A Brief Discussion of Unconventional Oil and Gas Geology in China: Qualitative Change in the Densification of Sandstone Reservoirs
详细信息
- 责任者：Wang Jinqi (Southwest Branch ; SINOPEC ; Chengdu 610081 ; China)
- 刊名：Natural Gas Industry
- 出版年：2013
- 卷期：33(9)
- 关键词：砂岩储集层 ; sandstone reservoirs ; 非常规天然气 ; unconventional gas ; 中国 ; China
- 页码：p.7-16
- 图表：8 illus., 22 refs.
- 分类号：1003
- issnNo：ISSN1000-0976
- isbnNo：CN51-1179/TE
摘要
Unconventional oil and gas exploration and development have become highlights but new challenges in present oil and gas sector in China.In order to get a better understanding of some basic concepts concerned,exploration orientation,as well as guidance for better exploration strategies,a brief review was made of unconventional oil and gas geology in China.Because the qualitative changing process of clastic rocks densification is closely related to hydrocarbon pooling and enrichment,which have always been ignored by scholars,various hydrocarbon pooling modes were first discussed of conventional sandstone,dense sandstone,and super tight sandstone reservoirs.Then,a brief analysis was made of unconventional oil and gas geology in China,focusing on the importance of geological history.Finally,through a comparative analysis of unconventional hydrocarbon geological characteristics between the USA and China,it was discovered that apart from such innovative technologies as horizontal drilling and multi-stage fracturing treatment,rapid progress in the US shale gas is also attributed to the peculiar but favorable geological conditions with continuously steady tectonic movement after the marine shales were deposited in the continental margins and inland basins in North America.It is concluded that the primary unconventional hydrocarbon resources are better than those in the USA,but due to the later-period depression,strong structural deformation,and even being superimposed and buried deep over and over again,the exploration and development of unconventional hydrocarbon resources in China have become much complicated.On this basis,it is recommended that such geological features should be better understood,technological innovation should be highlighted,and exploration work should be done gradually in levels from the easy to the difficult.
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