抽油井开关井后液面变化规律

Fluid Change Rule after Well-opening to Produce and Oil Well Shutting-in in Pumping Well

唐人选

Tang Renxuan

中石化新星石油公司华东石油局试采大队

Well-Testing and Production Team of Easten China Petroleum Bureau, Taizhou Jiangsu 225300 , P. R. China

根据质量守恒原理及达西定律和井筒流体的分布规律,从理论上推导出油井关井后液面恢复与时间的关系式及开井生产后液面下降与时间的关系式,并讨论了影响液面升降快慢的因素及t = 0 , t →∝时两种特殊情况下的液面表达式。在推导过程中对油井关井后的液柱分布状况进行了分析,给出了井底流压与液面的恢复关系式。作者的研究成果对低产井间抽制度及不关井液面恢复测试的研究均具有一定的指导意义。

Based on the mass conservation law and the Darcy’s law , the paper deduces the relational expressions between fluid building-up and time after oil well shutting-in and between fluid going-down and time after well-opening to produce. It also briefly discuss the factors to influence the speed of fluid going-up or going-down and the fluid expressions under the two special conditions that t = 0 and t→∝ during the deducing process. The paper analyses distribution of liquid column after oil well shutting in , and gives out the relational expression between flowing bottomhole pressure and fluid building-up. The achievement of the paper could be referred in study on batch extraction system and study on fluid build-up test while not shutting in.