石油勘探与开发 >

2018 , Vol. 45 >Issue 5: 785 - 794

DOI: https://doi.org/10.11698/PED.2018.05.04

油气勘探

富油凹陷油气分布有序性与富集差异性——以渤海湾盆地济阳坳陷东营凹陷为例

  • 王永诗 ,
  • 郝雪峰 ,
  • 胡阳
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  • 1. 中国石化胜利油田分公司,山东东营 257001;
    2. 中国石化胜利油田分公司勘探开发研究院,山东东营 257015
王永诗（1964-）,男,山东邹平人,博士,中国石化胜利油田分公司教授级高级工程师,主要从事油气地质综合研究与勘探工作。地址：山东省东营市东营区济南路125号,胜利油田分公司,邮政编码：257001。E-mail：wangysh623@sina.com

收稿日期: 2018-03-29

  网络出版日期: 2018-08-21

基金资助

国家油气重大科技专项“渤海湾盆地精细勘探关键技术”（2016ZX05006-003）; 中国石化股份公司项目“济阳坳陷油气聚集规律及精细评价关键技术”（ZDP17008）

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Orderly distribution and differential enrichment of hydrocarbon in oil-rich sags: A case study of Dongying Sag, Jiyang Depression, Bohai Bay Basin, East China

  • WANG Yongshi ,
  • HAO Xuefeng ,
  • HU Yang
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  • 1. Shengli Oilfield Company, Sinopec, Dongying 257001, China;
    2. Research Institute of Exploration and Development, Shengli Oilfield Company, Sinopec, Dongying 257015, China

Received date: 2018-03-29

  Online published: 2018-08-21

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摘要

以渤海湾盆地济阳坳陷东营凹陷为对象,在精细地质建模的基础上,以关键成藏要素演化为主线,开展压力-流体-储集性等成藏要素的联动演化及其耦合控藏作用研究,揭示油气分布有序性及富集差异性的内在机制。断陷盆地沉积体系有序性的发育是油藏有序性分布的基础,压力结构的连续性是控制油藏有序性分布的关键。从凹陷中心到边缘,凹陷、二级层序及大规模沉积体系内油藏类型均呈岩性油藏—构造油藏—地层油藏有序分布的特征。酸碱交替作用控制了陡坡带砂砾岩体扇中优质储集层的发育,形成了扇根封堵、扇中富集的油气富集模式,其中扇根与扇中之间的突破压力差决定了油藏富集程度;酸性流体作用控制了滩坝砂和浊积岩优质储集层的发育,烃源岩生烃超压与储集层改善过程中形成的低压所产生的压力差为油气充注提供动力,形成了烃源岩超压控制油气充满度的“压吸”充注机制。研究结果对于成熟探区的精细勘探具有指导和借鉴意义。图15表1参27

关键词： 断陷盆地; 油藏分布有序性; 油气富集差异性; 压力-流体-储集性耦合控藏; 渤海湾盆地; 东营凹陷

本文引用格式

王永诗 , 郝雪峰 , 胡阳 . 富油凹陷油气分布有序性与富集差异性——以渤海湾盆地济阳坳陷东营凹陷为例[J]. 石油勘探与开发, 2018 , 45(5) : 785 -794 . DOI: 10.11698/PED.2018.05.04

Abstract

Based on fine geological modeling and taking the evolution of key reservoir-forming elements as the main line, the mechanism of orderly distribution and differential enrichment of hydrocarbon was revealed by studying the joint evolution and coupling effect of pressure, fluid and reservoir properties. Orderly development of sedimentary systems in a rift basin is the base of orderly distribution of reservoirs, and the continuity of pressure structure is the key to controlling orderly distribution of reservoir. From the sag center to the margin, in the sag, second-order sequence and large-scale sedimentary system, the reservoirs appear in an orderly distribution from lithologic reservoir to structural reservoir to stratigraphic reservoir. Alternative acid and alkaline actions controlled the development of high quality reservoirs in the mid-fan sandy conglomerate bodies in the steep slope, resulting in the oil and gas accumulation pattern of sealing at the root fan and enrichment at the mid-fan, in which the breakthrough pressure difference between root fan and mid-fan determines the reservoir enrichment level. The action of acidic fluid controlled the development of high quality reservoirs in beach bar sand and turbidite. The pressure difference between high-pressure source rock caused by pressurization of hydrocarbon generation and low-pressure reservoir caused by reservoir improvement provided driving force for oil and gas charging, giving rise to the pressing-absorbing oil and gas charging mechanism controlled by source rock overpressure. The research results have guidance and reference significance for fine exploration in mature exploration areas.

Key words： rift basin; reservoir orderly distribution; oil and gas differential enrichment; pressure-fluid-reservoir coupling effect; Bohai Bay Basin; Dongying Sag

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