本文關(guān)鍵詞：川中地區(qū)下寒武統(tǒng)龍王廟組白云巖陰極發(fā)光特征與成巖作用　出處：《成都理工大學》2016年碩士論文　論文類型：學位論文

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【摘要】：四川盆地中部地區(qū)寒武系龍王廟組白云巖儲層是我國近年發(fā)現(xiàn)的重要天然氣儲層。本文在鉆井巖心密集采樣的基礎(chǔ)上,以沉積巖石學、地球化學等理論為指導,結(jié)合前人研究成果,綜合運用鑄體薄片觀察、陰極發(fā)光分析、微量元素分析等多種技術(shù)手段,詳盡的研究了研究區(qū)白云巖的巖石學特征、陰極發(fā)光特征、微量元素特征、成巖流體類型和成巖作用類型,建立了成巖作用序列。結(jié)合鉆井巖心觀察、鑄體薄片觀察及陰極發(fā)光分析,將研究區(qū)的巖石類型劃分為粉—細晶白云巖、富溶孔粉—細晶白云巖、粉—細殘余砂屑白云巖和殘余鮞粒白云巖,并詳細闡述了各類巖石特征。通過微量元素分析和陰極發(fā)光分析發(fā)現(xiàn):川中龍王廟組白云巖整體具有較高的Fe(均值952×10-6)、Mn(均值191×10-6)含量,同時整體具有較弱的陰極發(fā)光強度;各個類型白云巖發(fā)光情況各有不同,其中:結(jié)晶白云巖發(fā)光性最弱,富溶孔具有三類巖石中最強的發(fā)光強度,殘余砂屑白云巖發(fā)光性介于二者之間,與其各自的Fe、Mn含量和Fe/Mn值相對應(yīng)。因此龍王廟組儲層的陰極發(fā)光特征主要受到巖石結(jié)構(gòu)控制。結(jié)合陰極發(fā)光特征和碳氧同位素特征得出:川中地區(qū)龍王廟組地層先后經(jīng)歷了準同生階段同生海水和大氣淡水、準同生作用最后階段的高鹽度海水、表生作用階段大氣水、中—深埋藏作用階段深部流體等復雜的流體影響。川中地區(qū)寒武系龍王廟組儲層經(jīng)歷了包括壓實作用和晚期膠結(jié)作用的破壞性作用;壓溶作用、早期白云巖化作用、溶蝕作用、烴類充注作用、構(gòu)造破裂作用等的建設(shè)性作用;泥晶化作用、早期膠結(jié)作用的保持性作用的一系列復雜的成巖作用過程。
[Abstract]:The dolomite reservoir of the Cambrian dragon Wang Miao formation in the Cambrian in the middle of the Sichuan basin is an important natural gas reservoir found in China in recent years. Based on the drilling core density sampling, the sedimentary petrology and geochemistry theory, combined with the previous research results, the integrated use of casting thin section observation, cathodoluminescence, a variety of techniques for trace elements analysis, an exhaustive study of the petrology, dolomite in the study area, the cathodoluminescence features of trace element characteristics, diagenetic fluid types and diagenesis, build the diagenesis sequence. Combined with drilling core observation, cast thin section observation and cathodoluminescence analysis, the rock types of the study area was divided into fine fine crystalline dolomite, rich pore fine fine crystalline dolomite, fine fine residual dolarenite dolomite and residual oolitic dolomite, and elaborates the characteristics of all kinds of rocks. Through the analysis of trace elements and the cathodoluminescence analysis found: Sichuan in Longwangmiao formation dolomite has a higher overall Fe (mean 952 x 10-6), Mn (mean 191 x 10-6) content, while the whole cathode has weaker luminous intensity; various types of dolomite emission situation is different, including: Crystal dolomite luminescence the weakest, rich pores have the strongest luminescence intensity of three rock types, between the residual dolarenite luminescence between the two, and their Fe, Mn content and Fe/Mn values. Therefore, the cathodoluminescence characteristics of the reservoir in the long Wang Temple formation are mainly controlled by the rock structure. Combined with cathodoluminescence features and characteristics of carbon and oxygen isotopes that Sichuan Longwangmiao formation has experienced penecontemporaneous stage with seawater and meteoric water, quasi final stage of syngenesis high salinity and supergenesis stage atmospheric water, and deeply buried fluid effects of deep fluid phase complex. Sichuan in the Cambrian Longwangmiao reservoir experienced including compaction and late cementation of destructive effects; early pressure solution, dolomitization, dissolution, hydrocarbon filling effect, tectonic disruption such as constructive role; role of maintaining micritization, early binding effect of a series of the complex diagenesis process.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2016
【分類號】：P618.13

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