【摘要】 在塔河油田开发生产过程中,个别油井在修井作业中出现先漏后喷的现象。在修井完成后,产量较前期有大幅增加。针对这类油井进行单井注水吞吐采油试验,研究发现钻遇定容封闭性油藏的油井适合单井注水吞吐开采。一方面利用油水重力分异,抬升油水界面,增加采出量;另一方面注水补充地层能量,恢复地层压力。该方法在塔河油田实际应用中,取得了较好的效果和较高的经济效益,也为提高定容封闭性油藏油井的采收率提供了一个较好的方法。更多还原

【Abstract】 In the exploitation process of Tahe oilfield,the phenomena of "blowout following loss circulation" appear for some oil wells during work-over job.After the work-over job,the production increases at a big scale than before.Aiming at the oil wells,the test of water-flood huff and puff with single well is conducted for oil recovery.It is found the wells in the closed reservoir with constant volume are suitable to use water-flood huff and puff with single well for oil recovery.In one hand,the oil/water gravitational differentiation is utilized to raise the oil/water interface and increase the oil recovering volume.In the other hand,water is injected to supplement the reservoir energy and restore the reservoir pressure.Good results and economic benefits are achieved by application of the method in Tahe oilfield,and good reference is provided for the wells in the closed reservoir with constant volume to improve the recovery factor.更多还原