發(fā)布時(shí)間：2018-03-23 19:46

  本文選題：姬塬油田　切入點(diǎn)：儲(chǔ)層特征　出處：《西安石油大學(xué)》2015年碩士論文

【摘要】：姬塬地區(qū)位于寧夏鹽池縣境內(nèi),東臨馬坊油田,西抵紅井子油田。主力含油層為三疊系延長(zhǎng)組和侏羅系延安組。姬塬地區(qū)是低滲透砂巖油藏的典型代表,儲(chǔ)層物性差、非均質(zhì)性強(qiáng)、孔隙結(jié)構(gòu)和油水關(guān)系復(fù)雜。儲(chǔ)層成巖作用、孔隙結(jié)構(gòu)的差異嚴(yán)重影響了利用測(cè)井資料準(zhǔn)確識(shí)別和評(píng)價(jià)油層的能力。本文以鄂爾多斯盆地姬塬地區(qū)延長(zhǎng)組長(zhǎng)9油層組為研究對(duì)象,從低滲透復(fù)雜孔隙結(jié)構(gòu)、儲(chǔ)層巖電特征、測(cè)井解釋模型研究、低滲儲(chǔ)層測(cè)井快速識(shí)別等方面進(jìn)行研究。姬塬油田H219區(qū)長(zhǎng)9油層組的沉積體系屬于三角洲平原沉積環(huán)境,主要微相類型為分流河道、分流間灣、河道側(cè)翼;巖石類型以巖屑長(zhǎng)石砂巖、長(zhǎng)石砂巖為主,長(zhǎng)石和石英含量較高,碎屑含量低,且以變質(zhì)巖屑為主;長(zhǎng)9儲(chǔ)層平均孔隙度為12.92%,平均滲透率為1.91×10-3μm2,儲(chǔ)層物性較差,表現(xiàn)為低孔、低滲的特征。姬塬油田H219區(qū)長(zhǎng)9儲(chǔ)層孔隙類型以粒間孔為主,其次發(fā)育長(zhǎng)石溶孔,其他孔隙類型相對(duì)較少�？紫督Y(jié)構(gòu)參數(shù)排驅(qū)壓力平均為0.23Mpa,中值壓力為4.36MPa,中值喉道半徑為0.17μm,儲(chǔ)層微小孔隙發(fā)育,孔隙結(jié)構(gòu)一般�？刂苾�(chǔ)層發(fā)育的主要因素是成巖作用,研究區(qū)成巖作用強(qiáng)烈,類型復(fù)雜,壓實(shí)作用對(duì)原生孔隙起著主要的破壞作用,同時(shí)發(fā)育膠結(jié)作用;溶解溶蝕作用對(duì)砂巖次生孔隙形成起主要作用,對(duì)改善本區(qū)儲(chǔ)層物性起著非常重要的作用。H219區(qū)儲(chǔ)層非均質(zhì)性研究主要從層內(nèi)、層間以及平面三個(gè)角度開(kāi)展儲(chǔ)層非均質(zhì)性分析。研究區(qū)長(zhǎng)9儲(chǔ)層變異系數(shù)為中等,突進(jìn)系數(shù)為弱,極差系數(shù)為中等。整個(gè)長(zhǎng)9連續(xù)疊置狀產(chǎn)出的中厚層砂巖組合,層間非均質(zhì)性中等至較弱。儲(chǔ)層參數(shù)精細(xì)解釋模型和儲(chǔ)層物性下限的基礎(chǔ)上,建立了儲(chǔ)層參數(shù)限定值法、侵入特征分析法、聲波時(shí)差與電阻率重疊圖法、巖性—電性交會(huì)圖法、微分分析法和橫向?qū)Ρ确ǖ榷喾N油水層定量和定性綜合判識(shí)技術(shù),以提高解釋符合率。
[Abstract]:The Jiyuan area is located in Yanchi County, Ningxia, adjacent to Mafang Oilfield in the east and Hongjingzi Oilfield in the west. The main oil bearing layers are the Yanchang formation of Triassic and the Yanan formation of Jurassic. Jiyuan area is a typical low permeability sandstone reservoir with poor physical properties. Strong heterogeneity, complex pore structure and oil-water relationship. Reservoir diagenesis, The difference of pore structure has seriously affected the ability to accurately identify and evaluate oil layers using logging data. This paper takes Yanchang formation 9 in Jiyuan area, Ordos Basin, as the research object, from the complex pore structure of low permeability and the petro-electric characteristics of reservoir. The sedimentary system of Chang 9 formation in H219 area of Jiyuan Oilfield belongs to delta plain sedimentary environment, and the main microfacies types are distributary channel, interdistributary bay and flanking channel. The main rock types are lithic feldspathic sandstone, feldspathic sandstone, high feldspar and quartz content, low clastic content, and metamorphic rock debris, the average porosity and permeability of Chang9 reservoir are 12.92 and 1.91 脳 10 ~ (-3) 渭 m ~ (2) respectively. The pore types of Chang 9 reservoir in area H219 of Jiyuan Oilfield are mainly intergranular pores, followed by feldspar dissolution pores. Other pore types are relatively few. The average displacement pressure of pore structure parameter is 0.23 Mpa. the median pressure is 4.36 MPA, the median throat radius is 0.17 渭 m. In the study area, the diagenesis is strong, the type is complex, the compaction plays a major role in the destruction of primary pores, and the cementation is also developed, while dissolution and dissolution play a major role in the formation of secondary pores in sandstone. The study of reservoir heterogeneity in H219 area is mainly carried out from three angles of layer, interlayer and plane. The coefficient of variation of Chang 9 reservoir is medium, the coefficient of penetration is weak, and the reservoir heterogeneity is very important to improve the reservoir physical properties in this area. The range coefficient is medium. The medium thickness sandstone assemblage of the whole Chang 9 continuous superposition, the medium to weak heterogeneity between layers, the fine interpretation model of reservoir parameters and the lower limit of reservoir physical properties, are established, and the limited value method of reservoir parameters is established. In order to improve the interpretation coincidence rate of oil and water layers the intrusion characteristic analysis method the overlap map method of acoustic moveout and resistivity the litho-electric intercourse map method the differential analysis method and the lateral contrast method are used to identify the oil and water layers quantitatively and qualitatively.
【學(xué)位授予單位】：西安石油大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：P618.13;P631.81

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