【摘要】：本文以塔北地區(qū)寒武系碳酸鹽巖為研究對(duì)象,運(yùn)用碳酸鹽巖層序地層學(xué)、地震地層學(xué)、沉積學(xué)以及儲(chǔ)層地質(zhì)學(xué)等理論,結(jié)合區(qū)域地質(zhì)、巖芯觀察描述、室內(nèi)鏡下薄片分析、地震剖面、測(cè)井曲線、錄井等資料,開展本區(qū)寒武系層序、沉積相和儲(chǔ)層研究,通過(guò)儲(chǔ)層發(fā)育分布與層序、沉積相關(guān)系探討,結(jié)合儲(chǔ)層發(fā)育控制因素,研究工區(qū)白云巖儲(chǔ)層發(fā)育分布。井震充分結(jié)合,建立鉆井剖面和地震剖面寒武系三級(jí)層序格架,本次研究認(rèn)為塔北地區(qū)寒武系以劃分為10個(gè)三級(jí)層序?yàn)橐?其中,玉爾吐斯組劃為2個(gè)三級(jí)層序?yàn)橐?肖爾布拉克組劃為2個(gè)三級(jí)層序?yàn)橐?吾松格爾組劃為1個(gè)三級(jí)層序?yàn)橐?沙依里克組劃為1個(gè)三級(jí)層序?yàn)橐?阿瓦塔格組和下丘里塔格組劃為4個(gè)三級(jí)層序?yàn)橐�。三�?jí)層序可以實(shí)現(xiàn)全區(qū)對(duì)比,結(jié)合地震剖面層序分析,建立研究區(qū)寒武系三級(jí)層序?qū)Ρ雀窦�。通過(guò)巖石鏡下薄片觀察,根據(jù)白云巖結(jié)構(gòu)、構(gòu)造、顏色、組分的差異,結(jié)合研究區(qū)巖相古地理、沉積格局,分析得出研究區(qū)下寒武統(tǒng)玉爾吐斯組沉積相劃為陸棚、盆地相沉積;下寒武統(tǒng)肖爾布拉克組劃為盆地、緩坡相沉積,緩坡相又可進(jìn)一步劃分為外緩坡、中緩坡、內(nèi)緩坡;從下寒武統(tǒng)吾松格爾組到上寒武統(tǒng)下丘里塔格組時(shí),研究區(qū)寒武系發(fā)育碳酸鹽巖臺(tái)地模式,鉆井剖面上沉積相劃分為盆地、臺(tái)地邊緣、局限臺(tái)地,臺(tái)地邊緣又進(jìn)一步劃分為灘間、臺(tái)緣灘、潮坪微相,局限臺(tái)地又進(jìn)一步劃分為潮坪微相、瀉湖微相、臺(tái)內(nèi)灘微相。通過(guò)地震剖面劃分出沉積相帶邊界,結(jié)合厚度圖及已知井點(diǎn)沉積相,玉爾吐斯組平面上沉積相整體上為盆地相;肖爾布拉克組平面上沉積相為緩坡、盆地相;吾松格爾組平面上沉積相為局限臺(tái)地、緩坡、盆地;沙依里克組平面上沉積相為局限臺(tái)地、開闊臺(tái)地、臺(tái)地邊緣、斜坡、盆地相;阿瓦塔格組平面上沉積相為蒸發(fā)臺(tái)地、局限臺(tái)地、開闊臺(tái)地、臺(tái)地邊緣、斜坡、盆地相;下丘里塔格組平面上沉積相為局限臺(tái)地、開闊臺(tái)地、臺(tái)地邊緣、斜坡、盆地相。通過(guò)巖芯、薄片觀察和白云巖有序度分析,得出研究區(qū)寒武系白云石化作用主要為蒸發(fā)泵白云石化機(jī)制、滲透回流白云石化機(jī)制、淺埋藏白云石化機(jī)制、熱液白云石化機(jī)制。結(jié)合錄井、測(cè)井分析可知,研究區(qū)白云巖儲(chǔ)層主要為裂縫型儲(chǔ)層和溶蝕孔洞型儲(chǔ)層。大部分的原生孔隙已消耗殆盡,斷裂破碎作用、熱液溶蝕作用、風(fēng)化殼溶蝕作用是研究區(qū)寒武系儲(chǔ)層發(fā)育的主要機(jī)制。白云巖儲(chǔ)層發(fā)育區(qū)主要在天山南與巖溶作用有關(guān)的儲(chǔ)層發(fā)育區(qū)、受構(gòu)造斷裂控制的熱液白云巖儲(chǔ)層發(fā)育區(qū)、寒武系臺(tái)緣相地區(qū)。
[Abstract]:In this paper, the Cambrian carbonate rocks in the north of Tarim Basin are studied. The theories of sequence stratigraphy, seismostratigraphy, sedimentology and reservoir geology are used in this paper, combined with regional geology, core observation and description, and thin slice analysis under indoor mirror. Seismic profile, logging curves, logging data, etc., to study Cambrian sequence, sedimentary facies and reservoir in this area, and discuss the relationship between reservoir development distribution and sequence, sedimentary facies, combined with reservoir development control factors, The development and distribution of dolomite reservoir in the working area are studied. Well and earthquake are fully combined to establish the Cambrian third-order sequence framework of drilling profile and seismic profile. In this study, it is considered appropriate to divide Cambrian into 10 third-order sequences, among which, the Yuertuoshi formation is suitable to be divided into two third-order sequences. The Scholburak formation is suitable to be divided into two third-order sequences, the Wusongger formation to one third-order sequence, the Shairik formation to one third-order sequence, and the Awa tag formation and the lower Qiulitag formation to four third-order sequences. The third order sequence can realize the whole area correlation, combined with seismic profile sequence analysis, the Cambrian third-order sequence correlation framework is established in the study area. According to the difference of the structure, color and composition of dolomite, combined with the lithofacies paleogeography and sedimentary pattern in the study area, it is concluded that the sedimentary facies of the Lower Cambrian Yultux formation in the study area are classified as continental shelf and basin facies. The Lower Cambrian Scholburak formation is divided into basins with gentle slope facies and gentle slope facies which can be further divided into outer gentle slope, middle gentle slope and internal gentle slope, from the lower Cambrian Wisonger formation to the Upper Cambrian Lower Qiulitag formation, The Cambrian carbonate platform model is developed in the study area. The sedimentary facies in the drilling profile are divided into basin, platform margin, restricted platform, and platform margin, which are further divided into interbeach, platform margin and tidal flat microfacies. The limited platform is further divided into tidal flat microfacies, lagoon microfacies and beach microfacies within the platform. By dividing the boundary of sedimentary facies zone by seismic section, combined with thickness map and known well point sedimentary facies, the sedimentary facies on the plane of Yuertuoshi formation are basin facies as a whole, and the sedimentary facies on the plane of Scholburak formation are gentle slope and basin facies. The planar sedimentary facies of the Wusongger formation are confined platform, gentle slope and basin; the plane sedimentary facies of the Shaylik formation are confined platform, open platform, platform margin, slope and basin facies; the sedimentary facies on the plane of Awa tag formation are evaporative platform. Restricted platform, open platform, platform margin, slope, basin facies, and sedimentary facies on the plane of lower Qiulitag formation are limited platform, open platform, platform margin, slope, basin facies. Through core, thin slice observation and analysis of dolomite orderliness, it is concluded that the dolomitization mechanism of Cambrian in the study area is mainly dolomitization mechanism of evaporative pump, permeable reflux dolomitization mechanism, shallow buried dolomitization mechanism and hydrothermal dolomitization mechanism. Combined with logging and log analysis, the dolomite reservoirs in the study area are mainly fractured reservoirs and dissolved porosity reservoirs. The main mechanism of Cambrian reservoir development in the study area is that most of the primary pores have been exhausted fracture fragmentation hydrothermal dissolution and weathering crust dissolution are the main mechanisms for the development of Cambrian reservoirs in the study area. The dolomite reservoir development area is mainly located in the karst related reservoir development area in the south of Tianshan Mountain, the hydrothermal dolomite reservoir development area controlled by structural fault, and the Cambrian platform margin facies area.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13

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本文編號(hào)：2195462