CAJ | 학술논문

志留系柯坪塔格组是塔中北斜坡油气勘探重点层位之一。对其沉积相类型及沉积特征的认识长期以来一直存在分歧。结合前人研究成果，据钻井、测井及岩心资料对柯坪塔格组沉积相进行详细研究。结果表明，塔中北坡主要发育潮坪、滨岸-陆棚沉积体系，局部发育辫状河三角洲沉积，主要发育滨岸砂体、陆棚砂体、潮道、砂坪和三角洲水下分流河道等有利储集砂体。在对沉积相深入分析的基础上，建立了柯坪塔格组沉积模式，滨岸砂体储集性优于潮坪相砂体。
지류계가평탑격조시탑중북사파유기감탐중점층위지일。대기침적상류형급침적특정적인식장기이래일직존재분기。결합전인연구성과，거찬정、측정급암심자료대가평탑격조침적상진행상세연구。결과표명，탑중북파주요발육조평、빈안-륙붕침적체계，국부발육변상하삼각주침적，주요발육빈안사체、륙붕사체、조도、사평화삼각주수하분류하도등유리저집사체。재대침적상심입분석적기출상，건립료가평탑격조침적모식，빈안사체저집성우우조평상사체。
There is a lot of debate among different scholars on the type and characteristic of sedimentary facies in reser-voir of Kepingtage Formation of Silurian which is an important oil-producing district in the northern slope of Tazhong Area. Based on drilling,well logs and core data the sedimentary facies are studied in detail with previous study. The con-gclusions show that Kepingtage Formation deposited tidal flat,shoreline-neritic sedimentary system,and braided-river delta. The types of sandbody are shore sand,shelf sand,tidal channel,sand flat,underwater distributary channel. Based on the deliberate analysis of sedimentary facies,the authors set up the sedimentary model. The physical property of the shore sandstones is better than that of the sandstone of tidal flat. The sedimentary system is the geologic foundation for forming the lithologic trap. The establishmentof the sedimentary facies type and sedimentary model provide the basis for further reservoir prediction in the area.