束鹿凹陷斜坡带沙三段扇三角洲特征及含油性  

The fan delta depositional characteristics and oil-bearing properties of the 3rd Member of the Shahejie Formations in the slope zone of Shulu Sag

作　　者：崔周旗[1] 吴健平[2] 李莉[2] 白红伟[3] 王海潮[2] 

机构地区：[1]西北大学地质学系,陕西西安710069 [2]华北油田公司勘探开发研究院,河北任丘062552 [3]华北油田公司第三中学,河北任丘062552

出　　处：《西北大学学报（自然科学版）》2003年第3期320-324,共5页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(40146024)

摘　　要：利用大量钻井的岩电组合特征和岩心观察结果,结合地震相和测井相模式,以及粒度、岩矿等分析资料,对束鹿凹陷斜坡带沙三段广泛分布的砾岩体成因进行了深入的分析。结果表明:这些砾岩体以冲积的形式前积到浅水湖盆中,平面上的三分性和纵向上的三层结构较明显,具有重力流和牵引流双重成因的沉积构造;以片状颗粒流或辫状水道砂砾岩为主要骨架,河口坝不发育;随物源区母岩性质的不同,导致扇三角洲的形成机制和沉积特征存在明显的差异性,形成以片状颗粒流为主导作用的扇三角洲和以河流作用居重要地位的扇三角洲。认为这两种扇三角洲储层物性的影响因素不同,储集空间、储集性能和含油性也各具特色。On the basis of abundant Lithologicelectric characteristic and core observation of wells drilled,and also through studying seismic and logging facies models, and numerous data of analyses, the conglomerate bodies, which are widely distributed over the slope zone of the 3rd Member of the Shahejie Formations in Shulu Sag, are studied. It is suggested that they belong to fan delta sedimentary systerms. These conglomerate bodies go forward the shallow lacustrine basins in the form of alluviation, their three parts in plan and three layer structures in vertical section can be clearly distinguished. They have the depositional structure formed by gravity flow and traction flow, the sheet grainflow and braid channel conglomerate are their main skeletal bodies,and the river mouth bars are difficult to be formed. But with the difference of the original Lithological properties in the provenance area, the forming mechanism and depositional characteristic of the fan delta have evident diversity. In the end, two types of fan delta can be distinguished. One is the fan delta, which sheet grainflow played a leading role, the second is the fan delta which fluvial influence held sway in the depositional process.The two types of fan delta have different factors to affect their physical natures,so their respective reservoir spaces,reservoir conditions, and oilbearing properties are distinctive.

关 键 词：束鹿凹陷 沙三段 扇三角洲 沉积特征 储集性能 

分 类 号：TE121.31[石油与天然气工程—油气勘探]