柯克亚气田古近系凝析气藏储层特征

储层特征研究是气藏储层评价预测及滚动勘探开发方案制定的地质依据。为此，以岩心资料为基础，借助铸体薄片鉴定，分析了柯克亚气田古近系凝析气藏的储层沉积岩石学特征、储层微观空隙类型、孔隙结构特征以及储层物性特征，并结合毛细管压力分析资料，进行了该气田储层综合评价。研究结果认为：区内古近系凝析气藏储层空隙类型主要以孔洞、粒内溶孔和晶间孔为主，其次为溶蚀孔、压溶缝；储层孔隙结构有溶缝型、中孔中喉型、中孔细喉型及小孔细喉等4种类型；其中溶缝-孔隙型储层是该气田古近系凝析气藏的优质储层，主要发育于背斜顶部及断裂附近。

RESERVOIR CHARACTERISTICS OF PALEOGENE CONDENSATE GAS POOLS IN KEKEYA GAS FIELD, THE TARIM BASIN

Study of reservoir characteristics can provide a geologic basis for evaluation and prediction of gas reservoirs and progressive exploration and development planning.Based on core data,cast thin section analysis technique is used to study the sedimentological features,microscopic pore types,pore structure features and poroperm characteristics of the Paleogene condensate gas pools in Kekeya gas field.Moreover,the reservoirs are comprehensively evaluated in combination with the capillary pressure data.The dominant pore types of the Paleogene condensate gas pools in the study area are vug,intragranular dissolved pore,intercrystal pore,followed by vugular pore and pressolutional fracture.The pore structure types include dissolved fracture,medium-pore/medium-throat,medium-pore/small-throat,and small-pore/small-throat.The dissolved-fracture/pore type reservoirs are superior in the Paleogene condensate gas pools in Kekeya gas field,and they mainly occur at the top of anticlines and near fractures.