摘要
低孔隙储层中孔隙流体对测井资料响应贡献较小,油气层识别是常规测井资料解释的难点,而区分油层和气层则更为困难。从分析天然气与油、水的不同物理性质出发,提炼致密储层中测井资料对含气信息的反映,再结合实际总结了该类储层中气层的含气信息特征。在参考同类低孔隙储层中含气性识别文献的基础上,摸索出利用补偿声波、补偿中子孔隙度差值识别气层的新方法,该方法具备操作性强、快捷、直观、成本低的特点,经现场应用,其识别符合率提高到100%。
Pore fluid in low-porosity reservoirs contributes to log response very little and to determine oil/gas formation becomes very hard during conventional well-logging interpretation.Therefore it is more difficult to distinguish between oil and gas formations.Gas-bearing information in tight reservoirs can be obtained by well-logging data based on different physical properties of gas,oil and water.Simultaneously,combined with real application to gasfield,some characteristics of gas-bearing information are also concluded.Based on some references,a new method to determine gas formation by porosity difference,which was tested by compensated sonic and compensated neutron well-logging,has been developed.This method is characterized by an easy and rapid operation with low cost.And its application shows that a determination coincidence has been raised by 100%.
出处
《天然气技术》
2009年第1期37-40,共4页
NATURAL GAS TECHNOLOGY
关键词
低孔隙储层
低声速
低含氢指数
孔隙度差值
长井段对比
low-porosity reservoirs,low-sonic velocity,low-hydrogen index,porosity difference,long well section correlation
