永8断块稠油油藏渗流规律研究  

Study on percolation rule in heavy oil reservoir of Block Yong8

作　　者：李奋[1] 

机构地区：[1]中国石化胜利油田有限公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2006年第2期62-65,共4页Petroleum Geology and Recovery Efficiency

摘　　要：永8断块属于常规稠油油藏，为明确注水开发过程中油藏的油水运动规律和影响机制，通过室内物理模拟试验，借助显微镜和图像分析技术开展了渗流规律研究。研究结果表明，注水速度和冲刷时间的增加会导致胶结疏松的储层内部微粒运移，使储层渗透率升高；由于生产压降增大，渗透率降幅平均达到23．7％，且对储层造成的损害不会由于压降的减小而恢复到原始状态。对于该稠油油藏，其低速开发比高速开发最终采收率可提高2．6％～4．2％；在注水后期含水饱和度较高时，提高注水速度可增加采收率2．7％左右；而降低原油粘度，可有效提高采收率0．7％-2．1％。Block Yong8 is a common heavy oil reservoir. In order to understand the rules of oil - water movement and influence mechanism of the oil reservoir in waterflooding, using microscope and image analysis technique studied the percolation rules by laboratory physical simulation experiment. The research results show that increasing flooding rate and flushing time lead to fine particle migration in the unconsolidated reservoir and the permeability increase of the reservoir. Because of the increase of producing pressure drop, the decrease range of permeability was 23. 7% on the average and the damage to reservoir would not return to its original state for pressure drop decrease. For this heavy oil reservoir, the ultimate recovery efficiency can be increased 2. 6% -4. 2% by low - rate development than by high - rate development, and be increased 2. 7% by enhancing flooding rate when water saturation was higher in the later waterflooding period, and be effectively increased 0. 7% -2. 1% by decreasing oil viscosity.

关 键 词：模拟试验 采收率 注水速度 粘度 稠油油藏 

分 类 号：TE313.7[石油与天然气工程—油气田开发工程]