古地理学报2026，Vol.28Issue(2)：800-813,14.DOI:10.7605/gdlxb.2026.085
基于组合赋权法与云模型的致密砂岩储集层有利区评价方法研究:以松辽盆地南部乾深区块青三段x小层为例
A methodology for favorable area evaluation of tight sandstone reservoirs integrating combined weighting and cloud model approaches:a case study of X subunit of the Member 3 of Qingshankou Formation,Qianshen Block,southern Songliao Basin
摘要
Abstract
To reduce the subjectivity in indicator weighting and the fuzziness of grading criteria in favorable area evaluation of tight sandstone reservoirs,we develop an integrated method that couples combined weighting with a normal cloud model,and apply it to the X subunit of the Member 3 of the Qingshankou Formation(Q3)in the Qianshen Block,southern Songliao Basin.First,subjective weights are derived from expert judgment using the Analytic Hierarchy Process(AHP).Objective weights are then obtained from the dataset using the CRITIC method.The two sets of weights are finally integrated to produce combined weights,improving both geological rationality and data-driven objectivity.Meanwhile,a normal cloud model is introduced to characterize uncertainty during grade assignment.Standard cloud parameters-expectation(Ex),entropy(En),and hyper-entropy(H,)—are determined from the score intervals of evaluation grades under constraints of a boundary membership threshold,enabling a flexible mapping between evaluation grades and measured data.Results show that sedimentary facies belt,oil-bearing property,and effective thickness are the dominant controls on favorable areas,with combined weights of 0.253,0.182,and 0.124,respectively.Evaluation of 20 wells identifies 12 wells for ClassⅠ,five wells for Class Ⅱ,and three wells for Class Ⅲ wells;the outcomes show 95％agreement with previous interpretations,with a Cohen's kappa coefficient(κ)of 0.91.The method therefore provides a practical and reliable tool for favorable area evaluation of tight sandstone reservoirs.关键词
有利区评价/AHP-CRITIC组合赋权法/云模型/松辽盆地Key words
favorable area evaluation/AHP-CRITIC combined weighting method/cloud model/Songliao Basin分类
天文与地球科学引用本文复制引用
王腾宇,张淘,鲍志东,李忠诚,韩昊天,姜振昌,李磊,夏昌盛,欧长健,刘维则..基于组合赋权法与云模型的致密砂岩储集层有利区评价方法研究:以松辽盆地南部乾深区块青三段x小层为例[J].古地理学报,2026,28(2):800-813,14.基金项目
国家科技重大专项(编号:2024ZD1003604)、国家重点研发计划项目(编号:2017YFC0603104,2018YFC0604304)和中国石油天然气股份有限公司吉林油田分公司勘探开发研究院项目(编号:JLYT-YJY-2024-FW-13)联合资助.[Co-funded by the National Science and Technology Major Project for Deep Underground(No.2024ZD1003604)and the National Key Research and Development Program of China(Nos.2017YFC0603104,2018YFC0604304)and Project of the Exploration and Development Research Institute of Jilin Oilfield,PetroChina(No.JLYT-YJY-2024-FW-13)] （编号:2024ZD1003604）
