杏树岗油田葡Ⅰ组油层强碱三元复合驱油层物性变化和剩余油分布规律
本文选题:强碱三元复合驱 + 岩心分析 ; 参考:《吉林大学》2015年硕士论文
【摘要】:杏树岗油田是大庆最早开展强碱三元复合驱现场试验及工业化推广的地区,但是,对于强碱三元复合驱后油层动用状况、储层物性变化情况、剩余油分布、油层结垢情况认识不够深入,需要系统的评价主力油层(葡Ⅰ组)强碱三元复合驱后油层物性变化和剩余油分布规律。 本文应用新老井测井资料,通过河流地层高分辨率精细对比、复合砂体解剖、平面微相精细分析、点坝砂体精细建模,实现全区精细统层及单砂体识别,准确、精细揭示平面微相、单砂体分布及点坝内部建筑结构。在动静态资料分析基础上,应用新钻井和强碱三元前后取心数据等更加清晰地认识油层的动用规律及强碱三元体系的驱油效率。借助激光共聚焦技术手段,分析强碱三元复合驱后储层微观剩余油分布特征及成因规律,结果表明强碱三元体系能够溶蚀储层中的矿物颗粒,并改变岩石润湿性,在矿物颗粒之间形成吸附状剩余油。利用电镜扫描和电子探针技术,观察强碱三元驱前后岩心物性变化,,强碱三元复合驱前后取心井显示储层的物性变差,粘土矿物增加,孔隙结构也相应发生变化,岩石的润湿性由亲水性向中性转变,同时岩心检测显示有硅垢存在。 此研究可加深剩余油形成机理的研究,进一步深化三元复合驱油机理的认识,填补国内外对于强碱三元复合驱引起储层物性包括孔、渗、流体、岩石润湿性方面研究的空白,能够进一步优化三元复合驱工业化推广的方案设计,为挖潜三元复合驱后剩余油提供理论依据,加快进一步提高采收率技术的发展,为大庆油田三次采油提供技术储备。
[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.
【学位授予单位】:吉林大学
【学位级别】:硕士
【学位授予年份】:2015
【分类号】:TE357.4
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