Exploration practice and cognitions of shale oil in Jiyang depression

doi:10.3969/j.issn.1672-7703.2017.04.001

Abstract

Abstract: Great success has been achieved for the exploration and development of marine shale oil in North America, revealing the significant value of industrial shale oil exploration and development. When shale oil exploration is practically carried out in the Jiyang depression which is the typical representative of continental faulted basin in eastern China, a series of technologies are adopted. It is revealed by the comprehensive source rock evaluation technology that the hydrocarbon generation in mud shale of saline lake is characterized by early hydrocarbon generation and high hydrocarbon-generating transformation ratio. It is confirmed by the mud shale micropore structure characterization technology that laminated lithofacies has the reservoir properties of high porosity, large pore diameter and good connectivity. And by virtue of the quantitative free oil evaluating technology, the differential enrichment mode of free oil in favorable lithofacies of mud shale in different sedimentary environments in the Jiyang depression is established. The shale oil in the Jiyang depression is compared with that in North America. It is indicated that in the Jiyang depression, the development of favorable lithofacies is the base of shale oil enrichment, appropriate evolution degree is the condition of shale oil enrichment, sufficient free composition is the key to shale oil enrichment, and good crushability is the guarantee of effective development. And finally, the shale oil zone selection and evaluation criterion suitable for the saline lake deposit within continental faulted depression in eastern China is prepared.

Key words: Jiyang depression, shale oil, saline lake, free oil, laminated lithofacies

CLC Number:

TE122.9

Sun Huanquan. Exploration practice and cognitions of shale oil in Jiyang depression[J]. China Petroleum Exploration, 2017, 22(4): 1-14.

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