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针对井下套管破损常致使地层流体窜槽,造成油井停产的情况,成功研制了一种新型LHD化学堵剂。该堵剂的活性剂与胶结固化材料快速反应形成具有纤维网架结构的水化物,能够承受较高的压差,并且微膨胀作用使封堵过渡层硬度和强度大大提高。LHD堵剂在SZ36-1-C25hf水平分支井应用成功,使日产油量高达200 m3。该堵剂性能可靠,稳定,具有广阔的应用价值。
In view of the fact that the downhole casing damage often causes the formation fluid to channel, resulting in the shutdown of the well, a new LHD chemical blocking agent has been successfully developed. The active agent of the blocking agent rapidly reacts with the cemented curing material to form a hydrate with a fibrous network structure, capable of withstanding a high pressure drop, and the micro-expansion effect greatly improves the hardness and strength of the blocking transition layer. LHD plugging agent was successfully applied in the horizontal branch wells SZ36-1-C25hf, bringing the daily oil production up to 200 m3. The blocking agent performance is reliable, stable, with broad application value.