic and poorly continuous, which are the micro traps of lithology in shale. The methane generated in matrix of shale migrates a short distance into sandsilces and accumulates and forms reservoirs. Shale gas is free gas stored in micro sandslices. There is no adsorption gas in shale matrix and sandslices. Shale gas reservoirs are not continuous reservoirs, which consist of numerous micro gas reservoirs. There is no connection between micro gas reservoirs. The development of shale gas needs to use horizontal wells with multiple macrofracturing which can connect mirco gas reservoirs as more as possible. Because there is only one component of methane in shale gas, the concept of concentration is not appropriate and the diffusion phenomenon cannot take place in shale gas development. Gas flow driven by pressure difference is the main mechanism of shale gas production. Shale gas reservoirs are typical single-pore media, but not dual-pore media.

Key words: hydrocarbon accumulation condition, Yanchang Formation, Chang 2 oil reservoir set, Jiyuan area, Ordos Basin

［1］ 赵澄林，朱筱敏.沉积岩石学［M］.第3 版.北京：石油工业出版社，2001：37-137.
［2］ 张厚福，方朝亮，高先志，等.石油地质学［M］.北京：石油工业出版社，1999：127-178.
［3］ 伍友佳.油藏地质学［M］.第2 版.北京：石油工业出版社，2004：33-64.
［4］ 李传亮，张景廉，杜志敏.油气初次运移理论新探［J］.地学前缘，2007，14（4）：132-142.
［5］ 李明诚.石油与天然气运移［M］.第3 版.北京：石油工业出版社，2004：72-73.
［6］ 李传亮.气水可以倒置吗? ［J］.岩性油气藏，2010，22（2）：128-132.
［7］ 天津大学物理化学教研室编.物理化学（下）［M］.第2 版.北京：高等教育出版社，1983：162-179.
［8］ 李传亮，彭朝阳.煤层气的开采机理研究［J］.岩性油气藏，2011，23（4）：9-11.
［9］ 李传亮.地下没有亲油的岩石［J］.新疆石油地质，2011，32（2）：197-198.
［10］ 李传亮，李冬梅.渗吸的动力不是毛管压力［J］.岩性油气藏，2011，23（2）：114-117.
［11］ 李传亮.储层岩石连续性特征尺度研究［J］.中国海上油气，2004，18（1）：63-65.
［12］ 李传亮. 油藏工程原理［M］.第2 版.北京：石油工业出版社，2011：100-103.
[1] Guan Yunwen, Su Siyu, Pu Renhai, Wang Qichao, Yan Sujie, Zhang Zhongpei, Chen Shuo, Liang Dongge. Palaeozoic gas reservoir-forming conditions and main controlling factors in Xunyi area，southern Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(6): 77-88.
[2] WANG Zixin, LIU Guangdi, YUAN Guangjie, YANG Henglin, FU Li, WANG Yuan, CHEN Gang, ZHANG Heng. Characteristics and reservoir control of source rocks of Triassic Chang 7 member in Qingcheng area，Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(5): 133-144.
[3] YIN Hu, QU Hongjun, SUN Xiaohan, YANG Bo, ZHANG Leigang, ZHU Rongxing. Characteristics of deep-water deposits and evolution law of Triassic Chang 7 reservoir in southeastern Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(5): 145-155.
[4] MOU Feisheng, YIN Xiangdong, HU Cong, ZHANG Haifeng, CHEN Shijia, DAI Linfeng, LU Yifan. Distribution characteristics and controlling factors of tight oil of Triassic Chang 7 member in northern Shaanxi area，Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(4): 71-84.
[5] DUAN Yifei, ZHAO Weiwei, YANG Tianxiang, LI Fukang, LI Hui, WANG Jianan, LIU Yuchen. Source-reservoir characteristics and accumulation rules of shale gas of Permian Shanxi Formation in Yan'an area, Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(3): 72-83.
[6] WANG Hongbo, ZHANG Lei, CAO Qian, ZHANG Jianwu, PAN Xing. Sedimentary model of fluvial fan of Permian He-8 member in Ordos Basin and its exploration significance [J]. Lithologic Reservoirs, 2024, 36(3): 117-126.
[7] CAO Jiangjun, WANG Xi, WANG Liuwei, LI Cheng, SHI Jian, CHEN Zhaobing. Characteristics and main controlling factors of interbedded shale oil reservoirs of Triassic Chang 7 member in Heshui area，Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(3): 158-171.
[8] LI Qihui, REN Dazhong, NING Bo, SUN Zhen, LI Tian, WAN Cixuan, YANG Fu, ZHANG Shiming. Micro-pore structure characteristics of coal seams of Jurassic Yan’an Formation in Shenmu area，Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(2): 76-88.
[9] LEI Tao, MO Songyu, LI Xiaohui, JIANG Nan, ZHU Chaobin, WANG Qiao, QU Xuejiao, WANG Jia. Sandbody superimposition patterns and oil and gas exploration significance of Permian Shanxi Formation in Daniudi gas field，Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(2): 147-159.
[10] ZHAI Yonghe, HE Dengfa, KAI Baize. Tectonic-depositional environment and prototype basin evolution of Middle-Late Permian in Ordos Basin and adjacent areas [J]. Lithologic Reservoirs, 2024, 36(1): 32-44.
[11] LONG Shengfang, HOU Yunchao, YANG Chao, GUO Yixuan, ZHANG Jie, ZENG Yali, GAO Nan, LI Shanghong. Sequence stratigraphy and evolution of Triassic Chang 7 to Chang 3 mebers in Qingcheng area，southwestern Ordos Basin [J]. Lithologic Reservoirs, 2024, 36(1): 145-156.
[12] DU Jiangmin, CUI Zihao, JIA Zhiwei, ZHANG Yi, NIE Wancai, LONG Pengyu, LIU Boyuan. Sedimentary characteristics of Ma 55 sub-member of Ordovician Majiagou Formation in Sulige area，Ordos Basin [J]. Lithologic Reservoirs, 2023, 35(5): 37-48.
[13] WEI Jiayi, WANG Hongwei, LIU Gang, LI Han, CAO Qian. Sedimentary characteristics of Carboniferous Yanghugou Formation in thrust belt on the western margin of Ordos Basin [J]. Lithologic Reservoirs, 2023, 35(5): 120-130.
[14] YIN Yanshu, DING Wengang, AN Xiaoping, XU Zhenhua. Configuration characterization of Triassic Chang 611reservoir in Sai 160 well area of Ansai oilfield，Ordos Basin [J]. Lithologic Reservoirs, 2023, 35(4): 37-49.
[15] XUE Nan, SHAO Xiaozhou, ZHU Guangyou, ZHANG Wenxuan, QI Yalin, ZHANG Xiaolei, OUYANG Siqi, WANG Shumin. Geochemical characteristics and formation environment of source rocks of Triassic Chang 7 member in northern Pingliang area，Ordos Basin [J]. Lithologic Reservoirs, 2023, 35(3): 51-65.
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
[1] HUANG Sijing,HUANG Peipei,WANG Qingdong,LIU Haonian,WU Meng,ZOU Mingliang. The significance of cementation in porosity preservation in deep-buried sandstones[J]. Lithologic Reservoirs, 2007, 19(3): 7 -13 .
[2] LIU Zhen,CHEN Yanpeng,ZHAO Yang,HAO Qi,XU Xiaoming,CHANG Mai. Distribution and controlling factors of hydrocarbon reservoirs in continental fault basins[J]. Lithologic Reservoirs, 2007, 19(2): 121 -127 .
[3] DING Chao，GUO Lan，YAN Jifu. Forming conditions of Chang 6 reservoir in Anding area of Zichang Oilfield[J]. Lithologic Reservoirs, 2009, 21(1): 46 -50 .
[4] LI Yanshan，ZHANG Zhansong，ZHANG Chaomo，CHEN Peng. Application of mercury injection data to Chang 6 reservoir classification in Changqing area[J]. Lithologic Reservoirs, 2009, 21(2): 91 -93 .
[5] LUO Peng,LI Guorong,SHI Zejin,ZHOU Dazhi,TANG Hongwei,ZHANG Deming. Analysis of sequence stratigraphy and sedimentary facies of M aokou Formation in southeastern Sichuan[J]. Lithologic Reservoirs, 2010, 22(2): 74 -78 .
[6] ZUO Guoping， TU Xiaolong， XIA Jiufeng. Study on volcanic reservoir types in Subei exploration area[J]. Lithologic Reservoirs, 2012, 24(2): 37 -41 .
[7] WANG Feiyu. Method to improve producing degree of thermal recovery horizontal wells and its application[J]. Lithologic Reservoirs, 2010, 22(Z1): 100 -103 .
[8] YUAN Yunfeng，CAI Ye，FAN Zuochun，JIANG Yiyang，QIN Qirong， JIANG Qingping. Fracture characteristics of Carboniferous volcanic reservoirs in Hongche fault belt of Junggar Basin[J]. Lithologic Reservoirs, 2011, 23(1): 47 -51 .
[9] YUAN Jianying， FU Suotang， CAO Zhenglin， YAN Cunfeng，ZHANG Shuichang， MA Dade. Multi-source hydrocarbon generation and accumulation of plateau multiple petroleum system in Qaidam Basin[J]. Lithologic Reservoirs, 2011, 23(3): 7 -14 .
[10] GENG Yanfei， ZHANG Chunsheng， HAN Xiaofeng， YANG Dachao. Study on formation mechanism of low resistivity gas bearing reservoir in Anyue-Hechuan area[J]. Lithologic Reservoirs, 2011, 23(3): 70 -74 .
TRENDMD:

Copyright © 2018 Lithologic Reservoirs

Support by Beijing Magtech support@magtech.com.cn