库车盆地古近纪—新近纪蒸发岩沉积演化特征及其资源效应初步探讨

库车盆地古近纪—新近纪时期具有巨厚的蒸发岩沉积,古近纪时期岩盐沉积的最大厚度达1 447.5 m,新近纪时期岩盐沉积的厚度有所减小,岩盐层最大厚度402 m。库车盆地在古近纪—新近纪时期沉积沉降中心也有所改变,从盆地西部的拜城凹陷转移到东部的康村—阳霞地区。库车盆地东西部蒸发岩岩体特征的差异,对此地区油气藏规模造成一定影响。初步判断库车盆地西部蒸发岩有可能比东部蒸发岩盐下形成的油气藏量较大。盆地中蒸发岩沉积中心的迁移对钾盐沉积也有重要影响。

Characteristics of Evaporites Sedimentary Evolution in Paleogene-Neogene Basin and Analysis of Available Resources in Kuqa Basin

This paper aims to do some distribute characterization and analyse study of the evaporate rock facies in the Kuqa basin,during the Paleogene and Neogene.Through these analysis,Kuqa basin developed thick evaporite deposition in Tertiary period.From Paleogene to Neogene,rock salt deposition thickness changed.The maximum deposition thickness of rock salt is 1447.5 m during the Paleogene,402 m during the Neogene.At the same time,deposition and sedimentation center changed in Tertiary period The deposition and sedimentation center went from Baicheng depression in west of the basin to Kangcun region in east of the basin.This difference of evaporate body characteristics of east and west in Kuqa basin,affected the scale of oil and gas pools.Through the analysis,the paper determined that the scale of oil and gas pools of western evaporate is larger than the eastern evaporate.In addition,the deposition and sedimentation center of evaporate moving influences the potash deposts.