CAJ | 학술논문

据岩心、录井、测井、分析化验、地震等资料，研究了塔中地区柯坪塔格组上段下亚段沉积相及其分布规律。研究表明，上段下亚段为障壁海岸环境，沉积滨岸相、障壁岛相和潮坪相，局部发育辫状河三角洲相。受古地形和水动力机制控制，上段下亚段沉积相总体呈EW向展布、NS向分带特征。从盆地边缘向中心，沉积相由潮坪相演变为滨岸相，向北与浅海陆棚相相接，而辫状河三角洲相呈镶嵌状，沿古海岸线分布，侧向与潮坪相相连。研究区上段下亚段由北向南超覆沉积，存在岩性-地层油气藏的可能，是该区下一步油气勘探的有利目标。
거암심、록정、측정、분석화험、지진등자료，연구료탑중지구가평탑격조상단하아단침적상급기분포규률。연구표명，상단하아단위장벽해안배경，침적빈안상、장벽도상화조평상，국부발육변상하삼각주상。수고지형화수동력궤제공제，상단하아단침적상총체정EW향전포、NS향분대특정。종분지변연향중심，침적상유조평상연변위빈안상，향북여천해륙붕상상접，이변상하삼각주상정양감상，연고해안선분포，측향여조평상상련。연구구상단하아단유북향남초복침적，존재암성-지층유기장적가능，시해구하일보유기감탐적유리목표。
Based on drilling cores,mud logging,electric logging,seismic data,etc.,the sedimentary facies and their distribution rules,in the lower submember of the upper member of Silurian Kepingtage formation of Tazhong area in Tarim basin,were studied in the paper.The study shows that the sedimentary environment was barrier coast,which was made up of shoreland,barrier island,tidal flat,and partly braided-river delta.The sedimentary facies in the lower sub member of the upper member were distributed from east to west and different from south to north,in which the facies were gradually changed from tidal flat in the south to the shoreland and continental shelf in the north,and the braided-river delta was independently located along the palaeo-shoreline and laterally to the tidal flat,and they were mostly con-trolled by the palaeotopography and multi-hydropower.With the overlapping to the south and the multi-sandbodies, there are some possible litho-strata hydrocarbon reservoirs in the lower part of the upper member,which should be next payable target of oil and gas exploration in the area.