【作者】 华强；

【导师】 田世澄；

【作者基本信息】 中国地质大学（北京） ， 矿产普查与勘探， 2014， 博士

【摘要】 2014年国内原油对外依存度将上升至60%，而国内大多数油田相继进入高含水开发后期，稳产基础薄弱，针对国内石油短缺的严峻形势，如何有效的增产稳产成为石油工作者十分关心的重要话题。濮城油田西区沙二上2+3油藏注水开发时间长达三十多年，现在处于高含水期，剩余油赋存规律认识不清，而该区夹层较为发育，夹层对剩余油控制作用尚不清楚。在充分利用岩心、测井、分析化验、生产动态等资料的基础上，针对生产中出现的问题，对该区进行油藏描述与剩余油分布研究。研究结果如下：基本的构造格局保持不变，新增小断层7条。濮城油田西区沙二上2+3油藏属于三角洲前缘亚相，沉积微相可划分为河道微相、河道间微相、前缘席状砂微相、远砂微相、深湖-半深湖相等5种沉积微相。考虑泥质含量的影响对该区孔渗物性进行重新解释。结合取芯井资料与测井曲线研究，利用微电极、微梯度及自然伽马回返幅度建立不同夹层的定量识别标准。夹层的分布规律与距离物源的远近、沉积微相有一定的联系。距离物源距离的远近决定了夹层发育规模和夹层厚度大小。夹层集中发育在前缘席状砂及远砂微相中。前缘席状砂微相中，夹层稳定性在4种沉积微相中最好。对7个主力小层稳定夹层进行追踪，计算其对储量的控制作用，稳定夹层控制储量占濮城西区沙二上2+3油藏地质储量的18.01%。采用油藏数值模拟方法对概念夹层模型进行研究，研究了不同夹层参数对油藏开发效果的影响，通过正交试验确定夹层参数对油藏开发效果的影响程度大小。利用生产动态资料对剩余油进行定性研究，建立实际油藏数值模型对剩余油进行定量研究，分具体小层、不同小层类型、不同含水级别、不同剩余油饱和度范围及剩余油具体类型进行剩余油定量评价，寻找剩余油富集地区，寻找挖潜重点方向。鉴于夹层对剩余油具有较显著的控制影响作用，采用油藏数值模拟方法建立包含夹层的实际油藏模型，研究不同类型夹层对剩余油平面、纵向赋存规律的影响作用，为针对性挖潜措施的提出打下基础。2012年油藏描述开展以来，充分利用油藏描述研究成果，不断的将取得的新认识、新成果应用于油田实际生产开发中，已实施措施油井20井次，水井16井次，累计增油2287t，投入产出比1：1.69，具有良好的经济效益。针对稳定夹层上下油层存在较多剩余油的实际情况，对剩余油富集区油水井采取相应调整挖潜措施，并采用油藏数值模拟方法对各个方案进行开发预测。采收率提高幅度达6个百分点以上。更多还原

【Abstract】 The domestic interdependence coefficient of oil on foreign will ascend60%in2014,but thebackground of stable production is weak after most oilfields entered high-watercut productiontail,in view of severe condition of domestic oil shortage,how to stimulate and stablely yieldefficiently is an important topic of petroleum workmen.Over30years has elapsed since waterflood development of the upper S22+3resevoir inPucheng Oilfield，now it is in high watercut period.On the base of sufficiently utilizing drillingcores，well logging，test analysis，dynamic production and so on,research on reservoir descriptionand distribution law of remaining oil has been carried out in view of questions in development.Research results are as follows:Basal structure framework remains stationary,7minor faultshave been newly found.The lithosomic body of the upper S22+3resevoir in Pucheng Oilfield isdelta-plain deposit, sedimentary microfacies can be divided into river course, interchannel,deltafront sheet sand,far grit and lake muddy microfacies.Interpretation of physical property has beenproceeded once more，Interpretation model of porosity and permeability has been established inaccount of mud affect. Quantity recognition criteria of different interbeds has been built upthrough return amplitude of microelectrode，microinverse and combination gamma ray neutronlaterolog on the base of drillcore data and well logging.The distance from matter source andmicrofacies have certain connection with size and thickness of the interbeds. The distance frommatter source determines size and thickness of the interbeds.Interbeds centralize in sand sheetand far grit.Interbeds have the best stability in sand sheet of the four sedimentarymicrofacies.Stable interbeds trace has been proceeded in seven main sublayers,control effect ofstable interbeds on reserve has been calculated.Controlled reserve by stable interbeds accountsfor18.01%of the total geological reserve of he upper S22+3resevoir in Pucheng Oilfield.Conceptual interbeds by reservoir numerical simulation and the effect of different parameters ofinterbeds on development have been carried out.Its effect degree has been ascertained byregular-crossed trial.Quality research has been carried out by dynamic production performanceand reservoir numerical simulation bas been built and quantity research on remaining oil ofconcrete sublayer,different water-cut level&saturation and concrete form to find relativeenriching palce and to look for important tapping zones.In view of relatively prominent controleffect of interbeds on remaining oil,actual reservoir numerical simulation including interbeds basbeen built to do research about effect of different interbeds on palne and vertical oil distributionto pertinencely prepare for tapping measures. Since reservoir description in2012,by sufficiently utilizing research outcome,newknowledge and outcome have been applied in actual development,20well-time of productionwell and16well-time of injection well have been implemented,and oil gain increases by2287t,beneficial result is favorable with input/output ratio of1：1.69.In view of more remaining oil upand down stable interbeds,wells have been taken measures in enriching palce, and futuredevelopment has been forecasted, the recovery can be raised over six percentage points.更多还原