【摘要】：致密油指儲(chǔ)集在覆壓基質(zhì)滲透率小于0.2×10-3μm2的致密砂巖、致密碳酸鹽巖中的石油,東營(yíng)凹陷F154地區(qū)沙三段濁積巖儲(chǔ)層屬于致密砂巖儲(chǔ)層。F154地區(qū)沙三段濁積巖儲(chǔ)層具有埋藏深、砂泥巖薄互層出現(xiàn)、分布規(guī)律復(fù)雜等特點(diǎn)。本論文通過(guò)巖心取樣觀察、鑄體薄片分析、掃描電鏡觀察以及數(shù)字圖像定量分析等方法對(duì)東營(yíng)凹陷F154地區(qū)沙三段濁積巖儲(chǔ)層特征進(jìn)行了描述,總結(jié)了濁積巖儲(chǔ)層儲(chǔ)集空間的基本特征,分析了濁積巖儲(chǔ)層發(fā)育的控制因素,論文研究取得了以下認(rèn)識(shí)。(1)F154區(qū)塊沙三段濁積巖巖性以巖屑長(zhǎng)石砂巖和長(zhǎng)石巖屑砂巖為主。其成分成熟度低,巖屑和長(zhǎng)石含量高,石英含量低;雜基含量較高,膠結(jié)物以方解石和高嶺石為主;粒度以細(xì)砂為主,部分為粉砂、中砂,分選中等,磨圓度以次棱角狀為主,孔隙式膠結(jié),結(jié)構(gòu)成熟度較低。物性特征表明F154區(qū)塊沙三段濁積巖屬中低孔超低滲儲(chǔ)層。(2)利用鑄體薄片、掃描電鏡等方法研究了儲(chǔ)層儲(chǔ)集空間類型,研究區(qū)儲(chǔ)集空間類型包括粒間溶孔、巖屑粒內(nèi)溶孔、長(zhǎng)石粒內(nèi)溶孔、原生孔、鑄�？�、雜基孔和晶間孔,主要類型為粒間溶孔、巖屑粒內(nèi)溶孔和長(zhǎng)石粒內(nèi)溶孔。儲(chǔ)集空間定量分析表明儲(chǔ)集空間的孔徑分布為5~10um,不同儲(chǔ)集空間主要孔徑大小不同,粒間孔和粒內(nèi)溶孔的孔徑較大,雜基孔和晶間孔的孔徑較小,原生孔的孔徑分布差異較大。(3)濁積巖儲(chǔ)層的物性控制因素主要包括碎屑礦物組分、填隙物、巖石結(jié)構(gòu)、層厚以及成巖作用等,其中填隙物和層厚是控制研究區(qū)物性的主要因素,滲透率低的原因之一是由于相鄰泥質(zhì)層的鈣質(zhì)充填堵塞喉道造成的。
[Abstract]:Tight oil refers to the oil stored in tight sandstone with overpressure matrix permeability less than 0.2 脳 10-3 渭 m 2 and tight carbonate rock. The turbidite reservoir in the third member of Shahejie formation in Dongying Sag belongs to tight sandstone reservoir. The turbidite reservoir in the third member of Shahejie formation in F154 area has the characteristics of deep burial, thin interbedded sand-mudstone layer and complex distribution law. In this paper, the characteristics of turbidite reservoir in the third member of Shahejie formation in Dongying Sag are described by means of core sampling observation, casting slice analysis, scanning electron microscope observation and digital image quantitative analysis. The basic characteristics of reservoir space of turbidite reservoirs are summarized, and the controlling factors for the development of turbidite reservoirs are analyzed. The following knowledge is obtained in this paper. (1) the lithology of turbidite rocks in the third member of Shahejie formation of block F154 is dominated by lithic feldspathic sandstone and feldspar lithic sandstone. Its composition maturity is low, the content of cuttings and feldspar is high, the content of quartz is low, the content of hetero-base is higher, and the cements are mainly calcite and kaolinite. The grain size is mainly fine sand, the part is silty sand, the middle sand, the separation is medium, the grinding roundness is mainly in the form of sub-edge and corner, the pore-type cementation, and the structure maturity is low. The physical properties show that the turbidite in the third member of Shahejie formation in F154 block belongs to medium-low porosity and ultra-low permeability reservoir. (2) the reservoir space types are studied by means of casting slice, scanning electron microscope, etc. The reservoir space types in the study area include intergranular solution pore and cuttings intragranular solution pore, and the reservoir space type includes intergranular solution pore, cuttings intragranular solution pore, etc. The main types of feldspar are intergranular dissolved pore, cuttings intragranular lysing pore and feldspar intragranular dissolution pore, and the main types are intergranular dissolution pore, primary pore, casting mould pore, hetero-base pore and intergranular pore. The quantitative analysis of the reservoir space shows that the pore size distribution of the storage space is 5 脳 10 m, the main pore size of different storage space is different, the pore size of intergranular pore and intragranular dissolved pore is larger, and the pore size of hetero-basic pore and intergranular pore is smaller, and the pore size of intergranular pore and intergranular pore is smaller than that of intergranular pore. The pore size distribution of primary pores varies greatly. (3) the physical properties of turbidite reservoirs are mainly composed of clastic mineral composition, pore filling, rock structure, layer thickness and diagenesis, etc. The porosity and layer thickness are the main factors controlling the physical properties of the study area. One of the reasons for the low permeability is that the calcium filling in adjacent muddy layer blocks the throat.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：P618.13

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