[an error occurred while processing this directive] 世界地质 2020, 39(4) 870-877 DOI:   10.3969/j.issn.1004-5589.2020.04.012  ISSN: 1004-5589 CN: 22-1111/P

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东部凹陷
青龙台区块
沙河街组三段
成藏特征
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徐琛琛
PubMed
Article by Xu C
辽河坳陷东部凹陷青龙台区块沙河街组三段油气成藏特征
徐琛琛1,2
1. 南京大学 地球科学与工程学院, 南京 210023;
2. 中石油昆仑燃气有限公司天津分公司, 天津 300457
摘要: 辽河坳陷东部凹陷青龙台区块共发现古近系东营组、沙河街组一段(沙一段)、沙河街组三段(沙三段)和中生界共4套含油气层系,其中中浅层的东营组、沙一段勘探和开发程度较高。为保障油田持续稳产,急需对勘探程度相对较低的深层沙三段进行深入研究。结合前人研究,利用岩芯、录井和测井等资料分析得出,沙三段中下部发育的400~1 000 m暗色泥岩有机碳含量较高且处于成熟阶段;沉积时期发育扇三角洲及湖泊沉积体系;储层砂体累积厚度在300~1 000 m之间,总体为中低孔-低渗储层;油气藏类型主要是构造和岩性油气藏。通过对试油结果分析,有利的相带及构造局部高点为油气藏成藏的关键因素。
关键词 东部凹陷   青龙台区块   沙河街组三段   成藏特征  
Hydrocarbon accumulation characteristics of the third member of Shahejie Formation (Es3) in Qinglongtai block of eastern sag, Liaohe Depression
XU Chen-chen1,2
1. College of Earth Science and Engineering, Nanjing University, Nanjing 210023, China;
2. Tianjin Branch, Petro China Kunlun Gas Co., Ltd., Tianjin 300457, China
Abstract: In Qinglongtai block of eastern sag of Liaohe Depression, four sets of oil and gas bearing successions have been identified, i.e., Paleogene Dongying Formation(Ed), the first member of Shahejie Formation (Es1), the third member of Shahejie Formation (Es3) and Mesozoic, of which Dongying Formation and Es1 Formation have been well explored and developed. In order to ensure the sustainable and stable production of the oilfield, it is imperative to study the under explored Es3. Based on previous studies and the analysis of core, logging and other data, it is concluded that the 400~1 000 m thick dark mudstone developed in the lower part of the Es3 has a strong hydrocarbon generation capacity, the fan delta sedimentary system is relatively well developed, and the cumulative thickness of the reservoir sand body is between 300~1 000 m in thickness, with medium-low porosity and low permeability. Hydrocarbon accumulates in structural and stratigraphic traps. Through the analysis of the oil test results, the favorable sedimentary facies and the local structural high are the key factors of oil and gas accumulation.
Keywords: eastern sag   Qinglongtai block   Es3 Formation   hydrocarbon accumulation characteristics  
收稿日期 2020-01-17 修回日期 2020-07-28 网络版发布日期  
DOI: 10.3969/j.issn.1004-5589.2020.04.012
基金项目:

国家科技重大专项(2016ZX05006-005)、中国石油天然气股份有限公司重大科技专项(2017E-1601)资助。

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