摘要
为了提高高凝油油藏的压裂施工效果 ,必须避免注入地层的冷流体引起井底周围的原油冷却 ,导致原油析蜡或凝固 ,从而降低裂缝的导流能力。为解决这一问题 ,研究采用自生热压裂技术 ,利用生热剂发生化学反应放出的热量 ,以加热压裂液和油层的近井地带 ,保证压裂液在进入裂缝后不会对油层造成“冷伤害” ,达到提高裂缝渗流能力 ,增加油井产能的目的。文中探讨了自生热压裂的压裂、生热机理 ,生热剂的反应动力学特征 ,影响自生热速度的因素 ,自生热压裂液的配方研究 。
In order to improve the effectiveness of fracturing in high pour point oil reservoir, cooling of crude oil around bottom hole, wax precipitation and solidification, and reduction of flow conductivity in fractures resulted from injecting cold fluid into formation must be avoided. To solve this problem, thermogenic fracturing technique has been studied and adopted. It uses thermogenic agent to emit heat by chemical reaction, to heat the fracturing fluid and near wellbore formation, to avoid 'cold damage', to improve percolation of fractures, and to increase oil production. This paper also discusses the mechanism of thermogenic fracturing, the reaction kinetics of thermogenic agent, factors affecting thermogenic speed, the formula of thermogenic fracturing fluid, and the process of fracturing operation.
出处
《特种油气藏》
CAS
CSCD
2003年第2期80-81,97,共3页
Special Oil & Gas Reservoirs
关键词
高凝油油藏
自生热压裂技术
原理
配方
施工工艺
high pour point oil reservoir
thermogenic fracturing
principle
formula
operating process
