卫2块气顶底水油气藏剩余油分布研究

针对卫2块气顶底水油气藏的地质特征，应用地质建模软件建立起构造模型、储层模型，展现出气顶底水油气藏的构造和储层特点，通过建立不同的油层、水层、气层物性解释图版，应用地质统计学方法精确计算出储层非均质参数，描述了该断块储层的非均质特征。在此基础上，应用VIP数模软件描述了剩余油分布特征，讨论了气顶底水油气藏剩余油的分布特征，认为剩余油主要分布在注采系统局部不完善区、未注水的弹性区、未受油水井控制的储量损失区；而剩余气则主要集中在北部地区和顶部砂组。根据所提出的剩余油气分布认识，进行了治理方案部署，经实施后取得了良好的效果，平均年增油2.3×10⁴t，年增气0.2×10⁸m³，年综合递减减缓2.1%。实现了油气同时高效开采。

Remaining Oil Distribution in Bottom Water Oil Reservoir with Gas Cap of Wei 2 Block

Aiming at the geologic characteristic of bottom water reservoir with gas cap,the geologic moddelling software is used to set up structural model and reservoir model,and illustrate the structure and reservoir characteristics of the bottom water reservoir with gas cap,by depicting physical property explanation plots of oil reservoirs,aquifers and gas formations,the geostatistic method is applied to precisely calculate the parameters of reservoir heterogeneity and describe the heterogeneitic characteristic of the faulted block reservoir,in view of the consequence,VIP numerical simulation software is employed to describe the distribution feature of remaining oil,also,the distribution feature of remaining oil of bottom water reservoir with gas cap and the influence of gas cap and bottom water on remaining oil are discussed in this paper,it is recognized that the remaining oil is mainly concentrated in the locally incomplete areas of injection and production system,the elastic areas without water injection and the reserve loss areas not controlled by oil and water producers,the remaining gas is mainly distributed in the north areas and the top sand formations.Based on the acquisition,adjusting scheme is put forward and good result is achieved after implementation,on the average,oil and gas yield increases by 2.3×10⁴ t and 0.2×10⁸ m³ respectively,comprehensive decline slows down by 2.1%,oil and gas are produced with high efficiency in the same time.