摘要
鉴于目前累计存水率和累计水驱指数与含水率关系曲线误用较为严重的现象,以丙型水驱特征曲线为例,推导了累计存水率和累计水驱指数与含水率的理论关系曲线,结合西部某低渗透油藏的实际开发数据,对比了在累计注采比变化较大,水驱特征曲线存在两个直线段的情况下,误用预测值与正确预测值绝对误差和相对误差随含水率的变化规律。结果表明,误用将导致水驱特征曲线与累计存水率和累计水驱指数的联解法失效。
With respect to serious misuse of the curves between cumulative water storage rate, water drive index and water cut in application, the derived theoretical relationship of such curves is presented by taking Type-C water drive curve as an example. Combined with actual development data from a low permeability reservoir in west China, changing rules of absolute and relative errors between misuse and real forecasting results with water cut are compared, when change of the accumulative injection-production ratio is big and water drive charac- teristic curve appears two straight segment. The results show that the misuse will result in that simultaneous solution between waterdrive characteristic curve and cumolative water storage rate, water drive index is false.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2012年第5期627-628,共2页
Xinjiang Petroleum Geology
关键词
累计存水率
累计水驱指数
水驱特征曲线
联解法
误差
cumulative water storage rate
accumulated water drive index
water drive characteristic curve
simultaneous solution
error
