浅水三角洲砂体类型及沉积模式——以松辽盆地南部乾安地区白垩系姚家组一段为例

发布时间：2018-04-12 13:40

本文选题：松辽盆地 + 白垩系　；参考：《石油勘探与开发》2017年05期

【摘要】：基于露头、岩心、测井、录井数据,结合现代沉积研究,分析松辽盆地南部长岭凹陷乾安地区白垩系姚家组一段(简称姚一段)浅水三角洲不同相带内砂体类型及空间分布规律,并根据沉积过程建立浅水三角洲沉积模式。姚一段浅水三角洲平原主要发育由活动水道、边滩及汊口浅滩组成的主干分流河道砂体和复合砂体,三角洲前缘主要发育末端分流河道及河口坝砂体。三角洲在河口建设作用和随后的河流冲刷改造作用控制下逐步推进,早期三角洲前缘逐渐演化为三角洲平原,并被分流河道沉积改造,在前方河口部位不断沉积形成新的三角洲前缘。在上述沉积过程控制下,三角洲平原—三角洲前缘的主干分流河道规模逐渐减小、河口坝保存程度逐渐变好,不同类型砂体组合形成受分流河道控制的浅水三角洲沉积。乾安地区姚一段浅水三角洲主干分流河道内部的边滩和活动水道砂体储集条件最好,是岩性油藏的有利发育部位。
[Abstract]:Based on the outcrop, core, logging and logging data, combined with modern sedimentary research, analysis of Qian'an area of Cretaceous Yaojia formation in a southern Changling sag of Songliao Basin (referred to as Yao 1) shallow water delta sand bodies in different types and spatial distribution of facies, and according to the shallow water delta deposition model built Yao deposition process. A shallow water delta plain is mainly developed by the activities of main waterway, beach and the inlet shoal composed of distributary channel sand bodies and compound sand body, mainly developed delta front end of distributary channel and mouth bar. The delta at the mouth of the role of construction and subsequent fluvial transformation under the control of step by step, early triangle delta front gradually evolved into delta plain, and distributary channel sedimentary transformation, the formation of new delta front in the front parts of the continuous deposition. In the estuarine deposition process control, delta plain - three The main delta front distributary channel mouth bar size decreases gradually, the degree of preservation becomes better, different types of sand body assemblages formed by shallow delta river diversion control. Qian'an area Yao a shallow water delta distributary main beach and river channel sand body reservoir within the set of the best conditions, is a favorable development area the lithologic oil reservoir.

【作者单位】：中国石油大学(北京)地球科学学院;中国石油大学(北京)油气资源与探测国家重点实验室;中国石油长庆油田公司第五采油厂;中国石油吉林油田公司勘探开发研究院;中国石油大学(北京)石油工程学院;
【基金】：国家科技重大专项(2008ZX05030-005-01;2011ZX05004-004-007)
【分类号】：P618.13

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