本文關(guān)鍵詞：準(zhǔn)噶爾盆地西北緣哈山地區(qū)石炭系火山巖儲層特征研究　出處：《吉林大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 準(zhǔn)噶爾盆地 哈山地區(qū) 石炭系 火山巖 巖性巖相 成巖作用 儲層特征

【摘要】：本文以哈山地區(qū)5口鉆井所揭示的石炭系火山巖為研究目標(biāo),應(yīng)用巖心、巖屑、測井、錄井資料,結(jié)合前人研究成果認(rèn)識,總結(jié)出所發(fā)育的巖性巖相類型。通過巖心、鑄體薄片觀察,結(jié)合實測孔滲、核磁孔隙度、含油飽和度和面孔率數(shù)據(jù)等,總結(jié)出火山巖有效儲集空間類型及其組合、演化過程,并識別甄選出火山巖儲層的優(yōu)勢巖性巖相類型。主要獲得的認(rèn)識和結(jié)論如下:1、火山巖巖性、巖相及有效儲集空間研究區(qū)共發(fā)育火成巖巖石類型6類25種,以基性為主,其次是中性;火山巖巖相4相9亞相,以爆發(fā)相空落亞相為主,其次是噴溢相下部亞相;火山巖有效儲集空間類型2類4亞類15種,孔縫組合類型8種,以次生孔縫為主。2、火山巖儲層發(fā)育的優(yōu)勢巖性巖相綜合考慮物性和含油飽和度,以爆發(fā)相空落亞相的經(jīng)濟(jì)開發(fā)意義最高,巖性類型以玄武質(zhì)/安山質(zhì)/英安質(zhì)/流紋質(zhì)/復(fù)成分火山碎屑巖為主,其次是噴溢相的下部亞相、爆發(fā)相熱碎屑流亞相與噴溢相的上部亞相,而火山通道相和火山沉積相成儲性能較差,更趨向于形成非有效儲層。3、儲集空間的影響因素、演化過程及發(fā)育程度研究區(qū)火山巖儲集空間受巖性、巖相、成巖作用影響,其發(fā)育、演化過程可以劃歸為3個主階段5個亞階段,有效儲集空間類型以次生孔縫為主。次生孔縫以填隙物溶蝕孔和基質(zhì)溶蝕孔最為發(fā)育,說明溶蝕作用明顯改善火山巖的儲集性能。研究區(qū)石炭系淺層火山巖儲層儲集能力最佳,和本地區(qū)風(fēng)化殼發(fā)育深度有關(guān),而且當(dāng)前原生孔保留量與次生孔產(chǎn)生量相等所對應(yīng)的深度點位于風(fēng)化殼之內(nèi)。
[Abstract]:In this paper, the Carboniferous volcanic rocks revealed by 5 drilling wells in Hashan area are taken as the research goal, and the core, cuttings, logging and logging data are used to understand the results of previous studies. The lithologic lithofacies types developed are summarized. The core, casting thin section observation, combined with the measured pore permeability, nuclear magnetic porosity, oil saturation and porosity data. The effective reservoir space types and their assemblages and evolution processes of volcanic rocks are summarized, and the dominant lithofacies types of volcanic reservoirs are identified. The main conclusions are as follows: 1, volcanic lithology. In the study area of lithofacies and effective reservoir space, there are 6 types and 25 species of igneous rocks, which are mainly basic, followed by neutral. The volcanic lithofacies are 4 facies 9 subfacies, mainly erupting facies and falling subfacies, followed by the lower subfacies of the ejection facies. There are 15 types of effective reservoir space type of volcanic rocks, 2 classes and 4 subclasses, and 8 types of pore and fracture assemblages, with secondary pore fractures as the main type. The dominant lithofacies of volcanic reservoir development consider both physical properties and oil saturation. The main lithologic types are Black Tortoise / Anshan / Anshan / amphitic / streamline / complex volcanic clastic rocks, followed by the lower subfacies of the ejection facies. The thermal clastic flow subfacies and the upper subfacies of the eruptive facies, while the volcanic channel facies and volcanic sedimentary facies have poor reservoir performance, and tend to form non-effective reservoir. 3, the influencing factors of reservoir space. The volcanic reservoir space is affected by lithology, lithofacies and diagenesis in the study area of evolution process and degree of development. Its development and evolution can be divided into three main stages and five sub-stages. The main types of effective reservoir space are secondary pore fractures. The most developed secondary pore fractures are interstitial dissolution pores and matrix dissolution pores. The results show that the dissolution can obviously improve the reservoir performance of volcanic rocks. The best reservoir capacity of the shallow Carboniferous volcanic reservoirs in the study area is related to the depth of weathering crust development in this area. Moreover, the depth corresponding to the same amount of primary pore retention and secondary pore production is located in the weathered crust.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：P618.13

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