Oilfield Salary Survey as of Q1 2014

by DrillingFormulas.Com on April 19, 2014

We’ve collected data from internet and summarized into simply formats for you to see oilfield salary in 2014. You will get an idea how much personnel working in the upstream industry make. All information used in this article is as of Q1 2014.

Oilfield Salary Based On Geological Locations

Africa Average Income = 105,568 USD/year
Australia & Oceania Average Income = 104,787 USD/year
Central Asia Average Income = 79,188 USD/year
Europe Average Income = 116,899 USD/year
Far East Average Income = 100,337 USD/year
Middle East Average Income = 79,813 USD/year
North America Average Income = 90,693 USD/year
South America Average Income = 88,297 USD/year
Southern Asia Average Income = 72,023 USD/year
The chart below demonstrates overall income based on geological information.

Figure 1 – Average Income (USD/Yr) Based on Geological Area as of Q1 2014

Oilfield Salary Trend from 2011 – 2014 Based on Geological Area

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Coring Cost Per Footage Drilled

by DrillingFormulas.Com on April 16, 2014

Coring is a special process to recover wellbore rock in the well.

Figure 1 - Core from the well. Credit – Wikipedia
Figure 1 - Core from the well. Credit – Wikipedia

This article will demonstrate how to calculate coring cost per footage recovered.


 Coring cost per footage recovered is expressed below;

coring cost per foot formula

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Basic Understanding of Sub Sea BOP VDO Training

by DrillingFormulas.Com on April 11, 2014

Sub Sea BOP is one of the most critical well control equipment in deep water drilling and it is a good topic for everybody working on the rig to learn.


Today, we would like to share a valuable VDO training regarding the basic of sub sea BOP. Additionally, we provides learner full VDO transcript to accelerate your learning curve.

Basic Understanding of Sub Sea BOP VDO Transcript

Subsea BOP equipment is similar to a surface stack. There are however some very important differences. This section discusses these differences.

Subsea stacks attached to the well head on the seafloor meanwhile the rig floats on the water hundreds of thousands of feet or meters above. Major parts include;

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Basic Understanding of Hydraulic Fracturing

by DrillingFormulas.Com on April 7, 2014

Geologists have known for years that substantial deposits of oil and natural gas are trapped in deep shale formations. These shale reservoirs were created tens of millions of years ago. Around the world today with modern and horizontal drilling techniques and hydraulic fracturing, the trapped oil and natural gas in these shale reservoirs is being safely and efficiently produced, gathered and distributed to customers.


Let’s look at a drilling and completion process of a typical oil and natural gas well. Shale reservoirs are usually one mile or more below the surface.  Well below any underground source of drinking water, which is typically no more than 300-1000 feet below the surface(Figure 1)

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Shale Gas Rig On Fire

by DrillingFormulas.Com on March 31, 2014

This is information which I got from my friends and I would like to share with you in order to emphasize the important of well control. I am not sure about the rig name. See photos and details below;

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Volume of Cutting Generated While Drilling

by DrillingFormulas.Com on March 30, 2014

While drilling, cuttings are generated every footage drilled and this topic will demonstrate how to determine volume of cutting entering into the wellbore.

Figure 1 - Cutting Generated While Drilling

Figure 1 - Cutting Generated While Drilling

 The following formula is used to calculate cutting volume generated while drilling;

vc - bbl per hour


Vc is volume of cutting in bbl/hr.

Ø is formation porosity (%).

D is wellbore diameter in inch.

ROP is rate of penetration in feet per hour.

Vc can be presented in several unit as follows;

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The Halliburton Redbook (Figure 1) is a very useful for oilfield people because it contains a lot of useful information as tubular/drill pipe data, cementing information, some oilfield calculation, etc.

Halliburton Red Book

Figure 1 – Halliburton Red Book

Nowadays, you can have another option to have this book by installing the Halliburton eRedBook® Mobile (Figure 2) in your smart phone or tablet.  It will make your life a lot easier.

 Halliburton eRedBook

Figure 2 – Halliburton eRedBook® Mobile


What can Halliburton eRedBook® Mobile help you?

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Buoyancy Factor with Two Different Fluid Weights in The Well

by DrillingFormulas.Com on March 17, 2014

Buoyancy Factor is the factor that is used to compensate loss of weight due to immersion in drilling fluid and you can find more information from this article > buoyancy factor calculation .  In that article, it demonstrates the buoyancy formula only for one fluid in the wellbore. However, this time, we will have the details about buoyancy factor when inside and outside fluid are different.


Buoyancy factor with different fluid inside and outside of tubular is listed below;

equation 1


Ao is an external area of the component.

Ai is an internal area of the component.

ρo is fluid density in the annulus at the component depth in the wellbore.

ρi is fluid density in the component depth in the wellbore.

ρs is steel weight density. Steel density is 65.4 ppg.

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How Does Deep Water Drilling Work

by DrillingFormulas.Com on March 13, 2014

Nowadays deep water drilling is one of vital players for oil and gas exploration and production industry and there are many people who would like to know how deep water drilling works. We’ve found one excellent VDO demonstrates the deep water drilling process in a simple way. This VDO will give you clearer picture about the topic and we also add full VDO transcript in order to help more people understand the content clearly. We wish you would enjoy learning from this VDO and please feel free to give us feedback : )

Full VDO Transcript - How Does Deep Water Drilling Work


Credit: Image from Wikipeida

How does the deep sea drilling vessel Chikyu drill into the sea floor? When the vessel arrives at the drilling site it receives a satellite signal that helps the vessel moves into the exact position required. The vessel has six propellers that rotate a full 360 degrees and keep the vessel in one position preventing it from drifting due to the wind, waves or sea current.

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Maximum ROP Before Fracture Formation

by DrillingFormulas.Com on March 11, 2014

In this topic, we will apply the effective mud density formula to determine maximum ROP before fracturing formation.

Figure 1 - Max ROP before Fracturing FormationFigure 1 – Max ROP before Fracturing Formation


These two equations that will be used to determine the maximum ROP are listed below;

Effective mud density due to cuttings in the hole can be determined by the empirical equation below;

equation 1


ρeff is effective mud density in ppg.

ρm is mud density in ppg.

Q is flow rate in gpm.

ROP is rate of penetration in fph.

db is wellbore diameter or bit diameter in inch.

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