川东北黄莲峡地区长兴组生物礁地震异常特征及油气勘探潜力  

SEISMIC ANOMALY AND HYDROCARBON EXPLORATION POTENTIAL OF CHANGXING FORMATION BIOREEF,HUANGLIANXIA REGION IN NORTHEAST SICHUAN

作　　者：邹军成[1] 梁西文[1] 李莎[1] 

机构地区：[1]中石化江汉油田分公司勘探开发研究院

出　　处：《天然气勘探与开发》2007年第4期15-18,26,共5页Natural Gas Exploration and Development

摘　　要：通过见天坝生物礁等地面露头剖面和井资料的沉积相及层序地层、地震模型正演、地震剖面地震相等的详细研究表明:川东北黄莲峡地区处于二叠系长兴期城口—鄂西海漕与川东开阔台地相的结合部位;黄莲峡地区长兴组生物礁地震异常具有典型的台地边缘进积型层序地层特征,飞仙关组有可靠的上超现象,礁核内部为杂乱反射特征,是台地边缘礁的反映;城口—鄂西海槽向川东碳酸岩盐台地内部万县、云阳方向延伸,台地边缘礁异常沿城口—鄂西海槽边沿分布,边沿礁异常发育,且成藏条件优越,可与开江广旺地区对比,勘探潜力较大。In Jiantianba bioreef, the analysis of outcrop and well data, the research of depositional facies and stratigraphic sequence and the study of seismic model forward and seismic facies illustrate that Huanglianxia region of Northeast Sichuan is situated at the conjunction of both the Chengkou-Exi Trough, which was Permian Changxing age, and the open platform facies of Northeast Sichuan. Furthermore, the results also show that the seismic anomaly of Changxing Formation bioreef is characterized by typical platform marginal progradation, the Feixianguan Formation is reliably onlap, and the interior of bioreef nuclear is featured by disorderly reflection, representing the platform marginal bioreef. The trough expands to Wanxian and Yunyang, the interior of carbonate platform in east Sichuan. The platform marginal bioreef distributes along the trough margin, and the bioreef with favorable reservoir-forming condition is very developed. The exploration potential of Huanglianxia region is large in comparison with Kaijiang-Guangwang region.

关 键 词：川东北 台地边缘 生物礁 模型正演 长兴组 

分 类 号：P618.13[天文地球—矿床学]