中文摘要：

通过取心井常规薄片、铸体薄片、扫描电镜、X衍射等资料的分析,研究了塔里木盆地塔中地区古生界碎屑岩成岩作用及其对储层发育的影响。研究结果显示,研究区碎屑岩储层处于中成岩A期,且经历的主要成岩作用有压实与压溶作用、胶结作用、溶蚀作用、交代作用和重结晶作用等。另外,这些成岩作用对储集层孔隙发育及储层性质具有明显的影响：压实与压溶作用、交代、胶结作用、石英长石的次生加大以及重结晶作用使储层孔隙体积减小、物性变差,如压实与压溶作用使本区储层孔隙度损失14.1%~25.3%,交代、胶结作用使孔隙度损失13.9%;溶蚀作用是增加储集空间、改善储层物性最重要的成岩作用,如石英、长石及岩屑颗粒的溶蚀作用使储层产生次生孔隙,导致本区储层孔隙度平均增加6%~8%。

英文摘要：

Based on the full analysis of the data such as conventional section, cast section, X-ray diffraction and SEM, the Paleaozoic clastic diagenesis and its influence on elastic reservoir development in Tazhong area have been studied. The results of the study indicate that the elastic reservoir is in the stage A of middle diagenesis and the major diagenesis includes compaction, cementation（siliceous cementation, carbonate cementation and hydro- syalite cementation）, dissolution（feldspar, minor debris and carbonate cement）, alternation and fracture along with the sedimentary and diagenesis history. These diagenism has markedly influenced the pore development and physical properties of the reservoir. The mechanical compaction, the subsequent volcanism of quartz and feldspar has destructive influence on the physical properties of the reservoir. Compaction and pressure solution have in- duced the decrease in porosity（14.1%-25.3% ）, the cement has filled up and blocked the pore throat of sandstone in various ways; Secondary overgrowth of quartz could fill up the primary pore and is disadvantagous to generate secondary pore. Metasomatism makes the sandstone more dense and hard while dissolution is the major diagenesis for increase of the pore space and improvement of the properties of reservoir.