储层综合特征参数预测大牛地气田盒3段产能

Application of comprehensive characteristic parameters of reservoirs to predict the gas deliverability in the layer p_1x^3 of the Daniudi gas field

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 sands gas layers in the Daniudi gas field is characterized by low porosity,low permeability,and low abundance. This paper analyzed the sensitivity to the rocks in p1x3's layer with low porosity,low permeability and gas containing applying comprehensive characteristic parameters of well logging,and then built up a standard of classifying gas reservoirs. Compared with the absolute open flow in gas bearing layer,we built up a standard of classifying the reservoirs into high,middle,and low deliverability,and selected the ratio parameters which had most contribution to deliverability in combination with the measured open flow to construct a fitting predicting formula to calculate the absolute open flow,and finally the formula can be validated by the example. This method is very effective and convenient in identifying the level of deliverability of gas reservoir.