摘要
曲流河复合砂体的沉积模式、级次和中低渗透性构型界面影响储层流体动态特征和剩余油分布。以渤海Q油田明化镇组R13油层为研究对象,基于以地震资料为主的研究方法,建立构型界面地质模型,分析构型界面特征,研究曲流河复合点坝级别构型界面的渗透率与几何形态对注采效果和剩余油分布的影响。结果表明:地震识别复合砂体构型地质模型能够反映物源变化和构型界面分布特征,砂体构型界面渗透率权重接近0时,阻隔作用显现;单河道级别界面长度超过3倍井距时,阻隔作用影响显著;界面纵向完全隔断整个油层时,有阻隔作用。该结果对河流相砂体特征研究及剩余油预测具有指导意义。
Sedimentary pattern,level,and shaly architecture interfaces with low permeability of complex sandy bodies in fluvial and delta reservoirs affect fluid dynamic behavior and remaining oil distribution.R13 Oil Layer of the Q Oilfield in the Bohai Sea is taken as the mechanic model.The seismic-based approach is used to explore 3D seismic data,build geological models embedded with the interfaces,and quantitatively analyze models with different distribution of interfaces through numerical simulation,revealing the rules of deploying optimal well network and well spacing.The conclusions of this study show that geological models containing shaly architecture interfaces obtained with 3D seismic can reveal the source changes and the feature of architecture interfaces.When the interface permeability is close to zero,the effect of interface preventing fluid flow is more obvious;when the length of interfaces in the level of single-river channels is three times of well spacing,the effect of interfaces becomes obvious.And the fluid flow prevention takes effect when the interfaces cut through the reservoir layer.This study shows the significance of characterizing fluvial sandy bodies and predicting the spatial distribution of remaining oil.
作者
王海峰
范廷恩
胡光义
徐云贵
胡叶正
WANG Haifeng;FAN Tingen;HU Guangyi;XU Yungui;HU Yezheng(State Key Laboratory of Offshore Oilfield Dvelopment,CNOOC Research Center,Beijing 100028,China;CNOOC Research Institute Company Limited,Beijing 100028,China;State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China)
出处
《东北石油大学学报》
CAS
北大核心
2021年第5期41-50,I0004,共11页
Journal of Northeast Petroleum University
基金
国家自然科学基金项目(41874167)
海洋石油高效开发国家重点实验室开放基金项目(2018OT-JY09)。
关键词
复合砂体构型
砂体级次
构型界面
剩余油
井网井距
complex sand architecture
sandbody level
architecture interface
remaining oil
well network and well spacing
