高柳斜坡带高精度层序地层及有利储层分布  

High-Precision Sequence Stratigraphy and Favorable Reservoir Distribution in Gaoliu Slope Zone

作　　者：刘海青[1] Liu Haiqing(PetroChina Jidong Oilfield Company,Tangshan,Hebei 063004,China)

机构地区：[1]中国石油冀东油田分公司,河北唐山063004

出　　处：《特种油气藏》2018年第6期77-82,共6页Special Oil & Gas Reservoirs

基　　金：“十三五”国家科技重大专项“南堡凹陷油气富集规律与增储领域”(2016ZX05006).

摘　　要：南堡凹陷高柳斜坡带已进入高勘探程度区,有效勘探岩性圈闭是研究的难点。为精确预测有利储层分布,基于钻井、测井和三维地震资料,运用高精度层序地层学研究方法,建立了高柳斜坡带沙三段高精度层序等时地层格架。高柳斜坡带沙三段由4个三级层序(SQ1—SQ4)构成,以其内部岩性突变面和稳定泥岩段为界进行高精度层序划分,识别出12个四级层序地层单元。通过层序内部含油气特征分析,明确了有利储层分布特征及控制因素,认为SQ2-2、SQ2-3、SQ3-1、SQ3-2和SQ3-3四级层序内水下分流河道和河口坝是有利含油储集砂体;以层序约束、砂体分布及构造匹配为基础对有利储层分布进行了预测。该研究可为岩性油气藏勘探提供地质依据。Effective exploration of the lithologic trap is a hot-spot in research for the Gaaliu slope zone in the Nanpu Sag with high exploration level In order to accurately predict the favorable reservoir distribution,the high-precision sequence stratigraphy is used to establish a high-precision sequence isochronous stratigraphic framework of the Shahejie-3 Member in the Gaoliu slope zone based on drilling,logging and 3D seismic data.The Shahejie-3 member is composed by four third-order sequences (SQ1-SQ4).The internal lithological mutation surface and steady mudstone interval are taken as boundaries to carry out a high-precision sequence division,which identifies twelve fourth-order sequence stratigraphic units.The favorable reservoir distribution patterns and the main-controlling factors were clarified through analyzing the internal hydrocarbon-bearing features.It is believed that the underwater distributary channels and the estuary dams in the fourth-order sequences of SQ2-2,SQ2-3,SQ3-1,SQ3-2 and SQ3-3 are favorable oil-bearing sandbodies.The favorable reservoir distribution was predicted based on the sequence constraints,sandbody distribution patterns and structural matching.

关 键 词：高精度层序地层 有利储层 岩性圈闭 高柳斜坡带 

分 类 号：P618.13[天文地球—矿床学]