A Simple Guide To Depth Conversion

Depth conversion is the act of measuring an acoustic soundwave and the time it takes for the wave to travel to another marked asset to determine the depth of the earth’s surface. The process is rather important and can sound confusing, sometimes it can be, but essentially the earth isn’t just made up of one type of rock.

You’ve probably taken a stroll along the beach and gathered a few rocks and noticed that they all are different, and they have multiple lines on them. These lines indicate different layers that make up the rocks entirety and show how exactly they were formed. Now imagine this on a much larger scale, with the earth as a huge rock.

The earth itself is made up of multiple components and multiple layers of different types of rock, all varying in thickness and form. You may have also noticed whilst strolling along the beach that some rocks are softer or more porous than others, with some even giving off a chalky like substance when touched, whereas some are much harder and when thrown keep their form without breaking. That is simply because they are two different types of rock.

There are in fact thousands of different types of rock out there including in the earth’s surface. That is when depth conversion comes into play. When we decide to dig into the earth’s surface, we don’t fully know what we are going to get or whether we are going to be able to dig down further unless exploration into the different rock types has been taken out beforehand.

Determining Depth Conversion

You’re probably thinking what has any of this got to do with Depth Conversion? Well a lot actually. Depth is calculated using sound waves. Have you been in a cave and heard to voice echo back to you. Essentially, the deeper the cave the longer you’re going to hear the echo of your voice and for.

This type of method is used when determining depth conversion. Sound is bounced off of rocks to see how the soundwaves come back to determine the rocks velocity below the earth. Different rock types require different equipment depending on how soft or hard they are so depth conversion isn’t just about measuring soundwaves.

The deeper you are looking to go the more you will see varying rock types. You may have even seen a cross section of the earth in your Geography lessons at some point in school. You may remember seeing a multicoloured diagram with lots of different layers. These layers represent all different types of rock that can be found below the surface.

Depth conversion software can go a long way in helping ascertain types of rock and depth of them from their wavelengths to create a three-dimensional model, called a velocity model.

The process itself may not be necessarily exact but there are some depth conversion plug ins for software such as Petrel or IHS Kingdom which is designed to eliminate any errors and greatly reduce uncertainty.