本文關(guān)鍵詞： 致密儲層 致密機(jī)理 成巖作用 蘆草溝組 馬朗-條湖凹陷 三塘湖盆地　出處：《東北石油大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：為了研究三塘湖盆地馬朗-條湖凹陷蘆草溝組的油氣聚集規(guī)律,并為下一步優(yōu)選勘探目標(biāo)提供科學(xué)的依據(jù),本文在研究蘆草溝組致密儲層微觀特征的基礎(chǔ)上,同時(shí)考慮成巖作用和成巖階段對儲層物性的影響,探討了儲層的致密機(jī)理。研究結(jié)果表明,蘆草溝組致密儲層粒度較細(xì),分選性差,泥質(zhì)、雜基含量高,孔隙結(jié)構(gòu)具有納米孔、特低滲、納米喉、不均勻型的特征。成巖作用對儲層物性具有明顯的控制作用,早成巖階段的儲層滲透率較好,從高滲到超低滲均有;中成巖階段儲層的滲透率較差,非滲儲層(滲透率0.1mD)激增;在中成巖階段A1亞期,還發(fā)育特低滲的常規(guī)儲層(滲透率≥1mD),但在中成巖階段A21-A22微期,絕大多數(shù)為滲透率0.1mD的非常規(guī)儲層。蘆草溝組致密儲層中沉積物的特征具有沉積型致密儲層的特征,但孔隙類型以次生孔為主,也符合成巖型致密儲層的特征。因此,蘆草溝組致密儲層的致密原因?qū)儆诨旌铣梢?但以沉積成因?yàn)橹鳌?br/>[Abstract]:In order to study the oil and gas accumulation law of Lucaogou formation in Marang-Tiaohu depression of Santanghu Basin and to provide scientific basis for the next optimal exploration target, this paper studies the microscopic characteristics of dense reservoir in Lucaogou formation. Considering the influence of diagenesis and diagenesis on reservoir physical properties, the mechanism of reservoir densification is discussed. The results show that the tight reservoir of Luchaogou formation has fine granularity, poor sorting, muddy and high heterogeneity content. The pore structure has the characteristics of nano-pore, ultra-low permeability, nano-larynx and heterogeneity. Diagenesis has obvious controlling effect on reservoir physical properties, and the reservoir permeability in early diagenesis stage is better, from high permeability to ultra-low permeability. In the middle diagenetic stage, the permeability of the reservoir is poor, and the permeability of the non-permeable reservoir (permeability 0.1mD) increases rapidly. During the A1 substage of the middle diagenetic stage, conventional reservoirs with extremely low permeability (permeability 鈮，

本文編號：1479724