运用含水上升规律优选水驱曲线新方法探索  

A Study on New Method for Optimizing Water Drive Curve Using Law of Water Cut Rising

作　　者：刘朋 王云献 Liu Peng;Wang Yunxian(Tianjin Branch of China National Offshore Oil(China)Co.,Ltd.,Tianjin 300459)

机构地区：[1]中海石油(中国)有限公司天津分公司,天津300459

出　　处：《中外能源》2022年第9期43-48,共6页Sino-Global Energy

摘　　要：水驱曲线法是标定水驱油田可采储量和评价水驱油田开发效果的重要方法,但在应用过程中,不同水驱曲线预测的可采储量存在较大差别,而且行业标准中推荐的以黏度作为水驱曲线选取条件存在不适用性。因此,在前人研究的基础上,结合渤海中部海域的大型河流相稠油油田BHQ油田的地质油藏特征和开发规律,对水驱曲线进行优选应用。通过系统研究甲、乙、丙、丁型4种水驱曲线法理论含水上升规律特征,即含水率与采出程度、含水上升率与采出程度的关系曲线形状特征,以水驱曲线的特征值或特征形态为图版,对照油田实际含水上升规律曲线,根据拟合相关系数和趋势形态,优选出丙型水驱曲线法作为油田可采储量计算方法。同时把丙型水驱曲线法计算结果与递减法、数值模拟法等其他方法进行对比,计算结果 较为合理,标定采收率与数值模拟法相差在1个百分点以内,符合实际生产情况。运用含水上升规律优选水驱曲线新方法在渤海其他油田进行了推广应用,计算结果较为可靠。表明以含水上升规律特征曲线作为水驱曲线的选取方法,代替以黏度作为水驱曲线的选取条件,更加合理、可靠。Water drive curve is an important method for calibrating recoverable reserves of water flooding oilfields and evaluating the development effect of water flooding oilfields.However,the recoverable reserves predicted by different water flooding curves are quite different.There is inapplicability of using viscosity as the selection condition of water drive curve recommended in industry standard.Therefore,the water drive curve is optimized for the application based on the previous researches combined with the geological characteristics and development law of the large fluvial heavy oil reservoir in BHQ Oilfield in the central Bohai Sea.The characteristics of the theoretical water-cut rising law of four types of water drive curve A,B,C and D are systematically studied including the curve shape characteristics of the relationship between water cut and re-covery degree,and water cut rising rate and recovery degree.According to the fitting correlation coefficient and trend,the C-type water drive curve is selected as calculation method of oilfield recoverable reserves tak-ing characteristics value or their shapes as charts compared with actual water cut rising curve of the oilfield.While the calculation results of the C-type water drive curve are compared with that of decline method,numerical simulation and other methods.The calculation results of the C-type water drive curve is more reason-able,and the difference of calibrated recovery is less than 1% compared with that of numerical simulation,which is in line with the actual situation of oilfield production.The new method of optimizing the water drive curve using the water cut rising law has been popularized and applied in other oilfields of the Bohai Sea and the calculation results are relatively reliable.It could be drawn that it is more reasonable and reliable to use the characteristic curve of water cut rising law as the selected method of the water drive curve instead of the viscosity as the selection condition of the water drive curve.

关 键 词：水驱曲线 含水率 含水上升率 采出程度 可采储量 

分 类 号：TE53[石油与天然气工程—油气田开发工程]