海洋地质前沿2026，Vol.42Issue(4)：75-87,13.DOI:10.16028/j.1009-2722.2025.090
深层河流相储层描述与甜点预测技术及其在N气田的应用
Deep fluvial facies reservoir characterization,sweet spot prediction,and its application in N gas field
摘要
Abstract
Currently,the scarcity of offshore drilling and rapid lateral variations in reservoirs results in lower characterization accuracy,adversely impacting recoverable reserve calculations.As exploration and development continue to break through depth limitations,refined reservoir characterization and sweet spot prediction become critical for deep hydrocarbon development.Local and regional seismic and geological data were analyzed by ap-plying seismic sedimentology,from which horizontal sedimentary facies distribution and vertical evolution pat-terns in the study area were clarified.In addition,channel episode division and connectivity analysis were conduc-ted based on reservoir geological structure,and sweet spot was predicted under the guidance of geological models of sweet spot development by characterizing physical properties of sweet spot indicators.Resuklts show that the studuy area featured fluvial-dominated deposits,and units H6&H10(meandering river),H7(straight river),and H12(braided river)were specified in sedimentology.Units H6,H7,and H10 are structural-lithologic gas reser-voirs exhibiting local discontinuity due to channel stacking and Unit H12 is a structural gas reservoir.Zones be-low Units H7 host sweet spot,for which a development model of"coupling paleo-structures,intense fractures,and main channels"was established for the northern study area.Therefore,integrating seismic-geological tech-nique could enhance reservoir and sweet spot description accuracy,by which recoverable reserve assessment and development planning has been well guided for the N gas field,providing significant insights for exploring struc-tural-lithologic flank zones and deep layers in offshore less-drilling regions.关键词
地震沉积学/储层构型/甜点预测/油气富集模式/西湖凹陷/花港组Key words
seismic sedimentology/reservoir architecture/sweet spot prediction/hydrocarbon enrichment pat-tern/Xihu Sag/Huagang Formation分类
海洋科学引用本文复制引用
娄敏..深层河流相储层描述与甜点预测技术及其在N气田的应用[J].海洋地质前沿,2026,42(4):75-87,13.基金项目
中海石油(中国)有限公司重大科技项目"东海低渗大气田高效开发关键技术研究与示范应用"(KJZX-2024-0102) （中国）
