庆深气田深层钻完井配套技术          下载免费PDF全文

韩福彬  杜敬安  王忠福  姜玉芳 《探矿工程》2015,42(12):18-22

自庆深气田徐深1井取得深层天然气勘探重大突破以来,大庆油田步入了油气勘探开发并举阶段。2004—2010年完成123口井,平均井深4118 m、钻井周期141 d,钻井技术水平较低。虽然开展提速技术攻关取得一定效果,但仍然不能满足天然气快速增储上产的需求,还存在着固井后井口带压问题,急需深入开展钻完井技术攻关。自2011年起,借鉴国内外深层提速技术成果,分开次、分层段针对岩性特点制定提速对策,通过优化井身结构、优选高效PDC钻头、实验并自研液动旋冲和涡轮等新型提速工具,大幅度提高了深井钻井技术水平,2011—2013年完成19口井,平均井深4075 m、同比缩短钻井周期48.6 d;针对井口带压问题,综合分析其产生因素,开展系列技术研究,形成了防气窜固井配套技术,为深层天然气快速增储上产提供了支持和保障。  相似文献   

关于风力发电机组加强火灾探测报警系统与消防系统设计的研究     

武在前 《中国勘察设计》2011,(12):98-100

本文通过分析风力发电机组发生火灾的原因,针对风力发电机组中火灾探测报警系统的特点,提出了适合的火灾探测器;并介绍了风力发电机组火灾探测报警系统设计中要注意的几个原则。  相似文献   

基于风速高相关分区的风电场风速预报订正          下载免费PDF全文

石岚  徐丽娜  郝玉珠 《应用气象学报》2016,27(4):506-512

为了提高风电场风速预报和功率预测的精度和准确率,并考虑风机测风数据的不稳定因素,以多年服务的内蒙古中部某风力发电场A为研究区,在勘察风电场地形及风机布局后,按照季节、风向进行风机间风速时空相关性分析,划分出风机轮毂高度风速高相关为典型特征的风机网格分类片区,采用卡尔曼滤波方法,通过直接和间接两种订正方案,分别进行风机片区风速订正。结果表明:风速高相关风机片区的划分,对于提高风电场风速预报及功率预测精度和准确率具有一定作用,利用风电场区测风塔梯度观测风速,对风机片区进行间接订正,可有效改善数值模式预报风速,15个片区类型下相关系数由0.18~0.72提高至0.67~0.91,误差绝对值由1.6~2.9 m·s-1降低至1.0~1.5 m·s-1。  相似文献   

基于实密度的卧式浪流轮机水槽实验研究分析     

王世明  任万超  田卡  吕超 《海洋技术学报》2015,34(1):89-93

实密度是影响轮机获能特性的关键因素之一。文中以卧式轮机实密度为基变量,以其获能系数为主要考察点,对3种实密度卧式轮机进行水槽实验方案设计和水动力性能研究。实验分别对水流流速、轮机旋转角速度、主轴转矩以及功率进行测量,并对其对主轴的扭矩、轮机的获能系数以及叶片的旋转特性进行定量分析,最终证实了该卧式轮机的单一运行特性。通过绘制基于实密度的轮机转矩—转角曲线、获能系数—尖速比曲线和轮机功率—尖速比曲线,阐明了实密度影响卧式轮机获能水动力性能的规律,即其获能系数和发电功率都随着工况速比呈先增后降趋势。实密度较低轮机因浪流流失而获得能量小,但实密度过高轮机会导致叶片间湍流涌动,加速叶片失速特性而影响轮机获能。这为卧式浪流轮机结构优化提供了可靠依据和借鉴。  相似文献   

潮流能水轮机仿真及尾流场分析     

侯二虎  杜敏  王兵振 《海洋工程》2015,33(5):118-124

为了研究潮流能水轮机尾流场的变化规律,本文在水平轴水轮机现有理论基础上,采用计算流体力学技术建立了数值模型,计算了水轮机的功率特性,进行了网格独立性验证,比较了模型中旋转区域不同对结果的影响。仿真结果与试验结果进行了对比分析,验证了数值模型的有效性。研究了全工况下尾流场速度衰减随尖速比和距离变化的规律,结果显示在小尖速比下尾流场速度恢复情况相对大尖速比下较好;靠近水轮机轮毂中心线位置处,衰减相对较大。研究建议水轮机在同等功率表现下尽量选择在小尖速比下工作,水轮机组在实际排列时避免采用成列布置,水轮机设计阶段应综合考虑功率特性和尾流场衰减。本文研究内容可以为潮流能水轮机的研究以及阵列式应用提供参考。  相似文献   

Experiment Study of Dynamics Response for Wind Turbine System of Floating Foundation   总被引：1，自引：1，他引：0  

唐友刚  宋凯  王宾 《海洋工程》2015,29(6):835-846

The floating foundation is designed to support a 1.5 MW wind turbine in 30 m water depth. With consideration of the viscous damping of foundation and heave plates, the amplitude-frequency response characteristics of the foundation are studied. By taking into account the elastic effect of blades and tower, the classic quasi-steady blade-element/momentum (BEM) theory is used to calculate the aerodynamic elastic loads. A coupled dynamic model of the turbine-foundation- mooring lines is established to calculate the motion response of floating foundation under Kaimal wind spectrum and regular wave by using the FAST codes. The model experiment is carried out to test damping characteristics and natural motion behaviors of the wind turbine system. The dynamics response is tested by considering only waves and the joint action of wind and waves. It is shown that the wind turbine system can avoid resonances under the action of wind and waves. In addition, the heave motion of the floating foundation is induced by waves and the surge motion is induced by wind. The action of wind and waves is of significance for pitch.  相似文献   

Damage Identification of A TLP Floating Wind Turbine by Meta-Heuristic Algorithms     

M. M. Ettefagh 《海洋工程》2015,29(6):891-902

Damage identification of the offshore floating wind turbine by vibration/dynamic signals is one of the important and new research fields in the Structural Health Monitoring (SHM). In this paper a new damage identification method is proposed based on meta-heuristic algorithms using the dynamic response of the TLP (Tension-Leg Platform) floating wind turbine structure. The Genetic Algorithms (GA), Artificial Immune System (AIS), Particle Swarm Optimization (PSO), and Artificial Bee Colony (ABC) are chosen for minimizing the object function, defined properly for damage identification purpose. In addition to studying the capability of mentioned algorithms in correctly identifying the damage, the effect of the response type on the results of identification is studied. Also, the results of proposed damage identification are investigated with considering possible uncertainties of the structure. Finally, for evaluating the proposed method in real condition, a 1/100 scaled experimental setup of TLP Floating Wind Turbine (TLPFWT) is provided in a laboratory scale and the proposed damage identification method is applied to the scaled turbine.  相似文献   

浮式风机极限载荷与疲劳载荷对比分析     

张友文  王迎光 《海洋工程》2015,33(3):57-62

根据IEC61400-3设定工况,采用NREL开发的5 MW风机基础模型,应用FAST,以Aero-Hydro-Servo-Elastic耦合仿真技术对风机进行研究。对时域仿真得到的短期载荷,应用分块极大值法联合Gumbel分布外推计算风机极限载荷;以雨流计数法、线性累积损伤理论和S-N曲线为理论基础应用MLife软件,计算风机疲劳载荷。对比分析不同工况下浮式风机、近海单桩风机和陆上风机的极限载荷与疲劳载荷,进而探讨影响浮式风机动态响应的因素。结果表明,对于陆上风机和近海单桩风机,风是其主要载荷来源;而波浪是浮式风机主要载荷来源。对风机进行设计要根据特定海域统计的海洋气候条件,避免风机及其支撑结构的固有频率与波浪频率近似而产生共振;风机制造装配在一定误差范围内,质量不平衡对风机载荷几乎没有影响。  相似文献   

Model testing and performance comparison of plastic and metal tidal turbine rotors     

《Applied Ocean Research》2015

Experimental model tests were conducted to predict the performance of two sets of metal and plastic bi-directional tidal turbine rotors. This test programme aims to provide reliable and accurate measurement data as references for developers, designers and researchers on both model and full scale. The data set presented in this paper makes available the detailed geometry and motion parameters that are valuable for numerical tools validation. A rotor testing apparatus that was built using an off-the-shelf K&R propeller dynamometer, its configuration, testing set-up, calibration of the apparatus and data acquisition are described. Comparison analysis between the metal and plastic rotors hydrodynamic performance in terms of torque, drag and derived power and drag coefficients are also presented. The results show a substantial decrease in maximum power performance for the plastic rotors – about 40% decrease at a tip speed ratio of around 3.0, compared with rigid metal rotors. The plastic rotors have also a much higher cut-in speed. It showed that materials for rotor models with low rigidity such as polyamide (nylon) produced by selective laser sintering (SLS) systems may substantially under-predict power generation capacity. As a result, they are considered unsuitable for rotor model performance evaluation.  相似文献   

一种加装稳定翼的海上风电负压桶型基础研究     

李炜 《海洋工程》2012,30(1):145-150

针对海上风电负压桶型基础,以提高桶基水平承载性能和降低结构动力响应为目的,提出了一种加装稳定翼的负压桶型基础型式。通过在桶身设置一组稳定翼,使得桶周土抗力得以充分利用。以单立柱负压桶基为例,建立桶土全实体有限元模型,进行了静力分析和包括模态分析、瞬态分析、谱分析在内的动力分析。结果表明:稳定翼的设置增强了桶基水平承载性能;水平位移和动力响应显著减小;结构低阶固有频率略有提高。  相似文献