本文關(guān)鍵詞： 白云石 含硅熱液 水巖反應(yīng) 滑石 碳酸鹽儲層　出處：《地質(zhì)論評》2017年06期 　論文類型：期刊論文

【摘要】：含硅熱液是影響深層白云巖儲層的一種重要的流體類型,其如何與白云巖相互作用以及能否促使深層有效白云巖儲層發(fā)育,是當(dāng)前流體地質(zhì)學(xué)與碳酸鹽儲層地質(zhì)學(xué)研究需要進(jìn)一步揭示的科學(xué)問題。本文以CaMg(CO_3)_2—SiO_2—H_2O體系為例,應(yīng)用熔融毛細(xì)硅管合成包裹體技術(shù)和原位激光拉曼光譜分析技術(shù),結(jié)合淬火微區(qū)X衍射、掃描電鏡觀察及能譜分析等手段,研究了富硅流體與白云石的水巖反應(yīng)機(jī)理。結(jié)果表明,白云石與富硅流體在100℃以上即可發(fā)生脫碳反應(yīng)產(chǎn)生CO_2,200℃時(shí)的反應(yīng)機(jī)理為:3CaMg(CO_3)_2(白云石)+4SiO_2+H_2O=Mg_3(Si_4O_(10))(OH)_2(滑石)+3CaCO_3+3CO_2。據(jù)此,認(rèn)為滑石這類富鎂硅酸鹽礦物可以作為白云巖儲層含硅熱流體作用的證據(jù)。深部富硅熱液沿?cái)嗔严蛏线\(yùn)移,與白云巖反應(yīng)后沉淀滑石等富鎂硅酸鹽礦物,繼而導(dǎo)致儲集空間的減少,但是氣相產(chǎn)物CO_2是重要的酸性氣體,可以在合適的地質(zhì)條件下溶蝕碳酸鹽礦物,有利于深埋條件下儲集空間的形成與保存。
[Abstract]:Silicon-bearing hydrothermal solution is an important fluid type that affects the deep dolomite reservoir, how it interacts with dolomite and whether it can promote the development of deep effective dolomite reservoir. Fluid geology and carbonate reservoir geology need to be revealed further. This paper takes CaMg(CO_3)_2-SiO_2-H_2O system as an example. The melt capillary silicon tube was used to synthesize inclusions and in situ laser Raman spectroscopy (LRS), combined with X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analysis of quenched microregions. The mechanism of water-rock reaction between silicon-rich fluid and dolomite is studied. The results show that the decarburization reaction between dolomite and silicon-rich fluid can take place at more than 100 鈩，

本文編號：1474798