發(fā)布時間：2018-04-19 12:57

  本文選題：本溪地層 + 潮坪沉積��； 參考：《西安石油大學(xué)》2015年碩士論文

【摘要】：本溪組是延長東南部天然氣重要產(chǎn)層之一,對其儲層特征及其與天然氣富集關(guān)系的研究對本區(qū)以及盆地天然氣下一步勘探具有重要意義。本文在前人研究的基礎(chǔ)上,以沉積學(xué)、儲層地質(zhì)學(xué)、天然氣地質(zhì)學(xué)、油氣成藏地質(zhì)學(xué)、測井地質(zhì)學(xué)等理論為指導(dǎo),收集利用了本區(qū)150余口井的地質(zhì)錄井、測井資料以及物性分析、巖石薄片鑒定、掃描電鏡、壓汞、試氣等資料,在對本溪組沉積特征、成巖作用、儲層物性、微觀孔隙結(jié)構(gòu)、非均質(zhì)性等方面研究的基礎(chǔ)上,進(jìn)行了儲層綜合分類,分析了儲層的控制因素,對儲層特征與天然氣富集關(guān)系進(jìn)行了探討。本區(qū)本溪組地層屬潮坪沉積,儲層主要為潮坪石英砂巖,本溪組氣藏主要發(fā)育在障壁砂壩和砂坪沉積砂體內(nèi),明顯受相帶的控制,與相帶分布具有很好的一致性。壓實作用、壓溶作用、膠結(jié)作用對孔隙發(fā)育起著破壞性作用,溶蝕作用則起著使孔隙增大的作用。主要屬于低一特低孔,低一特低滲儲層,孔隙類型有粒間孔、粒內(nèi)溶蝕孔和膠結(jié)物溶蝕孔等。儲層孔隙度、滲透率存在正相關(guān)關(guān)系,滲透率的變化在一定程度上受孔隙發(fā)育的影響控制。儲層物性無論是在垂向上還是平面上變化差異性都較大,儲層非均質(zhì)性強(qiáng)。研究結(jié)果表明:砂巖儲層物性越好,含氣飽和度越高;本溪組氣藏屬于典型的巖性氣藏,沉積相、成巖作用是氣藏富集的主控因素,其在很大程度上決定了物性好壞和氣藏產(chǎn)能大小;鼻狀構(gòu)造等因素對其油氣的分布富集有一定的控制作用。
[Abstract]:Benxi formation is one of the important natural gas producers in the southeastern part of Yanchang. The study of its reservoir characteristics and its relationship with natural gas enrichment is of great significance for the further exploration of natural gas in this area and the basin.On the basis of previous studies, based on the theories of sedimentology, reservoir geology, natural gas geology, oil and gas reservoir forming geology and logging geology, the geological logging of more than 150 wells in this area has been collected and utilized.Well logging data and physical property analysis, rock slice identification, scanning electron microscope, mercury injection, gas test, etc., based on the study of the sedimentary characteristics of Benxi formation, diagenesis, reservoir physical properties, microscopic pore structure, heterogeneity and so on.The comprehensive classification of reservoir is carried out, the controlling factors of reservoir are analyzed, and the relationship between reservoir characteristics and natural gas enrichment is discussed.The strata of Benxi formation in this area belong to tidal flat deposit, the reservoir is mainly tidal flat quartz sandstone, Benxi formation gas reservoir is mainly developed in barrier bar and sand flat sedimentary sand body, which is obviously controlled by facies belt, and is in good agreement with the distribution of facies belt.Compaction, pressure-solubilization and cementation play a destructive role in pore development, while dissolution plays an important role in pore enlargement.It mainly belongs to low low porosity and low low permeability reservoir. The pore types include intergranular pore, intragranular dissolution pore and cemented dissolution pore.There is a positive correlation between porosity and permeability, and the change of permeability is controlled to some extent by the development of porosity.Reservoir physical properties vary greatly both vertically and horizontally, and the reservoir heterogeneity is strong.The results show that the better physical property of sandstone reservoir, the higher gas saturation, Benxi formation gas reservoir is a typical lithologic gas reservoir, sedimentary facies and diagenesis are the main controlling factors of gas accumulation.To a great extent, it determines the physical properties and the productivity of gas reservoirs, and the nasal structure has a certain controlling effect on the distribution and enrichment of oil and gas.
【學(xué)位授予單位】：西安石油大學(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：1773186