Petroleum Reservoir Evaluation and Development >
2022 , Vol. 12 >Issue 1: 160 - 170
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2022.01.014
3D digital outcrop characterization and significance of petroleum geology of the early Triassic Yinkeng Formation Section in Jingxian County of southern Anhui
Received date: 2021-06-01
Online published: 2022-03-24
The oil and gas exploration of the Early Triassic Yinkeng Formation with wide distribution in the Jingxian County of the southern Anhui is relatively lagging. Based on the outcrop, well core and test analysis data, the depositional characteristics, hydrocarbon generation conditions and reservoir conditions of the Yinkeng Formation in southern Anhui are discussed. Using the “UAV stereo photography”, an innovative digital survey of the outcrop can be carried out to extract structural and sedimentary information. Combined with the artificial geology survey and the section digitization of the outcrop, the Yinkeng Formation can be divided into 16 sub-layers. The lithological of Yinkeng Formation is generally consist of gray mud limestone, conglomerate limestone and conglomerate limestone, with black and black gray mudstone. The cumulative thickness of the Yinkeng Formation is 43.8 meters with the TOC content ranging from 0.38 % to 2.21 % and the vitrinite reflectance ranging from 0.95 % to 1.21 %, indicating that the shales of the Yinkeng Formation is good source rocks and has a hydrocarbon potential. The porosity and permeability of limestones in the Yinkeng Formation range from 0.928 % to 2.626 %, and 0.12×10-3 μm2 to 3.22×10-3 μm2, respectively. The limestone intervals have under-developed matrix pores and low permeability, but have developed micro-fractures. Therefore, slopes and open shelf are favorable sedimentary facies with “self-generation and self-storage” petroleum system, and the Yinkeng Formation has large hydrocarbon potential.
Lei ZHOU , Xingqiang FENG , Shujing BAO , Yuanlong TAN , Lin WU , Linyan ZHANG . 3D digital outcrop characterization and significance of petroleum geology of the early Triassic Yinkeng Formation Section in Jingxian County of southern Anhui[J]. Petroleum Reservoir Evaluation and Development, 2022 , 12(1) : 160 -170 . DOI: 10.13809/j.cnki.cn32-1825/te.2022.01.014
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