Study on flow safety of oil and gas pipelines throughout the life cycle
The changes in pipelines operating parameters affect the fluid flow state,and studying the flow state of oil and gas pipelines under different operating conditions is of great significance for ensuring production safety.An oil and gas pipelines flow model is established using OLGA,the impact of different parameter changes on flow safety is studied,and adaptive adjustment measures are proposed.The results show that the high water content of crude oil has the greatest impact on fluid pressure.Under this working condition,excessive wellhead back pressure should be prevented from causing a decrease in oil and gas production efficiency,while the delivery flow rate and gas-liquid ratio have relatively little impact on fluid pressure.When the transmission volume,moisture content and gas-liquid ratio increase,the temperature loss of the pipeline decreases,thereby reducing the risk of fluid condensation and wax formation in the pipelines.There is a risk of wax accumulation in pipelines with small transmission volumes and low moisture content.Heating measures should be set up or pipes should be cleaned regularly.Large flow rate,high water content,and high gas-to-liquid ratio will cause the slug flow pattern coverage in the pipeline to become wider and the fluid flow stability to decrease.Attention should be paid to the stability of pipelines along the way and the ability of equipment at the outlet to resist slug impact during the 3-7 year and mid to late stages of oilfield development.
oil and gas pipelineflow safetywax formationflow patterncondensate pipe
万方数据
维普
