What is it about?

Due to the difference of rock mechanics properties, detachment layers are usually developed in the transition zone between carbonate rock and shale, i.e. at the base of shale, in the tectonic deformation region. The cracks and microcracks in the detachment layer can connect more pores and improve the connectivity of the shale. Shale gas is more easily released from the shale matrix.

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Why is it important?

Our findings show that the presence of the detachment layer in the tectonic deformation region, especilly anticlines, makes the preservation conditions a very important factor that controls the shale gas resource potetial of the Wufeng-Longmaxi shales.


This article has greatly improved my logical thinking and academic self-confidence, because of the guidance of co-authors and the consistently high requirements of AAPG Bulletin.

Yijun Zheng
State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences

Read the Original

This page is a summary of: Organic geochemical characteristics, mineralogy, petrophysical properties, and shale gas prospects of the Wufeng–Longmaxi shales in Sanquan Town of the Nanchuan District, Chongqing, AAPG Bulletin, November 2018, American Association of Petroleum Geologists (AAPG),
DOI: 10.1306/04241817065.
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