石油地球物理勘探2026，Vol.61Issue(2)：426-437,12.DOI:10.13810/j.cnki.issn.1000-7210.20240501
盆1井西凹陷东环带三工河组层序地层格架及沉积特征
Sequence stratigraphic framework and sedimentary characteristics of Sangonghe Formation in the eastern ring of West Sag of Well Pen-1
摘要
Abstract
Located in the central Junggar Basin,the eastern ring of the West Sag of Well Pen-1 is a significant tar-get for oil and gas exploration in China.However,controversies persist in terms of the sequence stratigraphic framework division of the Lower Jurassic Sangonghe Formation.Based on logging and core data,this paper adopts analytic methods including maximum entropy spectral analysis,prediction error filter analysis(PEFA),integrated prediction error filter analysis(INPEFA),cosine of instantaneous phase,and wavelet time-frequency analysis to process lithology-sensitive logging curves.As a result,curves such as the frequency trend,cosine of instantaneous phase,and wavelet coefficients at different scales as well as time-frequency chromatograms are ob-tained.Sequence boundaries of different orders are identified by analyzing trend inflection points of varying am-plitudes,oscillation characteristics of the obtained curves,and energy variations in the time-frequency chromato-grams.Single-well stratigraphic division is conducted on 53 drilled wells penetrating the Sangonghe Formation in the study area,and 28 of them are selected for cross-well sequence framework correlation analysis.Addition-ally,the sequence stratigraphic framework and sedimentary distribution characteristics of the second member of Sangonghe Formation(J1s2)and the third member of Sangonghe Formation(J1s3)are studied.The research re-sults indicate that J1s2 and J1s3 in the study area collectively constitute a third-order sequence,internally de-veloping three system tracts of the lowstand system tract(LST),transgressive system tract(TST),and high-stand system tract(HST).Furthermore,J1s2 can be divided into four fourth-order sequences.The depocenter of the study area exhibits migratory patterns,primarily distributed in the northwestern and northeastern parts,with the most significant depocenters located near the Z11 and QS4 wells.Finally,a high-precision sequence strati-graphic correlation framework for J1s2 and J1s3 is established,various sequences and sedimentary boundaries are identified,and their spatial sedimentary characteristics are clarified,thus laying a foundation for the detailed oil and gas exploration in the study area.关键词
盆1井西凹陷/三工河组/层序分析/层序地层格架/沉积特征Key words
West Sag of Well Pen-1/Sangonghe Formation/sequence analysis/sequence stratigraphic framework/sedimentary characteristic分类
天文与地球科学引用本文复制引用
殷文,周银风,许涛..盆1井西凹陷东环带三工河组层序地层格架及沉积特征[J].石油地球物理勘探,2026,61(2):426-437,12.基金项目
本项研究受新疆维吾尔自治区重点研发计划项目"超高温高压环境下复杂油气藏地球物理关键技术研发"(2024B01016)资助. （2024B01016）
