Abstract: Well Kunan No.1 just located on the transitive region between the margin of easterncarbonate platform of Tarirn massif and Tardong geosynclinal basin. From Cambrian to Or-dovician period,the sedimentary features differ from shallow-water carbonate platform anddeep-water basin. Sedimentary processes identified include deep-water original position deposit,deep-water contour-culrent deposit,gravity-flow deposit and gravity-slide deposit.Thevertical profile has experienced the evolution of the sedimentary environments of deep-waterbasin and deep-water slope from early Cambrian to Ordovician,which shows a process thatthe carbonate platform margin had been progressed(accreted)towards the basin. The orignal position deposits in deep-water and oxygen-lacking basin can form rather good sourcerocks,whicb however,have reached the over-maturity stage.The value of calculated vitrinitereflectance rate(R_o

Key words: sedimentary type, sedimentary mechanism, gravity flow sedimentation, source rock, Tarim basin

摘要： 库南一井寒武-奥陶纪时期恰好位于塔里本地块乐部碳酸盐台地边缘与塔东槽盆之间的过渡带上,其沉积作用与沉积特征均不同于两侧的浅水碳酸盐台地和深水槽盆.已鉴别出的沉积作用包括深水原地沉积、深水等深流沉积、深水重力流沉积及重力滑塌沉积.自早寒武世至早奥陶世经历了从深水槽盆至深水斜坡环境的演化,反映了碳酸盐台地边缘不断向盆地推进(加积)的过程.深水缺氧盆地的原地沉积物是较好的生油岩,但已达到过成熟阶段,所换算的镜质体反射率值(R_o)为1.74%～2.04%,因此,已不具生油能力,但仍可作为较好的气源岩.

关键词: 沉积类型, 沉积机理, 重力流沉积, 生油岩, 塔里木盆地