摘要
国内水平井物理模拟中,有关底水油藏储层非均质性对水平井的出水规律影响的研究较少。利用底水油藏水平井开采物理模型,研究了岩心水平方向非均质性对含水率动态分布及采收率的影响。研究结果表明,水平井跟端位于高渗部位时,水平方向渗透率级差越大,含水上升越快;水平井跟端位于低渗部位时,水平方向渗透率级差越大,含水率上升至100%的时间越缓,底水驱采收率越高;岩心底水驱至含水率100%后注入冻胶堵剂,堵水效果较好,含水率明显降低,可提高采收率。实验结果对研究水平井出水规律、预测水锥位置、堵水工艺选择和评价提供了较好的物理模拟参考。
In China, physical simulation experiments of the impact of bottom water oil reservoir heterogeneity on the law of horizontal wells water breakthrough are seldom conducted. A modern physical model of horizontal well exploitation of bottom water oil reservoir is developed to study the impact of the core horizontal heterogeneity on the dynamic distribution of water cut and recovery. The results show that the heel of horizontal wells is located in hypertonic place, the bigger the differential distribution of penetration rate, water cut increases more quickly. Horizontal well＇s heel is located at low permeability place in the larger penetration rate cores, the water cut increases to 100% more slowly and the higher recovery ratio at bottom water flooding. After bottom water flooding rock to water cut 100%, injecting gel blocking agent will lead to preferable water shutoff, significant decline of water cut and higher recovery. Experimental results supply a better physical simulation reference to studying the law of horizontal wells water breakthrough, forecasting the location of water coning, and evaluating water shut off process.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
2009年第4期63-66,共4页
Oil Drilling & Production Technology
基金
国家973重大基础前期研究专项"CO2驱替过程中多相多组分非线性渗流机理和规律"(编号:2006CB705805)
关键词
水平井
底水油藏
物理模型
非均质性
渗透率
含水率
horizontal well
bottom water oil reservoir
physical model
aeolotropism
permeability
water cut
