特种油气藏2025，Vol.32Issue(6)：40-49,10.DOI:10.3969/j.issn.1006-6535.2025.06.005
塔里木盆地奥陶系碳酸盐岩储层多期裂缝特征及期次厘定
Multi-stage fracture characteristics and determination of stages in Ordovician carbonate reservoirs of the Tarim Basin
摘要
Abstract
Aiming at the challenges of deep burial,complex stages and difficulty in quantitative characterization of fractures in Ordovician carbonate reservoirs in the Tarim Basin,taking typical outcrops in northwestern Tarim as re-search objects,digital outcrop characterization technology was used to systematically identify and describe fractures.Based on fracture occurrence statistics and structural trace analysis,the superposition relationships of multiple frac-ture sets were analyzed.Through carbon-oxygen isotope analysis,acoustic emission experiments,other testing meth-ods,the main fracture-forming stages and stress field evolution characteristics of outcrop fractures were determined.The study shows that fractures in the northwestern Tarim outcrop area can be divided into multiple sets based on strike:330°fracture set,270°fracture set,250°and 210° fracture sets,300°and 0° fracture sets,etc.Their forma-tion corresponds to Middle Caledonian,Late Caledonian-Early Hercynian,Late Hercynian-Indosinian,and Hima-layan,four main tectonic stages.After comparing the fracture development characteristics of the Halahatang Oilfield,it was clarified that the reservoir mainly develops three stages of tectonic fractures and the quantitative distribution law of multi-stage fractures was revealed.Compared with the fracture parameters interpreted by imaging logging,the average compliance rate reached 80%.The research conclusions confirm the effectiveness of outcrop studies in determining the stages of subsurface reservoir fractures and can provide reliable geological basis for the exploration and development of karst fracture-cavity reservoirs in the Tarim Basin.关键词
碳酸盐岩/多期裂缝/裂缝期次/构造演化/构造应力场/奥陶系/塔里木盆地Key words
carbonate rock/multi-stage fractures/fracture stages/tectonic evolution/tectonic stress field/Ordo-vician/Tarim Basin分类
能源科技引用本文复制引用
杜赫,冯建伟,宛东平,徐守余,邢会林..塔里木盆地奥陶系碳酸盐岩储层多期裂缝特征及期次厘定[J].特种油气藏,2025,32(6):40-49,10.基金项目
国家自然科学基金"基于应力-耗能耦合模型的互层型致密砂岩裂缝定量预测研究"(42072234) （42072234）
