Q区块聚合物驱不同砂体叠置模式井组调整方法  

Well Group Adjustment Method for Polymer Flooding in Block Q with Different Sand Body Superimposed Modes

作　　者：姜贵璞[1] Jiang Guipu(No.4 Oil Production Plant ,Daqing Oilfield Co. ,Ltd.,Daqing Heilongjiang 163511)

机构地区：[1]大庆油田有限责任公司第四采油厂

出　　处：《中外能源》2019年第7期54-58,共5页Sino-Global Energy

摘　　要：砂体之间的垂向叠置模式以及与之相匹配的个性化的注入参数是影响聚驱效果的重要原因。在深入认识大庆长垣一类油层曲流河砂体沉积模式的基础上,充分利用精细地质研究成果,通过测井曲线形态及其所反应的旋回特征,对不同沉积单元的砂体垂向叠置模式关系进行研究,将典型区块划分为独立型、下切型、砂泥交互型和单一型4种砂体垂向叠置模式,通过研究不同砂体的沉积特性、渗透率分布特征,结合不同聚合物浓度与渗透率匹配关系图版,个性化设计单井注入参数,提高油层匹配率,改善油层动用状况,形成了不同砂体垂向叠置模式井组单井注入参数个性化设计方法和调整思路,取得了较好的开发效果。注入参数与油层匹配率达到95%以上,油层动用程度达到80%以上,含水最大降幅达到12个百分点以上,低值期长达21个月,提高采收率10个百分点以上,对比分类曲线达到C类标准。该方法对改善聚驱开发效果具有一定的借鉴意义。Vertical superimposed modes among sand bodies and corresponding injection parameters are the main influencing factors of polymer flooding.Based on an in-depth understanding of the sedimentary model of meandering river sand body in Class Ⅰ reservoirs in Daqing Placanticline,fine geological research results and logging curves and their reflected cycle characters were applied fully to study the relationship among the vertical superimposed modes of the sand bodies in various sedimentary units.The typical block was divided into stand-alone,incised,sand mud interaction and single four vertical superimposed modes.The sedimentary characteristics and permeability distribution of different sand bodies were studied.Combined with matching chart between different polymer concentrations and permeability ,personalized injection parameters for single well may be designed to enhance reservoir matching rate and to improve production.The personalized design method and thinking of single well injection parameters for the well group with vertical superimposed modes of various sand bodies were formed,and good results were achieved.The matching rate between injection parameters and reservoir was up to more than 95% and over 80% oil reservoirs were produced.The maximum reduction range of water cut reached more than 12%,the low value period was 21 months,and the enhanced oil recovery can reach 10% and higher.According to the classification curves ,it reached Class C level.The method can be used for reference to improve development effect of the polymer flooding.

关 键 词：砂体叠置模式 井组调整 渗透率匹配图版 注入参数 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]