姬塬油田注水开发中出现了注水井压力偏高、注水量下降或注不进水的现象.本文分析了其产生原因,针对性的开发研究了多组分复合微乳液增注工艺技术,在现场试验中取得了较好的效果.

环保生物酸解堵剂是一种高性能的生物活性酸,不仅可以解决油井堵塞的问题,还可以解除钻井、压裂等聚合物的残渣伤害.环保生物酸能有效保证酸进入油水井井眼深处,且酸化形成物对地层伤害很小,具有有效期长、无需返排的特点.在胡尖山油田的现场应用表明,油井产液、产油上升较快,含水稳中有降,措施效果较好.

In order to solve the problems of low permeability reservoir blocked reasons in Ansai oilfield, the multi-component composite plugging relief and injection gain technology is proposed in this paper, through laboratory experiments simulating the adaptability of this technology in Ansai low permeability oilfield. Acid treatment of plugging solution has a significant effect to improve the low permeability reservoir core and oxidants play a lower corrosion rate and the protection of steel. The tests in Ansai oilfield show that fluid and oil production increased rapidly but water smooth in oil wells ,the effect of increasing oil is obvious; water injection can achieve injection allocation requirements at the same time, the injection pressure significantly decreased, long period of validity, the effect on decreasing injection pressure and improved injection capacity are satisfactory.

The multi-component Pad-acid fracturing technology squeezes low injury retarder acid systems before fracturing, rely on the pressure of fracturing and acid etching to open formation and crack propagation pressure. A major role of this technology is improving reser- voir permeability, inhibiting clay mineral expansion, dissolution of the fracturing fluid filter cake adhesive residue ,improve the conductivity and other aspects of the role to improve the effect of reconstruction. The tests in Jiyuan oilfield show that fluid and oil production in- creased rapidly but water smooth in oil wells, the success rate is 100 % and had a long valid period , the average single well increased oil 2.35 t,the effect of increasing oil is obvious. Pad-acid fracturing technology has a better adaptability to the low permeability sandstonereservoirs and provides a new technology for the transformation of low permeability oilfield in Changqing.

鄂尔多斯盆地姬塬油田三叠系延长组长2油层以低电阻著称.姬黄37区耿231井区长222油层即为典型的低电阻、高含水油层.主要从该区块长222油层的储层特征出发,来分析本区长222油层低电阻成因,从而更好的认识长222低电阻油层,为下一步挖潜增储提供地质依据.