将趋势线数学模型引入气测录井解释方法研究

围绕如何提高气测解释符合率这一储集层评价领域最具挑战性的热门课题，引入趋势线数学模型的概念，试图通过探讨气测值间的关系，建立一种与地层压力趋势线原理相似的解释方法，用于储集层的含油气性评价。为此采用相关性最小与最大的烃组分的比值来代替起主导作用的组分作为横坐标，分别采用区域性指标烃湿度比、烃平衡比作为纵坐标，在此基础上建立了克XX井区石炭系储集层流体性质划分图板，从而将油气水的气测特征进行有效划分。该方法用于准噶尔盆地克XX井区石炭系储集层含油性评价，气测解释符合率达85．7％，取得了较好的效果。

Study of the method for leading the mathematical model of the trend line into gas logging interpretation

In view of the most challengeable hot subject in reservoir evaluation of how to increase gas logging interpretation coincidence rate, the author introduced the concept of the mathematical model of trend line and tried to establish an interpretation method which was similar to the principle of the formation pressure trend line by discussing the relationship between gas logging values for evaluating oil-bearing properties of the reservoir. Therefore, the hydrocarbon component ratio of the maximum to the minimum correlativity to replace the main component was used as the abscissa, and the regional indexes of hydrocarbon humidity ratio W_h and hydrocarbon balance ratio B_h as the ordinate individually. On such a basis the dividing chart for carboniferous reservoir fluid properties in K XX well region was established, thus effectively dividing the gas logging characteristics for oil, gas and water. By the application results of evaluating carboniferous oil-bearing properties of the reservoir in K XX well region of Zhunger Basin, it was proven that the gas logging interpretation coincidence rate has reached 85.7% with the better effects.