准噶尔盆地东部五彩湾-石树沟地区二叠系平地泉组储层成岩作用及孔隙演化

DIAGENESIS AND POROSITY EVOLUTION OF PERMIAN PINGDIQUAN FORMATION IN WUCAIWAN-SHISHUGOU REGION OF THE EASTERN JUNGGAR BASIN

通过对岩心、薄片、铸体薄片、扫描电镜等多种资料的综合研究,详细阐述了准噶尔盆地东部五彩湾-石树沟地区二叠系平地泉组储层主要成岩作用的形成机理和作用方式,分析了成岩序次和孔隙演化。压实作用和胶结作用是原生孔隙和部分次生孔隙的主要破坏者,方沸石的溶蚀作用、压溶作用是次生孔隙的主要建造者。并指出1300～2300m为次生孔隙的发育段。

Based on the observation and study of a large number of cores and thin sections by cathodoluminescence and SEM, this paper expounds in detail the mechanism of the main diagenesis and its action mode and analyzes the diagenesis sequences and porosity evolution of the Permian Pingdiquan Formation in WucaiwanShishugou region of the eastern Junggar Basin. Cementation and compaction have destroyed almost all the primary pores and a part of secondary pores. The solution of the analcime and dolomitization have created a lot of secondary pores. The paper points out that the secondary pores mostly develop from 1300 to 2300 meters in the depth.