高分辨率层序地层学在河、湖、三角洲复合沉积体系的应用——以朝阳沟油田扶余油层开发区块为例  

The Application of High-Resolution Sequence Stratigraphy in Multiplex Deposition System of the River,Lake and Delta——To Take the Development Block of Fuyu Oil Layer in Chaoyanggou Reservoir for Example

作　　者：张世广[1] 柳成志[1] 卢双舫[1] 张雁[1] 吴高平[1] 刘秋宏[1] 

机构地区：[1]大庆石油学院地球科学学院,黑龙江大庆163318

出　　处：《吉林大学学报（地球科学版）》2009年第3期361-368,共8页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(40572079)

摘　　要：运用高分辨率层序地层学原理和方法,结合探井及密井网开发井资料,在朝阳沟油田朝1-朝气3区块扶余油层识别出向上"变深"、向上"变浅"、对称型及其不同可容纳空间条件下的7类共41个短期基准面旋回,并以沉积动力学观点详细剖析了其成因及特征。按照短期基准面旋回的结构类型、叠加样式组合了7个中期基准面旋回,并结合区域标志层识别出2个长期基准面半旋回,进而建立了高分辨率层序地层格架。本区长期基准面下降半旋回砂体总体不发育;在长期基准面上升半旋回早期发育的河流相砂岩厚度,有效厚度均较大,砂地比高,含油性好,且随长期基准面的上升逐渐变为三角洲、滨浅湖环境,砂体及含油性等逐渐变差。在各中期基准面由下降到上升的转换面附近砂体发育程度及其含油性在整个中期基准面旋回中相对最好。Applying the principles and methods of high-resolution sequence stratigraphy, and combining with the data of exploration wells and development wells in encrypted network of wells, the authors identified 41 short-term base-level cycles of 7 types, which were formed under the conditions of deeping upward, shallowing upward, symmetrical in different accommodation space in Fuyu oil layer of Chao 1 - Chao gas 3 blocks, and makes detailed analysis on the genesis and characteristics based on the sedimentary dynamics. According to the structural feature and stacking pattern of short-term base-level cycle, the authors established seven medium-term base-level cycles and identified two long-term base-level hemicycles by accompanying local indicator layers, and thus established the high-resolution sequence stratigraphic framework. In the study area, sand body is generally absent in the long-term base-level fall hemicycles, but in the early long-term base-level rise hemicycles, the thickness and effective thickness of sand of river-facies are significant, ratios of sand to mud are high, oiliness is good, and with the longterm base-level rising, the sedimentary environment turned to the delta system, the shore lake and the shallow lake, sand and oiliness gradually decrease. Moreover, each medium-term base-level, sand and its oilness in the transform zone from subsidence to elevation developed relatively best in the whole medium-term base-level cycle.

关 键 词：高分辨率层序地层学 基准面旋回 扶余油层 沉积环境 砂体 含油性 

分 类 号：P539.2[天文地球—古生物学与地层学] P618.13[天文地球—地质学]