现代地质Issue(1)：163-170,8.
藏北羌塘盆地QK-1井中侏罗统烃源岩地球化学特征
Geochemical Characteristics of Hydrocarbon Source Rocks in the Middle Jurassic of Borehole QK-1 in the Qiangtang Basin,Northern Tibet
摘要
Abstract
The borehole QK-1 ,one of the scientific drilling holes of gas hydrate,is located at Biluocuo area in the Qiangtang Basin of northern Tibet,in which the silty mudstones of Xiali Formation(J2 x)and limestones of Buqu Formation (J2 b)were drilled.The geochemical characteristics of the abundance,type and maturity of or-ganic matters of the source rocks reveal the following aspects:the organic matter abundance of source rocks in Middle Jurassic is lower;the silty mudstones in Xiali Formation have reached be poor-medium source rocks with TOC of 0. 26% to 0. 38%,and the TOC values of limestones in Buqu Formation are between 0. 02% and 0. 08%,part of which has reached to be poor-hydrocarbon source rocks;the types of organic matters for source rocks in Xiali and Buqu formations are mainlyⅡ2-type or Ⅲ-type,which are beneficial to gas formation,and the source rocks of Xiali Formation is superior to that of Buqu Formation.The value of Ro for source rocks in this area is from 1 . 31%to 1 . 63%,showing that the organic matter has undergone a high-degree thermal evolu-tion and is in a high-maturity stage,and the organic matter in Xiali Formation is even in an over-maturity stage. Combining all factors favorable for the genesis of gas hydrates,it comes to the conclusion that Xiali Formation is a potential exploration target.关键词
烃源岩/地球化学特征/有机质/夏里组/布曲组/羌塘盆地Key words
hydrocarbon source rock/geochemical characteristic/organic matter/Xiali Formation/Buqu For-mation/Qiangtang Basin分类
天文与地球科学引用本文复制引用
肖睿,祝有海,王平康,庞守吉,张帅,黄霞..藏北羌塘盆地QK-1井中侏罗统烃源岩地球化学特征[J].现代地质,2015,(1):163-170,8.基金项目
国家科技专项项目（GZHL20110308，GZH201400301）；国家自然科学基金项目（41102021，41202099）。 （）
