鄂尔多斯盆地志靖—安塞地区长2油藏成藏主控因素分析

doi:10.3969/j.issn.1006-6535.2020.04.008

特种油气藏 ›› 2020, Vol. 27 ›› Issue (4): 54-59.DOI: 10.3969/j.issn.1006-6535.2020.04.008

鄂尔多斯盆地志靖—安塞地区长₂油藏成藏主控因素分析

冯顺彦^1,2, 张晓辉^1,2, 李成^1,2, 井向辉^1,2, 孙磊³

1.中国石油长庆油田分公司,陕西西安 710018;
2.低渗透油气田勘探开发国家工程实验室,陕西西安 710018;
3.中国石油长城钻探工程有限公司,辽宁盘锦 124010

收稿日期:2019-09-13 修回日期:2020-05-06 出版日期:2020-08-25 发布日期:2022-02-18
通讯作者: 李成(1984—),男,高级工程师,2006年毕业于长江大学石油工程专业,2009年毕业于成都理工大学,获硕士学位,现主要从事综合地质研究及油藏评价方面的工作。
作者简介:冯顺彦(1982—),男,工程师,2006年毕业于长江大学勘查技术与工程专业,2009年毕业于该校矿产普查专业,获硕士学位,现主要从事石油勘探及油田开发方面的研究工作。
基金资助:
国家科技重大专项“鄂尔多斯盆地致密油资源潜力、‘甜点'预测与关键技术应用”(2016ZX05046-005);中国石油重大科技专项“长庆油田5000万吨持续高效稳产关键技术研究与应用”子课题“鄂尔多斯盆地超低渗透致密油藏有效开发技术研究”(2016E-0505)

Hydrocarbon Accumulation Main-Controlling Factor Analysis of Chang₂ Reservoir in Zhijing-Ansai of Ordos Basin

Feng Shunyan^1,2, Zhang Xiaohui^1,2, Li Cheng^1,2, Jing Xianghui^1,2, Sun Lei³

1. PetroChina Changqing Oilfield Company, Xi'an, Shaanxi 710018, China;
2. State Engineering Laboratory for Exploration and Development of Low-Permeability Oil & Gas Fields, Xi'an, Shaanxi 710018, China;
3. CNPC Greatwall Drilling Company, Panjin, Liaoning 124010, China

Received:2019-09-13 Revised:2020-05-06 Online:2020-08-25 Published:2022-02-18

摘要/Abstract

摘要： 针对志靖—安塞地区长2油藏地质条件复杂,油气富集的主控因素不明确的问题,通过烃源岩、沉积相、优势砂体、运移通道、盖层及圈闭条件等综合研究,对长₂油层组沉积相、砂体分布规律、有利圈闭进行综合分析。结果表明:长₂油藏石油富集成藏受油源、不整合、低幅构造、沉积相及储层特征、盖层等多种因素的控制和影响;该区中部紧邻生烃中心,为成藏提供油源保障;延长组叠置储渗砂体是长₇烃源岩排除油气运移至长₂的主要通道,不整合面和裂缝是运移通道的有效补充;分流河道交汇处高渗砂体与近东西向排状鼻隆的匹配是石油聚集的有利场所,盖层与纵向砂体结构决定了石油主要富集在长₂Ⅰ³小层。长₂油藏在多因素的共同控制下,发育岩性、构造-岩性、弱构造-岩性等3种油藏类型,研究成果指明了长₂油藏下步勘探方向。

关键词: 鄂尔多斯盆地, 志靖—安塞地区, 长₂油藏, 成藏主控因素, 油藏类型

Abstract: In order to understanding the complex geology of Chang₂ oil reservoir in Zhijing-Ansai and determine the main-controlling factors of hydrocarbon enrichment, the sedimentary facies, sandbody distribution patterns, favorable traps and other hydrocarbon enrichment mechanisms were comprehensively analyzed by the researches on source-rock, sedimentary facies, favorable sandbodies, migration channels, trap conditions, etc. Result indicates that the hydrocarbon enrichment in Chang₂ oil reservoir are dependent on multiple factors, including hydrocarbon source, unconformity, low-amplitude structure, sedimentary facies, reservoir properties, caprock properties, etc. The matching between the high-permeability sandbodies at the junction of distributary channels and the near-east row nose-shaped uplift is favorable to hydrocarbon accumulation. The caprock and longitudinal sandbody structures result in the hydrocarbon enrichment in Chang₂Ⅰ³ sub-layer. There are lithology, structure-lithology and weak structure-lithology reservoir categories in Chang₂ oil reservoir due to multiple controlling factors. This research could provide certain guidance for the further exploration in Chang₂ oil reservoir.

Key words: Ordos Basin, Zhijing-Ansai, Chang₂ oil reservoir, hydrocarbon accumulation main-controlling factor, reservoir category

中图分类号:

TE121.1

冯顺彦, 张晓辉, 李成, 井向辉, 孙磊. 鄂尔多斯盆地志靖—安塞地区长₂油藏成藏主控因素分析[J]. 特种油气藏, 2020, 27(4): 54-59.

Feng Shunyan, Zhang Xiaohui, Li Cheng, Jing Xianghui, Sun Lei. Hydrocarbon Accumulation Main-Controlling Factor Analysis of Chang₂ Reservoir in Zhijing-Ansai of Ordos Basin[J]. Special Oil & Gas Reservoirs, 2020, 27(4): 54-59.

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鄂尔多斯盆地志靖—安塞地区长₂油藏成藏主控因素分析

Hydrocarbon Accumulation Main-Controlling Factor Analysis of Chang₂ Reservoir in Zhijing-Ansai of Ordos Basin

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