Occurrence characteristics and relation to oil and gas distribution of bedding fractures in tight sandstone Online publication date: Wed, 07-Sep-2022
by Yande Zhao; Weili Wang; Ruiliang Guo; Jing Zhao; Xiao Hui; Weibin Wang
International Journal of Oil, Gas and Coal Technology (IJOGCT), Vol. 31, No. 2, 2022
Abstract: The existence of bedding fractures has a very important influence on the formation and distribution of tight sandstone oil and gas reservoirs. In this paper, the occurrence characteristics of bedding fractures and their influence on oil and gas distribution were preliminarily studied. The results show that bedding fractures are generally developed in high energy hydrodynamic environments such as river channel, sea (lake) bank and beach, in which parallel bedding is the main type. The existence of dark minerals leads to weak laminar adhesion. Beddings weak the bond force of laminae due to the existing of dark minerals. The pore development condition of bedding fractures is better than that of the upper and lower sandstone laminae. Influenced by these, bedding fractures become important channels for hydrocarbon migration. [Received: April 23, 2021; Accepted: January 2, 2022]
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