双物源下曲流河—浅水三角洲沉积砂体展布及演化规律——以尚家—太平川地区泉三段为例

发布时间：2018-03-19 18:45

本文选题：双物源　切入点：砂体　出处：《东北石油大学学报》2017年03期 　论文类型：期刊论文

【摘要】：以探井、岩心及储层物性资料为基础,采用重矿物分析及砂地比分析方法,确定松辽盆地尚家—太平川地区泉三段物源方向;结合双物源控制分析砂体沉积相及沉积砂体类型,通过砂体精细解释及沉积背景分析,揭示不同砂体的平面展布特征,分析其演化规律并建立沉积模式。结果表明:尚家—太平川地区泉三段主要由南、北方向物源控制;研究区可识别曲流河相、三角洲相两种沉积相,其中三角洲相沉积最为发育;沉积砂体类型可细分为曲流河道、三角洲平原分支河道和三角洲前缘水下分支河道;砂体垂向分布受双物源控制,顺物源方向砂体连通性好,多期河道相互叠置,逆物源方向砂体呈透镜状发育,砂体横向分布存在"分段"特征。研究区泉三段由浅水三角洲平原逐渐向曲流河沉积转换,反映水体由深变浅的一次湖退沉积过程,为该区域油气勘探提供依据。
[Abstract]:Based on the physical property data of exploration wells, cores and reservoirs, the source direction of the third member of spring in Shangjia-Taiping Sichuan area of Songliao Basin is determined by using the method of heavy mineral analysis and sand to ground ratio analysis, and the sedimentary facies and types of sedimentary sand bodies are analyzed in combination with the control of two sources. Through fine interpretation of sand bodies and analysis of sedimentary background, this paper reveals the plane distribution characteristics of different sand bodies, analyzes their evolution rules and establishes sedimentary models. The results show that the third member of spring in Shangjia-Taiping Chuan area is mainly controlled by the source in the south and north directions. In the study area, meandering river facies and delta facies can be identified, among which delta facies are the most developed, sedimentary sandbody types can be subdivided into meandering channel, delta plain branch channel and delta front underwater branch channel. The vertical distribution of sand body is controlled by two material sources. The sand body is connected well in the direction of material source. The channel superposes each other in many phases, and the sand body develops in the direction of inverse material source in a lenticular form. The horizontal distribution of sand bodies has "segmental" characteristics. The third member of the Quan formation in the study area is gradually transformed from shallow delta plain to meandering river sedimentation, which reflects the process of lake retrogression of water body from deep to shallow, which provides the basis for oil and gas exploration in this area.
【作者单位】：长江大学地球科学学院;中国石化胜利油田分公司石油开发中心有限公司;中国石油地质调查局武汉地质调查中心;
【基金】：大庆油田有限责任公司勘探开发研究院项目(DQYT-1201002-2011-JS-1219)
【分类号】：P618.13

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