基准面旋回格架控制下储层的非均质性特征  

Characteristics behind reservoir heterogeneity in framework of base level cycle

作　　者：吕鹏佶[1] LüPengji(Liaohe Oilfield Company,PetroChina,Panjin 124010,China)

机构地区：[1]中国石油辽河油田分公司,辽宁盘锦124010

出　　处：《黑龙江科技大学学报》2018年第2期181-184,共4页Journal of Heilongjiang University of Science And Technology

基　　金：国家科技重大专项(2011ZX05053);中国石油股份公司重大科技专项课题(2012E-30)

摘　　要：为揭示储层展布与物性变化规律,依据旋回沉积作用发育的转换面特征,将大民屯凹陷沈161块S23亚段划分为一个长期基准面上升半旋回、五个中期基准面旋回和59个短期基准面旋回,分析基准面旋回格架控制下的储层非均质性变化特征。结果表明,中期旋回呈现出明显规律性。中期旋回控制储层层间和平面非均质性,在基准面的上升初期及下降末期,砂体厚度较大,连续性较强,储层的物性发育较好。基准面上升到高部位处,因水动力弱导致砂体厚度薄、连续性差、储层物性较差。短期基准面旋回的对称型、非对称型和叠加型三种不同结构对层内物性变化模式及非均质性具有明显的控制作用。该研究可为精细油藏描述提供理论依据。This paper is concerned with an effort to identify the law underlying the distribution and physical change of the reservoir.The study building on the characteristics behind depositional conversion surface is focused on dividing S 2 3 sub-member of shen161 block in Damintun sag into 1 long-term base level cycle,5 medium-term base level cycles,and short-term base level cycles,and thereby analyzing the characteristics behind the variation of reservoir heterogeneity in the control of the framework of base level cycle.The results show that the medium-term cycle with an obvious regularity provides a control of the interlayer reservoir heterogeneity and the plane reservoir heterogeneity,suggesting that the early rising period and the late falling period of the base level see a greater sandstone body thickness,a better continuity and better-developed physical properties of reservoir;the period of higher base level is accompanied by a thinner sandstone thickness due to the lack of hydrodynamic force,a poor continuity and a less developed reservoir physical property;three different structural styles of short term base level cycle,such as symmetry,asymmetry,and superposition have an obvious control on reservoir property change model and heterogeneity.The research may provide a theoretical basis for the description of fine reservoir.

关 键 词：油田 储层 非均质性 基准面旋回 

分 类 号：P618.13[天文地球—矿床学]