三维定量荧光录井影响因素分析及控制措施

Analysis of influencing factors and control measures of three-dimensional quantitative fluorescence logging

三维定量荧光录井技术在石油勘探开发中得到了广泛应用,但应用于页岩油样品时,发现按常规方法操作存在分析数据误差较大的问题。为提高三维定量荧光录井数据质量,通过对原有资料的分析,找出影响分析数据及谱图准确性的因素,进而针对页岩油样品中含有杂质、样品浸泡时间、样品稀释浓度以及仪器光源变化等因素进行实验分析,通过采用统一的标准物质,建立三维定量荧光仪的校准方法,确定合适的浸泡时间,并对软件进行修改完善,确保样品稀释浓度保持在合理的范围。采取上述控制措施后,在实际井的应用过程中三维定量荧光分析数据及谱图的差错率由原来的5.02%下降至1.23%,效果显著。

Three-dimensional quantitative fluorescence logging technology has been widely used in oil exploration and development,but when applied to shale oil samples,it is found that there is a big error in analytical data when it is operated by conventional methods.In order to improve the quality of three-dimensional quantitative fluorescence logging data,the factors that affect the accuracy of the analytical data and spectrogram were found out by analyzing the original data.Furthermore,experimental analysis was made to the factors such as impurity in shale oil sample,soak time of sample,diluted concentration of sample and change of instrument light source,etc.By adopting a unified standard substance,the calibration method of three-dimensional quantitative fluorescence instrument was established,the rational soak time was determined,and the software was modified and perfected to ensure that the diluted concentration of the sample is kept in a reasonable range.After taking the above control measures,the error rate of three-dimensional quantitative fluorescence analysis data and spectrogram decreased from 5.02%to 1.23%in the real well application process,and the effect is remarkable.