摘要：Heavy oil resources are an important part of the future energy structure worldwide.The main method of heavy oil extraction is thermal extraction.Reasonable selection of steam injection parameters is of great significance to reduce the heat loss of pipelines and wellbore,increase the service life of pipes and wellbore,and improve the economic benefits of heavy oil production.In this paper,the actual field data is used to analyze the sensitivity of various steam injection parameters including boiler outlet parameters and wellhead injection parameters.The research results show that under the same steam injection rate,the heat loss rate increases with the increase of pipeline length; as the steam injection rate increases,the heat loss rate gradually decreases.The steam quality of the bottom hole increases slightly with the increase of steam injection time,but the increase is not very large.The bottom hole steam pressure gradually decreases with the increase of steam injection rate.For the same steam injection rate,when the steam injection rate is small (steam rate ^ 150 t/d),the bottom steam pressure is greater than the wellhead steam pressure; on the contrary,when the steam rate is large When,the bottom steam pressure is less than the wellhead steam pressure.As the dryness of the injected steam at the wellhead increases,the heat loss rate at the bottom of the well gradually decreases.With the increase of wellhead injection steam pressure,the bottom hole heat loss rate continues to increase,and the steam dryness continues to decrease.This research is of great significance for improving the economic benefits of heavy oil production.
关键词：Heavy oil resources;steam injection thermal recovery technology;sensitivity of steam injection parameters;heat loss rate;economic benefits.
