岩矿测试2018，Vol.37Issue(1)：87-95,9.DOI:10.15898/j.cnki.11-2131/td.201703230037
渝东北城口地区Y1井页岩有机地球化学特征及勘探前景
Organic Geochemical Characteristics of the Shale from Y1 Well in Chengkou Area of Northeastern Chongqing and Exploration Prospects
摘要
Abstract
A study has been conducted based on the drilling data and geochemical data from the Y1 Well in Chengkou of Northeastern Chongqing,including total organic carbon(TOC),kerogen microcomponent,equivalent vitrinite reflectance(Ro)and carbon isotope composition,which are the organic geochemistry characteristics of Wufeng—Longmaxi Formation shale.The characteristics of shale gas accumulation were determined by analyzing the microstructure,homogenization temperature and laser Raman data of fluid inclusions in the shale.Results show that carbonaceous shale is well developed in Upper Ordovician Wufeng Formation and Lower Silurian Longmaxi Formation in the Y1 Well.Organic-rich shale(TOC>2%)has a thickness up to 83 m.The kerogen type of the samples is mainly TypeⅠ,belonging to the moisture hydrocarbon generation stage.Numerous hydrocarbon inclusions and hydrocarbon-rich brine inclusions with methane gas in the fractured veins of shale indicate that the shale of Wufeng Formation—Longmaxi Formation in the Chengkou area has been supplied with sufficient shale gas. The associated brine inclusions with high homogenization temperature and high salinity indicate good preservation conditions during the shale gas accumulation period in the Chengkou area.The exploration results of the Y1 Well reveal good exploration prospects for shale gas in the lower Paleozoic strata in the Chengkou area.关键词
城口地区/五峰组—龙马溪组/流体包裹体/有机地球化学特征/页岩气勘探前景Key words
Chengkou area/Wufeng—Longmaxi Formation/fluid inclusions/organic geochemistry characteristics/exploration prospects of shale gas分类
能源科技引用本文复制引用
何廷鹏,栾进华,胡科,李甜,杨柳,张跃磊..渝东北城口地区Y1井页岩有机地球化学特征及勘探前景[J].岩矿测试,2018,37(1):87-95,9.基金项目
重庆市国土资源和房屋管理局科技计划项目(CQGT-KJ-2014015) （CQGT-KJ-2014015）
