【摘要】：由于石油需求的與日俱增,構(gòu)造圈閉勘探程度和深入程度不足,隱性油氣藏的勘探變得越來越重要。因此,提高油氣的勘探開發(fā)能力具有非常重要的意義。疊前縱橫波聯(lián)合彈性反演,從含有豐富地質(zhì)信息的疊前資料入手,由疊前道集中獲取地層縱橫波速度、密度等參數(shù),然后利用不同角度的角道集數(shù)據(jù)得到彈性波阻抗數(shù)據(jù)體,將為研究儲層的變化規(guī)律提供新的手段。首先,本文簡要介紹地震反演的基本原理及分類,針對遞推反演、地質(zhì)統(tǒng)計學(xué)反演、測井約束反演及AVO反演進行優(yōu)缺點及基本流程的分析,并描述了疊前縱橫波聯(lián)合彈性反演的基本思想及其優(yōu)勢。為后續(xù)的應(yīng)用研究提供了扎實的理論基礎(chǔ)。然后,在理論的基礎(chǔ)上,對實際工區(qū)進行反演,研究工區(qū)的目的層段為沙河子組,首先是測井曲線的預(yù)處理,主要分為以下幾個步驟:測井?dāng)?shù)據(jù)分析、井徑垮塌環(huán)境校正、直方圖法完成測井曲線區(qū)域標(biāo)準(zhǔn)化、聚類分析法實現(xiàn)橫波曲線重構(gòu)、儲層敏感性參數(shù)分析。在進行儲層敏感性參數(shù)分析的過程中,先對四級層序進行彈性參數(shù)及常規(guī)測井曲線整體分析,優(yōu)選出較為敏感的參數(shù),然后再對五級層序進行更精細的分層段交匯分析。通過這一步驟,可以對儲層進行更精細的描述。其次是疊前彈性反演技術(shù)研究,可以分為:疊前數(shù)據(jù)部分疊加、精細井震標(biāo)定、多種彈性屬性信息約束、軟趨勢約束、疊前彈性反演效果分析等幾個步驟,疊前彈性反演的重點部分為各種彈性參數(shù)體的求取,從而獲得巖性解釋與單砂體刻畫。最后,在確定單砂體的過程中,利用儲層的“甜點”屬性進行識別,檢查彈性縱橫波速比的屬性,刻畫出五級層序單砂體,通過體透視的方法,發(fā)現(xiàn)規(guī)模較大的單砂體。通過縱橫波速比剖面分析,確定建議的水平井井位。
[Abstract]:Due to the increasing demand for oil and insufficient exploration and depth of structural traps, the exploration of hidden reservoirs becomes more and more important. Therefore, it is of great significance to improve the exploration and development ability of oil and gas. Prestack P-S wave combined with elastic inversion, starting with prestack data with abundant geological information, obtains the velocity and density of P-S wave from prestack channel concentration, and then obtains elastic wave impedance data by using angle gather data of different angles. It will provide a new method for studying the change law of reservoir. Firstly, this paper briefly introduces the basic principle and classification of seismic inversion, and analyzes the advantages and disadvantages of recursive inversion, geostatistical inversion, logging constrained inversion and AVO inversion. The basic idea and advantages of prestack P-S wave combined elastic inversion are described. It provides a solid theoretical basis for further applied research. Then, on the basis of theory, the actual working area is inversed. The target section of the work area is Shahezi formation. The first is the pretreatment of logging curve, which is mainly divided into the following steps: log data analysis, well diameter collapse environment correction, Histogram method is used to standardize the area of logging curve, cluster analysis is used to reconstruct shear wave curve, and reservoir sensitivity parameter is analyzed. In the process of reservoir sensitivity parameter analysis, the elastic parameters and conventional logging curves of the four-order sequence are analyzed as a whole, and the more sensitive parameters are selected, and then the five-level sequence is analyzed with more fine stratification intersection analysis. Through this step, the reservoir can be described in more detail. Secondly, the research of prestack elastic inversion technology can be divided into: prestack data partial stack, fine well seismic calibration, multiple elastic attribute information constraints, soft trend constraints, pre-stack elastic inversion effect analysis, etc. The key part of prestack elastic inversion is to obtain various elastic parameter bodies, thus lithologic interpretation and single sand body characterization are obtained. Finally, in the process of determining the single sand body, we use the "dessert" attribute of the reservoir to identify, check the property of elastic longitudinal and transverse wave velocity ratio, and depict the five-grade sequence single sand body. Through the method of body perspective, we find the large single sand body. Through the profile analysis of longitudinal and transverse wave velocity ratio, the suggested horizontal well location is determined.
【學(xué)位授予單位】：東北石油大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.4

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本文編號：2418919