冀中坳陷洼槽地质特征及其与油气分布关系

doi:10.13810/j.cnki.issn.1000-7210.2016.05.020

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摘要基于三维地震、钻录井、地化等资料，对冀中坳陷洼槽进行了分类，并对不同类型洼槽沉积充填和地质结构特征进行了研究，评价了不同洼槽生烃潜力，探讨了洼槽地质特征与油气分布关系。结果表明：冀中坳陷共发育29个洼槽，根据古近系沉积充填特征，可划分为早期型、继承Ⅰ型、继承Ⅱ型和晚期型等4类，不同类型洼槽沉积充填差异悬殊，生烃潜力存在明显差异，其中继承Ⅰ型和继承Ⅱ型洼槽控制了富生烃洼槽的发育，进而控制了主要油气资源的空间分布；研究区洼槽地质结构类型多样，可划分为单断断超式、单断反转式、单断断阶式和双断地堑式等4种类型，洼槽结构控制油气运移主要方向，形成5种类型油气富集带，其油气藏类型及分布表现出明显差异性。综合洼槽沉积、结构及生烃潜力研究，预测出研究区7个富生烃洼槽及其12个有利油气富集带，为洼槽区岩性油气藏勘探提供理论依据。

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关键词 ：沉积充填, 地质结构, 生烃潜力, 洼槽, 冀中坳陷

Abstract：Based on 3D seismic, drilling, logging, and geochemical data, we conduct a research on geological characteristics of sub-sags and their relation with hydrocarbon distribution in Jizhong Depression. 29 sub-sags in Jizhong Depression are classified, their sedimentary filling and geological structure characteristics are studied, and their hydrocarbon generation potential is quantitatively evaluated. These 29 sub-sags developed in Jizhong can be divided into of 4 types:early-formed type, inherited-formed type Ⅰ, inherited type Ⅱ, and late-formed type. The sedimentary filling and hydrocarbon potential characteristics in these sub-sags are different, among which inherited Ⅰ and inherite Ⅱ sub-sags control the hydrocarbon rich development, and then control hydrocarbon spatial distribution. Jizhong Depression developed various sag structures which can be divided into 4 types named single-fault with on-lap, single-fault with bench, single-fault with reverse, and double-fault with graben. The sag structures control the main direction of hydrocarbon migration, and 5 types of oil and gas enrichment zone are formed with different reservoir types and distribution. Based on characteristics of structures and hydrocarbon potential, we predict hydrocarbon rich sags and 12 hydrocarbon enrichment zones to provide a theoretical basis for the future hydrocarbon exploration.

Key words： sedimentary filling geological structure hydrocarbon potential sub-sag Jizhong Depression

收稿日期: 2015-04-12

P631

基金资助:

本项研究受中国石油股份公司重大科技专项（2014E-35）、国家重大科技专项（2016ZX05006-003）联合资助。

通讯作者: 杨德相,河北省任丘市华北油田勘探开发研究院,062552。Email:yjy_ydx@petrochina.com.cn E-mail: yjy_ydx@petrochina.com.cn

作者简介: 杨德相,高级工程师,1966年生;1987年毕业于成都地质学院石油地质专业,获工学学士学位;现在华北油田勘探开发研究院从事油气勘探综合研究工作。

引用本文:

杨德相, 蒋有录, 赵志刚, 赵伟森, 李虹霖, 赵凯. 冀中坳陷洼槽地质特征及其与油气分布关系[J]. 石油地球物理勘探, 2016, 51(5): 990-1001. Yang Dexiang, Jiang Youlu, Zhao Zhigang, Zhao Weisen, Li Honglin, Zhao Kai. Geological characteristics of sub-sags and their relation with hydrocarbon distribution in Jizhong Depression. OGP, 2016, 51(5): 990-1001.

链接本文:

http://www.ogp-cn.com/CN/10.13810/j.cnki.issn.1000-7210.2016.05.020 或 http://www.ogp-cn.com/CN/Y2016/V51/I5/990

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