吐哈盆地马场南中-上三叠统储集层孔隙结构特征

通过对吐哈盆地马场南地区中-上三叠统储集层的压汞、铸体、扫描电镜、孔渗等资料进行综合分析认为,该区克拉玛依组储集层的孔隙度较高,渗透率较低;其孔隙较小、喉道连通性较好、喉道分选较差、毛管压力曲线无明显平台;孔隙结构总体较好,储集层共分为四类,即高孔-中高渗-中粗喉型、中孔-低渗-中细喉型、中孔-特低渗-细喉型、低孔-特低孔-特低渗-细微喉型,以中孔-低渗-中细喉型储集层为主;影响孔隙结构的因素主要是碳酸盐胶结物的含量和溶蚀作用等。

Pore Structure Characteristics of Upper-Middle Triassic Reservoir of Machangnan Area in turpan-Hami Basin

Based on studies of pore cast thin section, electric scanning microscope, image analysis and mercury injection test of Triassic reservoir of Machangnan area in Turpan-Hami basin, the paper indicates that the pore structure characteristics of reservoirs in this area are not good. They were sorted into four classes. The predominant type of pore structure is middle pore-low permeability-tiny throat. In this area, pore is relatively small, throats are badly sorted, along with capillary curves showing no platform. The influence factors of reservoir are the content of cement and solution.