担载催化注空气低温氧化实验研究

Experimental Study on Low-temperature Oxidation in Air Injection with Supported-catalyst

以新杜1块储层为研究对象,筛选了8种担载催化材料,经过石英砂表面处理制成低温氧化实验岩心。通过常规岩心和担载催化岩心的空气与原油低温氧化实验,比较了反应前后空气组成和原油组分的变化。实验说明:有效的担载催化岩心可大大提高空气与原油的低温氧化反应速度,与常规岩心相比氧化反应速度可提高7倍多;低温氧化反应使长链的碳氢化合物部分氧化形成短链的碳氢化合物,加入催化剂后使发生断裂的碳链范围增大,生成的短碳链更加集中;通过担载催化材料的方法,可以大幅度提高注空气低温氧化的安全范围,为现场试验提供安全保障。

Taking reservoirs of Xindu Block 1 as an example,8 types of supported-catalyst materials are screened and experiment cores of low temperature oxidization are made by means of the surface treatment of quartz sand.The low temperature oxidization experiments of crude oil with air are conducted for conventional cores and supported-catalyst cores respectively and the variations in the composition of both air and crude oil before and after reaction are compared.The experiment shows that effective supported-catalyst cores can largely increase the reaction speed of crude oil and air under low temperature and it can increase reaction speed by 7 times;low temperature oxidization can make long chain hydrocarbons become shot chain hydrocarbons,catalyst can enlarge the broken chains and short chains are centered;the method of supported catalyst can largely increase the safety scope of air injection under low temperature and provides safety guarantee for the in-depth study on air injection in field.