In this way, the average write speed of SSD is increased.

Study on injection rate of third level formation with polymer flooding in Daqing Oilfield.;

Selection of the rational injection rate for reservoir with polymer flooding;

This paper uses reservoir numerical simulation method to study the effect of injection rate on the displacement efficiency of polymer flooding and analyzes the reason of the effect.

A new method of average velocity extraction and its application;

The time-depth conversion method in common use in coalfield 3D seismic prospecting is: Firstly use borehole site target layer plumbing depth divide by half of target layer reflection time,calculating the each borehole coal seam average velocity,and then using interpolation method plotting out velocity distribution plan of surveying area.

There are some errors between mean velocity of format io ns obtained from sonic logging compared to VSP logging,which are mainly resulte d from cumulative time errors in sonic logging,and closely related to well cond ition,wellbore interval and its formation.

Based on analyzing its principle,we studied the key points of making synthetic seismogram such as polarity determination of seismic section,accurate mean velocity selection,exact collection of reflection coefficient and accurate estimation of wavelet.

It is very important to be able to simply and accurately calculate the mean velocity of thin viscous debris flows.