大庆石油地质与开发2024，Vol.43Issue(6)：49-60,12.DOI:10.19597/J.ISSN.1000-3754.202308015
塔里木盆地轮南地区三叠系层序格架内沉积相分布及演化规律
Distribution and evolution laws of sedimentary facies in Triassic sequence framework of Lunnan area in Tarim Basin
摘要
Abstract
The lack of systematic understanding of basic geology of Triassic clastic rocks and the unclear under-standing of sand bodies distribution law of Lunnan area of Tarim Basin restrict further exploration in this area,espe-cially the exploration of potential lithologic reservoirs,so systematic sedimentary facies research is very important.Sequence strata in this area are redefined by fully using core,logging and seismic data,and sedimentary facies dis-tribution and evolution laws in the sequence framework are determined.The results show that Triassic is divided in-to 4 3rd-order sequences including SQ1,SQ2,SQ3 and SQ4.Study of identification marks of sedimentary facies de-termines that that braided river delta facies,meandering river delta facies and lake facies are mainly developed in this area.shore-shallow lake subfacies dominated by mudstone developed during SQ1 sedimentary period,braided-river delta front subfacies developed during SQ2 sedimentary period,meandering river delta front subfacies devel-oped during SQ3 sedimentary period,braided river delta front subfacies developed during SQ4-TST sedimentary pe-riod(lacustrine transgressive system tract),and shore-shallow lacustrine subfacies dominated by mudstone devel-oped during SQ4-RST sedimentary period(lacustrine regressive system tract).SQ1-SQ4 sedimentary facies follows lacustrine-braided river deltaic-meandering river deltaic-braided river deltaica-lacustrine evolution law.The re-search results provides geological basis for further exploration of lithologic reservoirs in Lunnan area.关键词
层序地层/沉积相/沉积演化/塔里木盆地/轮南地区/三叠系Key words
sequence strata/sedimentary facies/sedimentary evolution/Tarim Basin/Lunnan area/Triassic分类
能源科技引用本文复制引用
高登宽,易珍丽,王铸坤,胡忠贵,石放,刘柳,李斌,杨孔航,李建浪..塔里木盆地轮南地区三叠系层序格架内沉积相分布及演化规律[J].大庆石油地质与开发,2024,43(6):49-60,12.基金项目
中国石油天然气股份有限公司重大科技专项"轮南地区三叠系—侏罗系沉积储层研究与滚动目标评价"(041021090103). （041021090103）
