Study on source rock characteristics of Chang 7 member in eastern Xiaohe oil region of Yanchang Petroleum Company
The Chang7 section in the eastern oil region of Xiaohe has well-developed source rocks.In order to promote oil exploration in this area,it is necessary to deepen the understanding of source rocks in this area.This article studies the characteristics of source rocks in the region through methods such as rock pyrolysis,total organic carbon,and vitrinite reflectance.The results show that the organic matter abundance of the Chang 7 section in the eastern oil region of Xiaohe is generally a good type of source rock.The TOC variation range of mudstone samples is 3%～5%,and the hydrocarbon generation potential S1+S2 content of the samples is mainly distributed between 5～15mg/g,with an average content of 13.8mg/g.The organic matter type is type Ⅰ-Ⅲ,and the organic matter in the study area is generally mature in 7 segments.The generation and expulsion of hydrocarbons from this source rock provide a material basis for the accumulation and accumulation of oil in the region.
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