塔里木盆地孔雀河斜坡孔探1井奥陶系综合地层学  

INTEGRATIVE STRATIGRAPHY OF THE ORDOVICIAN AT WELL KT1 IN THE KONGQUEHE SLOPE,TARIM BASIN

作　　者：陈绪云[1] 李慧莉 吕海涛[1] 张根法[1] 蔡习尧[2] 张琳娜[3,4] 陈旭[3] 

机构地区：[1]中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011 [2]中国石油化工股份有限公司石油勘探开发研究院,北京100083 [3]中国科学院南京地质古生物研究所,资源地层学与古地理学重点实验室,江苏南京210008 [4]中国科学院大学,北京100049

出　　处：《地层学杂志》2017年第2期134-141,共8页Journal of Stratigraphy

基　　金：国家重点基础研究发展计划(“973”计划)项目(2012CB214806);国家科技重大专项(2017ZX05036)共同资助

摘　　要：通过笔石划分孔雀河斜坡孔探1井奥陶系生物地层序列。黑土凹组上段灰黑色泥页岩属弗洛阶—达瑞威尔阶Acrograptus ellesae带-Undulograptus austrodentatus带,具有高自然伽马特征;下段灰色灰质泥岩属特马豆克阶Adelograptus victoriae-Kiaerograputs kiaeri带,与下伏突尔沙克塔格组黄灰色泥质灰岩分界清晰。黑土凹组—却尔却克组可划分出2个Ⅱ级层序以及4个Ⅲ级层序;3个Ⅱ级层序界面分别为早奥陶世开阔陆棚相向盆地相沉积转变面、中奥陶世盆地相向晚奥陶世浅海陆棚相沉积转换面、加里东晚期—印支期多期构造运动的叠合不整合面。SQ1与SQ2层序的TST与HST体系域为优质烃源岩发育段,SQ3层序的TST体系域也发育烃源岩。Based on Ordovician graptolite fossils from well KT1 in the Kongquehe Slope, the Heituwa Formation is divided into two members. The upper member is characterized with high GR and gray-black mudstone, and it is Floian-Darriwilian in age （Ac. Ellesae biozone-U, austrodentatus biozone）. The lower member is characterized by grey lime mudstone, can be clearly demarcated from underlying yellow-gray argillaceous limestone of Cambrian age, and is regarded as Tremadocian in age （Adelograptus victoriae-Kiaerograputs kiaeri biozone）. Ordovician strata at well TP2 include two second-order sequences, four third-order sequences. The boundaries between the second-order sequences are represented by the facies transition between Late Cambrian continental shelf deposits and Early Ordovician basinal facies, facies transition between Middle Ordovician basinal facies and Late Ordovician shallow shelf clastic sediments, and an unconformity related to the Late Caledonian-Indosinian tectonic movement. TST and HST systems tracts of the SQ1 and SQ2 sequences are high quality hydrocarbon source rocks, and TST systems tract of the SQ3 sequence is also hydrocarbon source rocks.

关 键 词：划分对比 笔石 奥陶系 孔探1井 塔里木盆地 新疆 

分 类 号：P534.42[天文地球—古生物学与地层学]