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介绍了用于高温碳酸盐储层深度酸化压裂工艺的前置液和酸化液的选择标准,并结合大港油田板深7井储层特征对酸化压裂液体系进行了研究和优化。选出了适合该井深度酸化压裂的工作液及添加剂。试验结果表明,降阻稠化酸具有很好的缓速性能、降阻性能及防粘土膨胀性能,配伍性好;酸液体系均具有较低的表面张力,有助于残酸快速反排;前置液基液具有耐温、耐酸性,粘度适中,与降阻缓速酸配伍性好等特点,均能满足板深7井深度酸化压裂的要求。
The selection criteria of pre-fluid and acidizing fluid for the deep acid-fracturing process of high-temperature carbonate reservoirs are introduced, and the acid fracturing fluid system is studied and optimized in combination with the reservoir characteristics of Banshen 7 well in Dagang Oilfield. Selected for the depth of the well acidification fracturing fluid and additives. The experimental results show that the viscosity reducing acid has good retarding properties, resistance reduction properties and anti-clay swelling properties, compatibility; acid system has a lower surface tension, help reverse the rapid acid residue; Pre-liquid base fluid has the characteristics of temperature resistance, acid resistance, moderate viscosity, good compatibility with retarder retarding acid, and the like, and can meet the requirement of deep acid fracturing in Well Banshen7.