本文選題：氣水識別　切入點：疊前彈性參數(shù)反演　出處：《成都理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：SLG地區(qū)是我國內(nèi)陸的主要氣田,是典型的圈閉性氣藏。其主力產(chǎn)層盒8段具有“低孔、低滲、低豐度”的特征,且局部氣藏規(guī)模小。產(chǎn)層盒8段砂體延展能力有限,有效砂體連通性不強,儲層極具非均質(zhì)性,并且無統(tǒng)一的氣水界面,氣水關(guān)系相當復(fù)雜。針對SLG地區(qū)這種復(fù)雜氣水關(guān)系的情況,本文首先分析了目前常用的多種氣水識別方法的方法理論,然后結(jié)合研究區(qū)的測井及地震、地質(zhì)等資料,研制一套適用于研究區(qū)的氣水識別技術(shù)系列。論文主要取得以下三項關(guān)鍵研究成果:(1)研制了一套適用于SLG地區(qū)的氣水識別技術(shù)系列,該技術(shù)系列從六個方面對常規(guī)方法進行了改進:①采用先層拉平后保邊去噪的特色去噪手段,以提高資料的信噪比和分辨率并較好的保留邊緣信息,為后期反演打好基礎(chǔ);②采用高精度的橫波速度預(yù)測方法彌補工區(qū)僅2口井有橫波數(shù)據(jù)的不足;③采用更適合于非勻質(zhì)性強地區(qū)的擴展彈性阻抗反演方法反演疊前彈性參數(shù)信息;④以反演的工區(qū)疊前彈性參數(shù)為基礎(chǔ)優(yōu)選氣水識別因子;⑤疊后反演采用隨機反演與測井參數(shù)擬合的反演方法;⑥綜合利用疊前及疊后參數(shù)聯(lián)合進行氣水識別分析,降低了參數(shù)多解性的影響,使氣水識別更加精準。(2)利用該技術(shù)進行SLG地區(qū)氣水分布規(guī)律研究,得出了該研究區(qū)的氣水分布特征——含氣普遍但分散性強、局部氣富集區(qū)較少、氣水同產(chǎn)區(qū)域較多等。(3)部署了一口具有較高開發(fā)潛力的建議井。該井位于構(gòu)造較高位置,砂體和儲層發(fā)育良好,表現(xiàn)為氣富集特征,因此具有很高的勘探和開發(fā)價值。實際資料的結(jié)果表明,本文提出的氣水識別技術(shù)系列在SLG地區(qū)應(yīng)用效果良好,為該地區(qū)的氣水識別提供了很好的技術(shù)支持,具有重要的理論和實際應(yīng)用及推廣價值。
[Abstract]:The SLG area is the main gas field in the inland of China, which is a typical trap gas reservoir. The main production layer is characterized by "low porosity, low permeability and low abundance", and the local gas reservoir is small in scale. The connectivity of effective sand body is not strong, the reservoir is extremely heterogeneous, and there is no uniform gas-water interface, the gas-water relationship is quite complex. In this paper, we first analyze the methods and theories of gas and water identification in common use, and then combine well logging and seismic, geological and other data in the study area. A series of gas-water identification techniques suitable for the study area has been developed. In this paper, the following three key research achievements have been obtained: (1) A set of gas-water identification technology series suitable for SLG area has been developed. This series of techniques has improved the conventional method from six aspects. In order to improve the signal-to-noise ratio (SNR) and resolution of the data and preserve the edge information, the special de-noising method is adopted in the first layer leveling and then edge preserving. In order to lay a good foundation for the later inversion, the high precision prediction method of shear wave velocity is adopted to make up for the shortage of shear wave data in only 2 wells in the working area. 3. The extended elastic impedance inversion method is used to inverse prestack projectile which is more suitable for the area with strong inhomogeneity. Based on the prestack elastic parameters of the inversion area, the poststack inversion method of random inversion and log parameter fitting is used to analyze the gas and water identification by combining prestack and poststack parameters. It reduces the influence of parameter multi-solvability and makes gas-water identification more accurate. 2) using this technology to study the gas-water distribution law in SLG area, it is concluded that the gas-water distribution characteristic of this research area is that the gas-water distribution is universal but dispersive, and the local gas-rich area is less. A suggested well with high potential for development has been deployed. The well is located in a relatively high structural position, and the sand body and reservoir are well developed, showing the characteristics of gas enrichment. The results of the actual data show that the series of gas-water identification techniques proposed in this paper have a good application effect in the SLG area and provide a good technical support for the gas-water identification in this area. It has important theoretical and practical application and popularization value.
【學(xué)位授予單位】：成都理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P631.4;P618.13

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本文編號：1643320