一种改进水驱特征曲线的建立及应用  

Establishment and application of an improved water flooding characteristic curve

作　　者：凃兴平 孙欣华 殷嘉伟 李留杰 TU Xingping;SUN Xinhua;YIN Jiawei;LI Liujie(Research Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi'an Shaanxi 710075,China)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710075

出　　处：《石油化工应用》2024年第7期52-55,共4页Petrochemical Industry Application

摘　　要：水驱特征曲线是油田开发中用来预测水驱可采储量与采出程度的重要方法之一。截至目前,国内外学者已经研究出60多种水驱特征曲线的表达式,但每种水驱特征曲线在油田实际开发应用中都存在一定的局限性。为了更好的反映油藏的含水率变化情况,在马克西莫夫-童宪章水驱特征曲线和沙卓诺夫水驱特征曲线2种典型对数水驱特征曲线基础上,提出了一种带系数n的新型水驱特征曲线,得出了含水率与采出程度的函数关系式,绘制了从S型到凸型曲线变化的关系图。通过实例证明,新建立的水驱特征曲线比单一的水驱特征曲线对油田开发的描述更加准确、可靠,不同的开发阶段用不同的水驱特征曲线拟合效果更佳,且应考虑水驱方程中n取不同值时a、b值的变化。The water flooding characteristic curve is one of the important methods used in oilfield development to predict the recoverable reserves and recoverable levels of water flooding.So far,national and foreign scholars have studied more than 60 kinds of expressions for water flooding characteristic curves,but each water flooding characteristic curve has certain limitations in the actual development and application of oilfields.In order to reflect the water change in reservoirs,based on the typical logarithmic water flooding characteristic curves of the Maximov-Tong xianzhang's water flooding characteristic curve and the Shadawn water flooding characteristic curve,a new water flooding characteristic curve with coefficient n is proposed,and the relationship between water content and recoverable level is obtained,then draw a graph of the change from S to convex curve.Through case analysis,water flooding characteristic curve is more accurate and reliable than the single water flooding characteristic curve for the description of oilfield development,fit different development stages with different water flooding characteristic curves for better results,and should consider the change of values of a and b when n takes different values in the water flooding equation.

关 键 词：可采储量 采出程度 水驱特征曲线 含水率 

分 类 号：TE328[石油与天然气工程—油气田开发工程]