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.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2006年第2期62-65,共4页
Petroleum Geology and Recovery Efficiency
关键词
模拟试验
采收率
注水速度
粘度
稠油油藏
simulation experiment, recovery efficiency, flooding rate, viscosity, heavy oil reservoir
作者简介
李奋，女，工程师，1994年毕业于中国地质大学（武汉）石油地质专业，长期从事油气田开发试验研究工作。联系电话：（0546）8715380，E-mail：tswxlf@slof．com。
