Depth Conversion: Why we need it

Depth conversion and seismic inversion can take a very long time and it takes a great deal of precise measuring to get it exactly right. Depth conversion is used when measuring the depth of the earth’s surface and how easy it would be to excavate. This is typically used when needing to drill far down, this is usually used in the oil and gas industry. Depth of the earth’s surfaced is measured by using time and soundwaves. This is done by seeing how long it takes for a sound to travel from its source to reflectors and then when bounced back how long it takes for the receivers along the ground to pick it up.

Using this information you can measure the depth of the surface, however, this alone will not give you an accurate reading and it can even be impossible due to the varying nature of the rocks that form the earth. A rocks velocity can distort the depth and shape of a surface, and can eliminate areas which you may have once thought were a possibility.

Rock velocity is very important when it comes to judging how easy or hard it is to drill and it is determined by how fast or slow a rock is. The slower the rock the more porous it is and easier to drill. Using a geological hammer the speed of a rock can be determined. Fast rocks go “ding” and slow rocks “thud” or “squelch”.

There is no single methodology when it comes to depth conversion though and all cases differ. Since seismic and geologic control varies in quantity and quality with each project, an effective depth conversion approach must be used. Depth conversion may also need to take into consideration the area’s history and other poorly positioned wells before jumping right in and drilling.

Many geoscientists and oil and gas industry experts use software that specialises in depth conversion and seismic inversion, to achieve quick and effective results with techniques that determine relative impedance and absolute acoustic impedance from seismic data.

Petrel and IHS Kingdom are two of the most common software’s that are used in depth conversion but you may want to think about getting Equipoise Softwares Velit plug in which has added functionality, improves workflow, and is much more efficient with a reduced margin for error. This software produces a slicker workflow experience and is head and shoulders above its competition. Velit even makes the most complicated data easy to transform into real and working best case models without any added frustration and over complication. The software is regularly updated, so as soon as there is something new to hit the market you will be the first ones to take the full benefit of it. They are continually future proofing your depth conversion experience so that you can get data that is as accurate as possible.