致密砂岩气层测井评价方法研究

致密砂岩气属于典型的非常规天然气。针对鄂尔多斯盆地东部X区块的致密砂岩储层进行评价方法研究。该地区的致密砂岩气储层具有孔隙度非常低、渗透率极差、孔隙结构十分复杂、非均质性强等特点,加大了储层含气性的解释难度。为了能更有效的识别致密砂岩的含气性,根据压汞、核磁共振等岩芯分析资料,初步建立了孔隙度、饱和度的测井解释模型,利用常规方法、多极子阵列声波、微电阻率扫描等测井资料研究了致密砂岩气的识别方法,提高了储层测井评价的准确率。

Method Reserch For Logging Evaluation Of Tight Gas-bearing Sandstone

Tight gas sandstone is the typical of unconventional gas.The evaluation method of tight gas-bearing sandstone reservoir in Block X is studied which is in the eastern part of Erdos Basin.The tight gas sandstone reservoir in Block X has the characteristics of quite low porosity and permeability,complicated pore structure and strong heterogeneity,which increased the difficulty of reservoir evaluation.In order to identify the tight gas-bearing sandstone more effectively,on the basis of core analysis data of capillary pressure and NMR core experiments,primarily established logging evaluation model of porosity,saturation,etc.Based on conventional logging data,XMAC,STARⅡ,etc,the identification of tight gas-bearing sandstone is researched,improved the accuracy of reservoir evaluation.