低流度油藏考虑启动压力和压敏效应的渗流特征

SEEPAGE FEATURES OF LOW-MOBILITY OIL RESERVOIR CONSIDER- ING KICK-OFF PRESSURE AND PRESSURE-SENSITIVE EFFECT

为了真实描述低流度油藏渗流特征，在对涠西南凹陷低流度油藏启动压力和压敏效应进行研究的基础上，推导出了综合考虑启动压力和压敏效应的产能方程，并利用该方程研究了两者对低流度油藏产能的影响。结果表明：启动压力和压敏效应研究不能局限于低渗油藏，尤其不能忽略高黏·低流度油藏；两者影响的矛盾性预示着低流度油藏渗流规律研究应重视其综合作用，但是启动压力的影响较压敏效应更为强烈。

In order to describe the seepage features of low-mobility oil reservoir, on the basis of the researcnes on kick-off pressure and pressure-sensitive effect of low-mobility oil reservoir in Weixinan Sag, the productivity equation considering kick-off pressure and pressure-sensitive effect is derived. The equation is used in the researches of the effects of kick off pressure and pressure sensitivity on the productivity of low-mobility oil reservoir. The results show that the studies on kick-off pressure and pressure-sensitive effect should not be limited to low mobility oil reservoir, and the reservoir with high viscosity and low mobility should not be neglected. Contradictions of the influences of kick-off pressure and pressure-sensitive effect predict that the researches on seepage regulation of low-mobility oil reservoir should emphasize on the comprehensive effects, while the influence of kick-off pressure is stronger than that of pressure-sensitive effect.