石油勘探与开发2025，Vol.52Issue(2)：320-333,14.DOI:10.11698/PED.20240410
油气田地层水分析数据的可信度评价方法与影响因素分析
Data credibility evaluation method for formation water in oil and gas fields and its influencing factors
摘要
Abstract
The formation water sample in oil and gas fields is highly susceptible to being polluted,making the properties of formation water not be reflected truly.This paper discusses the identification methods and data credibility evaluation method for formation water in oil and gas fields of petroliferous basins within China.It is indicated that formation water is identified by some basic methods based on single factor such as physical properties,hydrochemical composition,water type and characteristic coefficient.On this basis,a comprehensive data credibility evaluation method is proposed,which is mainly realized by analyzing the correlation between sodium chloride coefficient and desulfurization coefficient and evaluating the geological setting.The basic identifying methods for formation water enable the preliminary identification of hydrochemical data and the preliminary screening of data on site.The proposed comprehensive method realizes the evaluation by classifying the CaCl2-type water into types A-Ⅰ to A-Ⅵ and the NaHCO3-type water into types B-Ⅰ to B-Ⅳ,so that researchers can make in-depth evaluation on the credibility of hydrochemical data and analysis of influencing factors.When the basic methods are used to identify the formation water,the formation water containing anions such as CO32-,OH-and NO3-,or the formation water with the sodium chloride coefficient and desulphurization coefficient not matching the geological setting,are all invaded with surface water or polluted by working fluid.When the comprehensive method is used,the data credibility of A-Ⅰ,A-Ⅱ,B-Ⅰ and B-Ⅱ formation water can be evaluated effectively and accurately only if the geological setting analysis in respect of the factors such as formation environment,sampling conditions,condensate water,acid fluid,leaching of ancient weathering crust,and ancient atmospheric fresh water,is combined,although such formation water is believed with high credibility.关键词
油气田水文地质/地层水/水化学数据/可信度评价方法/水化学特征指标/影响因素Key words
oil and gas field hydrogeology/formation water/hydrochemical data/data credibility evaluation method/hydrochemical characteristic indicator/influencing factor分类
石油、天然气工程引用本文复制引用
李伟,谢武仁,武赛军,帅燕华,马行陟..油气田地层水分析数据的可信度评价方法与影响因素分析[J].石油勘探与开发,2025,52(2):320-333,14.基金项目
中国石油天然气股份有限公司重大科技攻关项目"叠合盆地中下组合叠加地质构造与成因机制研究"(2023ZZ0202) （2023ZZ0202）
