渝东南渝科1井下寒武统富有机质页岩发育特征与含气量

doi:10.11743/ogg20130102

Abstract

Abstract:

Lower Paleozoic marine shale is widely distributed in Southeast Chongqing and features in large thickness,shallow burial depth and high organic abundance.The information from Well Yuke 1 helps us to well understand the characteristics and gas potential of the dark shale.The thickness of dark shale in the Cambrian Niutitang Formation is 50.2 m in total.Our studies reveal that the shale has favorable hydrocarbon accumulation conditions,with an average total organic carbon content(TOC) of 5.63% and an average vitrinite reflectance(R_o) of 3%.Calculation through logging analysis,isothermal adsorption test and linear regression shows that the total gas content of the shale is within the range of 1.0-3.5 m³/t.Well Yuke 1 demonstrates that the Niutitang Formation dark shale is characterized by high organic content,high maturity and large gas content,indicating great potential of shale gas resources.

Key words: shale gas, marine shale, gas content, Well Yuke 1, Southeast Chongqing

CLC Number:

TE132

Xie Chen, Zhang Jinchuan, Li Yuxi, Wang Xiaohong. Characteristics and gas content of the Lower Cambrian dark shale in Well Yuke 1, Southeast Chongqing[J]. Oil & Gas Geology, 2013, 34(1): 11-15.

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Characteristics and gas content of the Lower Cambrian dark shale in Well Yuke 1, Southeast Chongqing

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