准噶尔盆地陆东地区白垩系储层特征及其主控因素

从岩石学特征、成岩作用、孔隙类型、结构特征以及储层性质的主要影响因素等方面 ,对准噶尔盆地陆东地区白垩系储层进行了研究。结果表明 ,储层岩石为长石质岩屑砂岩 ,成岩作用进入早成岩B亚期 ;孔隙类型主要为原生残余粒间孔 ,另有少量的溶蚀孔及微孔隙。该储层孔隙结构非均质性强 ,呼二段中粗孔喉最多 ,呼一段次之 ,连木沁组多为中孔细喉和较细喉 ,清水河组为细孔、细喉。储层性质差别较大 ,呼一段、呼二段为中孔、中渗储层 ,连木沁组为低孔、低渗储层 ,清水河组为低孔、特低渗储层。储层性质主要受沉积相、古气候、压实作用及砂岩粒径等因素的影响。

Basic feachers and controlling factors for cretaceous reservoir in Ludong area of Junggar Basin

The lithology, diagenesis, pore types, pore structure and the main controlling factors of the Cretaceous reservoir in Ludong area of Junggar Basin were investigated. It indicates that the reservoir is of feldspathic litharenite rock, and its diagenesis is in the B substage of diagenetic pre period. The pore types mainly include the remaining original inter particle pores, corrosion pores and micro pores. The pore structure has strong heterogeneity. There have many big and middle pore throats in Hu 2 section, and that of Hu 1 section is in the second place. There have the mid pore and fine throats in Lianmuqin Formation, and there exist thin throats in Qingshuihe Formation. The properties of reservoir are different in this area. Hu 2 and Hu 1 sections are the mid porosity and mid permeability reservoirs. Lianmuqin Formation is the low porosity and low permeability reservoir, and Qingshuihe Formation is the low porosity and lower permeability reservoir. The properties of reservoir are mainly dominated by sedimentary facies, ancient weather, compaction and sandstone diameters.