本文選題：準(zhǔn)噶爾盆地　切入點：烏爾禾　出處：《成都理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：熱水沉積一直是各國地質(zhì)學(xué)界的前沿問題和研究熱點,國內(nèi)外針對湖相熱水沉積巖的相關(guān)研究報道相對較少。烏爾禾地區(qū)風(fēng)城組致密油儲層是一套成因非常特殊的湖相“暗色細(xì)粒含鹽火山-沉積建造”,巖性為富含鹽類礦物的深湖相云質(zhì)巖類,早期的研究認(rèn)為屬較罕見的湖底熱液噴流沉積成因。這套深湖沉積建造中發(fā)育了大量鹽類礦物,如白云石、鐵白云石、硅硼鈉石、碳酸鈉鈣石、蘇打石、石鹽、硬石膏等,引起了作者所在團隊的高度關(guān)注,但卻在前期的研究很少提及。本文充分調(diào)研前人對海相/湖相、蒸發(fā)/熱液成因鹽類礦物的研究成果,以沉積學(xué)、巖石學(xué)、礦物學(xué)、儲層地質(zhì)學(xué)和地球化學(xué)等學(xué)科理論為指導(dǎo),通過鉆井巖心觀察,薄片鑒定,掃描電鏡分析,X衍射分析,電子探針分析,同位素分析,微量元素分析,稀土元素分析,包裹體顯微測溫和激光拉曼分析等技術(shù)手段,圍繞著研究區(qū)風(fēng)城組鹽類礦物展開深入的研究。通過分析研究區(qū)的區(qū)域構(gòu)造背景、沉積環(huán)境、巖石學(xué)和礦物學(xué)特征,得出鹽類礦物的特征,并證明研究區(qū)風(fēng)城組的鹽類礦物與現(xiàn)代蒸發(fā)鹽湖沉積的特有鹽類礦物不同,凸顯出特殊性。分析地球化學(xué)特征,得出成礦流體的性質(zhì)及來源,并證明沉積環(huán)境為相對封閉、還原、有間歇性海水混入的深湖環(huán)境。在此基礎(chǔ)上得出鹽類礦物的成因類型,并建立起研究區(qū)風(fēng)城組湖相鹽類礦物的內(nèi)、外源混合成因的深盆熱液雙擴散對流成鹽模式。
[Abstract]:Hot water deposition has always been a frontier problem and research hotspot in the geological circles of various countries. There are relatively few reports on lacustrine hydrothermal sedimentary rocks at home and abroad. The dense oil reservoir of Fengcheng formation in Wuerhe area is a set of very special lacustrine facies "dark fine-grained salt-bearing volcano-sedimentary formation", and its lithology is salt-rich. Deep-lacustrine dolomites of mineralogy, Early studies considered it to be a rare source of hydrothermal jet deposition at the bottom of the lake. In this set of deep lake sedimentary formations, a large number of salt minerals, such as dolomite, iron dolomite, boronite, sodium carbonate, soda, stone salt, anhydrite, etc., were developed. In this paper, the previous researches on marine / lacustrine facies, evaporation / hydrothermal genesis, salt minerals, and sedimentology, petrology, mineralogy, etc. Guided by the theories of reservoir geology and geochemistry, through drilling core observation, thin section identification, scanning electron microscope analysis, electron probe analysis, isotope analysis, trace element analysis, rare earth element analysis, The inclusion microthermometry and laser Raman analysis are used to study the salt minerals of Fengcheng formation in the study area. By analyzing the regional tectonic background, sedimentary environment, petrology and mineralogical characteristics of the study area, The characteristics of salt minerals are obtained, and it is proved that the salt minerals of Fengcheng formation in the study area are different from the special salt minerals of the modern evaporative salt lake deposits. It is proved that the sedimentary environment is a deep lake environment with relatively closed, reduced and intermittent seawater mixing. On this basis, the genetic types of salt minerals are obtained, and the interior of lacustrine salt minerals of Fengcheng formation in the study area is established. A deep basin hydrothermal double diffusion convection salt formation model of mixed exogenous origin.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P618.13

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本文編號：1565570