潜山凝析气藏油环判定及动态储量计算方法研究

Research on the oil rim judgment and method for calculating dynamic reserves of buried hill condensate gas reservoir

在早期评价阶段,渤海C潜山凝析气藏被认为是一个边部无油环的凝析气藏,随着开发的深入,气藏生产两年后,在对凝析油化验分析过程中,凝析油的颜色逐渐加深,地面原油密度逐渐变大,初步判断此潜山凝析气藏可能存在油环。本文通过实验法及经验统计法对渤海C潜山凝析气藏是否存在油环进行了综合分析,研究结果表明该凝析气藏存在油环,并从物质平衡原理出发,建立了带油环的凝析气藏物质平衡方程式,计算了渤海C潜山凝析气藏油环的储量,为气田下步挖掘油环的潜力提供了指导意义。

In the early evaluation stage,Bohai C buried hill condensate gas reservoir is considered as a condensate gas reservoir without oil ring at the edge.With the deepening of development,after two years of gas reservoir production,during the test and analysis of condensate,the color of condensate gradually deepens and the density of surface crude oil gradually increases.It is preliminarily judged that there may be oil ring in this buried hill condensate gas reservoir.This paper comprehensively analyzes whether there is an oil ring in the condensate gas reservoir of Bohai C buried hill by experimental method and empirical statistical method.The research results show that there is an oil ring in the condensate gas reservoir.Based on the principle of material balance,the material balance equation of condensate gas reservoir with oil ring is established,and the reserves of oil ring in Bohai C buried hill condensate gas reservoir are calculated.It provides guiding significance for tapping the potential of oil ring in gasfield in the next step.