Oilfield Salary Survey and Comparison Study Based on Q3 2014

We’ve collected salary information from the most trusted oilfield website, rigzone.com, about salary and compensation for Q3 2014. At this time, we have the comparison between Q1 salary and Q3 salary.

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Oilfield Salary Based On Geographical Locations Based on Q3 2014 Data

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Determine Bottom Hole Pressure from Wellhead Pressure in a Dry Gas Well

Gas behaves differently from fluid therefore you cannot use a simple hydrostatic formula to determine reservoir pressure. Gas is compressible but fluid is incompressible.

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The formula to determine the bottom hole pressure of dry gas well is shown below;

equation 1

 

Where; Pbh = bottom hole pressure in psia (absolute pressure)

Pwh = wellhead pressure in psia (absolute pressure)

H = true vertical depth of the well

Sg = specific gravity of gas

R = 53.36 ft-lb/lb-R (gas constant for API standard condition air)

Tav = average temperature in Rankin (Rankin = Fahrenheit + 460) Continue reading

Magnetic and Gravity Toolface and How To Interpret The Meaning For Directional Drilling

Magnetic and gravity tooสface are terms in directional drilling world to describe the direction of the well. They are different in meaning and application therefore this article will teach you about these terminologies and how to read it.

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Magnetic Toolface
The magnetic toolface is an angle projection onto the horizontal plane between the tool face and magnetic north. Typically, directional tools use the magnetic tool face when the inclination is less than 5 degree. The Figure 1 demonstrates that the mud motor is lined up to kick off at 30 degree azimuth magnetic.

Figure 1 - Magnetic Toolface
Figure 1 – Magnetic Toolface Continue reading