用密闭取心实验资料进行油藏水淹状况定量研究

Quantitative study on reservoir watered out degree by using sealed coring data

文昌A油田主力油组ZJ2Ⅰ已进入中高含水期开发阶段,由于储层内部钙泥隔夹层发育、纵向非均质性强,且海上油田取资料少的特点,使得油藏在该阶段的真实水淹状况、剩余油分布较难有直接的认识。利用密闭取心的压汞和饱和度分析两项化验资料得到的储层纵向采出指数,并结合油田开发现状可对油藏纵向水淹状况做定量评价,并反映水淹程度的影响因素,分析结果表明剩余油主要分布在油藏高部位,水淹程度随深度的增加而变强,物性差及钙层发育程度强的储层,水淹稍弱。

The main reservoir Z J2 I of Wenchang A oilfield has entered into medium-high water cut stage.h is difficult to know the true reservoir watered out degree and distribution of remaining oil by rule and line because of the severe heterogeneity and short databank.Recov- ery index is got by using sealed coring data,and the influence factors were analyzed by re- covery index and status quo of oil exploitation.The results showed that remaining oil mainly distributes at the top of the reservoir.As the buried depth is increasing, the watered out de- gree is becoming more and more serious. And it is lighter in bad layers with more calcareous interlayers.