塔里木盆地中部石炭系生屑灰岩储集层特征及评价

Reservoir Characteristics and Evaluation of Carboniferous Bioclastic Limestone in Central Tarim Basin

塔里木盆地石炭系生屑灰岩段储集层的主要储渗空间为白云石晶间孔、晶间溶孔、铸模孔、砂岩的粒间孔、溶洞和裂缝构成。砂岩和白云岩的储集层物性明显好于灰岩，而影响储集层物性的主要因素有沉积环境、成岩作用及构造断裂作用等。按碳酸盐岩储集层孔隙结构特征将生屑灰岩段储集层划分成四种类型并阐明其分布区域和层位。在综合了沉积相、成岩作用、构造断裂作用和储集层特征等因素分析基础上，对塔里木盆地中部生屑灰岩段有利的储集区带进行了评价预测，划分为四大类区，其中的I类区域是生屑灰岩段储集条件最有利的地区，也是今后进一步加强勘探的首选区域。

： The mostly reservoir space of Bioclastic Limestone Member reservoir are composed by dolomite intercrystalline pore， sandstone＇s intergranular pore， cave and crack in central Tarim basin． The reservoir qualities of sandstone and dolomites are better than limestone． Sedimentary environment， diagenesis and structures are main factors affecting reservoir quality． According to the characteristics of carbonate rock reservoir＇s pore structure， the Bioclastic Limestone Member reservoir can be divided into four types， and clarifying distributing area and distributing layer． Based on comprehensive factors analysis of sedimentary facies， diagenesis structures and reservoir characteristics， we evaluated and predicted the advantaged reservoir area of Bioclastic Limestone Member in central Tarim basin， divided it into four type areas， type Ⅰ is the best area of the Bioclastic Limestone Member reservoir condition， it is a first choice area for strengthening exploration efforts in future too．