本文關鍵詞： 參數(shù)優(yōu)選 措施調(diào)整 聚合物驅(qū) 數(shù)值模擬　出處：《東北石油大學》2015年碩士論文　論文類型：學位論文

【摘要】：目前,化學驅(qū)是油田高含水后期主要挖潛技術,我國的化學驅(qū)油技術已經(jīng)走在世界前列,并在大慶、勝利等大油田得到顯著的效果。聚合物驅(qū)是化學驅(qū)的重要組成部分,水驅(qū)后進行聚合物驅(qū)能夠進一步提高采收率10%以上。聚合物驅(qū)能夠有效地增加水相粘度,改善驅(qū)替相與被驅(qū)替相流度比,擴大波及體積,提高洗油效率。油田開發(fā)到中后期后,含水上升較快,受儲層條件和開發(fā)條件的影響使得剩余油分布更為零散和復雜,如何準確地確定剩余油分布及有效地挖潛剩余油、得到更好的開發(fā)效果成為一項重要的課題。油田開發(fā)中的“三大矛盾”,即層內(nèi)矛盾、層間矛盾、平面矛盾日益突出,這些矛盾的出現(xiàn)加劇了剩余油挖潛的難度。因此有必要更好地制定開發(fā)方案,進一步提高石油的采收率。本文針對La8井區(qū)注聚參數(shù)優(yōu)化及開發(fā)調(diào)整開展研究,主要做了以下工作:首先,本文分析了La8井區(qū)當前的開采狀況,繪制了中心井區(qū)的產(chǎn)液量、產(chǎn)油量、含水率和注入量、注入聚合物濃度等綜合開采曲線;應用Petrel地質(zhì)建模軟件,建立了La8井區(qū)基于隨機建模方法的三維相控地質(zhì)模型,給出了模型的構造面和屬性分布狀況;在對地質(zhì)模型進行儲量擬合的基礎上應用Eclipse數(shù)值模擬軟件對La8井區(qū)進行了數(shù)值模擬研究,并進行了全區(qū)和單井的歷史擬合;其次,研究了目前聚驅(qū)濃度分布,給出了小層聚合物濃度分布圖和全區(qū)不同時間聚合物濃度分布圖,分析了目前聚驅(qū)開發(fā)效果;從平面及縱向兩個方面對剩余油分布進行分析;利用數(shù)值模擬方法,對聚合物驅(qū)的合理用量進行了研究,針對研究井區(qū)實際情況,優(yōu)化了注入聚合物分子量、注入濃度及注入速度;最后,對提高注采液量、壓裂(只對油井壓裂和油井及相應水井壓裂)及加密(不同加密時機、不同加密方式)等調(diào)整方案進行模擬預測,得到不同方案的開發(fā)效果,為進一步挖潛剩余油提供依據(jù)。
[Abstract]:At present, chemical flooding is the main technology of tapping potential in the late stage of high water cut of oil fields. The chemical flooding technology of our country has been in the forefront of the world, and has achieved remarkable results in Daqing and Shengli oil fields. Polymer flooding is an important part of chemical flooding. Polymer flooding after water flooding can further increase oil recovery by more than 10%. Polymer flooding can effectively increase viscosity of water phase, improve mobility ratio of displacement phase to displaced phase, enlarge sweep volume and improve oil washing efficiency. Due to the influence of reservoir conditions and development conditions, the distribution of remaining oil is more scattered and complex. How to determine the distribution of remaining oil accurately and effectively tap the remaining oil, Getting better development results has become an important issue. The "three contradictions" in oilfield development, namely, intra-layer contradiction, inter-layer contradiction, plane contradiction, are becoming increasingly prominent. These contradictions make it more difficult to tap the potential of the remaining oil. Therefore, it is necessary to make a better development plan and further improve the oil recovery. In this paper, the optimization of polymer injection parameters and development adjustment in La8 well area are studied. The main work is as follows: firstly, this paper analyzes the current production situation of La8 well area, draws the comprehensive production curves of the central well area, such as liquid production, oil production, water cut and injection rate, injection polymer concentration, etc., and applies Petrel geological modeling software. A 3D phase-controlled geological model based on stochastic modeling method in La8 well area is established, and the distribution of structure plane and attributes of the model is given. On the basis of the reserve fitting of the geological model, the Eclipse numerical simulation software is used to simulate the La8 well area, and the historical fitting of the whole area and the single well is carried out. Secondly, the concentration distribution of polymer flooding is studied. The distribution map of polymer concentration in small layer and the distribution map of polymer concentration at different time in the whole area are given, and the current development effect of polymer flooding is analyzed, the distribution of remaining oil is analyzed from two aspects of plane and longitude, and the numerical simulation method is used. The reasonable dosage of polymer flooding is studied, and the molecular weight, concentration and injection rate of polymer injection are optimized according to the actual conditions in the well area. Fracturing (only for oil well fracturing and oil well and corresponding well fracturing) and infilling (different infilling time, different infilling mode) and other adjustment schemes are simulated and forecasted, and the development effect of different schemes is obtained, which provides the basis for further tapping potential remaining oil.
【學位授予單位】：東北石油大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TE357.46

【參考文獻】

相關期刊論文 前1條

1 姜言里，，韓培慧，孫秀芝;聚合物驅(qū)油經(jīng)濟最佳用量的優(yōu)選[J];大慶石油地質(zhì)與開發(fā);1995年03期

本文編號：1497128