CAJ | 학술논문

对昌都盆地上三叠统采集的25块流体包裹体样品进行了显微观察和显微测温、测盐等系统分析.显微观察结果证实了研究区古油藏的存在,同时指示晚三叠世早期存在活跃的油气运聚过程,晚期受热改造破坏而残留大量沥青.显微测温结果表明上三叠统发生过至少6幕流体充注,第1～4幕含烃流体活动明显.结合埋藏史分析可知,可能存在两期流体活动,分别发生在188.6～181.8 Ma(早侏罗世中期)和174.0～157.1 Ma(中侏罗世早期到晚侏罗世中期),其中第2期流体活动特征表现为连续充注的过程.
대창도분지상삼첩통채집적25괴류체포과체양품진행료현미관찰화현미측온、측염등계통분석.현미관찰결과증실료연구구고유장적존재,동시지시만삼첩세조기존재활약적유기운취과정,만기수열개조파배이잔류대량력청.현미측온결과표명상삼첩통발생과지소6막류체충주,제1～4막함경류체활동명현.결합매장사분석가지,가능존재량기류체활동,분별발생재188.6～181.8 Ma(조주라세중기)화174.0～157.1 Ma(중주라세조기도만주라세중기),기중제2기류체활동특정표현위련속충주적과정.
25 fluid inclusion samples have been taken the Upper Triassic in Changdu Basin. These samples are investigated by microscopic observations and micro-thermometry of homogenization temperature systematically. Microscopic observations indicate that the paleo-reservoir exists in the study area with active hydrocarbon generation-migration-accumulation processes in the early stage, but these processes must have been destroyed and reliced, leaving much bitumen. Micro-thermal analysis shows that there are six episodes of thermal fluid flow in the Upper Triassic, but the hydrocarbon fluid also appears in the first to the fourth episodes. Based on the homogenization temperatures, coupled with thermal and burial histories of the sedimentary basin, two fluid flow charging stages are determined to be 188.6-181.8 Ma(the Middle Early Jurassic) and 174.0-157.1 Ma(the Early Middle Jurassic-the Middle Late Jurassic), and the second fluid flow charging stage is a continuous process.