油气藏评价与开发 >
2023 , Vol. 13 >Issue 6: 844 - 854
DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2023.06.016
苏北盆地溱潼凹陷古近系戴一段油气富集规律
收稿日期: 2023-05-19
网络出版日期: 2024-01-03
基金资助
中国石化勘探导向项目“苏北盆地增储区带评价与有利目标优选”(YTBXD-CGKT-2022-001-005-HD);中国石化华东油气分公司科技项目“溱潼凹陷西斜坡三垛组、戴南组潜力分析及目标评价”(HDF/KJ2021-11)
Hydrocarbon enrichment regularity of the first member of Paleogene Dainan Formation in Qintong Sag, Subei Basin
Received date: 2023-05-19
Online published: 2024-01-03
邰浩 , 余文端 , 臧素华 , 史梦君 , 敬晓波 , 孙伟 . 苏北盆地溱潼凹陷古近系戴一段油气富集规律[J]. 油气藏评价与开发, 2023 , 13(6) : 844 -854 . DOI: 10.13809/j.cnki.cn32-1825/te.2023.06.016
The first member of the Dainan Formation in the Qintong Sag of the Subei Basin, characterized by its shallow burial and excellent physical properties, is identified as a key exploration target for high-quality hydrocarbon reserves. This study applies basic theories and technical methods such as sequence stratigraphy, sedimentology, and geochemistry, and integrates seismic, drilling core, and logging data to conduct a comprehensive analysis of sedimentary microfacies and oil and gas accumulation conditions under the sequence stratigraphic framework of the first member of Dainan Formation in Qintong Sag. The study shows that the fan delta front facies belt is a favorable area for the development of lithologic oil reservoirs, and the sand shale interbed near the largest lake flooding surface is the optimal reservoir cap combination vertically, The formation of oil and gas reservoirs in the first member of Dainan Formation is jointly controlled by the structural background, sedimentary facies belts, and regional strike slip structural belts. The study categorizes the oil reservoirs into two major categories and five subcategories. After drilling, it has been confirmed that large-scale integrated structural lithologic oil reservoirs have been discovered, and the exploration results are significant.
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