非均质砂岩油藏先堵-后酸综合增产工艺技术

Intergral Stimulation Technique of Plugging First and Then Acidizing in Heterogeneous Sandstone Reservoirs

介绍了非均质油藏先堵-后酸综合增产工艺技术原理、特点、高强度堵剂及酸液的性能评价及现场应用效果。从原理及技术特点上说明了该工艺的可靠性,现场试验效果证明了该工艺的有效性。把堵水和酸化这两种不同的配方和改造工艺有机地结合起来,对进入高含水期的非均质油藏的挖潜增效、降低成本起到了不可低估的作用。该工艺有较好的推广应用前景。

Abstract: The technical principles and characteristics of integral stimulation of plugging first and then acidizing in heterogeneous sandstone reservoirs, and a high strength blocking agent, acid property evaluation and the effect of field application are introduced. The technical stability is described in principle and technique, field test indicates that the technique is effective. The techniques of water plugging and acidizing of different formulae are integrated with reconstruction process for tapping the potential in heterogeneous sandstone reservoirs at high water-cut stage, which plays an important role in reducing cost, thus the technique is prospective for introduction and application.