沉积与特提斯地质2018，Vol.38Issue(2)：74-81,8.
羌塘盆地隆鄂尼-鄂斯玛古油藏带中侏罗统布曲组岩相古地理研究
Sedimentary facies and palaeogeography of the Middle Jurassic Buqu Formation in the Longeni-Esima ancient oil reservoirs zone,Qiangtang Basin,northern Xizang
摘要
Abstract
The Longeni-Esima ancient oil reservoirs zone is the largest ancient oil reservoirs zone in the Qiangtang Basin,northern Xizang,where the oil-bearing formations generally occur in the dolostone strata from the Middle Jurassic Buqu Formation. In the Longeni-Esima ancient oil reservoirs zone,the oil-bearing dolostones horizons in the Middle Jurassic Buqu Formation consist mainly of the tidal-flat and subtidal shoal grainstones,algal-laminated dolostones and grainy dolostones. The grainstones and algal-laminated dolostones constitute the cyclic deposits in which the sedimentary structures such as algal-laminated structure and birdeye structure are developed,and the lagoon dark grey micritic limestone,argillaceous limestone and shell limestone are sandwiched as well. In the comparative analysis on the basis of the principle of dominant facies,the authors in this paper have reconstructed the sedimentary facies and palaeogeographic map showing the distribution of uplifted erosional areas,tidal flat facies,the lagoon facies and subtidal shoal facies,and the spatial distribution of source rocks and reservoir rocks and oil-gas reservoirs,and delineated the potential areas of residual oil and gas reservoir distribution in the study area. It is very important for the evaluation of the prospects of oil and gas resources,and the future oil and gas exploration and development in the study area.关键词
羌塘盆地/隆鄂尼-鄂斯玛/中侏罗统布曲组/岩相古地理Key words
Xizang/Longeni-Esima/Middle Jurassic Buqu Formation/sedimentary facies and palaeogeography分类
天文与地球科学引用本文复制引用
陈浩,陈明,孙伟,王羽珂..羌塘盆地隆鄂尼-鄂斯玛古油藏带中侏罗统布曲组岩相古地理研究[J].沉积与特提斯地质,2018,38(2):74-81,8.基金项目
中国地质调查局羌塘盆地金星湖-隆鄂尼地区油气资源战略调查项目(CZ2016013) （CZ2016013）
