本文選題：彬長地區(qū) + 長7段��； 參考：《成都理工大學》2017年碩士論文

【摘要】：鄂爾多斯盆地中生界石油資源量大,彬長地區(qū)上三疊統(tǒng)延長組烴源巖發(fā)育,儲蓋組合配套,故其具有廣闊的勘探開發(fā)前景,因此明確長7段的沉積特征和儲層分布規(guī)律對今后的油氣勘探意義重大。論文通過對長7段野外露頭和室內巖心觀察,及其各小層的沉積微相特征、成巖相特征與儲層質量進行了細致研究,取得以下認識:(1)長7段為一套以砂質碎屑流沉積為主、濁流沉積為輔深水重力流沉積體系。其砂質碎屑流砂體常以多期疊置形式形成厚層砂巖,為長7段的主力砂體。(2)長7段砂巖的微觀非均質性強。不同類型的儲層常規(guī)分析物性相似,微觀特征差異較大,地層壓力作用下常表現(xiàn)出截然不同的物性特征。(3)長7段儲層砂巖的成巖作用類型和儲層的成巖序列得到明確,并總結出5種典型的成巖相(強溶蝕成巖相,弱溶蝕成巖相,強壓實成巖相,強鈣質膠結成巖相,微裂縫成巖相)及其測井特征。(4)長7段儲層發(fā)育主控因素得到明確,分別為巖石相,成巖相和裂縫。綜上分析得出,研究區(qū)的有利區(qū)域主要在砂體發(fā)育且厚度大的部位,砂體連片發(fā)育,同時在成巖作用上主要是以溶蝕作用為主的區(qū)域。而局部的裂縫發(fā)育區(qū),雖然其厚度可能較小,但是油氣富集的“甜點”區(qū)域。
[Abstract]:The Mesozoic petroleum resources in Ordos Basin are large, the source rocks of Yanchang formation of Upper Triassic in Bingchang area are developed, and the reservoir cap assemblage is matched, so it has a broad prospect of exploration and development.Therefore, it is of great significance for oil and gas exploration to clarify the sedimentary characteristics and reservoir distribution of Chang7 formation.Based on the field outcrop and indoor core observation of Chang7 member, and the sedimentary microfacies, diagenetic facies and reservoir quality of each sublayer, this paper has obtained the following understanding that the Chang 7 formation is mainly composed of sandy clastic flow deposits.Turbidite deposition is a secondary depositional system of deep water gravity flow.The sand detrital flow sand body often forms thick sandstone in the form of multi-stage superposition, which is the main sand body of Chang 7 member, and the microcosmic heterogeneity of Chang 7 member sandstone is strong.The physical properties of different types of reservoirs are similar and the microscopic characteristics are different. Under the action of formation pressure, the diagenesis types and diagenetic sequences of reservoir sandstone in Chang 7 member of formation pressure are usually shown to be very different, and the diagenetic types of sandstone and diagenetic sequence of reservoirs are clearly defined under the action of formation pressure.Five typical diagenetic facies (strongly dissolved diagenetic facies, weakly dissolved diagenetic facies, strongly compacted diagenetic facies, strongly calcareous colloidal diagenetic facies, microfractured diagenetic facies) and their logging characteristics.They are rock facies, diagenetic facies and fracture.From the above analysis, it is concluded that the favorable area of the study area is mainly in the area where the sand body develops and the thickness of the sand body is large, the sand body is connected with the slice, and the diagenesis is mainly the area dominated by dissolution.The local fracture development area, although its thickness may be small, but oil and gas-rich "dessert" area.
【學位授予單位】：成都理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：P618.13

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