松辽盆地营城组三段火山岩储层的岩石物理特性
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摘要
本文利用松辽盆地SS2-1井区11口井的测井解释成果以及岩心测试和录井资料,对营城组三段火山岩储层的岩石物理特性进行了较为详细的研究。结果表明:利用地震反射特性的差异性可以识别火山岩岩体,但是要区分不同的火山岩岩性具有很大的困难和不确定性;火山岩储层的纵波阻抗和密度与孔隙度具有良好的统计回归关系,利用地震数据预测孔隙度是切实可行的,但是预测渗透率比较困难;气层、水层、干层的弹性特性具有明显差异,合理利用地震资料区分气层、水层与干层是可行的,但是准确估算含气饱和度十分困难。
Volcanic oil and gas reservoir prediction is one of the hotspots of the seismic reservoir prediction research.It is the key and foundation to research the petrophysical properties of volcanic reservoir for using seismic reservoir prediction successfully.Based on well logging interpretation results and core experimental data and logging data from eleven wells in the block of SS2-1 well in Songliao basin,it is studied in detail for seismic properties of volcanic reservoir in the third member of Yingcheng Formation.The results show that volcanic rock body can be recognized by using the difference of seismic reflection characteristics,but it is very difficult and uncertain to distinguish different volcanic rock.Because compressional wave impedance and density have good statistical regression relationship with porosity for the volcanic reservoirs,it is feasible to predict porosity using seismic data,but it is difficult to predict permeability.The elastic properties of gas,water and dry reservoir have marked differences,so it is feasible to distinguish the gas or water reservoir and the dry layer,but to estimate accurately gas saturation is very difficult.
引文
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