低频脉冲波强化采油技术研究及试验

STUDY AND TEST OF ENHANCED OIL RECOVERY TECHNIQUE USING LOW - FREQUENCY PULSE WAVE

宋建平 陈建华 刘斌

Song Jianping Chen Jianhua Liu Bin

河南石油勘探局

本文对低频脉冲波的技术性能、作用机理、对岩层岩心的裂缝效应、改善孔隙结构效应以及对流体的作用等方面进行了理论探讨和室内及现场试验。阐述了低频脉冲强化采油机理主要在于能使近井地带形成微裂缝网,疏通储层孔隙,改善孔隙中流体分布状态,降低原油粘度等。通过现场试验,证实了低频脉冲波强化采油技术可用于油水井除垢、降粘、解堵、增产增注等方面,而且该技术投资少、见效快、工艺简单,具有广阔的推广应用前景。被总公司新技术推广中心评为1994年油井增产优秀项目。

This paper discusses theorically the technical performance,action mechanism,fracture effect on formation core,effect on improvement of pore structure and action on fluid of low-frequency pulse wave,makes indoor and field tests.The enhanced oil recovery mechanism of low-frequency pulse wave lies mainly in that it may produce fracture near wellbore zone,dredge formation,improve distribution state of fluid in rock pore,and lower oil viscosity etc.Field test results show that this technique is useful for scale removal,viscosity reduction,plugging relief and stimulation of production and injection of oil and/or water wells,and that it has a vast application prospect because of small investmenst,quick returns and simple technology.It is chosen as excellent project of production stimulation of oil wells by dissemination centre of new technology of CNPC in 1994.

10.3969/j.issn.1000-7393.1994.06.016