辽河西部凹陷雷家地区沙三段层序地层及沉积微相研究
发布时间：2019-04-02 04:17
【摘要】：辽河西部凹陷雷家地区具备形成良好圈闭的石油地质条件。研究以层序地层理论为指导,通过地震、测井、井震结合等手段进行对层序界面的识别与划分,将雷家地区沙三段划分为3个层序:SQ1、SQ2和SQ3,基本上对应于沙三下、沙三中和沙三上亚段。雷家地区主要沉积相类型为扇三角洲相及湖泊相。研究区沉积相在东西向变化较快,南北向变化较稳定。整个沙三段自东向西均依次发育扇三角洲平原、扇三角洲前缘、前扇三角洲和半深湖-深湖亚相等沉积体系;其中沙三下亚段(SQ1)扇三角洲沉积体系分布的面积最大,向西延伸最远;沙三上亚段(SQ3)次之;沙三中(SQ2)分布面积最小。综合辽河西部凹陷烃源岩、储集层、生储盖组合、油气运移和圈闭条件等分析,预测研究区存在4个有利区勘探带。
[Abstract]:The Lejia area in the western depression of Liaohe River has the petroleum geological conditions of forming good traps. Guided by the theory of sequence stratigraphy, the identification and division of sequence boundaries are carried out by means of seismic, well logging and well-seismic combination. The third member of the Shahejie formation in Leijia area is divided into three sequences: SQ1,SQ2 and SQ3, basically correspond to the lower part of the third member of the Shahejie formation. The upper sub-segment of es _ 3 and S _ 3. The main sedimentary facies in Leijia area are fan delta facies and lacustrine facies. The sedimentary facies in the study area changed rapidly in the east-west direction and stable in the south-north direction. From east to west, fan delta plain, fan delta front, front fan delta and semi-deep lake-deep lake sub-equal sedimentary system are developed from east to west. The distribution area of the fan delta sedimentary system in the lower part of the third member (SQ1) is the largest and extends westward, followed by the upper submember of the third member (SQ3), and the distribution area of the middle part of the third member (SQ2) is the smallest. Based on the analysis of source rocks, reservoirs, source-reservoir-cap assemblages, hydrocarbon migration and trap conditions in the western Liaohe depression, it is predicted that there are four favorable exploration zones in the study area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13
，
本文编号：2452231
[Abstract]:The Lejia area in the western depression of Liaohe River has the petroleum geological conditions of forming good traps. Guided by the theory of sequence stratigraphy, the identification and division of sequence boundaries are carried out by means of seismic, well logging and well-seismic combination. The third member of the Shahejie formation in Leijia area is divided into three sequences: SQ1,SQ2 and SQ3, basically correspond to the lower part of the third member of the Shahejie formation. The upper sub-segment of es _ 3 and S _ 3. The main sedimentary facies in Leijia area are fan delta facies and lacustrine facies. The sedimentary facies in the study area changed rapidly in the east-west direction and stable in the south-north direction. From east to west, fan delta plain, fan delta front, front fan delta and semi-deep lake-deep lake sub-equal sedimentary system are developed from east to west. The distribution area of the fan delta sedimentary system in the lower part of the third member (SQ1) is the largest and extends westward, followed by the upper submember of the third member (SQ3), and the distribution area of the middle part of the third member (SQ2) is the smallest. Based on the analysis of source rocks, reservoirs, source-reservoir-cap assemblages, hydrocarbon migration and trap conditions in the western Liaohe depression, it is predicted that there are four favorable exploration zones in the study area.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.13
，
本文编号：2452231
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