摘要
塔中地区石炭系碳酸盐岩主要岩类为颗粒灰（云）岩和泥粉晶白云岩。成岩作用包括胶结作用、准同生白云石化作用、溶解作用、压实－压溶作用、膏盐化及去膏盐化作用。颗粒灰岩储集空间以晚期鲕压裂孔、深埋溶蚀孔、洞及压溶缝组合为特征；白云岩形成粒内溶孔（含铸模孔）－晶间溶孔储集空间组合。测试资料表明，泥粉晶白云岩为大孔粗－中喉型高孔高渗的Ⅰ类好储层；颗粒白云岩为中孔细喉型高（中）孔低渗的Ⅱ类中等储层；颗粒灰岩为小孔极细喉型低孔低渗的Ⅲ类差－非储层。横向上，在东部ＴＺ４井区和ＴＺ６井区，Ｉ，Ⅱ类白云岩储层与Ⅲ类灰岩储层呈２～４ｍ的互层；西部ＴＺ１０井区则以Ⅲ类灰岩储层为主。
The types of Carboniferous carbonate rocks in Tazhong area include grain limestone,grain dolomite and muddy to micritic dolomite.The diagenesises of the rocks are cementation, penecontemporaneous,dolomitization,dissolution,compactionpressure solution, gypsifiaction and degypsification.The limestone and dolomite rocks have undergone various processes of pore formationion aevolution.The pores in the grain limestone are combined with oolitic pressure pores,deep-buried dissolution pores,vugs andpressure fractures. The dolomites have d velopedointragranulart(moldic) and intercrystal pores. The lab data show that the micritic dolomite is fine reservoir rocks with high porosity, permeability and large pore-coarse or medium throat(Ⅰ),the grain dolomite is medium reservoir rocks with high porosity but low permeability, and medium pores and fine throat(Ⅱ)and the grain limestone is bad to nonreservoir rocks with low porosity and permeability as well as fine pore and fine throat(Ⅲ).TypeⅠ,Ⅱ are interbeded with type Ⅲ rocks in the eastern part of TZ4, TZ6 well areas with a total thickness of about 2～4m. In the western part of TZ10 well area, type Ⅲ is dominant, showing that there will be a great prospecting potential in the eastern part of Tazhong area.
出处
《江汉石油学院学报》
CSCD
北大核心
1995年第3期13-18,共6页
Journal of Jianghan Petroleum Institute
基金
塔里木石油勘探开发指挥部资助
关键词
碳酸盐岩
孔隙结构
储集层
石炭纪
塔里木盆地
carbonate rocks
diagenesis
pore evolution
pore structure:formation evaluation
Carboniferous period
Tarim basin
