注汽热采条件下稠油井下催化改质的研究进展

对在注汽热采条件下稠油井下改质过程所用的供氢体、催化剂及改质条件进行了评述,结果表明,在注汽热采条件下井下稠油催化改质宜采用均相催化剂及液态供氢体,由于环己烷对稠油的催化降解作用可以发生在催化剂表面,有望成为稠油改质过程所需的经济型供氢体。而含油岩层中的矿物质对稠油井下改质过程具有催化作用,可以作为稠油井下改质过程的催化剂,使原油免受污染,且可简化操作。

Advances in downhole catalytic upgrading of heavy oil under steam injection conditions

The downhole upgrading process of heavy oil involves reactants,catalysts and processing conditions,etc.The influences of these factors on the upgrading of heavy oil are comprehensively reviewed.The results indicated that the suitable hydrogen donors were of liquid state and the proper catalysts were homogeneous under the steam injection conditions.Since the dehydrogenation of cyclohexane could take place over catalysts under the steam injection conditions,it may be a potential hydrogen donor with feasible economy.The research results demonstrated that the mineral materials in oil-bearing formation have some catalytic effects on upgrading of heavy crude oil,therefore,these mineral materials could be used as the catalysts in downhole upgrading process of heavy oil,keeping the crude oil from pollution and also simplify the operation.