压裂水平井水驱油物理模拟  

Physical Modeling of Water-Oil Displacement in Hydraulic Fractured Horizontal Wells

作　　者：刘华林[1] 熊伟[1] 高树生[1] 薛惠[1] 胡志明[1] 

机构地区：[1]中国科学院渗流流体力学研究所,河北廊坊065007

出　　处：《新疆石油地质》2010年第2期171-173,共3页Xinjiang Petroleum Geology

基　　金：国家重大油气专项(2008ZX05013-002)

摘　　要：用可视化的平板模型实验模拟了哑铃形、纺锤形、等长裂缝形3种模型五点井网压裂水平井水驱油过程,拍摄了水驱油波及规律图片,记录了产油量、产水量。3种模型的水驱油过程都可分为4个阶段,每个阶段对应不同的波及区域,水驱油结束时形成2个死油区;纺锤形模型的无水采出程度最大,哑铃形模型的最小;含水采油期,纺锤形模型的含水率最小、采油速度最大,而哑铃形模型正好相反;哑铃形模型与等长裂缝形模型的含水率、采油速度都有一个相对平缓的阶段,而纺锤形模型没有;3种模型的采收率相差不大,但注入孔隙体积倍数却相差较大,其中哑铃形模型的最大,纺锤形模型的最小。从3种模型的无水期采出程度、采油速度、含水期含水上升率及注入孔隙体积倍数的比较来看,纺锤形模型的注水效果最好,哑铃形模型的注水效果最差,而等长裂缝形模型居于二者之间。The water-oil displacement process in hydraulic fractured horizontal wells （five-spot well pattern） is simulated by three models of dumbbell, nun and equal-length crack shapes, with their pictures of sweep regularity and records of oil and water production. The process can be divided into four stages, and each stage corresponds to different sweet area. Two dead oil areas are found in the end of the process. The experiment indicates that for water-free recovery, the nun model gives the highest, the dumbbell model gives the lowest; in water-bearing recovery stage, the nun model gives the lowest water cut and the highest oil recovery rate, while dumbbell model is in contrary for these values; however, the dumbbell model and equal-length model have relatively easy or stable stages in water cut and oil recovery rate, the nun mode has not; such three models are generally similar in the recovery, larger in injection pore volume, of which nun model is the biggest, dumbbell model is the smallest. According to the correlations of these models in water-free recovery, oil recovery rate and injection pore volume, water cut, the nun model has the best effect of water injection, the dumbbell model has the worst of it, while the equal-length crack model has the intermediate.

关 键 词：水平井 压裂 平板模型 五点井网 采收率 注入孔隙体积倍数 

分 类 号：TE311[石油与天然气工程—油气田开发工程]