双链表面活性剂压裂液研究及应用  

RESEARCHES AND APPLICATION OF DOUBLE-CHAIN SURFACTANT FRACTURING FLUID

作　　者：王贤君[1] 张明慧[1] 

机构地区：[1]大庆油田有限责任公司采油工程研究院,黑龙江大庆163453

出　　处：《大庆石油地质与开发》2015年第5期77-80,共4页Petroleum Geology & Oilfield Development in Daqing

基　　金：黑龙江省高等学校青年学术骨干支持计划"深部裂缝性凝灰岩层水力劈裂机理的分形研究"(1254G002);国家自然科学基金"钻头谐振激励下岩石的响应机制及破碎机理研究"(51274072)部分成果

摘　　要：开发应用了一种由双链表面活性剂及氯化钾组成的清洁压裂液,无需添加其他添加剂。与以往表面活性剂清洁压裂液对比,耐温性能达到120℃以上,形成胶束能力更强,交联剂为无机盐,用量低于0.7%,施工安全性提高;在120℃、170 s^(-1)条件下,经过60 min的剪切,黏度在30 mPa·s以上;压裂液破胶液无残渣,对陶粒充填裂缝导流能力伤害率小于9%,对基质岩心渗透率伤害率为4.2%,比瓜尔胶压裂液降低70%。在海拉尔油田低渗透储层2口井3个层现场试验,施工成功率100%,平均单井初期日产油量6.46 t,增产效果良好。A clean fracturing fluid surfactant is developed and applied, which is composed of double-chain surfac- tant and potassium chloride without adding other additives. Comparing with the previous clean surfactant fracturing fluids, its temperature resistance can reach 120 ℃ or above, its formed micellar ability is greatly stronger, the cross linking agent is inorganic salt whose dosage is less than 0. 7%, so the construction safety is perfectly improved; under the conditions of 120 ℃ and 170 s-l, after 60-minute shear, the viscosity can achieve more than 30 mPa · s ; no residue when the viscosity breaking by the fracturing fluid, the damage rate of the fracturing fluid to the haydite filled fracture diverting capacity is less than 9%, the damage rate of the fracturing fluid to the substrate/ matrix core permeability is 4.2%, i. e. reduced 70% compared with guar-gum fracturing fluid. Three low-permeability reservoirs of the two wells in Hailer Oilfield were tested, the construction success rate achieved 100% and the average daily oil production of the individual well is up to 6.46 t, much better production simulation has been obtained.

关 键 词：压裂液 双链表面活性剂 地层伤害 裂缝导流能力 

分 类 号：TE357[石油与天然气工程—油气田开发工程]