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渤海湾盆地潜山油气富集特征与主控因素

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2015年第39卷 中国石油大学学报(自然科学版) V01.39 No.3 第3期 Journal of China University of Pe ̄oleum Jun.2015 文章编号:1673-5005(2015)03-0020—10 doi:10.3969/j.issn.1673—5005.2015.03.003 渤海湾盆地潜山油气富集特征与主控因素 蒋有录 ,叶 涛 ,张善文。,刘 华 (1.中国石油大学地球科学与技术学院,山东青岛266580;2.中海石油(中国)有限公司天津分公司,天津300452; 3.中国石化胜利油田分公司,山东东营257015) 摘要:以渤海湾盆地潜山油气勘探实践为基础,综合前人研究成果,系统对比分析不同凹(坳)陷潜山油气成藏条件、 油气富集差异性。并探讨其主要控制因素。研究表明:前古近纪构造演化造就了I、Ⅱ、Ⅲ型三类基底,新生代构造 差异演化形成了早期型、继承型和晚期型三类凹陷,凹陷演化的差异性控制了烃源岩层系由盆地外围早期型凹陷到 中心晚期型凹陷逐步变浅,由I类基底向Ⅲ类基底,优质储层规模逐渐减小,输导条件逐步变差;潜山油气的宏观分 布受前古近纪与新生代演化共同控制,主要富集在I、Ⅱ类基底与继承型、早期型耦合的富油气凹陷中;潜山油气的 富集程度受凹陷的富油气性、烃源岩层系、优质储层发育规模以及供油窗口等综合因素控制;对不同成藏条件进行 定量化,建立潜山油气藏形成的“源一储一导”三元耦合控藏模式,储集条件为首要控制因素。 关键词:潜山油气藏;成藏条件;富集特征;控制因素;定量评价;渤海湾盆地 中图分类号:TE 122.1 文献标志码:A 引用格式:蒋有录,叶涛,张善文,等.渤海湾盆地潜山油气富集特征与主控因素[J].中国石油大学学报:自然科学 版,2015,39(3):20—29. JIANG Youlu,YE Tao,ZHANG Shanwen,et a1.Enrichment characteristics and main controlling factors of hydrocarbon in buried hill of Bohai Bay Basin[J].Journal of China University ofPetroleum(Edition of Naturla Science),2015,39(3):20—29. Enrichment characteristics and main controlling factors of hydrocarbon in buried hill of Bohai Bay Basin JIANG Youlu ,YE Tao ,ZHANG Shanwen ,LIU Hua (1.School ofGeosciences in China University ofPetroleum,Qingdao 266580,China; 2.Chian National Offshore Oilifeld Corporation Limited—Tianjin,Tianjin 300452,Chian; 3.Shengli Oilifeld Company Limited,SINOPEC,Dongying 257015,China) Abstract:Based on exploration results and previous studies,the hydrocarbon accumulation conditions were summarized and the differences were compared in different sags of the Bohai Bay Basin.The results show that the pre—Cenozoic tectonic evolu— tion created three types of basement.Evolution of the Cenozoic formed three types of sags:basin of early ritf,basin of inherit— ance rift and basin of lately ritf.Evolution differences controlled the distirbution of source rock in the sag.The source rock gradually migrated to shallow depth from the periphery to the center of basin.The distribution of reservoir and transport condi— tion became poor gradually from type I basement to tpyeⅢbasement.Hydrocarbon enrichment is controlled by the pre-Cenozoic and Cenozoic evolution.Hydrocarbon mainly gathered in those sags with type I or type II basement and also with evolution type of inheritance or early irft basin.The hydrocarbon enrichment is controlled simultaneously by the source rock horizon,the scale of high quality reservoir and the formation of oil supplying window.Our study quantifies different hydrocarbon accumulation conditions,and suggests that three factors,including”source-reservoir-migration”which couple with each other,control the mode of the buried hill reservoirs,and the reservoir conditions are the main controlling factors. Keywords:buried hill reservoir;formation condition;enrichment characteristic;controlling factor;quantitative evaluation; Bohai Bay Basin 收稿日期:2014—11—20 基金项目:国家油气重大专项课题(201IZX05006—003) 作者简介:蒋有录(1959一),男,教授,博士,博士生导师,主要研究方向为油气藏形成与分布规律。E-marl:jiangyl@upc.edu.ca。 第39卷第3期 蒋有录,等:渤海湾盆地潜山油气富集特征与主控因素 \ 巅 棚髯!} 爨暑曩I 9‘\ 妊 阻棚荨!}扩爨鲁辫 ・27・ 完全起控制作用,即单因素与潜山油气藏储量百分 ∞∞如∞ 数的拟合程度不会很高。但将这些互相影响的单因 ∞ ∞的∞∞如 F =1.291F-8.356,R =0.772. (5) 式中,F为综合模型预测潜山油气储量百分数:F 为 素公式共同带入综合预测模型中。就会产生良好的 效果。以单因素分析为基础。通过多元线性回归的 方法,建立各成藏条件与潜山油气藏储量百分数 (反映凹陷级别潜山油气富集程度)的定量表征模 型: 实际潜山油气储量百分数。 整体来说,拟合的公式具有较高的相关性。实际 值与计算值的误差相对较小。其误差一般小于 10%,整体上误差在允许范围之内,证明模型建立合 理、可靠,表明潜山油气富集主要受“源一储一导”三 元耦合共同控制,而储集条件为首要控制因素。 F=一0.263F1+0.484F2—0.351F +48.197.(4) 姥\ 赣求陋嘲犟 蒜与辫 0 供烃差异系数l 鲫 ∞∞如∞ 加 k 蛐 优质储层百分数 /% ∞∞如∞ 0 籁 求 l皿 棚 耀 扩 震 毫 瓤 0 500 1 000 1 500 2 000 2 500 3000 3500 4000 源—储封隔体厚度l /m 图l1渤海湾盆地潜山油气藏富集程度单一因素分析图及误差分析 Fig.11 Single f_act0r analysis and error analysis of enrichment degree of buried hill reservoir in Bohai Bay Basin 5 结 论 (1)渤海湾盆地前古近纪与新生代构造演化差 异性明显,前古近纪印支运动、燕山运动是潜山圈闭 形成的两期重要运动。共同控制了I、Ⅱ、Ⅲ3类基 底的形成,新生代盆地的迁移性控制早期型、继承型 (3)潜山油气富集受烃源岩条件、储集条件以 及输导条件耦合控制,储层条件是首要控制因素,其 次是输导条件,对于富油气凹陷而言,烃源岩条件影 响相对较小。 参考文献: [1]蒋有录,卢浩,刘华,等.渤海湾盆地饶阳凹陷新近系 油气富集特点与主控因素[J].石油学报,2011,32 (5):791-796. 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