井壁取心资料在油层水淹解释中的应用

Application of sidewall coring data in watered-out oil layer's interpretation

大庆油田已进入高含水后期开采阶段,剩余油在平面和空间上高度分散,调整挖潜的对象已从厚油层逐渐向薄差层、表外层转移。薄层以及泥质、钙质等非均质夹层对测井资料有较大影响,在多种曲线幅值信息完全相同的情况下水淹状况差别较大,给水淹层的常规测井解释带来困难。尽管密闭取心实验室评价油层动用状况精度较高,仍不能满足实际生产需求。因此,通过井壁取心、试油资料对比分析,对于落实过渡带地区油水界面深度、指导油层水淹解释具有重要意义。

Daqing oilfield has entered into the late development stage of high watercut and residual oil distributes in highly scattered way no matter in horizontal and vertical and furthermore the adjusted objects have transferred from thick oil laver to thin, poor and peripheral ones. Thin layer, muddy and calcium heterogeneous interbed and so on possess great higher influences on well logging data ： under the totally same information circumstance of amplitude values of multiple curves, the contrast of watered-out state is so sharp that can bring a certain difficult to the conventional well logging interpretation of these watered layers. Although the evaluation accuracy of oil layer developed degree is pretty higher in sealed core experiment, it cannot meet the actual production requirements. So the comparison and analyses of sidewall coring and oil test data possess very important significance for determining oil-and-water interracial depth in transitional zone and guiding the watered-out interpretation of oil layers.