Geophysical Logging and the Method Behind It

Always in high demand throughout the world, minerals are the true dream whenever any undertakes the act of geophysical logging.

With myriad applications, minerals are in high demand and are typically a rather high-value item, even before they are refined into products. This is because of many reasons. The first is that minerals, as well as most things which come from subterranean depths such as oil and gas – are difficult to find. The skill that goes into locating and extracting these materials cannot be understated, and a lot of the price these items command is linked to demand.

There is the product, too. Coveted minerals tend to have myriad practical applications – while most indeed think of highly processed minerals in display in a jewellers’ window – that is not all of the application of what comes from below.

Minerals are used for scientific purpose as well as industrial – and there due to properties unique to each type of mineral, they have a great value in the field of scientific investigation. For instance, the ruby is coveted for measuring instruments due to the fact it, as a material, displays properties perfectly suited to measurement robots.

Of course, there is also the aesthetic value of minerals when refined and crafted into products. These wonderful natural materials are sought after for their desirable and often beautiful aesthetics. Diamonds are the hardest of all and indeed, the hardest natural material in the world. Commonly used for extravagant rings and gifts, these crystals are often purchased for a high price and other similarly complex structures such as topaz and quartz are also deemed glamorous.

Of course, it cannot be unmentioned that synthetic diamonds have indeed been developed and are quite popular in jewellery, yet they do not command the price of natural diamonds, and natural by far outweighs the value of man-made.

To garner these sought after items, it’s necessary that any logging team understands the various principles of well logging and follows several procedures in order to conduct the task in an efficient and a safe manner.

Well Logging is the perfect technique for this – rather than blindly going in, wasting time, manpower, and money.

Whether you are implementing gamma ray, electric, well or any other form of logging, you need to understand the elements of the minerals that you are after, and make appropriate decisions with your method to ensure that you do not destroy the yield you are attempting to locate and extract.

Conductive minerals are primarily located thanks to resistivity measurements and therefore, are one of the simpler minerals to track down using well-logging approaches.

Whether you’re after graphite or galena, you need to know three simple things.

  • Firstly, that there is a consistency within the mass you’re studying. Separation of bodies of ore can result in inaccurate readings that make it difficult to ascertain measurements.
  • Secondly, the mass itself must be large enough to log – a small amount may not be worth the resources or incapable of being read at all.
  • Lastly, you must ensure that the ore body is too deep underground before logging as you may need to change your equipment.

Comparatively, resistive minerals have fewer guidelines to follow as there is purely the one but it is vital that it’s adhered to.  For an accurate log, the mass needs to be very close to the logging to enable resistivity and also large enough to create a result.

Gamma ray logging is altogether more straightforward with the radiation able to pick up minerals from a greater distance and quicker. However, the constraints of the hole cannot be too expansive as this will negate the radioactivity a little.

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