【摘要】 库车坳陷新生界沉积厚度巨大 ,沉积体系多样。其第三系储层岩石具有成分成熟度低、结构成熟度不高的特点 ,且在不同区域及不同沉积环境中表现出较大的差异性 ;而填隙物含量则普遍较高。储集空间类型为次生孔隙型 ,主要有粒间溶孔、粒内溶孔及超大孔隙、微孔隙和构造裂隙几种类型。下第三系孔隙度呈现南高北低及中部高、东西两端低的态势 ,渗透率表现为南高北低的趋势 ,东西变化不明显。研究区吉迪克组底砂岩的孔隙度呈东高西低、北低南高及周缘高 ,中部低的特点。储层厚度总的分布规律是 :下第三系储层呈东厚西薄、东粗西细特点 ,南北略具差异 ;吉迪克组底部砂岩是一套较为稳定的、可在全区进行区域追踪的薄砂层 ,平面上具有北厚南薄的分布规律。沉积相、成岩作用及构造因素共同控制了储层的发育更多还原

【Abstract】 The thickness of Cenozoic sedimentary is tremendous,and the sedimentary systems are multiple in Kuqa depression of Tarim Basin.The reservoir petrography property shows that its compositional maturity and textural maturity are lower and various in the different areas and sedimentary environments.In addition,the matrix contents of the different sedimentories are generally high.The secondary pore is the main type of the reservoir pore space,mainly including intergranular dissolution pore,intragranular dissolution pore,ultra_large pore,micro_pore and structural crack.The Paleogene porosity in the southern part of Kuqa Depression is higher than that in the northern part,and it is also higher in the center than that in the eastern and western parts of Kuqa Depression.The permeability of Paleogene reservoir tends to be higher in the south than that in the north,and the change of porosity is not distinct in the eastern and western of Kuqa Depression.The physical properties of the base sandstones of Jidike Formation in the study area show that the porosity in the east is higher than that in the west,and that in the south is higher than that in the north,and that in the circumference is higher than that of the middle part.The general thickness distribution rule of the reservoir exhibits that the Paleogene reservoir is thick and coarse in the east,and it is thin and fine in the west.The thickness and grain sizes of Paleogene reservoir in the south are very lightly different from those in the north.The base sandstone of Jidike Formation is a set of stable and thin sandstone beds for making some tracks in the region of the study area.The development of the reservoir was controlled by sedimentary facies,diagenesis and tectonics.更多还原