摘要
低黏低渗水驱油田含水变化规律一般符合凹形含水变化规律,但由于万吉业驱替系列中的凹形含水变化规律无水驱特征曲线对应,给现场分析工作带来困难。为此,在一种新的出口端含水饱和度与平均含水饱和度关系式的基础上,利用Welge方程,导出了凹型水驱特征曲线及其含水率变化关系式。该含水率变化关系式可替换万吉业驱替系列中的凹型含水率曲线,且具有对应的水驱特征曲线。文后,利用丘陵油田三间房组单井及油藏生产数据对新的含水变化规律进行了适用性分析和应用,效果很好,值得其他低黏低渗油田参考与借鉴。
The law of water cut change in low viscosity and low permeability water-flooding oilfield generally conforms to the law of concave water cut change,but because the law of concave water cut change in Wanjiye displacement series does not correspond to the water-flooding characteristic curve,it brings difficulties to field analysis. Therefore,on the basis of a new relationship between water saturation at outlet and average water saturation,a concave water drive characteristic curve and its water content change formula are derived by Welge equation.The formula can replace concave water cut curve in Wanjiye displacement series and has corresponding water-flooding characteristic curve. Later,the applicability of the new water cut change law is verified by using the production data of single well and reservoir of Sanjianfang formation in Qiuling oilfield,and the effect is very good,which is worthy of reference and reference for other low viscosity and low permeability oilfields.
作者
李瑞升
李冬艳
高文君
LI Rui-sheng;LI Dong-yan;GAO Wen-jun(First oil production plant,Daqing Oilfield Co Ltd.,PetroChina,Daqing,Heilongjiang 16300,China)
出处
《新疆石油天然气》
CAS
2019年第4期52-55,I0004,共5页
Xinjiang Oil & Gas
关键词
凹型含水率变化规律
水驱特征曲线
渗流特征
理论
应用
Variation law of concave water cut
Water-flooding characteristic curve
Seepage characteristics
Theory
application
