热化学复合酸化解堵技术研究  

Study on the thermochemistry complex acidizing in W5 heavy oil reservoir, Jiangsu Oilfield

作　　者：蔡波[1] 袁玉峰[1] 袁萍[1] 俞力[1] 

机构地区：[1]江苏油田分公司石油工程技术研究院

出　　处：《钻井液与完井液》2003年第3期39-40,43,共3页Drilling Fluid & Completion Fluid

摘　　要：在稠油油藏进行常规酸化解堵易造成二次伤害,且残酸返排较难。以江苏油田W5块稠油为对象,开展了热化学复合酸化解堵技术研究,即优选合适的酸液配方,采用酸液溶蚀部分岩心及有机堵塞物,提高近井地带地层渗透率;同时在酸液中加入A剂.在后置液中加入B剂,分段注入后让其在地层中发生热化学反应,产生气体并放出大量的热,利用热化学反应产生的大量热量和气体,对地层有效升温,溶解有机物,降低原油粘度,促进残酸返排。优选出的多功能添加剂KB-28在降低表面张力和缓蚀性能上的作用较为明显,但抗酸渣的性能不强,因此在酸液中使用了抗酸渣剂KS-96。As the secondary damage and difficult flowbacking of the reacted acid can be produced during the conventional acidizing in the heavy oil reservoir, a technology of thermochemistry complex a-cidizing has been studied in W5 heavy oil reservoir of Jiangsu Oilfield. i. e. , optimizing the acidizing formulation and using the acidizing fluid to corrode partial of the cores and organic bulkhead to improve the permeability of immediate vicinity of wellbore; adding agent A in acidizing fluid and agent B in overflush fluid and then injecting them into piecewise formations and making thermochemistry reaction in the formations, thus, a great deal of gas and heat are generated. Because of the gas and heat, the formations are heated up, the organic matter are dissolved, crude oil viscosity is thinned and the flowbacking of the reacted acid is forwarded. However, optimized multifunction additive KB-28 has poor acid resistance although it plays significant roles in cutting down superficial tension and corrosion mitigation, therefore, resist KB-96 is used in the acidizing fluid.

关 键 词：热化学复合酸化解堵 稠油油藏 酸液配方 表面张力 缓蚀性 有机物堵塞 地层伤害 

分 类 号：TE358[石油与天然气工程—油气田开发工程] TE357.2