页岩气水平井产出剖面定量解释方法

涪陵页岩气田多采用多级压裂分段射孔方式完井,气藏开发与管理者迫切需要了解各层段的产出情况,产出剖面测试是获取各层段产出情况最为直接的方法.对于生产稳定的水平井,水平段可以划分为两个射孔簇之间的管流段以及射孔簇位置的射孔段.在全井所有的管流段、射孔段分别应用管流能量方程、射孔簇流体流入能量守恒方程,从而建立全井的产出剖面的解释模型.根据某页岩气井的沿水平段所测温度、压力等数据,选择相应的地质参数、井眼轨迹等,应用全井的产出剖面的解释模型,通过调用MATLAB的lsqnonlin函数,求解模型方程组,实例计算结果显示能够满足工程应用的要求.可见利用温压测试可实现水平井产出剖面的定量计算.     

Information Fusion of Online Oil Monitoring System Using Multiple Sensors

Machine lubrication contains abundant information on the equipment operation. Nowadays, most measuring methods are based on offline sampling or on online measuring with a single sensor. An online oil monitoring system with multiple sensors was designed. The measurement data was processed with a fuzzy intelligence system. Information from integrated sensors in an oil online monitoring system was evaluated using fuzzy logic. The analyses show that the multiple sensors evaluation results are more reliable than online monitoring systems with single sensors.     

Influence Factors of Fractal Characterization of Reciprocating Sliding Wear Surfaces

The principal purpose of this paper is to investigate influence factors of fractal characterization of reciprocating sliding wear surfaces. The wear testing was completed to simulate the real running condition of the diesel engine 8NVD48A-2U. The test results of wear surface morphology dimension characterization show that wear surface profiles have statistical self-affine fractal characteristics. In general, there are no effects of the profilometer sampling spacing and sampling length and evaluation length on the fractal dimensions of the surfaces. However, if the evaluation length is too short, the structure function logarithm of the surface profile is scattered. The sampling length acting as a filter is an important part of the fractal dimension measurement. If the sampling length is too short, the evaluation of the fractal dimension will have a larger standard deviation. The continuous wavelet transform can be used to improve surface profile dimension characterization.     

弹性金属塑料磨损表面的分形特性研究

通过对完成磨损试验后的弹性金属塑料（EMP）试样表面轮廓的测量与计算,获得EMP材料的磨损表面轮廓具有分形特性,通过比较分形维数的各种计算方法,推荐结构函数法为EMP材料磨损表面的轮廓进行分形维数计算的优选方法,并计算出了该材料在本研究条件下稳定磨损状态时的分形维数。