点坝侧积层精细划分方法  

THE METHOD OF FINE DIVISION OF LATERAL ACCRETION BEDDING IN POINT BARS

作　　者：辛治国[1,2] 肖建新[1] 冯伟光[2] 黄文辉[1] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]胜利油田分公司地质科学研究院,山东东营257015

出　　处：《大庆石油地质与开发》2009年第6期32-36,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：w基金项目：中石化十条龙项目（P06078）资助.

摘　　要：油田开发到后期，挖潜的对象已经细化到小层，甚至是单一韵律层，层内非均质性研究成为当前的热点。根据曲流河点坝侧积层的岩性、物性特征，河流相储层中的侧积层一般可分为泥质侧积层、灰质（钙质）侧积层和物性侧积层，由于这3种侧积层对流体运移影响程度不同，剩余油的分布也有差异。因此，提出综合利用自然伽马变化梯度、微梯度变化梯度、微电位变化梯度、微电极幅度差、声波时差变化梯度、井径变化梯度等参数识别侧积层性质，并建立了3种侧积层的识别模式。在孤岛油田利用水平井挖潜侧积层上部剩余油的过程中，利用这一方法优选泥质侧积层及厚度较大的物性侧积层发育的区域部署水平井，取得了良好的效果。In later period of oilfield development, the targets of potential tapping are detailed to sublayers, even single rhythmic layers. Study on heterogeneity within layers becomes focus at present. Based on litholigic and phys- ical features of point bar lateral accretion bedding of meandering river, lateral accretion bedding in the reservoir of fluvial facies generally can be shale l limy （calcareous） and physical property lateral accretion beddings. Since the effects of 3 kinds of lateral accretion beddings on fluid migration are different, remaining oil distribution also are different. Thus, comprehensive use of several parameters including gamma ray variation gradient, micro - gradient variation gradient, micronormal variation gradient, microelectrode amplitude difference, SDT variation gradient and well diameter variation gradient are provided to identify lateral accretion bedding property, and identification pat- terns of 3 types of lateral accretion beddings are established. In the process of potential tapping of upper remaining oil in lateral accretion bedding in Gudao Oilfield by horizontal well, the horizontal well is deployed in shale lateral accretion bedding and physical lateral accretion bedding development areas with large thickness by using this method.

关 键 词：点坝 构型 泥质侧积层 灰质侧积层 物性侧积层 

分 类 号：TE121[石油与天然气工程—油气勘探]