摘要
S油田是大庆长垣外围开发比较早的主力区块,储层以中低孔隙度渗透率砂泥岩为主,非均质性较强、注水开采方式多变,目前已进入中、高含水阶段。针对研究区储层类型多变的特点,基于水淹层导电规律,以压汞数据为依据,采用概率累积法将P油层划分为3类储层。提取对水淹信息较敏感的SP、Rt等测井曲线构建综合参数,并将其与储层物性结合得到含水率综合指数,用于定性判别储层水淹级别。在此基础上,提出以水驱油及相渗实验为依据,建立含水率与含水饱和度变化量ΔSw间的函数关系,确定水淹层定量解释标准。应用该方法对S油田P油层进行水淹层解释后,与密闭取心井水洗分析结论对比符合率达到81.8%,效果较好,能够满足水淹层测井解释及剩余油评价的需要。
The S oilfield is the main oil-producing block developed earlier in the Changyuan Periphery,Daqing oilfield.The lithology of the reservoir in S oilfield is dominated by sand- mudstone,the physical properties are medium-low porosity and permeability.In addition,the heterogeneity of its reservoir is strong,and the way of water flooding is changeable.At present, the oilfield has entered the middle and high water cut stage.According to the characteristics of reservoir types in the study area,based on the conductivity law of water-flooded layer and mercury pressure data,the P-oil layer is divided into three types by probability accumulation method.In addition,this paper also constructs a comprehensive parameter using SP,Rt and other logging curves that are sensitive to flooding information.Combining this parameter with reservoir physical properties can obtain a comprehensive index of water content,which can be used to qualitatively identify the water flooded level.On this basis of above,based on water flooding and phase infiltration experiments,the functional relationship between water content and water saturation change is established,and the quantitative interpretation standard of water-flooded layer is determined.After applying the method to explain the water-flooded layer of P-oil layer in S oilfield,the coincidence rate with the water-washing analysis conclusion of sealed coring wells is 81.8%,which is effective and can meet the needs for logging interpretation and residual oil evaluation of flooded layer watered out reservoir and evaluation of residual oil.
作者
李闯
杨清山
卢艳
马宏宇
李金奉
LI Chuang;YANG Qingshan;LU Yan;MA Hongyu;LI Jinfeng(Exploration and Development Research Institute,Daqing Oilfield Company,Daqing,Heilongjiang 163712,China)
出处
《测井技术》
CAS
CSCD
2018年第5期562-567,共6页
Well Logging Technology
基金
中国石油天然气股份有限公司重大科技专项外围油田改善开发效果及提高采收率技术研究与应用(2016E-0209)资助
关键词
测井解释
储层分类
含水率
综合参数
含水率综合指数
MDT
log interpretation
reservoir classification
water content
composite parameter
composite index of water content
MDT
