【摘要】 大庆油田海拉尔盆地兴安岭群火山岩储层主要为安山—流纹质凝灰岩、安山质凝灰岩、粗面—流纹质凝灰岩,在水力压裂过程中,发生压裂早期砂堵,返排率低,压裂成功率低。针对这些特点,通过岩石水理特性实验和岩石力学特征研究,提出了以下解决措施:①凝灰质火山岩储层粘土含量高时,应提高压裂液的防膨胀性能,大排量施工,增加裂缝净压力;②碱性和偏碱性凝灰质储层,应研究使用低滤失压裂液,降低滤失量,同时提高压裂液的防膨胀性能;③凝灰质储层塑性较强时,应尽量提高施工排量。更多还原

【Abstract】 The tuffaceous volcanic reservoirs of Xing’anling group in Hailaer Basin, Daqing Oilfield, includes andesite-rhyolite tuffaceous, andesite tuffaceous and trachy-rhyolite tuffaceous volcanic rocks. In the process of hydraulic fracturing, there are some problems to deal with, such as early sand plug, low return discharge rate and low success rate of fracturing. Through the experiment of rock hydraulic property and rock dynamics features research, it is put forward that the measures to be launched include: ① For tuffaceous,volcanicreservoirs with high-content clay, it is should increased the preventing dilatability of fracturing fluid, enlarging discharge capacity construction, in order to boost the net pressure of fractures;②For alkaline tuffaceous and ultra-alkaline tuffaceous reservoirs, it is should utilized the fracturing fluid to reduce filtration loss and enhance the preventing dilatability of fracturing fluid;③ For strong plastic tuffaceous reservoirs, it is should enlarged the discharge capacity.更多还原