砾岩油藏弱凝胶调驱的选井时机界限研究——以克拉玛依油田七中区克上组油藏为例

Limits study of injection tuning for weak gel profile control in conglomerate reservoir-taking Keshang formation oil reservoir in Qizhong area of Kel-amayi oilfield as an example.

针对克拉玛依油田七中区克上组的砾岩油藏特点,应用物理模拟实验和数值模拟技术,分析了弱凝胶调驱的注入时机界限。结果表明,为了达到最佳的增油效果,应在含水率70％以前实施调驱,在含水率70％时比含水率98％时实施调驱可节约注入水27.7％。该研究结果为砾岩油藏弱凝胶调驱的矿场选井提供了依据。

The limits of injection timing for weak gel profile control are studied by physical simulation experiment and numerical simulation technology aiming at the features of the conglomerate reservoir in Keshang formation ofQizhong area in Kelamayi oilfield. Results show that in order to achieve the maximum recovery, the profile control technique should be applied when the reservoir water cut is less than 70% , and 27. 7% water injection rate could be saved than that of 98% water cut. The achievements could provide a scientific base for field well selection of weak gel profile control in the conglomerate oil reservoir.