地质通报2017，Vol.36Issue(4)：591-600,10.
藏北羌塘盆地井下布曲组含油白云岩地球化学特征及其意义
Geochemical features of oil-bearing samples from the well in Buqu Formation in the Qiangtang Basin, northern Tibet, and their implications
摘要
Abstract
The Qiangzi-11 and 12 wells are the data well to reveal the distribution regularities of Longeni-Angdaerco palaeo-oil reservoirs.Together with the hydrocarbon source rock data of Buqu Formation,Xiali Formation,and Quse Formation from Qiangzi-2 well,the authors analyzed the oil-rock correlations based on the biomarker parameters composed of isoprenoid,steranes,and ter panes.The property of crude oil from Qiangzi-11 and 12 wells is of the same type.However,the biodegradation degree from Qiangzi-11 well is higher than that from Qiangzi-12.The biomarker parameters reveal that the organic matter mainly originated from algae.The crude oil was formed under weak reduction-reduction conditions and in a slightly salty water environment.The biomarkers of crude oil,composed of isoprenoid,terpane,and sterane,are closely related to those of the Buqu Formation in Qiangzi-2 well,and also show good correlation with those of the Xiali Formation and Quse Formation in Qiangzi-2 well.Combined with the TOC data of the hydrocarbon source rock in south Qiangtang Basin,the authors hold that the crude oil of the Longeni-Angdaerco palaeo-oil reservoir was mainly from the source rocks of Quse Formation,and partly from the Xiali and Buqu Formations,suggesting a mixture of sources.The result of this study may have some guidance significance for further oil-gas exploration.关键词
生物标志化合物/含油白云岩/布曲组/油-岩对比/羌塘盆地Key words
biomarker/oil-bearing dolomite/Buqu Formation/oil-rock correlation/Qiangtang Basin分类
天文与地球科学引用本文复制引用
王忠伟,王剑,付修根,陈文彬,卫红伟,宋春彦..藏北羌塘盆地井下布曲组含油白云岩地球化学特征及其意义[J].地质通报,2017,36(4):591-600,10.基金项目
国家自然科学基金项目《羌塘盆地海相油页岩:沉积环境、古气候及源区》(批准号:41172098)和中国地质调查局项目《羌塘盆地金星湖—隆鄂尼地区油气资源调查》(编号:DD20160159) （批准号:41172098）
