【摘要】：本研究區(qū)的須三段地層是一套儲層基質(zhì)物性差、非均質(zhì)性強(qiáng)、致密性高、氣藏復(fù)雜的砂泥巖互層,目前處于勘探早期。本文在前人研究成果的基礎(chǔ)上,充分利用鉆井取心、掃描電鏡、鑄體薄片、測井、錄井、測試和化驗(yàn)分析等資料,針對研究區(qū)須三段的沉積特征、砂體分布特征、儲層特征、成巖作用、致密化進(jìn)程等方面進(jìn)行了研究,最終對研究區(qū)影響儲層發(fā)育的因素進(jìn)行了分析。研究認(rèn)為,劍閣-元壩地區(qū)屬于扇三角洲-湖泊的沉積環(huán)境,主要發(fā)育了扇三角洲前緣亞相、濱淺湖亞相,有利的沉積微相為水下分流河道微相、河口壩微相以及一部分席狀砂微相;巖石類型主要為細(xì)粒-中粒鈣屑砂巖,石英巖屑砂巖次之,還有少量的長石巖屑砂巖,顆粒間的雜基以粘土雜基為主,膠結(jié)物以碳酸鹽膠結(jié)物為主,儲集空間類型主要為粒間溶孔、粒內(nèi)溶孔、粘土雜基微孔;主要成巖作用類型有壓實(shí)、溶蝕、膠結(jié)等作用;成巖作用的成巖階段處于中成巖B期;儲層的致密化時間是J3sn(遂寧組)沉積末期;影響儲層發(fā)育的控制因素主要有構(gòu)造作用、沉積作用和成巖作用,沉積作用主要對儲層的發(fā)育的宏觀展布進(jìn)行控制,溶蝕作用作為建設(shè)性成巖作用是該地區(qū)層段出現(xiàn)次生孔隙的主要作用之一,壓實(shí)作用、膠結(jié)作用作為破壞性成巖作用,是儲層致密的最主要原因。而構(gòu)造作用作為大區(qū)域作用通過大幅度提高儲層滲透率而提高油氣產(chǎn)能,是儲層高產(chǎn)的重要條件。
[Abstract]:The Xu3 formation in this study area is a set of sandstone and mudstone interbeds with poor physical properties, strong heterogeneity, high compactness and complex gas reservoirs, which are in the early stage of exploration. On the basis of previous research achievements, this paper makes full use of the data of drilling coring, scanning electron microscope, casting thin slice, logging, testing and laboratory analysis, aiming at the sedimentary characteristics, sand body distribution characteristics, reservoir characteristics of the three members in the study area. The diagenesis and densification process are studied, and the factors affecting reservoir development in the study area are analyzed. It is considered that the Jiango-Yuanba area belongs to the fan-delta-lake sedimentary environment, which mainly develops the fan delta front subfacies, the shoreside shallow lake subfacies, and the favorable sedimentary microfacies are subaqueous distributary channel microfacies. Estuarine dam microfacies and some sheet sand microfacies; The rock types are mainly fine-grained and medium-grained calcareous sandstone, followed by quartz lithic sandstone, and a small amount of feldspar lithic sandstone. The intergranular complex is dominated by clay complex, and the cementation is dominated by carbonate cementation. The main types of reservoir space are intergranular dissolved pore, intragranular dissolved pore and clay heterogenous micropore. The main diagenesis types are compaction, dissolution, cementation, etc. The diagenetic stage of diagenesis is in stage B of middle diagenesis, and the densification time of reservoir is the end of J3sn (Suining formation). The main controlling factors affecting reservoir development are tectonic, sedimentary and diagenesis, and sedimentary processes mainly control the macroscopic distribution of reservoir development. Dissolution as a constructive diagenesis is one of the main reasons for the formation of secondary pores in this area. Compaction and cementation as destructive diagenesis are the main reasons for reservoir compaction. The tectonism, as a large area action, improves the oil and gas productivity by increasing the permeability of the reservoir, which is an important condition for the high yield of the reservoir.
【學(xué)位授予單位】：新疆大學(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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