HQ低渗透油藏油井流入动态研究

The inflow relationship research of HQ low permeability oil reservoir

HQ长6油藏作为典型的低渗透油藏,常规方法无法较为准确的研究其流入动态特征。基于HQ长6油藏储层实际渗流特征,通过常规油藏油井流入动态曲线探讨,分析了常规油藏油井流入动态曲线存在的不足及原因,考虑溶解气油比以及储层应力敏感的影响,修正了流入动态方程,得到低渗透储层油藏流入动态曲线方程。实例分析证明,低渗透油藏油井流入动态特征描述需考虑溶解气油比随压力的变化,同时利用油井数据验证了公式的准确性。

The HQ Chang 6 oil reservoir is a typical low permeability reservoir,the common method can not be valid anymore when studying the inflow relationship.Based on the percolation characteristics of HQ Chang 6 oil reservoir,the author explored the convention oil reservoir inflow relationship curve,analyzed the defect and shortage of convention oil reservoir inflow relationship curve,considered the effect of solution gas-oil ratio and stress sensitivity,revised the IPR equations,eventually obtained the IPR equations of low permeability oil reservoir.Case study shows that the description of inflow relationship in low permeability oil reservoir should consider the relationship between solution gas-oil ratio with pressure,meanwhile the new equation can be very accurate in calculating the inflow relationship in low permeability oil reservoir.