加拿大SAGD油砂集输管网适应性评价

摘要

集输管网适应性评估是对已设计好的管网系统面对将来可能出现的工况进行模拟，评估其适应能力。运用数值模拟技术手段，建立了加拿大 Mackay River SAGD 油砂乳状液集输管网的瞬态计算模型，分析了分输、混输两种集输模式管网系统的温降、压降等水力-热力特性。结果表明，两种模式下设计的管网系统均可以满足采油，分离等生产工艺的要求。对于管网腐蚀问题，运用腐蚀模型进行了模拟计算，结果表明分输情形下 CO2腐蚀严重，建议使用混输模式。特别地，对于井口出砂对管线弯头的磨蚀预测进行了模拟计算，结果表明出砂磨蚀并不严重，管网整体适应性良好。这种多相混输及磨蚀的模拟计算，为加拿大 SAGD油砂集输管网适应性评价提供了较为准确的手段，可为管网的规划、改造及优化提供依据。%Gathering pipeline network adaptability evaluation,is to simulate the existing network when facing future possible working conditions,so as to assess its adaptability.Through numerical simulation,Canada Mackay River SAGD oil sand emulsion gathering pipeline network ’s transient state is established, and Separated transportation and Multi-phase transportation modes’hydraulic-thermal characteristic are analyzed,such as temperature dropping and pressure dropping.The result shows that the network based on the above two modes could satisfy the oil extraction and treatment requirement.For network corrosion issue,corrosion model is established to do the analog calculation.The result shows that in the separated transportation mode the carbon dioxide corrosion is severe,so multi-phase transportation is recommended.Furthermore,the sand erosion prediction on pipeline elbow is calculated,the result shows that the erosion is not serious,network adaptability is good.The multi-phase transportation and erosion analog calculation provides a accurate way of Canada SAGD oil sand gathering network adaptability evaluation,and it could be used for the network programming/updating/optimizing.