In order to further enhance heavy oil recovery in Liaohe oilfield, heavy oil fire-flooding research and field test have been carried out in Block Du66 since 2005.Through foreign technical investigation, current situation investigation and technical tackling,the matching surface technology for the effective exploitation of Liaohe heavy oil reservoir has been formed, including air injection, small ring series oil gathering, pre-dehydration of crude oil, desulfurization and hydrocarbon removal of tail gas, high efficiency air flotation of sewage, etc.A Fire-flooding industrial zone integrating high pressure gas injection, oil and gas gathering and transportation, crude oil dehydration, tail gas treatment and sewage treatment has been built.By the end of 2018, 141 well groups have been built in Block Du66, with an annual oil production scale of 26.3×104t and an annual gas injection of 3.53×108Nm.