特高含水期厚油层动用状况及注水无效循环对开发效果影响分析  

The Influences of Thick Reservoir Production Status and Ineffective Circulation of Waterflooding at High Water-cut Stage on the Effect of Oil Development

作　　者：管错 石成方[1] 王继强[1] 胡水清[1] 王鸣川[2] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石化勘探开发研究院,北京100083

出　　处：《长江大学学报（自科版）（中旬）》2016年第5期54-58,5,共5页Journal of Yangtze University(Nature Science Edition)

基　　金：国家科技重大专项(2011ZX05010-002)

摘　　要：利用有效介质电阻率模型求取的含水饱和度以及储层参数解释模型求取的束缚水饱和度,确定出细分储层驱替状况的依据——驱油效率,并给出厚油层内部划分出4个不同驱替效率分区的驱替效率界限。基于北三西区块某油田正韵律厚油层物性特征建立油藏地质概念模型,利用数值模拟方法研究厚油层整个开发过程中的驱替状况,精细化分析了整个开发过程中特别是进入特高含水期后,厚油层内部驱替状况的差异性。通过利用数理统计的方法,得出开发过程中各个驱替分区的区域范围、过水量以及产油量随含水率上升的变化状况,判断无效注水循环出现的时机。基于数值模拟结果和实际统计数据,针对无效水循环对储层开发效果的影响进行了分析,得出无效水循环对油田开发效果的影响主要体现在抑制低渗透层、稀释有效产出层以及油田开发成本巨大3个方面。An effective medium resistivity model was used to derive a model of water saturation and reservoir parameters for obtaining a irreducible water saturation for determining the basis of fine reservoir classification——oil displacement efficiency,by which the limits of 4areas for dividing different displacement effects were provided.Based on the property of a positive rhythm thick reservoir in the west of Block Beisan,ageologic conceptual model was established,a numerical simulation method was used to study the flooding status of thick reservoir in the whole development process,and carefully analyze its oil flooding difference in the whole development process,especially at the late stage of high water content.A mathematical statistical method was used to obtain the areal coverage,water crossing rate and the of oil production changes with the increasing of water content in each area during the development,judge the time of ineffective waterflooding circulation.Based on the result of numerical simulation and actual statistical data,influence of ineffective waterflooding circulation on the development effect is analyzed,the result indicates that the influence of ineffective water circulation on the development effect includes 3aspects,such as the inhibition of low permeability reservoirs,dilution of effective producing layers and oilfield development cost.

关 键 词：特高含水 正韵律厚油层 注水开发 无效循环 驱替分区 

分 类 号：TE331.3[石油与天然气工程—油气田开发工程]