塔河油田卡拉沙依组砂组沉积相与储层研究

卡拉沙依组砂岩是塔河油田石炭系重要储层，从上到下分为4个砂组，即Ⅰ砂组、Ⅱ砂组、Ⅲ砂组及Ⅳ砂组，根据岩石组合特征、岩石粒度、分选性、以及沉积构造等特征，可得出Ⅰ砂组为较典型的扇三角洲沉积环境；Ⅱ-Ⅳ砂组为潮坪环境，其中Ⅲ砂组沉积时的古环境水动力相对最强，以潮间带下部为主，储层砂体最发育，单个砂体的厚度也最大，为纵向上最好储层段。

KALASHAYI FORMATION RESERVE AND COMPREHENSIVE EVALUATIONIn TAHE OIL FIELD

The Kalashayi Formation Sand-shale Member is an important reservoir and pay zone of the Carboniferous Tahe Oil Field. It is divided into four Sands; from top to bottom they are: I Sand bed, II Sand bed, III Sand bed and IV Sand bed. The sedimentary facies of I Sand bed is fan-delta facies and the facies of II to IV Sandbeds are tidal flat facies. The hydrodynamic force of the palaeosedimentary environment was the strongest for III Sand bed. The facies of III Sand bed is primarily lower intertidal zone facies. Its reservoir is the most developed and its individual sand layer is the thickest. It is the best reservoir longitudinally.