现代地质Issue(6)：1348-1355,8.
大川中地区须家河组层序-岩相古地理研究
Study of Sequence and Lithofacies Paleogeography of the Xujiahe Formation in the Large-Scale Central Sichuan
摘要
Abstract
The oil and gas exploration began in the 1940s in the Xujiahe Formation,Upper Triassic,Sichuan Basin,of which the second,the fourth and the sixth members are not only main aim strata,but also one of the most favorable horizons in search for new gas sources.According to core of drilling observation,the actual measurement of field section,the identification and analysis of microscope thin sections,and combined the research of sedimentary facies marks with petrology,well logging and seismology,it is indicated that fan delta, braid river delta and lakes are developed in the Xujiahe Formation,large-scale Central Sichuan,and further are divided into several subfacies and microfacies.Through the theory and technology of high resolution sequence stratigraphy,we identify two super long-terms and five long-terms of datum base-level cycles sequences in the Xujiahe Formation.Using the sedimentary theory as a guidance,we choose the long-term base-level cycle se-quences as isochronal stratigraphic units to map sequence-lithofacies paleogeography of Sichuan basin.The re-sult of maping diagram makes it clear that five long-term lithofacies-paleogeographic subsidence center,migra-tion direction and the distribution rule of sedimentary facies are strictly controlled by the Longmen orogenic belt and Micang Mountains with the nonsynchronous tectonic framework.关键词
大川中地区/须家河组/沉积相/层序 -岩相古地理Key words
large-scale Central Sichuan/Xujiahe Formation/sedimentary facies/sequence-lithofacies palaeo-geography分类
能源科技引用本文复制引用
张兵,王绪本,吴朝容,刘朋波,赵文龙..大川中地区须家河组层序-岩相古地理研究[J].现代地质,2013,(6):1348-1355,8.基金项目
中国石油川庆钻探工程有限公司重点研究项目（085-2009-11-WX -B01）。 （）
