摘要
室内静态评价除硫剂除硫效果与现场应用时的除硫效果差距较大,现有除硫剂评价方法中存在取样不准、静态评价除硫剂除硫效率低于实际、硫化物浓度作为实验测定指标结果易受干扰等情况。以钻完井液、压井液等工作流体在实际井筒中循环过程为依据,针对性设计液体量为65 L的物理仿真模型,工作流体在井筒装置中以0~1 m^3/h流量循环模拟除硫剂流动形式,且能够模拟直井、斜井或水平井产层产出压力为0.05~0.50 MPa的混合气体,并以模拟井口H2S浓度为测定指标优选测定方法,运用微积分计量测定结果。实验过程中,通过记录模拟井口H2S气体浓度曲线计算除硫剂除硫效率。室内评价结果表明,动态评价装置的监测结果直观,提高了除硫剂除硫效果评价的准确性与可重复性。该评价结果真实可靠,可为现场作业补充除硫剂提供指导。
The on-situ sulfur removal effect is quite different from the indoor static evaluation of sulfur removal agent.For the indoor static evaluation of sulfur removal agent,the sampling is inaccurate,the static evaluation sulfur removal efficiency of the sulfur removal agent is lower than the actual situation,and the sulfide concentration is easily interfered as the result of the experimental measurement index.Based on the circulation process of drilling and completion fluids,controlling fluids and other working fluids in the actual wellbore,a physical simulation model with a liquid volume of 65 L is designed.The working fluid is simulated in the wellbore device with a flow rate of 0~1 m^3/h.The flow form of the agent can simulate a mixed gas with a production pressure of 0.05~0.50 MPa in a vertical well,an inclined well or a horizontal well.A preferred method for measuring the H2S concentration of the simulated wellhead is selected as a measurement index to calculate measurement result.The sulfur removal efficiency of the sulfur removal agent was calculated by recording the simulated wellhead H2S gas concentration curve.The indoor evaluation results show that the monitoring results of the dynamic evaluation device are intuitive,and the accuracy and repeatability of the sulfur removal effect evaluation of the sulfur removal agent are improved.The evaluation results are authentic and can provide guidance for the addition of sulfur removal agents for on-site operations.
作者
曾浩
常启帆
张旺
李兵
王超
吴通
ZENG Hao;CHANG Qifan;ZHANG Wang;LI Bing;WANG Chao;WU Tong(Petrotechnical Engineering Research Institute,Sinopec Zhongyuan Oilfield Company,Puyang,Henan 457001,China;School of Petroleum and Natural Gas Engineering,China University of Petroleum(Beijing),Beijing 102249,China;Plugging Fluid Technology Research and Development Branch,Beijing LihuiLab Energy Technology Co.,Ltd.,Beijing 102200,China)
出处
《油气井测试》
2020年第1期74-78,共5页
Well Testing
基金
国家科技重大专项“大型油气田及煤层气开发-高含硫气藏改善储层动用状况工程技术”(2016ZX05017-002)
关键词
实验装置
硫化氢
除硫剂
除硫能力
动态评价
静态评价
绒囊流体
experiment device
H 2S
sulfur removal agent
sulfur removal capacity
dynamic evaluation
static evaluation
fuzzy ball fluids
