With the deepening of petroleum exploration in China, unconventional hydrocarbon
reservoirs have gradually become the focus of hydrocarbon exploration. Because tight …

Absorption attenuation caused by the fluid is an essential indicator for reservoir delineation.
The attenuation gradient estimation method related to time-frequency (TF) decomposition …

In this paper, we proposed a sparse time-frequency analysis method based on the l 1-l 2
norm to improve the accuracy of the time-frequency analysis. To enhance the resolution of …

摘要随着我国石油勘探程度的不断加深, 非常规油气藏逐步成为了油气勘探的重点.
由于致密砂岩具有低孔, 低渗, 非均质性**等特性, 因此迫切需要高精度时频分析后处理方法对该 …

The swirl flowmeter is widely used in the wellhead measurement of low-permeability gas
fields. However, the liquid loading in the measured wet gas will influence the precessing …

摘要本研究提出一种基于犾1 犾2 范数的稀疏约束类时频分析方法, 以提高信号时频分析的
精度. 稀疏约束类时频分析方法通过窗口类时频分析的逆变换构造反演方程 …

Time-frequency analysis is one of the important methods to study thin layer. Time-frequency
analysis technology studies thin layer structure according to the time-frequency variation law …

High-frequency energy suffers remarkable attenuation when seismic waves travel through
reservoirs. It is possible to reflect the distribution of subsurface reservoirs by computing the …

In this paper, the synchronous squeezing wavelet transform (SSWT) is used to process the
conventional logging curve, and the spectral characteristics of logging signal are obtained …

针对雷达回波信号能量弱, 信噪比低, 难以获取高质量中频信号的频域特征,
从而导致测量误差较大的问题, 提出了同步挤压小波变换(SST) 结合中值滤波的信号时频分析 …