气测综合曲线分析法在南海琼东南盆地的应用

Analysis method of integrated gas logging curves in Qiong Southeast Basin of South Sea.

气测录井作为一种直接测量地层天然气含量和组成的地球化学测量方法,是油气勘探中发现油气的重要手段。鉴于传统气测数据分析方法基本不能在深度域上进行多点对比分析,对气测信息使用程度低,为从更深层次挖掘气测数据信息、放大气测异常信号,通过对经典的烃组分三角图板进行数学分析,获得三角形大小、M点在价值区坐标的3条连续曲线,并对皮克斯勒图板进行变换获得C1/C2、C1/C3、C1/C43条曲线,结合3H比值法与气体比率法,形成了一套气测综合曲线分析方法。通过琼东南盆地内已钻气层数据统计分析对比,得到了适合该盆地的气测综合曲线解释模型,在实际钻井应用中解释结果与测井解释、测试产能结论符合率高。

Gas logging,ageochemical method with direct measurement of gas content and composition,is an important means in oil and gas exploration.As the analysis method of traditional gas logging data is hardly used in multi-point comparison and analysis in the depth domain and the use degree of gas logging information is low,in order to study gas logging data from a deeper level and amplify gas logging abnormal signals,the mathematical analyses were made to the classical triangle method of hydrocarbon component,3 continuous curves of triangle perimeter,M coordinates in value area were obtained,3curves of C1/C2,C1/C3,C1/C4are accessed by transforming Pixler Chart.Combined with 3H ratio method and gas ratios method,a set of integrated curve analysis methods for gas logging are formed.By analyzing and comparing the statistical data from the drilled gas zones of Qiong Southeast Basin,the interpretation model of the integrated gas logging curves is obtained,which is fit for the basin.The application of the model showed the coincidence of interpretation of results with well logging interpretation and deliverability test.