测井技术2026，Vol.50Issue(2)：252-261,315,11.DOI:10.16489/j.issn.1004-1338.2026.02.005
电缆地层测试泵抽关键参数预测方法研究
Research on Prediction Methods for Key Pumping Parameters in Wireline Formation Testing
摘要
Abstract
In the operation of sample extraction by cable formation testing pump,key parameters such as the breakthrough time of oil and gas,the stable pumping time and the purity of the sample directly affect the sampling decision.At present,the acquisition of these parameters mainly relies on the subjective experience of the operators,which easily leads to poor sampling timing and makes it difficult to balance sample quality and operation efficiency.Based on the pump sampling data of 158 wells in the western South China Sea,this paper uses the Pearson correlation coefficient method to determine the sensitive factors of oil and gas breakthrough time and pump stable time.On this basis,combined with the weight coefficients of each sensitive factor determined by the random forest algorithm,a multi-parameter fusion pump factor expression is constructed,and then a prediction model for oil and gas breakthrough time,pump stable time,and sample purity suitable for different instruments is established.The research results show that:①Porosity,mobility,pump speed,and drilling fluid specific gravity/formation pressure coefficient are the sensitive factors affecting pump sampling.Porosity,mobility,and pump speed are negatively correlated with oil and gas breakthrough time and pump stable time,while drilling fluid specific gravity/formation pressure coefficient is positively correlated with oil and gas breakthrough time and pump stable time.However,the determination coefficients of each single factor are relatively low,and the fitting effect is limited.②The determination coefficients of the multi-parameter fusion pump factor with oil and gas breakthrough time and pump stable time are all greater than 0.75,and the fitting degree is much better than that of a single sensitive factor.③Through on-site application verification at 16 pump sampling points of 12 wells in the western South China Sea,the errors of the oil and gas breakthrough time and pump stable time predicted by the prediction model based on the pump factor and the actual values are all less than or equal to 10 minutes,and the error of the predicted sample purity and the experimental analysis results is less than or equal to 10%.The conclusion is that the prediction model proposed in this paper can meet the rapid decision-making needs of on-site operations and solve the problem of the lack of quantitative guidance in pump sampling operations to a certain extent.关键词
电缆地层测试/取样决策/油气突破时间/泵抽稳定时间/样品纯度/泵抽因子/预测模型/定量指导Key words
wireline formation testing/sampling decision/hydrocarbon breakthrough time/pump-out stabilization time/sample purity/pumping factor/prediction model/quantitative guidance分类
天文与地球科学引用本文复制引用
杨福林,陈鸣,岳铖,梁云祥,张文龙,余绵涛,黎思成..电缆地层测试泵抽关键参数预测方法研究[J].测井技术,2026,50(2):252-261,315,11.基金项目
国家自然科学基金项目"基于成像测井的页岩气储层可压裂性评价方法研究"(41402118) （41402118）
中海石油(中国)有限公司重大专项项目"南海大中型天然气田形成条件、勘探潜力与突破方向"(CCL2021SKPS0124) （中国）
