塔里木盆地库车坳陷依奇克里克构造带侏罗系储层特征及成因

利用岩石薄片、物性等分析资料，对库车坳陷东部依奇克里克构造带低渗透储层特征及其成因进行了研究。依奇克里克构造带中下侏罗统储层岩石类型均为岩屑砂岩、含长石岩屑砂岩。岩石学总体特征为成分成熟度低，结构成熟度较高，岩石成分成熟度由北向南逐渐变好。储集空间类型在东西向也有所差异，东部吐格尔明地区主要为次生-原生孔隙型，西部依南地区主要为裂缝-次生孔隙型。储集性能平面非均质性较强，以低孔、低渗、特低孔、特低渗储层为主，东部吐格尔明地区明显优于西部依南地区。影响本区储集性能的主要因素有压实作用、沉积环境、岩石学特征、溶蚀作用及构造作用，但最主要的影响因素是埋藏压实作用，构造挤压作用的叠加加强了本区西部储层压实作用，但裂缝发育又使储集性能有所改善。

RESERVOIR CHARACTERISTICS AND GENESIS OF THE JURASSIC IN YIQIKELIKE TECTONIC ZONE OF KUQA DEPRESSION IN TARIM BASIN

According to the data of rock thin section, porosity and permeability, the characteristics of low permeability reservoirg and its genesis of the Jurassic in the Southern Yiqikelike tectonic zone of eastern Kuqa Depression in Tarim Basin are studied The results show the rock types of Lower Jurassic sandstone reservoirs are mainly litharenites and feldsparthic litharenites, which are characterized by lower compositional maturity and higher textural maturity The types of reservoir spaces are mainly secondary porosity primary porosity in the eastern region and crack secondary porosity in the western region The reservoir heterogeneity is of severity laterally Generally, the reservoirs have low porosity, low permeability or particularly low porosity and particularly low permeability The quality of reservoirs in Tugeerming area of the eastern region is superior to that of the southern region The factors controlling the reservoir quality are petrology, sedimentary environment, diagenesis and cracks The most important factor is the combination of the burial compaction and the structural stress, which results in the reservoir compaction in the west area Howerer, the cracks are favorable to the regervoir characteristics.