摘要
通过水力裂缝改造煤层,沟通更多的天然裂缝系统,可达到促进排水降压采气的目的。而煤岩由于强吸附特征和天然裂缝系统异常发育的储层特点,从压裂的角度而言将带来两大难题:一是煤储层与水力裂缝本身的伤害问题;二是裂缝的有效造缝与延伸的难题。通过数值模拟方法,以不同液体类型的压裂特点为出发点,研究了不同伤害因素对压后产量的影响程度,以及对裂缝造缝与扩展的影响,为煤层水力压裂材料与技术提供了一个优选的理论依据。
Stimulating coal reservoir by hydraulic fracturing in order to communicate more fissures in the reservoir make it possible to promote drainage and pressure drawdown and gas recovery.Its feature of strong adsorbability and very good growth of fissure brings 2 problems to fracturing job,the first is the damage of coal reservoir brought by fracturing,and the second is fracture forming and extending effectively.By numerical simulation,how seriously different the damage factors affect the flowing rate after fracturing and the fracture forming and extending is studied from fracturing features of different kind of liquids,and theoretical foundation of material and technique selection for hydraulic fracturing in coal reservoir is provided.
出处
《油气井测试》
2009年第2期1-4,共4页
Well Testing
关键词
煤层压裂
伤害
造缝
压裂液
hydraulic fracturing in coal reservoir,damage,fracture forming,fracture fluid
