测井技术2026，Vol.50Issue(4)：724-733,10.DOI:10.16489/j.issn.1004-1338.2026.04.016
油基钻井液下录井参数校正方法及在风平地区应用
Calibration Method for Mud Logging Parameters Contaminated by Oil-Based Drilling Fluid and Its Application in Fengping Area
摘要
Abstract
With the advancement of oil and gas exploration into unconventional and concealed reservoirs,the widespread application of highly deviated and horizontal wells has led to the effective resolution of drilling challenges in complex formations by oil-based drilling fluids,thanks to their superior wellbore stability.However,these fluids adsorb hydrocarbon substances,causing severe distortion in logging data such as cuttings logging,gas logging,and rock pyrolysis logging.Existing single-parameter correction methods suffer from poor applicability and lack supporting fluid interpretation templates,making it impossible to rely on the traditional water-based drilling fluid evaluation system,which severely restricts the accuracy of reservoir fluid identification.To address these technical challenges,this study focuses on the Fengping region reservoir as the research area,establishing a systematic multi-parameter collaborative correction method for oil-based drilling fluid logging parameters.The three-step cleaning process optimizes cuttings treatment to eliminate oil-based contamination interference.Based on the effective carbon content model of reservoir crude oil and industry-standard fitting formulas,precise correction of the S1 parameter in rock pyrolysis is achieved without residual carbon data.Through indoor hydrocarbon component adsorption simulation experiments,the adsorption rates of hydrocarbons with different carbon numbers are quantified,leading to the development of gas logging component correction formulas.Leveraging measured data from water-based drilling fluids in the same formation,a multivariate weighted regression algorithm is employed to construct a total hydrocarbon correction model.Using stable mudstone section drilling fluid immersion data as background values,quantitative fluorescence parameters are corrected.Finally,a standardized reservoir fluid interpretation evaluation template is developed.Field applications in multiple wells of the Fengping region have confirmed that this method effectively eliminates oil-based drilling fluid interference in various logging data.The corrected logging parameter interpretation results align closely with field test results,significantly improving the accuracy of reservoir fluid identification under complex conditions.This research enhances the oil-based drilling fluid logging evaluation technical system,providing reliable technical support for precise exploration and evaluation of deep shale oil and gas and tight reservoirs.关键词
油基钻井液/岩屑/岩石热解/有效碳含量/录井参数/储层流体识别/解释评价Key words
oil-based drilling fluid/cuttings/rock pyrolysis/effective carbon content/mud logging parameter/reservoir fluid identification/interpretation and evaluation分类
天文与地球科学引用本文复制引用
段胜强,段宏臻,张连梁,刘辉,付新,李会光..油基钻井液下录井参数校正方法及在风平地区应用[J].测井技术,2026,50(4):724-733,10.基金项目
中国石油天然气股份有限公司项目"中国陆相页岩油成藏机理、分布规律与资源潜力研究"(2019E-2601) （2019E-2601）
