基于沉积微相小层剩余油储量计算方法  

Method for Reserves Calculation for Remaining Oil in Sublayers Based on Sedimentary Facies

作　　者：王超 

机构地区：[1]中石油大庆油田有限责任公司第五采油厂,黑龙江大庆163513

出　　处：《长江大学学报（自然科学版）》2018年第15期37-41,共5页Journal of Yangtze University(Natural Science Edition)

基　　金：国家科技重大专项(2011ZX05013-006)

摘　　要：随着高含水期油田可采储量日益减少,剩余油储量精细计算的重要性日益突出。由于开发区井网密度大,地质、测井资料齐全的优势,结合沉积微相研究成果,可利用三角网格面积法计算任意面积,再根据含油饱和度、孔隙度等参数,通过容积法来计算剩余油储量。上述方法解决了定量确定每口井控制的每个小层、不同沉积相剩余油分布等难题,在剩余油储量计算过程中具有快捷、灵活、实用等特点。通过确定每口单井不同沉积相小层的剩余油储量,可以准确确定整个区域的剩余油分布。研究区Y区块应用该方法,在剩余油富集区设计并完钻加密井11口,平均单井有效厚度3.6m,投产初期日产液34.1t,日产油11.8t,综合含水率65.5%。该方法计算的剩余油储量结果符合地质认识,与动态开发结果基本一致。The importance of precise calculation of remaining oil reserves became more and more important,with the decreasing of the recoverable reserves of high water content oil field.Due to the advantages of high density of well pattern,geology and complete logging data in the development zone,combined with the research achievements of sedimentary facies,the triangle mesh area method could be used to calculate any area and the remaining oil reserves could be calculated by volume method according to oil saturation,porosity and other parameters.the residual oil reserves could be calculated by volumetric method.The above methods could be used to solve the problems of quantitative determination of each layer controlled by a well and the distribution of the residual oil in different sedimentary faces.It had the characteristics of fast,flexible,practical and so on in the residual oil reserves evaluation.By determining the remaining oil reserves of each sublayer of each well,the remaining oil distribution in the whole area could be accurately determined.This method is used in Block Y of the studied area.In the oil residual oil enriched region,11 infill wells are designed and drilled.The average effective thickness of single well is 3.6 m.At the initial stage of production,the daily liquid production is 34.1 t,and daily oil production is 11.8 t,the comprehensive water content is 65.5%.The results of residual oil reserves calculated by this method is basically consistent with geological understanding and dynamic development results.

关 键 词：任意面积 沉积微相 单井小层剩余油储量 剩余油分布 储量评价 

分 类 号：TE15[石油与天然气工程—油气勘探]