摘要
Abstract
To address the limitations of conventional logging and well testing methods in evaluating complex critical-state fluid properties caused by multi-stage hydrocarbon charging in the Huizhou Sag,as well as the strong regional applicability constraints of cross-plots for various conventional methods,a detailed comparative analysis between FLAIR gas logging and conventional RESERVAL gas logging was carried out.On this basis,derived parameters including Ci_n,Y1,Y2,Y3 for fluid property evaluation were established.Pearson correlation analysis was adopted to screen the key parameters affecting the gas-oil ratio,which are ranked in sequence as Y1,Y2,Y3,C3_n,C1_n and C2_n.Furthermore,a qualitative identification method for fluid properties was formulated,and a quantitative prediction method of gas-oil ratio was constructed based on the Support Vector Machine(SVM).This technology can distinguish complex fluid types(condensate gas reservoirs and volatile oil reservoirs)in the Huizhou Sag.In practical application,the gas-oil ratio predicted by the qualitative identification and quantitative evaluation methods established based on FLAIR gas logging technology is highly consistent with the actual MDT pump sampling and analysis results.It indicates that this method can rapidly and accurately judge complex formation fluid properties,and provides guidance for exploration test decision-making and reserve assessment&declaration.关键词
FLAIR气测录井技术/流体性质/定性识别/定量评价/气油比预测Key words
FLAIR gas logging technology/fluid properties/qualitative identification/quantitative evaluation/gas-oil ratio prediction分类
天文与地球科学
