西藏羌塘盆地中生代海相地层含油气系统及勘探方向  

PETROLEUM SYSTEMS AND EXPLORATION TREND OF MESOZOIC MARINE STRATA IN QIANGTANG BASIN OF TIBET AUTONOMOUS REGION

作　　者：丁文龙[1] 苏艾国[2] 李伟[2] 

机构地区：[1]中国地质大学 [2]北京石油勘探开发研究院

出　　处：《天然气工业》2003年第1期13-17,共5页Natural Gas Industry

基　　金：国家重大基础研究发展规划 (973 )项目资助

摘　　要：青藏高原地处著名的“特提斯”含油气构造域的中段 ,是我国目前尚未进行过全面石油勘探但又寄予希望的油气新区。其中 ,羌塘盆地是中国特提斯域最大和最具有含油气远景的沉积盆地 ,该盆地勘探程度较低。文章依据该盆地大量野外油气地质调查的实测资料和露头样品的地球化学与盆地模拟研究成果 ,根据盆地内油气显示与油源对比、中生代三套主力生油岩分布和背斜带发育特征及油气运移指向等 ,初步在羌塘盆地中生代海相沉积地层中划分出了三个含油气系统。并对含油气系统特征及形成与演化进行了分析 ,在此基础上 ,指出了油气勘探方向。这不仅对该盆地油气勘探具有重要指导作用 ,而且还将对中国特提斯域其它地区油气地质研究提供可借鉴的经验。Qinghai-Tibet Plateau is located at the middle segment of the well-known Tethys petroliferous structural domain.Not having been all-sidedly explored for oil and gas yet.it is a new hopeful petroliferous region.Qiangtang Basin is the largest and most prospective sedimentary basin of exploring for oil and gas in China Tethys structural domain,being a low exploration degree.In the paper,on the basis of a lot of field geological surveying data and outcrop geochemical samples and basin simulation achievements,three petroleum systems are preliminarily divided for the Mesozoic marine strata in Qiangtang Basin according to the contrast of oil and gas shows with oil sources,the distribution of three major source rocks in Mesozoic,the anticline belt growth characteristics and the hydrocarbon migration direction,etc.,then the oil and gas exploration trend is pointed out in light of analyzing the characteristics,formation and evolution of the petroleum systems,which not only is of important guiding effect on oil and gas exploration in the basin but also provides reference experience,method and theoretical basis for the research on oil and gas geology in the other areas of the China Tethys structural domain.

关 键 词：西藏 羌塘盆地 中生代 海相地层 含油气系统 

分 类 号：P618.13[天文地球—矿床学] TE12[天文地球—地质学]