海上油田开发早期储层构型研究及应用——以渤中A油田X沉积体为例

发布时间：2018-04-03 23:43

本文选题：海上油田　切入点：层序地层学　出处：《海洋地质前沿》2016年11期

【摘要】：渤海新近纪浅水三角洲沉积储层纵横向变化快、隔夹层发育,在少井条件下如何开展储层展布研究及水平井部署是海上油田开发早期亟待解决的问题。以渤中A油田浅水三角洲相X沉积体为例,据岩心、测井、地震等资料分析储层沉积特征,在高分辨率层序地层学指导下细分成因单元,分析单砂体对应测井、地震波形特征并刻画其展布。研究区储层类型以叠置分流河道、河口坝及河道间沉积为主,结合高分辨率地层学将目的层划分为1个短期旋回、4个超短期旋回,反映了一套基准面逐渐下降至暴露环境,后基准面上升至再次湖泛的过程。根据储层沉积特征、地震响应特征和复合砂体精细构型研究,识别出复合砂体的3种接触关系,同时对X沉积体进行了单河道识别和隔夹层分布规律研究,将X沉积体细分为3期单元砂体,并总结出3种储层结构类型,结合已有水平井的生产动态特征,提出X沉积体水平井部署的4种开发模式,有效指导了开发井实施。
[Abstract]:In the Neogene shallow water delta sedimentary reservoir in Bohai Sea, the vertical and horizontal direction changes rapidly and the intercalation is developed. How to develop reservoir distribution and horizontal well deployment under the condition of few wells is an urgent problem to be solved in the early stage of offshore oilfield development.Taking the X sedimentary body of shallow water delta facies in Bozhong A Oilfield as an example, the sedimentary characteristics of reservoir are analyzed according to core, logging and seismic data. Under the guidance of high resolution sequence stratigraphy, genetic units are subdivided to analyze the corresponding logging of single sand body.The characteristics of seismic waveform and its distribution are described.The reservoir types in the study area are mainly superimposed distributary channel, estuarine dam and interchannel sedimentation. Combined with high resolution stratigraphy, the target layer is divided into a short cycle and four ultra short term cycles, which reflects the decreasing of a set of datum level to exposed environment.The process of rising to the level of the lake again.According to reservoir sedimentary characteristics, seismic response characteristics and fine configuration of composite sand body, three contact relationships of composite sand body are identified. At the same time, single channel identification and intercalation distribution law of X sedimentary body are studied.X sedimentary body is subdivided into 3 stage unit sand bodies, and three reservoir structure types are summarized. Combined with the production dynamic characteristics of existing horizontal wells, four development models of horizontal wells in X sedimentary body are put forward, which effectively guide the implementation of development wells.
【作者单位】：中海石油(中国)有限公司天津分公司渤海石油研究院;
【分类号】：TE53;P618.13

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