用微观模型组合实验研究最低吸水层渗透率  

STUDY ON THE MINIMUM PERMEABILITY OF WATER DRAWING LAYER-BY USING MULTIMODEL EXPERIMENT

作　　者：李劲峰[1] 曲志浩[1] 孔令荣[1] 

机构地区：[1]西北大学油藏地质及油层物理研究所,陕西西安710069

出　　处：《石油学报》2000年第1期54-59,共6页Acta Petrolei Sinica

摘　　要：利用不同微观模型之间的物性差异及其直观性的特点，设计了微观模型组合实验，模拟油层注水，以研究储层非均质对油水运动的影响。通过模型组合实验，可以确定一个合注层段内不吸水小层的渗透率下限，即最低吸水层渗透率Ｋｗｍｉｎ，研究Ｋｗｍｉｎ与合注层段中最大渗透率值Ｋｍａｘ及注水压力梯度之关系，从而可以进一步根据油层的实际注水压力梯度及用该井取心、测井资料确定的渗透率剖面，求取一个合注层段、一口井、一个油藏的最低吸水层渗透率。最低吸水层渗透率值可以用来进行油藏注水开发效果分析，研究油层剩余油分布。应用Ｋｗｍｉｎ对鄯善油田三间房组油层部分注水井合注层段的吸水状况做了初步分析，获得了比较满意的结果。可以预料对最低吸水层渗透率的深入研究，将获得该参数更广泛的用途。Multimodel experiment simulating reservoir water flooding and made up of several different models in physical property is recommended to study the effect of het erogeneity of a reservoir in flooding process. A new parameter-the minimum perm eability of water drawing layer, Kwmin of multilayerinje cted interval was measured by multimodel experiment and the relations among Kwmin and maximum permeability of multilayerinjected interva l and water flooding pressure gradient were determined by which the K wmin of other wells of the reservoir can be estimated. It is found t hat the Kwmin is very helpful to predict the waterflood ing effect of a reservoir and the distribution of residual oil. The satisfactory results from application of Kwmin presented in this pa per were obtained in Sanjianfang reservoirs, Shanshan Oilfield. It is obviously that further study will lead to extensive application of this new parameter.

关 键 词：最低吸水层 渗透率 微观模型 模型组合 油田开发 

分 类 号：TE312[石油与天然气工程—油气田开发工程]