尕斯库勒N1-N21油藏剩余油分布规律研究

Research on Remaining Oil Distribution of Gasikule N_1-N_2~1 Oilfield

尕斯库勒油田N1-N21油藏为一非均质性较强的构造——岩性油气藏,从油藏构造特征、沉积特征和注水开发现状等方面分析入手,采用数值模拟方法研究了该油藏剩余油分布规律。研究表明,受构造和岩性因素控制,平面上剩余油主要分布在油藏构造高部位、断层、岩性尖灭、井网控程度低和注采系统不完善的地区。纵向上剩余油主要集中在油层的中上部和物性较差的层段。综合来说,油层沉积非均质性、构造非均质性和注采井网的完善程度是控制剩余油分布的主要因素。

Gasikule N1-N12 Reservoir is a heterogeneity structure-lithologic reservoir.This paper researches the remaining oil distribution by analyzing the structural features,sedimentary characteristics,status of water injection and other aspects,the method of numerical simulation is used and combined with reservoir engineering.The results show that controlled by the structure and lithology,the plane remaining oil is distributed mainly in the region of structural high location,fault,lithology pinch,low degree of well-control and imperfect flooding well system.Vertical residual oil is distributed mainly in the upper reservoir,and poor physical layers.In summary,the sedimentary heterogeneity,structural heterogeneity and the perfection degree of flooding well network are the main factors to control the distribution of remaining oil.