缝洞型储层酸压暂堵剂封堵性能研究  

Study on performance of temporary plugging agent of acid fracturing in fractured-vuggy carbonate reservoirs

作　　者：牟建业[1] 邵俊杰[1] 陆赟芸[2] 李栋[1] 侯腾飞[1] 程相征 贺雨南 

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]大港油田滩海开发公司,天津300280

出　　处：《中国科技论文》2016年第3期258-262,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(51274213)

摘　　要：针对塔河油田缝洞型碳酸盐岩大型复合酸压过程中液体滤失严重的现象,利用高温高压酸岩反应流动仪对粉陶、可降解纤维、油溶性树脂3种暂堵剂进行了室内实验,测得这3种暂堵剂在不同加量下的最大驱替压差和暂堵时间,并从暂堵效果、对地层伤害、价格和施工等方面评价了这3种暂堵剂。结果表明:加量越大,3种暂堵剂的最大驱替压差越大,暂堵时间越长;暂堵剂加量为1g时,油溶性树脂的最高驱替压差分别是可降解纤维和粉陶的10.67倍和14.38倍,暂堵时间分别为可降解纤维和粉陶的6.73倍和10.57倍,油溶性树脂的暂堵性能远优于可降解纤维和粉陶;但可降解纤维和油溶性树脂在高温下可降解,随返排液体流出地层,对储层造成的伤害较小。实验结果为塔河缝洞型碳酸盐岩储层酸压改造暂堵剂的选择提供一定的参考。Large composite acid fracturing is the main stimulation method in the Tahe carbonate reservoirs.However,abundant naturally fractured vuggy systems result in serious acid leak-off.Using acidizing flow instrument at high temperature and pressure,experiments were carried out to evaluate the plugging performance of ceramic powder,fiber and oil-soluble resin,respectively.The maximum displacement pressure and temporary plugging time were tested at different mass of the temporary plugging agents.These three agents were evaluated from aspects of the reservoir damage,price,construction and effect of temporary plugging.Experimental results show that the maximum displacement pressure and plugging time increase as the mass of the temporary plugging agent increases.When the mass of temporary plugging agent is 1g,the maximum displacement pressure of oil-soluble resin is 10.67 times that of fiber and 14.38 times that of ceramic powder.Furthermore,the plugging time is 6.73 times longer than that of fiber and 10.57 times longer than that of ceramic powder.Hence,the plugging properties of oil-soluble resin are much more prior to others.Oil-soluble resin can degrade at high temperature and flow along with flow-back liquid without damaging to reservoirs The experimental results have guiding significance in choosing temporary plugging agents of acid fracturing in the Tahe naturally fractured vuggy Carbonate Reservoirs.

关 键 词：缝洞型储层 酸压 酸液滤失 降滤失剂 暂堵剂 暂堵性能 粉陶 可降解纤维 油溶性树脂 塔河油田 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]