提高西西伯利亚油田难采油田的开发效率

S.V. Arefiev
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引用次数: 0

摘要

为进一步提高难采油藏的开发和生产效率,提出了井监测方法。考虑了下白垩纪复合体形成的各种选择,例如苏尔古特和尼日涅瓦托夫斯克拱顶的油田。对西伯利亚西部一些油田的地质结构进行了详细研究,主要考虑了生产井,形成了侏罗纪和白垩纪矿床及其下部(Achimov组)的特点,包括考虑了先前形成的Bazhenov组异常部分的具体情况。根据构造和总厚度图的分析结果,确定了Bazhenov组和Achimov组异常段在矿床形成过程中存在强烈的构造运动。对油田Achimov地层厚度变化的分析表明,增加Achimov矿床的厚度对Bazhenov组及其异常剖面的总厚度进行了补偿,同时由于相邻块体沿同沉积断裂交替倾斜,正向构造逐渐变平。所有这些都使我们可以把阿奇莫夫地层看作是补偿性地层。给出了HTR油藏水平井流动剖面和组成动态标记监测的实例。论证了利用监测结果优化油田开发系统的可行性。实施该方法可以监测和优化生产井和注水井、油田开发系统的运行,并通过地质和技术措施(包括提高采收率和增产技术)提高采收率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
IMPROVING THE EFFICIENCY OF THE DEVELOPMENT OF OIL DEPOSITS WITH HARD-TO-RECOVER RESERVES IN THE FIELDS OF WESTERN SIBERIA
The article proposes well monitoring methods to further improve the efficiency of development and production of hard-to-recover oil reserves (HTR). Various options, on formation of the Lower Cretaceous complex, are considered for example of fields of the Surgut and Nizhnevartovsk vaults. As a result of a detailed study of the geological structure of a number of fields in Western Siberia, mainly considering production wells, the peculiarities of the Jurassic and Cretaceous deposits and their lower parts - the Achimov formation - were formulated, including considered specifics of the previously formed anomalous sections of the Bazhenov formation. Based on the results of the analysis, of structural and total thickness maps, the presence of intensive tectonic movements, during the formation of deposits of the anomalous section of the Bazhenov Formation and the Achimov Formation, was determined. The analysis of the Achimov strata thickness changes in the fields, indicated compensation of the total thicknesses of the Bazhenov Formation and its anomalous section by increasing the thickness of the Achimov deposits, as well as gradual flattening of positive structures as a result of alternate dipping of adjacent blocks along consedimentary faults. All this allows us to consider the Achimov strata as compensatory one. Examples are given on dynamic marker monitoring of flow profiles and composition for horizontal wells in reservoirs with HTR. The feasibility is shown to use monitoring results for optimizing of field development system. Implementation of the proposed approach makes it possible to monitor and optimize the operation of production and injection wells, the field development system, as well as to increase the oil recovery factor due to geological and technical measures, including enhanced oil recovery and oil production stimulation technologies.
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