SILICEOUS CEMENTATION OF SANDSTONE RESERVOIRS IN No.1 SECTION OF THE DAINAN FR. OF THE GAOYOU DEPRESSION AND ITS INFLUENCE OVER THE RESERVOIR PROPERTIES
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摘要: 本文通过铸体薄片、扫描电镜、X-衍射分析及阴极发光显微镜研究后认为,导致Edl段储层失去大量孔隙空间和在酸化增产措施中效果不佳的主要原因为硅质胶结作用.提出了对于硅质胶结程度较发育的储层,在油田开发酸化增产过程中,应采用氢氟酸处理,可获较好效果.Abstract: Based on the microscopic-analysis on casting thin sections,SEM,X-ray diffraction and cathodoluminescence,the author believes that the silicic cementation is the dominant cause for the reduction of a large amount of pores in Ed1 reservoir and the poor effects from acidization procedures for production improveme.Therefore,it is proposed that hydrofluoric acidizing process should be adopted on the reservoirs with well-developed silicic cementation when the acidization procedure are applied to oil/gas development,which does show good effects.
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