特种油气藏2025，Vol.32Issue(6)：58-68,11.DOI:10.3969/j.issn.1006-6535.2025.06.007
塔里木盆地顺北地区中—下奥陶统鹰山组层序地层划分及控储效应
Sequence stratigraphic division and reservoir control of the middle-lower Ordovician Yingshan Formation in Shunbei Area,Tarim Basin
摘要
Abstract
To establish a sequence stratigraphic framework for the middle-lower Ordovician Yingshan Formation on an open-to-restricted carbonate platform in the Shunbei Area of the Tarim Basin,and to investigate how sequence stratigraphy controls favorable reservoirs and to build reservoir models,outcrop,core,well-logging and seismic data were used,third-order sequence boundaries were identified.Upon this,INPEFA(Integrated Prediction Error Filter Analysis)well logging cycle and Dmey wavelet transform were applied to Th/U ratio log curves.Combined with Fis-cher diagram methods,fourth-order sequences were produced,which enabled classification of reservoir types and characteristics,analysis of their reservoir-control effects,and determination of reservoir development patterns under multiple factors.In the study area,two third-order sequences(SQ1-SQ2)and four fourth-order sequences(YSQ1-YSQ4)were identified.Based on fracture characteristics and depositional context,sequence SQ1 contained more thin interbedded tuffaceous limestone layers and higher dolomite content than SQ2,making it more prone to bed fractu-ring and reservoir development.Within the fourth-order sequences(YSQ1-YSQ4),four bottom-top reservoir types were identified:fracture reservoirs associated with the main fault,dolomite reservoirs formed by burial or hydrother-mal processes,limestone fracture reservoirs controlled by secondary faults,and karst(dissolution-cavity)reservoirs closely linked to penecontemporaneous processes.This study provides a theoretical basis for high-frequency se-quence stratigraphy controls reservoirs and clarifies directions for predicting favorable reservoirs.关键词
顺北地区/鹰山组/自然伽马能谱测井/层序地层划分/储层发育模式Key words
the Shunbei Area/Yingshan Formation/natural gamma-ray spectrometry logging/sequence stratigraphic division/reservoir development model分类
能源科技引用本文复制引用
唐小飞,鲍典,韩长城,代金城,刘丽鹏,张博文..塔里木盆地顺北地区中—下奥陶统鹰山组层序地层划分及控储效应[J].特种油气藏,2025,32(6):58-68,11.基金项目
国家自然科学基金"塔里木盆地哈拉哈塘油田多期走滑断裂带成岩流体演化及其对超深层碳酸盐岩成储的制约"(42062010) （42062010）
中国石化科研项目"顺北断控缝洞型油气藏储集体结构表征方法研究"(P24135) （P24135）
