共查询到18条相似文献,搜索用时 234 毫秒
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一种井下参数测试仪的研制 总被引:3,自引:0,他引:3
射孔工艺是石油开采的一个关键环节 ,射孔时产生的巨大的冲击加速度和压力常造成射孔枪和仪器的损坏 ,为了测量射孔时产生的应力和加速度 ,为制订完善的射孔工艺 ,提供科学依据。设计了一种能用于井下高温、高压环境的加速度压力测试仪 ,介绍了仪器的结构、工作原理 ,并给出了试验结果 相似文献
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在射孔过程中射孔器腔内会产生二次压力脉冲,一次压力脉冲是一种对于腔内压力测试系统的抗冲击设计、频响设计以及传感器选择的重要参数;二次脉冲是石油企业工程分析的重要参数;为了在高温、高压、高冲击环境中测得一次脉冲,为射孔器腔内压力测试系统的设计提供重要依据,延长射孔器枪内压力测试系统的使用寿命和降低高昂的成本实现信号的完整采集,保证动态测试精度,从实际应用需求出发,给出了系统频响展宽的总体设计方案和测试信号的技术指标。 相似文献
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针对石油井下射孔压力测试中,在射孔完井过程中会释放大量的热量,压阻式压力传感器的温度效应成为影响测试精度的主要因素。为准确测取井下压力,用现有模拟油井试验装置模拟井内高温高压环境建立了校准系统。在多个温度环境下进行校准试验,通过与溯源性校准的标准测试系统的对比计算,利用最小二乘法得出压阻传感器在不同温度条件下的灵敏度,根据测试仪采集的实时温度数据值修正了压力数据,计算表明压力曲线峰值比修正前小1.4 MPa,为压力峰值的2.08%,表明该压阻传感器温度效应产生的影响不可忽略,基于模拟油井的温度修正校准方法能有效减小温度效应的影响,提高了测试精度。 相似文献
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During horizontal drilling operations, real-time prediction of drilling pressure during the drilling process can help the drilling team cope with the complex and changing working environment downhole, adjust the parameters of the drilling rig promptly, make correct decisions, reduce the probability of drilling accidents, and avoid affecting the duration and cost of the project. This study provides a method for real-time prediction of the drilling pressure of horizontal drilling rigs. A deep learning model based on a convolutional Transformer is trained for accurate real-time prediction by extracting real-time operating data of the horizontal drilling rig from the data acquisition system. The method proposed in this study can be a useful tool to improve the performance of horizontal drilling rigs and can assist the drilling team in operating horizontal drilling rigs. The results of the case study show that: (1) the proposed convolutional Transformer model provides reliable real-time prediction with an MAE of 0.304 MPa and an RMSE of 0.508 MPa; (2) the proposed method can quickly and accurately predict the trend of drilling pressure change in the next period based on the current change of drilling pressure, and grasp the dynamics of drilling pressure of horizontal drilling rigs in advance. Further research could focus on assisted decision-making and intelligent optimization to provide solutions for preventing drilling accidents and improving horizontal rig performance based on the prediction. 相似文献
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本文介绍利用石英谐振器研制压力传感器.对该传感器的工作原理、结构及室内实验结果进行了详细的描述.该传感器已成功用于油田井下压力测量仪器,测量精度达0.05%. 相似文献
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A new approach for supporting reactive capability is described in the context of an advanced object-oriented database system called ADOME-II. Besides having a rich set of pre-defined composite event expressions and a well-defined execution model, ADOME-II supports an extensible approach to reactive processing so as to be able to gracefully accommodate dynamic applications’ requirements. In this approach, production rules combined with methods are used as a unifying mechanism to process rules, to enable incremental detection of composite events, and to allow new composite event expressions to be introduced into the system declaratively. This allows the definition of new production rules each time an extension of the model takes place. Methods of supporting new composite event expressions are described, and comparisons with other relevant approaches are also conducted. A prototype of ADOME-II has been constructed, which has as its implementation base an ordinary (passive) OODBMS and a production rule base system. 相似文献
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本文研究了基于事件驱动控制的混杂动态博弈系统的纳什均衡分析问题. 首先, 分析了事件驱动机制对混
杂动态博弈过程的影响, 进而, 在进行状态空间描述的基础上, 给出了混杂动态博弈的纳什均衡的定义, 并建立了对
应博弈系统的策略型模型. 其次, 结合Lanchester方程, 分别讨论了两类混杂动态博弈系统的均衡问题, 包括事件驱
动策略设计和固定的情况, 获得了均衡解存在的必要条件. 最后, 通过数值模拟进行了应用分析, 验证了所取得结果
的合理性和科学性, 并总结了混杂动态博弈研究的未来工作. 相似文献
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主要介绍了油田射孔器耐高温超高压自动检测系统的设计与实现 ,并讨论了超高压控制系统、温度控制系统以及控制软件的设计。该系统具有检测精度高、工作安全可靠、操作简便等特点。该系统中的超高压 (大于 2 0 0MPa)液压控制系统的研制成功 ,填补了国内的空白。 相似文献
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针对控压钻井过程中井下可能发生气侵的特殊工况,提出一种可在异常工况下估计井底压力,并借此判断异常工况的方法.首先,基于简化的漂移通量模型,在传统控压钻井水力学模型中添加气体膨胀项,建立控压钻井气液两相流模型;其次,将井下环空摩擦积分和井底气侵量视为未知参数,将井底流量视为未知状态,设计一种可对未知参数以及未知状态进行联合估计的自适应观测器,并以此为基础估计井底压力;最后,通过仿真实验验证所提方法的有效性.仿真结果表明,所建气液两相流模型可在井下发生气侵时模拟井底压力变化,且所提观测器能实时准确地跟踪井底流量及压力变化. 相似文献