本文選題：東河砂巖 + 巖石物理相�。� 參考：《中國石油大學(xué)(北京)》2016年博士論文

【摘要】：東河1油田石炭系濱岸相東河砂巖碎屑巖油藏是國內(nèi)首例海相整裝塊狀底水油藏,然而針對其儲層特征的研究缺乏完整性,非均質(zhì)性主控因素、成因機(jī)理認(rèn)識存在不足,而基于常規(guī)滲透率模型的非均質(zhì)性表征方法又無法真實地反映儲層特征的井間差異變化。因此,本論文從沉積、成巖和構(gòu)造分析入手,重新厘定了不同類型儲層的主控因素,確定了微觀儲集空間的成因機(jī)理,并結(jié)合巖石物理研究,將巖心、測井、地震資料綜合應(yīng)用于不同類型儲層巖石物理表征中,以期達(dá)到指導(dǎo)油田開發(fā)調(diào)整的目的。東河砂巖儲層為三角洲背景下的濱岸沉積,根據(jù)沉積環(huán)境的差異將濱岸相儲層劃分為12種具有不同成因類型的微相;通過薄片分析發(fā)現(xiàn)東河砂巖儲層主要發(fā)育壓實、膠結(jié)、交代和溶蝕4大類成巖作用,經(jīng)歷了同沉積、早期壓實、表生成巖、早成巖和中成巖5個階段,目前主體處于中成巖階段A期,主要發(fā)育6種不同的成巖相類型。綜合沉積相和成巖相的研究成果認(rèn)為:河道改造型壩、河口壩改造型壩和粘土環(huán)邊膠結(jié)成巖相疊合區(qū)的儲層物性最好,儲層內(nèi)部孔喉連通性好,非均質(zhì)性弱。通過沉積相、成巖相主控要素的疊加,將東河砂巖儲層劃分為8大類巖石物理相,其中PF2類巖石物理相宏觀物性最好,微觀孔喉連通性好。東河砂巖儲層特征分析表明,其巖石基質(zhì)主要由石英、長石、巖屑和填隙物組成,孔隙類型主要為剩余原生粒間孔、次生粒間溶孔和粒內(nèi)溶孔,孔隙流體為油、水兩相,據(jù)此建立了東河砂巖儲層的巖石物理模型,并通過巖石物理理論公式的推導(dǎo),確定了微觀儲層特征和宏觀巖石彈性模量之間的定量關(guān)系。在此基礎(chǔ)上,基于東河砂巖巖石物理模型進(jìn)行了橫波預(yù)測,并通過與其他不同預(yù)測方法的類比,發(fā)現(xiàn)其具有更高的表征精度。通過沉積相、成巖相的疊合分析,并考慮不同尺度資料的統(tǒng)一,最終確定了巖心、測井、地震尺度3大類巖石物理相的劃分方案;不同巖石物理相類型的儲層具有不同的測井響應(yīng)和地震AVO特征,據(jù)此,通過巖石物理分析,確定了基于不同尺度資料巖石物理相定量參數(shù)的表征方法,且避免了干巖模量的求解,并以此定量參數(shù)為約束重建了滲透率模型,實現(xiàn)了非均質(zhì)性的高精度表征;最后,利用疊前地震資料進(jìn)行了基于巖石物理分析的巖石物理相參數(shù)、孔隙度和滲透率反演,并結(jié)合靜態(tài)地質(zhì)分析結(jié)果,對潛在優(yōu)勢通道進(jìn)行了預(yù)測。
[Abstract]:Carboniferous shoreline Donghe sandstone clastic rock reservoir in Donghe 1 oilfield is the first case of marine integrated bulk bottom water reservoir in China. However, the study on its reservoir characteristics lacks integrity, heterogeneity dominating factors, and insufficient understanding of genetic mechanism. However, the heterogeneity representation method based on the conventional permeability model can not truly reflect the cross-well variation of reservoir characteristics. Therefore, starting with the analysis of deposition, diagenesis and structure, this paper redefined the main controlling factors of different types of reservoirs, determined the genetic mechanism of microreservoir space, and combined with the study of rock physics, the core, logging, The seismic data are comprehensively applied to the petrophysical characterization of different types of reservoirs in order to guide the development and adjustment of oil fields. Donghe sandstone reservoir is a shoreline deposit in the delta background, which is divided into 12 microfacies with different genetic types according to the difference of sedimentary environment, and it is found that the Donghe sandstone reservoir is mainly compacted and cemented by thin slice analysis. Four types of diagenesis, metasomatism and dissolution, have undergone five stages: synsedimentary, early compaction, epigenetic rock, early diagenesis and middle diagenesis. At present, the main body is in stage A of middle diagenesis, and six types of diagenetic facies are mainly developed. The research results of sedimentary facies and diagenetic facies show that the reservoir physical properties are the best, the porosity and throat connectivity are good, and the heterogeneity is weak in the combination area of sedimentary facies and diagenetic facies. Through the superposition of sedimentary facies and diagenetic facies, Donghe sandstone reservoir can be divided into 8 types of petrophysical facies, in which PF2 type rock physical facies is the best in macroscopic physical properties and microcosmic pore throat connectivity is good. The analysis of the reservoir characteristics of Donghe sandstone shows that the rock matrix is mainly composed of quartz, feldspar, lithic debris and interstitial matter. The pore types are mainly residual primary intergranular pore, secondary intergranular dissolved pore and intragranular dissolved pore, and the pore fluid is oil and water. Based on this, the rock physical model of Donghe sandstone reservoir is established, and the quantitative relationship between microscopic reservoir characteristics and macroscopic rock elastic modulus is determined by deducing the theoretical formula of rock physics. On this basis, the S-wave prediction is carried out based on the Donghe sandstone petrophysical model and compared with other prediction methods, it is found that it has higher characterization accuracy. Through the superposition analysis of sedimentary facies and diagenetic facies and considering the unification of data of different scales, the classification scheme of rock physical facies of core, logging and seismic scale is finally determined. The reservoir with different petrophysical facies types has different logging response and seismic AVO characteristics. Based on the analysis of rock physics, the quantitative parameters of rock physical facies based on different scales are determined. The calculation of dry rock modulus is avoided, and the permeability model is reconstructed with quantitative parameters as constraints, which realizes the high accuracy characterization of heterogeneity. Finally, the rock physical phase parameters based on rock physical analysis are carried out by using prestack seismic data. Porosity and permeability inversion are combined with static geological analysis to predict the potential dominant channels.
【學(xué)位授予單位】：中國石油大學(xué)(北京)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：P618.13
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本文編號：1840659