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trachyte n.【地質學;地理學】粗面巖。

trachytic

Through observation , description , slice identification of cores and chemical analysis of whole rock , it is determined that the central volcanic rocks of the eastern depression are classified as four major types , i . e . basalt , trachyte , tuff and cataclasite of sedimentary volcanic rocks , in which trachyte is of basic series and potassium rock type 通過巖心觀察、描述,巖心薄片鑒定,全巖化學分析等資料,確定東部凹陷中段火山巖巖石類型分為4大類:玄武巖、粗面巖、凝灰巖和沉火山碎屑巖類,其中粗面巖類屬于堿性系列、鉀巖類型。

Several analysis methods such as casting slice , scanning electron microscope , porosity and permeability data , mercury injection data and density of fissures are used to study the reservoir properties of volcanic rocks in huang - yu - re area , the east sag of liaohe basin . volcanic rocks in this area are mainly composed of basalt , diabase , tuff and trachyte . the dominating type of volcanic reservoir space includes secondary solution pores and structural fissures 通過火山巖的常規物性分析壓汞分析和裂縫密度分析,結合鑄體薄片和掃描電鏡,研究了遼河油田黃于熱地區的火山巖儲層物性特征,認為該區火山巖儲層巖石類型主要有玄武巖輝綠巖凝灰巖和粗面巖,主要儲集空間類型為次生的構造裂縫和溶蝕孔縫。

Though matrix material from basalt is better than trachyte , the pore throats of trachyte reservoirs are better developed than basalt in respect of pore structures ; the overflow reservoirs have the best petrophysical conditions in trachyte and then the expulsion facies is the next 但從孔隙結構特征看,粗面巖儲層孔喉較玄武巖發育程度好,粗面巖中以溢流相儲層物性條件最佳,噴發相次之。

Through rock mechanics analysis , basalt has the most compression strength , while that of trachyte is relatively weaker 經巖石力學分析,玄武巖抗壓強度最大,粗面巖抗壓強度相對較弱。

The fractures in trachyte are better developed than that in the basalt 其中,粗面巖中裂縫的發育程度較玄武巖要好。