延长组核磁共振录井基本解释方法研究

BASIC INTERPRETATION METHOD FOR NUCLEAR MAGNETIC RENOSANCE MUD-LOGGING AT YANCHANG FORMATION

鄂尔多斯盆地中生界含油层系属于典型的"三低"特征低渗透油藏,具有储层储积条件差、非均质性强、油水关系复杂的特点,解释评价难度极大。利用核磁共振录井技术对中生界三叠系储层进行研究分析,总结出各参数与储层赋存流体性质、孔隙介质等的相互关系。通过大量的实验分析,优选出贡献度大、分离度明显、操作性强以及具有油田地质开发意义的参数。尤其是创新性地建立了一套适合本盆地的核磁共振录井解释评价体系。实践证明,该评价体系在储层综合解释评价应用效果良好,为勘探开发方案制定、油气藏精细描述等方面提供了新的思路和发挥了重要的技术。

The Mesozoic oil reservoirs at Erdos basin have typical features of low permeability,such as poor storage conditions,serious heterogeneitiy and complicated oil/water relationship,making interpretation and evaluation very difficult.A study has been conducted using the nuclear magnetic resonance mud-logging technology to analyze the Triassic reservoir,the relationship between the parameters and reservoir fluid properties and porosity media has also been concluded.Meanwhile massive experimental analysis is made,the parameters which are practical,contributing and distinguishable and significant for geologic development of oilfields are selected,and es pecially,a set of evaluation system suitable for low permeability res ervoir has been established.The application has proven that the eval uation system is effective to the comprehensive logging interpretation and evaluation,it will be a new methood for exploration development planing and fine description of oil reservoirs.