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Impact of carbon dioxide on Ivanic oilfield in tertiary oil recovery phase

机译：三次采油阶段二氧化碳对伊凡尼油田的影响

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Current annual oil production in Croatia on more than 30 oilfields, amounts to a little more than 0.5 million t per year. In the last 50 years, the realized oil recovery factor from the oil reservoirs has on average amounted to 32.6% of original oil in place. The currently favourable oil price increases the need for higher oil recovery from existing oilfields through the implementation of tertiary oil recovery methods. As for Croatia, a 3% increase in the oil recovery factor from current oil reservoirs, obtained due to the implementation of tertiary oil recovery methods, increases annual oil production by 15 0001. Although tertiary oil recovery methods (EOR methods) are becoming more common worldwide, carbon dioxide injection in oil reservoirs is the most implemented EOR method. Based on the laboratory test results of the applications of tertiary oil recovery methods on oil reservoirs in Croatia, the carbon dioxide injection process was chosen as an appropriate method for increasing oil production on the Ivanic oil field.rnDuring the injection stage, carbon dioxide changes the state of the matter from liquid to gaseous or supercritical state. Unfortunately, the measured carbon dioxide injection results and laboratory test results differ. In situ measurements are very expensive and sometimes impractical; therefore, various approximations are taken into account with numerous equations of state. The aim was to approximate an equation of state on the measured data, for a wide range of p, T conditions, during a pilot project of carbon dioxide injection on the Ivanic oilfield reservoir. Among numerous cubic equations of state, van der Waals, Redlich-Kwong, Soave-Redlich-Kwong, Peng-Robinson, Valderrama-Cisternas, Patel-Teja, Lawal-Lake-Silberberg and Matin and Hou equation of state. After comprehensive comparisons and analysis of the values measured and calculated for a wide range of p,T conditions during carbon dioxide injection on the Ivanic oilfield, some of equations of state were recommended for determinations carbon dioxide changes of state.
机译：克罗地亚目前在30多个油田上的年石油产量达到每年50万吨以上。在过去的50年中，从储油库中实现的采油率平均已达到原始储油量的32.6％。当前有利的石油价格增加了通过实施三次采油方法从现有油田中进行更高采收率的需求。至于克罗地亚，由于实施了三次采油方法，使得当前储油库的采油率提高了3％，使每年的石油产量增加了150001。尽管三次采油方法（EOR方法）变得越来越普遍在世界范围内，向储油层注入二氧化碳是最有效的EOR方法。根据三次采油方法在克罗地亚储油库中应用的实验室测试结果，选择了二氧化碳注入工艺作为增加伊凡尼油田采油量的适当方法。物质从液态到气态或超临界状态。不幸的是，测量的二氧化碳注入结果和实验室测试结果不同。原位测量非常昂贵，有时不切实际。因此，许多状态方程考虑了各种近似。目的是在Ivanic油田储层注入二氧化碳的试点项目期间，在较大的p，T条件下，根据测量数据近似状态方程。在众多的立方状态方程中，范德华，雷德利希·w旺，索阿夫·雷德利希·，旺，彭·罗宾逊，瓦尔德拉玛－西德纳斯，帕特尔·泰亚，拉瓦尔·莱克·希尔伯贝格和马汀和侯的状态方程。在对Ivanic油田注入二氧化碳期间在很宽的p，T条件下测量和计算的值进行全面比较和分析之后，建议使用一些状态方程来确定二氧化碳的状态变化。

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