The oil and gas industry uses a very important process known as wireline logging in order to obtain a continuous record of a formation of a rock. Wireline logging is performed through lowering a ‘logging tool’, or a string of one or more instruments, whereby it is place on the end of a wireline into an oil well that is then used to record petro physical properties using a variety of sensors.
The data is recorded at either surface (real time mode) or in the hole (memory mode) to an electronic data format, which then a printed or electronic presentation called a “well log” that is provided to the client, with a copy of the raw data.
Well logging operations can either be performed through drilling process, to provide real-time information, which leads to real time formation being penetrated via borehole, or one total depth and whole depth of the borehole can be logged.
North America has the highest current market for this service, which has meant that most of the world’s largest providers of this service are based there. In the US however, a level of maturity has been reached, whereby growths rates have slowed down, meaning other regions are displaying higher percentage annual growth within this industry. This is in part due to the development of technology and the ability to explore and identify more oil reserves across the globe.
Wireline services market can be broadly categorised into the following; well completion, well intervention and well logging, but also on the basis of technology used such as electric line and slick line. Widely used to adjust valves, reorder wellbore equipment and repair tubes within wellbore, slick line is a fantastic counterpart.
Other useful and interesting logging processes include the likes of borehole and slimhole logging, which are incredibly important within the industry.