负压返排酸化技术在侏罗系油藏的应用及评价

针对侏罗系油藏部分油井酸化时洗井返排率低,对措施剥落的机杂颗粒和二次沉淀物无法彻底排除的问题。通过分析,揭示了常规酸化对地层能量较高的油井解堵效果好,而对地层能量低的油井解堵效果不理想,反而容易造成二次污染,根据这一情况,提出了负压返排酸化技术,通过现场试验及应用,取得了较好的增油效果,该技术的成功实施进一步丰富了酸化解堵技术系列,为侏罗系油藏的稳定高效开发提供了强有力的技术支撑。

Acidification of negative pressure backflow Jurassic reservoir in the application and evaluation

Part of the Jurassic reservoir for oil well acidizing backflow when the flushing rate,falling off the machine complex of measures and secondary sediment particles can not completely rule out the problem.Through analysis,revealed the formation of conventional acidification on higher energy effective plugging of wells,while wells with low formation energy, plugging the result is not ideal,but likely to cause secondary pollution,according to this situation,the proposed negative pressure backflow Acidification of technology through field trials and applications,and achieved good results by the oil,the successful implementation of this technology to further enrich the acidizing technology series,for the stability of the Jurassic reservoir development to provide a strong and efficient technical support.