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压裂增产处理油井的产能会随时间出现不同程度的下降。从地质-矿场角度分析认为,最主要的原因是由于压裂液分解产物、砂子微粒、黏土和稳定的油水乳化液在裂缝和地层孔隙空间的淤积,导致油井在开采过程中的地层裂缝和表层堵塞。研究和试验表明,压裂井产量明显下降时用溶剂处理最有效,用酸组分处理的效果较差。根据上述研究结果,通过大量的室内研究和矿场试验,成功开发了一种借助于水力冲击抑制-压降作用,将蜡溶剂或酸液挤入地层,清洗地层裂缝和近井地带,并立即排出反应产物的压裂井恢复产能新工艺。
Productivity of fracturing stimulation wells will decrease in varying degrees over time. From the geological-mine point of view, the main reason is that the fracturing fluid fracturing products, sand particles, clay and stable oil-water emulsion in the fissures and formation pore space deposition, leading to formation fractures and Surface blockage. Research and tests show that when the yield of fracturing wells is obviously decreased, the solvent treatment is the most effective and the treatment with acid components is less effective. Based on the above results, a large amount of laboratory studies and field tests have been successfully developed to squeeze wax solvent or acid solution into the formation by means of hydraulic impact suppression-pressure drop, to clean formation fractures and near-well zones and to immediately A new technology of recovery of production capacity of fractured wells from which reaction products are discharged.