Ron Francis

1664457162

SEISMIC CABLES

Seismic cables protect environments from property damage and save existence. They are most often used in earthquake and seismic event danger zones or in underground applications. Many applications that use seismic bracing cables must meet strict safety requirements, so a custom seismic bracing cable is sometimes mandatory. Many applications that use seismic cables must meet strict safety requirements. A custom seismic bracing cable is sometimes necessary. We are presenting a wide range of seismic cable that is available in various sizes, length and thickness. Seismic cables are manufactured by using ultra-modern technology and utmost grade material as per the set industry standards. Our offered cable is quality checked on various parameters before final finish. Cable bracing systems are already specified by designers and architects in many construction projects. Seismic cables are the perfect choice for retrofit projects where design flexibility is limited. These systems offer the best cost-saving and time-saving seismic cables.

What is GEEK

Buddha Community

Vaughn  Sauer

Vaughn Sauer

1625953500

Seismic Fault Prediction with Deep Learning

eismic image gives a structural snapshot of the Earth’s subsurface at a time. A sound wave is sent to the subsurface from a ‘source’, which travels through the Earth’s layer at different velocity and gets reflected, refracted or diffracted along its way. In seismic imaging, we record the waves that are reflected back from different geological layers and stack them to create a 2D or 3D image. Because different geological layers have different physical properties, at the boundary between layers, the waves are reflected due to density contrast. There are different kinds of waves, but in imaging we are mostly focused on P-waves (compressional waves). The cartoon below gives you an example of seismic acquisition and actual image after collecting all the waves.

So whose fault is it?

Faults are geological structures created by a combination of numerous physical processes such as pressures, gravity, plate tectonics etc. These are the cracks or planes along which block of rocks slips across. Faults comes in all kind of sizes, from few meters to miles. The _San Andreas Fault _is an example of very large scale strike-slip faulting (also called Transform Fault). There are three major types of faults as shown in below:

  • Significance of Fault Mapping in seismic data
  • Fault Mapping and Prediction
  • Data Exploration
  • Deep Convolution Network
  • Training Data
  • Model Training
  • Result

Summary

#python #seismic #machine-learning #deep-learning

Ron Francis

1664457162

SEISMIC CABLES

Seismic cables protect environments from property damage and save existence. They are most often used in earthquake and seismic event danger zones or in underground applications. Many applications that use seismic bracing cables must meet strict safety requirements, so a custom seismic bracing cable is sometimes mandatory. Many applications that use seismic cables must meet strict safety requirements. A custom seismic bracing cable is sometimes necessary. We are presenting a wide range of seismic cable that is available in various sizes, length and thickness. Seismic cables are manufactured by using ultra-modern technology and utmost grade material as per the set industry standards. Our offered cable is quality checked on various parameters before final finish. Cable bracing systems are already specified by designers and architects in many construction projects. Seismic cables are the perfect choice for retrofit projects where design flexibility is limited. These systems offer the best cost-saving and time-saving seismic cables.

Generating Synthetic Seismogram in Python

One of the most fundamental concepts in geophysics is convolution. Seismic data that we record on geophysical operations are the reflected energy from the Earth’s internal surfaces that have different physical rock properties from adjacent layers. In fact, seismic signature results from the convolution of reflectivity of layers with energy source wavelet.

Generating synthetic seismogram from well logs is a modeling process. We will convolve reflectivity series (derived from logs) with zero phase wavelet such as Ricker wavelet. We need seismograms to tie well data to seismic data for interpretation tasks.

In this paper, I will try to add some programing fun into the synthetic seismogram creation process. I really like python because of various libraries that can make the tasks much easier than other programming platforms.

I have uploaded a full jupyter notebook file and raw data in my GitHub account if you what to try it by yourself. We will deal with log data with las format. If you are unfamiliar with the procedure on how to read las files into python, please review my previous post.

Required steps to generate seismogram:

1- Data Preparation (Unit conversion and Sonic / Density Logs processing)

2- Time-Depth relationship construction

3- Acoustic Impedance(AI or Z) Calculation

4- Reflection Coefficient(Rc) calculation

5- Resampling to the time domain and Rc recalculation

6- Wavelet & Convolution

7- Visualization

1- Data Preparation

Adjusting Unit

After reading a well log file (las format) into python and looking at the log header, we need to convert the units of Density and Sonic logs to SI system because we need these two logs for impedance calculation. To calculate Acoustic Impedance, we need to have Sonic log (DT) in µs/m unit as well as density log (RHOB) in kg/m3. Looking at header: DT has us/ft unit and RHOB g/cm3.

w.data['DT'] = w.data['DT'] / 0.3048          #unit convert to µs/m
w.data['RHOB'] = w.data['RHOB'] * 1000        #unit convert to kg/m3

Despiking & Smoothing

Spikes are common on well logs, especially on sonic measurements. These spikes are not the true representative of rock properties variation through the well intervals and need to be eliminated.

#Sonic Despiking
dt = w.data['DT']
w.data['DT_DS'] = dt.despike(window_length=50, z=2)

#Density Despiking
den = w.data['RHOB']
w.data['RHOB_DS'] = den.despike(window_length=50, z=2)

We will input despiked data to be smoothed:

#Sonic Smoothing
dt_ds = w.data['DT_DS']
w.data['DT_DS_SM'] = dt_ds.smooth(window_length=10, samples=False)

#Density Smoothing
den_ds = w.data['RHOB_DS']
w.data['RHOB_DS_SM'] = den_ds.smooth(window_length=10, samples=False)

#data-science #seismic #convolution #python #geophysics #programming

SF Cable

SF Cable

1655448161

Buy DB9 Serial Cables, Custom DB9 Cable, DB-9 Serial Port Cables Onlin

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For High/Medium Voltage Power Cables, Use SpearHead’s Free Cable Sizin

 

In the market, a range of cables in different sizes are offered. However, you need an electrical cable size calculator to determine which size is best for your application. It aids in your understanding of the ideal fit size for your needs. It is computed using Australia standards. The KW. Cable Sizing Calculator Australia 230V and 415V Voltage Drop uses a power factor of 0.8.

Divide the voltage flowing through the cable by the desired current to determine the cable size. For instance, divide 150 by 30 if your wire has a voltage current of 150 volts and your aim is 30. You now have the necessary target resistance of 5. Calculator for Electrical Cable Size is useful.

Typically, 1.5mm or 1mm wires are utilised while looking for wiring for domestic lighting in your home. The majority of the time, 1 mm electrical cable sizing is sufficient. Only use 1.5 when the cable run is long and you need to deal with supply and demand changes as well as voltage drops.

When choosing a cable The electrical cable sizing chart aids in more informed decision-making. The size of cable needed for your application can be determined using these charts. For instance, if a small-sized cable is used, the excessive current flow may cause it to melt. Thus, a cable sizing chart is useful for estimating size and diameter. The higher the resistance to energy flow, the smaller the diameter.

The voltage rating for medium voltage cables ranges from 1KV to 100 VK. They have intricate connections that must be correctly cut. If they are not cut properly, they could explode and harm people or property. Due to the rise in demand, the idea of SpearHead Software Cable Sizing was established.

The Power Cable Size Calculator assists in evaluating the size of the cable needed to prevent any accidents since cables with varying levels of electrical resistance are used in various applications.

SpearHead Software provides you with the most straightforward method to determine the size that is acceptable for your application because the formula for calculating electrical estimating software is tiresome and complex. The Australia Standard for the Current Carrying Capacity of Single Core Armoured XLPE Insulated Copper Cable, Bs7671.