常温螺杆泵举升工艺在热采井中的初步应用

Preliminary application of conventional PCP lifting technology in thermal recovery wells

螺杆泵作为一种新型的机械举升工艺,具有节能、投资少、管理方便等诸多优点,但由于螺杆泵定子橡胶耐温的局限性,不适用于井底温度高蒸汽吞吐开发的油井。针对这一问题,开展了常温橡胶螺杆泵耐温性的研究与试验。在苏丹6区FNE38井注汽结束后直接采用PCM螺杆泵生产,获得阶段性成功。试验证明,在蒸汽吞吐井中控制温度,可采用常温螺杆泵进行举升,特别是在地层可能出砂的区块采用该技术可免去各种防砂措施,节省了大量的防砂费用,最大限度发挥油井产能,使常温螺杆泵可在温度较高的稠油油井中使用,拓宽了螺杆泵在稠油开采上的应用范围。

Progressive cavity pump(PCP) as a mechanical lifting technology has advantages of saving energy,less investment,and easy management,etc.,but is limited by temperature resistance of rubber stator and not suitable for cyclic steam stimulation wells with high bottom hole temperature.Experimental study has been carried out for the temperature resistance property of normal temperature PCP.In Well FNE38 of the Block 6 of Sudan,PCP from PCM was used straight after steam injection and had achieved initial success.The test has proved that conventional PCPs can be applied in CSS wells by controlling temperature,especially in sand-prone blocks to eliminate sand control measures,save sand control expenses and maximize oil well productivity.The application of conventional PCPs in high temperature heavy oil wells has broadened the scope of its application.