杏樹崗油田葡Ⅰ組油層強堿三元復合驅油層物性變化和剩余油分布規(guī)律
本文選題:強堿三元復合驅 + 巖心分析; 參考:《吉林大學》2015年碩士論文
【摘要】:杏樹崗油田是大慶最早開展強堿三元復合驅現(xiàn)場試驗及工業(yè)化推廣的地區(qū),但是,對于強堿三元復合驅后油層動用狀況、儲層物性變化情況、剩余油分布、油層結垢情況認識不夠深入,需要系統(tǒng)的評價主力油層(葡Ⅰ組)強堿三元復合驅后油層物性變化和剩余油分布規(guī)律。 本文應用新老井測井資料,通過河流地層高分辨率精細對比、復合砂體解剖、平面微相精細分析、點壩砂體精細建模,實現(xiàn)全區(qū)精細統(tǒng)層及單砂體識別,準確、精細揭示平面微相、單砂體分布及點壩內部建筑結構。在動靜態(tài)資料分析基礎上,應用新鉆井和強堿三元前后取心數(shù)據(jù)等更加清晰地認識油層的動用規(guī)律及強堿三元體系的驅油效率。借助激光共聚焦技術手段,分析強堿三元復合驅后儲層微觀剩余油分布特征及成因規(guī)律,結果表明強堿三元體系能夠溶蝕儲層中的礦物顆粒,并改變巖石潤濕性,在礦物顆粒之間形成吸附狀剩余油。利用電鏡掃描和電子探針技術,觀察強堿三元驅前后巖心物性變化,,強堿三元復合驅前后取心井顯示儲層的物性變差,粘土礦物增加,孔隙結構也相應發(fā)生變化,巖石的潤濕性由親水性向中性轉變,同時巖心檢測顯示有硅垢存在。 此研究可加深剩余油形成機理的研究,進一步深化三元復合驅油機理的認識,填補國內外對于強堿三元復合驅引起儲層物性包括孔、滲、流體、巖石潤濕性方面研究的空白,能夠進一步優(yōu)化三元復合驅工業(yè)化推廣的方案設計,為挖潛三元復合驅后剩余油提供理論依據(jù),加快進一步提高采收率技術的發(fā)展,為大慶油田三次采油提供技術儲備。
[Abstract]:Xingshugang Oilfield is the first area in Daqing to carry out field test and industrialization promotion of strong alkali ASP flooding. However, for reservoir production status, reservoir physical property change and residual oil distribution after strong alkali ASP flooding, The understanding of scale formation is not deep enough, so it is necessary to systematically evaluate the variation of reservoir physical properties and the distribution of remaining oil after the ASP flooding of the main reservoir (Group I). In this paper, through high-resolution fine correlation of fluvial strata, anatomy of composite sand bodies, fine analysis of planar microfacies and fine modeling of point-bar sand bodies, the fine strata and single sand bodies in the whole area can be identified accurately by using the new and old well logging data. The plane microfacies, the distribution of single sand body and the interior structure of point dam are revealed in detail. On the basis of dynamic and static data analysis, new drilling and coring data before and after strong alkali ternary system are used to understand more clearly the production law of reservoir and the displacement efficiency of strong alkali ternary system. By means of laser confocal technique, the microcosmic residual oil distribution characteristics and genesis of reservoir after strong alkali ternary flooding are analyzed. The results show that the strong alkali ternary system can dissolve the mineral particles in the reservoir and change the wettability of rock. Adsorptive residual oil is formed between mineral particles. By means of electron microscope scanning and electron probe technique, the changes of core physical properties before and after strong alkali ternary flooding are observed. The coring wells before and after strong alkali ternary flooding show that the physical properties of reservoir become worse, the clay minerals increase, and the pore structure changes accordingly. The wettability of rock changed from hydrophilic to neutral, and the core detection showed the presence of silicon scale. This study can deepen the research on the formation mechanism of residual oil, deepen the understanding of the mechanism of ASP flooding, and fill the blank in the study of reservoir physical properties including pore, permeability, fluid and rock wettability caused by strong alkali ASP flooding at home and abroad. It can further optimize the scheme design of industrialization extension of ASP flooding, provide the theoretical basis for exploiting the potential of remaining oil after ASP flooding, speed up the further development of oil recovery technology, and provide technical reserve for tertiary oil recovery in Daqing Oilfield.
【學位授予單位】:吉林大學
【學位級別】:碩士
【學位授予年份】:2015
【分類號】:TE357.4
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