T-R旋回层序在东濮凹陷前梨园地区Es_3^3亚段储层研究中的应用

TRANSGRESSION REGRESSION CYCLIC SEQUENCE OF THE SUB-MEMBER OF Es_3~3 IN QIANLIYUAN AREA,DONGPU DEPRESSION AND ITS APPLICATION TO RESERVOIR PREDICTION

依据对东濮凹陷前梨园地区测井、岩芯和高分辨率地震资料的综合研究 ,可将Es33亚段划分为三个湖进 -湖退 (T- R)旋回沉积层序 ,自底往上 ,Es33 层序发育辫状三角洲半深湖沉积体系 ,Es33 、Es33 层序则以扇三角洲半深湖、深湖湖底扇沉积体系为主。由沉积层序的区域对比和沉积体系的空间展布 ,建立起了前梨园地区 Es33亚段高分辨率等时地层格架 ,将储集岩层置于等时界面限定的沉积层序中进行划分和对比 ,可精确地解释砂体的成因及其横向变化规律。

On the basis of comprehensive research of log data,core samples and high resolution seismic data,three T R(Transgression Regression) sedimentary cycles are recognized in the Sub member of Es 3 3 in Qianliyuan area,Dongpu depression.Braided delta and deep lake depositional systems are developed in cycle Ⅰ,while the cycle Ⅱ and Ⅲ are mainly composed of fan delta,deep lake and lacustrine fan systems.A high resolution,equal time stratigraphic framework is established by regional correlation of sedimentary cycles and distribution of sedimentary systems.Sandbodies can be positioned in a cycle constrined by the equel time boundary,and divided and correlated,which provide reliably physical boundary for tracing and signing of sandbody′s response on seismic profile.The distribution of the reservoirs can be predicted with the analysis of sedimentary facies and multiple seismic information.