塔里木盆地北部地区白垩系—古近系储集性与储层评价  

Characteristics and evaluation of Cretaceous-Paleogene reservoirs in the northern Tarim basin

作　　者：朱如凯[1] 郭宏莉[1] 高志勇[1] 韩丹[1] 张丽娟[2] 孙玉善[2] 程明[2] 

机构地区：[1]中国石油勘探开发研究院石油地质实验研究中心,北京100083 [2]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《中国地质》2007年第5期837-842,共6页Geology in China

摘　　要：塔里木盆地北部地区白垩系—古近系储层岩性主要为岩屑砂岩和长石岩屑砂岩,主体处于中成岩阶段,主要储集空间为残留原生粒间孔、粒间溶孔、粒内溶孔、铸模孔、基质微孔,但在不同地区、不同层段岩石组成、成岩演化、孔隙组合类型有一定差异,导致储集性差异明显,储集性主要受原始沉积环境、成岩作用控制。根据不同地区、不同构造带古近系、白垩系储层岩性、物性参数等将本区储层分为4个级别,Ⅰ、Ⅱ类储层可以作为油气勘探的主要目的层,Ⅲ类储层属低渗透储层可以作为寻找天然气的目的层,而Ⅳ类储层为特低孔特低渗非常致密型储层,甚至为非储层。The main lithologies in the Cretaceous-Paleogene in the northern feldspathic litharertite, which are in the middle diagenetic stage. The main Tarim basin are litharenite and pore spaces are relict primary intergranular pores, intergranular solution pores, intragranular solution pores, pores in grain films and matrix micropores. However, there are certain differences in rock composition, diagenetic evolution and pore association types in different areas and intervals of strata, thus resulting in appreciable difference in hydrocarbon storage capacity, which is mainly controlled by the primary sedimentary environment and diagenesis. According to the lithologies and physical parameters of Paleogene and Cretaceous reservoirs in different areas and tectonic belts, the reservoirs in the region mainly fall into four classes. Classes Ⅰ and Ⅱ are main targets for oil and gas exploration and reservoirs of class Ⅲ belong to low-permeability ones and may serve as targets for gas exploration, while the class Ⅳ reservoirs are very low-porosity, very low-permeability and very compact type reservoirs and even nonreservoirs.

关 键 词：塔里木盆地北部地区 白垩系—古近系 成岩演化 储集性 储层评价 

分 类 号：P618.130.2[天文地球—矿床学]