大牛地气田上古生界砂岩具有低孔、低渗、低丰度气层的特点,应用测井综合特征参数对盒3段储层的低孔、低渗及含气性进行了敏感性分析,构建了气层类型的标准;在与气层实测无阻流量对比的基础上,建立了高、中、低产能的判别标准;选择对产能预测贡献大的比值参数与实测无阻流量进行拟合,得到了无阻流量的预测公式。现场验证表明,该技术对识别储层的产能高低具有快速、简便、实用、可信的特点。 The Upper Paleozoic sandstones in Daniudi gas field have the characteristics of low porosity, low permeability and low abundance of gas reservoirs. Sensitivity analysis of the low porosity, low permeability and gas content in the reservoir of Block 3 is made by the comprehensive logging parameters , The standard of gas layer type was established. Based on the comparison with the unobstructed flow rate measured by gas layer, the discriminant criteria of high, medium and low productivity were established. The ratio parameter which contributed greatly to the prediction of productivity was fitted with the unobstructed flow rate, Got the predictive formula of unobstructed flow. Field verification shows that the technology has the characteristics of quick, simple, practical and credible for identifying the production capacity of the reservoir.