本文選題：大孔道　切入點：主成分分析法　出處：《中國石油大學(xué)(華東)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：注水開發(fā)是控制油氣田產(chǎn)量的主要方式之一,但隨著注水開發(fā)的繼續(xù),由于儲層顆粒膠結(jié)疏松、非均質(zhì)性嚴(yán)重等地質(zhì)因素和高強度開采等開發(fā)因素的影響,儲層中極易形成大孔道。大孔道的發(fā)育會加劇儲層的非均質(zhì)性,使注入流體大量無效循環(huán),大大減小了注入流體的波及范圍,降低了其利用效率,從而使得開發(fā)效果變差,同時也增加了注水花費與處理成本。因此,加強對大孔道的識別與治理,有助于油田的高效合理開發(fā)。然而現(xiàn)有的大孔道識別方法存在考慮因素不全面等問題,為此,本文旨在綜合考慮油田開發(fā)過程中的地質(zhì)和開發(fā)等生產(chǎn)資料,建立一種大孔道的綜合識別方法,實現(xiàn)大孔道發(fā)育井組、大孔道發(fā)育方向和大孔道發(fā)育層位等的綜合識別。首先,以注采井組為研究對象,從地質(zhì)和開發(fā)動態(tài)資料出發(fā),篩選能夠反映大孔道形成前后動靜態(tài)響應(yīng)特征的指標(biāo)構(gòu)建評價指標(biāo)體系,進而利用主成分分析法計算井組評價指數(shù),并以此進行大孔道發(fā)育井組的定性識別,同時借助典型井的定量解釋結(jié)果,根據(jù)井組評價指數(shù)插值得到非典型井大孔道參數(shù)的定量結(jié)果,形成定性描述與定量解釋相結(jié)合的大孔道定量描述方法;在此基礎(chǔ)上,以注采井對為研究對象,篩選反映大孔道的響應(yīng)特征構(gòu)建評價序列,進而利用灰色關(guān)聯(lián)方法計算方向評價指數(shù),并根據(jù)其相對大小確定大孔道的發(fā)育方向;最后,以層為研究對象,篩選反映大孔道的響應(yīng)特征構(gòu)建評價體系,進而利用變異系數(shù)權(quán)重改進的模糊綜合評判方法計算層位評價指數(shù),并根據(jù)其相對大小確定大孔道的發(fā)育層位,從而形成一套較為完備的大孔道識別體系。通過上述方法的建立加強對儲層的認(rèn)識,為調(diào)剖堵水等大孔道治理措施的實施提供理論基礎(chǔ)與依據(jù),以此進一步提高注入水的波及系數(shù),從根本上改善油田水驅(qū)的開發(fā)效果。
[Abstract]:Water injection development is one of the main ways to control the production of oil and gas fields. However, with the development of water injection, geological factors such as loose cementation of reservoir particles, serious heterogeneity and exploitation factors such as high strength exploitation are affected by the development of water injection. It is easy to form large porosity in reservoir. The development of large pore channel will aggravate the heterogeneity of reservoir, make a large number of invalid circulation of injected fluid, greatly reduce the sweep area of injected fluid, reduce its utilization efficiency, and make the development effect become worse. At the same time, it also increases the cost of water injection and treatment. Therefore, strengthening the recognition and treatment of large pore channels is helpful to the efficient and rational development of oil fields. However, the existing methods for identifying large channels have some problems, such as incomplete considerations, and so on. The purpose of this paper is to synthetically consider the geological and production materials in the course of oilfield development, and to establish a comprehensive identification method of large channels, so as to realize the comprehensive identification of large pore development wells, the direction of development of large channels and the developmental horizon of large channels. Taking the injection-production well group as the research object, starting from the geological and development dynamic data, the evaluation index system is constructed by screening the indexes which can reflect the dynamic and static response characteristics before and after the formation of the large pore channel, and then the evaluation index of the well group is calculated by principal component analysis. With the help of the quantitative interpretation results of typical wells, the quantitative results of large channel parameters of atypical wells are obtained according to the interpolation of well group evaluation index. On the basis of this, the injection-production well pair is taken as the research object, and the response characteristics reflecting the large channel are selected to construct the evaluation sequence. Then the direction evaluation index is calculated by using the grey correlation method, and the development direction of the large channel is determined according to its relative size. Finally, taking the layer as the research object, the evaluation system is constructed by screening the response characteristics of the large channel. Furthermore, the interval evaluation index is calculated by using the fuzzy comprehensive evaluation method, which is improved by the weight of coefficient of variation, and the developmental horizon of the large pore channel is determined according to its relative size. Through the establishment of the above methods, we can strengthen the understanding of the reservoir, and provide the theoretical basis and basis for the implementation of the treatment measures such as profile control and water plugging. In this way, the sweep efficiency of injected water can be further improved, and the development effect of oilfield water drive will be improved fundamentally.
【學(xué)位授予單位】：中國石油大學(xué)(華東)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TE357.6

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本文編號：1566796