塔中中上奥陶统礁、滩相储层的特征及评价

塔中中上奥陶统碳酸盐岩储层是在一发育良好的镶边陆棚体系中形成的礁、滩组合,并经过后期多次成岩和构造破裂作用改造而成。储层的储集空间类型多样,孔隙结构复杂,非均质性强。储层可划分四种类型,以裂缝—孔洞型和裂缝—孔隙型的储层质量最优。储层质量好坏和分布主要受沉积相类型、埋藏溶蚀作用强度和构造破裂作用强度的共同控制。运用多因素叠合概率法对本区优质储层的分布区域进行定量评价和预测表明,优质储层主要沿塔中I号断层上盘附近呈带状分布,同时在塔中10构造带东段也有分布。

THE CHARACTERISTICS AND EVALUATION OF MIDDLE & UPPER ORDOVICIAN REEF & SHOAL-RELELATED CARBONATE RESERVOIR IN TAZHONG NORTH SLOPE,TARIM BASIN

The Middle and Upper Ordovician carbonate reef and shoal assemblae originally formed in a rimmed shelf system , and then reworked by multi-phases diagenesis and structural fracturing. It has many kinds of pore spaces and the pore-throat structure is very complicated with obvious heterogeneity. The reservoir can be divided into four types. Among them the quality of fracture type and fracture-pore type are better than others. The quality and distribution of reservoir are controlled by the depositional facies, buried solution and structural fracturing. According to the evaluation and prediction ,the favorable zones of carbonate reservoir are distributed along the upper side of ,and they exist in the east section of Tazhong 10 BELT. The No.1 Fault.