潜江凹陷新沟嘴组下段Ⅱ油组天文旋回识别及区域地层对比  

Astronomical cycle identification and regional stratigraphic correlation of the Lower Member II,Xingouzui Formation,Qianjiang Depression

作　　者：李铭华 易小芹 罗书行 LI Minghua;YI Xiaoqin;LUO Shuxing(Research Institute of Exploration&Production,Sinopec Jianghan Oilfield Company,Wuhan,Hubei 430223,China)

机构地区：[1]中石化江汉油田分公司勘探开发研究院,湖北武汉430223

出　　处：《江汉石油职工大学学报》2024年第6期10-13,共4页Journal of Jianghan Petroleum University of Staff and Workers

摘　　要：潜江凹陷位于江汉盆地北东部,新沟嘴组为主要烃源岩层系。为建立新沟嘴组下段Ⅱ油组地层对比框架,基于天文旋回理论,对自然伽马(GR)进行处理分析,对新391井、马89斜-3井等井进行旋回地层划分,分析各井沉积速率和岩相变化。结论指出,潜江凹陷新下段Ⅱ油组可分为湖扩体系域、早期高位体系域和晚期高位体系域,沉积时间约0.8Ma。依据天文旋回建立的地层对比格架为区域地层对比提供新的视角,为江汉V C C油田勘探开发奠定地质基础。The Qianjiang Depression,located in the northeastern Jianghan Basin,has the Xingouzui Formation as its primary hydrocarbon source rock.To establish a stratigraphic correlation framework for the Lower Member II of the Xingouzui Formation,gamma ray(GR)data were analyzed based on astronomical cycle theory.Stratigraphic divisions and depositional rate analyses were conducted for wells Xin-391 and Ma-89X-3.Results reveal three depositional system tracts-lacustrine expansion,early highstand,and late highstand-spanning approximately 0.8 Ma.This stratigraphic framework provides new perspectives for regional correlation and geological insights for oilfield exploration.

关 键 词：潜江凹陷 新沟嘴组 天文旋回 地层对比 

分 类 号：P534.6[天文地球—古生物学与地层学]