聚驱后油层优势渗流通道参数计算方法及其应用  

Calculation method and its application of reservoir dominant flow path parameters after polymer flooding

作　　者：刘国超[1] 曹瑞波[1] 闫伟[1] 刘海波[1] 梁国良[1] 樊宇[1] LIU Guochao;CAO Ruibo;YAN Wei;LIU Haibo;LIANG Guoliang;FAN Yu(Exploration and Development Research Institute of PetroChina Daqing Oilfield Co Ltd,Daqing 163712,China)

机构地区：[1]中国石油大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712

出　　处：《大庆石油地质与开发》2023年第5期90-98,共9页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项“大庆长垣特高含水油田提高采收率示范工程”(2016ZX05054)。

摘　　要：聚驱后油层优势渗流通道普遍发育,针对定量获取优势渗流通道储层参数难度大的问题,利用示踪剂监测注采井间流体实际渗流速度,确定聚驱后优势渗流通道内流体符合高速非达西渗流规律,通过高速非达西渗流公式变形推导及取心井数据回归统计分析等方法,建立了一套利用油田开发常规动、静态资料定量计算聚驱后优势渗流通道孔隙半径、渗透率及孔隙体积的方法。利用该方法计算大庆油田萨北开发区A区块聚驱后优势渗流通道储层物性参数,平均孔隙半径为11.54μm,比取心井实测值高0.07μm,相对误差仅为0.6%;平均渗透率为1.398μm^(2),比取心井实测值高0.034μm^(2),相对误仅差为2.5%;单井平均发育优势渗流通道体积3.66×10^(4) m^(3)。研究成果可以为聚合物驱后油藏驱油体系配方优化及注采方案个性化设计提供理论依据。Much developed dominant flow paths after polymer flooding cause difficulty of quantitatively obtaining reservoir parameters of dominant flow paths.Tracer monitored actual fluid flow velocity between injector and produc-er determines the fluid in dominant flow paths after polymer flooding corresponding to high-velocity non-Darcy flow law.Through deformation derivation of high-velocity non-Darcy flow formula and regression statistical analysis of coring well data,a set of method is established to quantitatively calculate pore radius,permeability and pore vol-ume of dominant flow paths after polymer flooding by using conventional dynamic and static data of oilfield develop-ment.The method is used to calculate reservoir property parameters of dominant flow paths after polymer flooding in Block A of Sabei development area in Daqing Oilfield.Average pore radius is 11.54μm,0.07μm higher than cor-ing-well measured value,with relative error of only 0.6%,and average permeability is 1.398μm2,0.034μm^(2) high-er than coring-well measured value with relative error of only 2.5%.Dominant flow paths developed in single well have average volume of 3.66×10^(4) m^(3).This calculation method provides theoretical basis for optimization of displace-ment system formula and individualized design of injection-production scheme after polymer flooding.

关 键 词：聚驱后油层 优势渗流通道 孔隙半径 渗透率 优势通道体积 

分 类 号：TE341[石油与天然气工程—油气田开发工程]