石油勘探与开发2026，Vol.53Issue(4)：790-801,12.DOI:10.11698/PED.20250685
板内小位移走滑断层构造特征定量表征方法
Quantitative characterization of tectonic characteristics of intraplate small-displacement strike-slip faults:A case study of the FI17 strike-slip fault zone in the Fuman Oilfield,Tarim Basin,NW China
摘要
Abstract
Intraplate small-displacement strike-slip faults cannot be accurately identified and quantitatively analyzed by conventional techniques.To clarify the tectonic characteristics and deformation process of intraplate small-displacement strike-slip faults,structural physical simulation experiments were designed based on the geological conditions of the study area.Taking the Fuman Oilfield in the northern Tarim Basin as an example,laser scanning was adopted to elaborately and quantitatively analyze the deformation features and differences of left-lateral strike-slip fault at each evolutionary stage.This study indicates that the deformation of the FI17 fault zone in the Fuman Oilfield evolves in four stages:diffuse deformation,R-shear fracture,branched fault interconnection,and through-going principal displacement zone(PDZ)connection.During the evolution of the strike-slip fault zone,en echelon anticlines serve as a diagnostic marker for R-shear fracture,and their uplift amplitude represents a vital parameter to classify evolutionary stages.A"Net Deformation Magnitude"method is proposed,which can effectively remove post-tectonic stratigraphic deformations irrelevant to strike-slip-related folds and extract fold geometries and uplift amplitudes solely generated by strike-slip faulting.This method further enables quantitative characterization of along-strike heterogeneities in deformation intensity and connectivity of strike-slip fault zones,thereby realizing integrated seismic-geological interpretation.A case study of the Fuman Oilfield demonstrates that the FI17 fault zone is currently in the branched fault interconnection stage,characterized by alternating through-going and disconnected segments along its strike.The findings establish a geological model for the refined interpretation of intraplate small-displacement strike-slip faults.Furthermore,the newly recognized fault-karst traps associated with R-shear fractures are expected to become promising new targets for hydrocarbon exploration.关键词
塔里木盆地/富满油田/奥陶系/走滑断层/R破裂/构造物理模拟实验/净变形量/构造演化Key words
Tarim Basin/Fuman Oilfield/Ordovician/strike-slip fault/R-shear fracture/structural physical simulation/net deformation magnitude/structural evolution分类
能源科技引用本文复制引用
付晓飞,冯昌,张银涛,吴海,罗静爽,谢昭涵,王海学,冯军,贾文昊..板内小位移走滑断层构造特征定量表征方法[J].石油勘探与开发,2026,53(4):790-801,12.基金项目
国家自然科学基金青年基金项目"基于模拟实验的走滑断裂雁列式分段生长连接机制及定量表征研究"(42502145) （42502145）
黑龙江省自然科学基金项目"克拉通盆地内小位移走滑断裂生长过程主控因素物理模拟及量化表征"(LH2024D008) （LH2024D008）
中国石油勘探开发研究院项目"叠合盆地中下组合油气成藏富集机理与保持机制研究"(2023ZZ0206) （2023ZZ0206）
