Oil and gas lies beneath the earth’s surface, the experts cannot examine the rocks that it sits on personally. Consequently, they use wireline logging, as well as other strategies, to obtain measurements from beneath the surface. Wireline logging, also known as logging, measures properties such as conductivity and formation pressure, sonic properties, and wellbore dimensions, through electrical lines of wire. This is considered to be basic open hole logging system. The main purpose of wire logging is to help geologist in making real-time decisions about oil drilling operations. A wireline differs from other logs because it is a constant down-hole measurement, the way the tool is used by placing the sonde, which is located at the bottom of the wireline, into the desired depth and raising it back out the water. The measurements are taken on the way back up from the desired depth by trying to support the pressure that is on the line. As opposed to logging while drilling tools take measurements near bottom of the hole and recorded on the way down.
Once geologist have this information, which is presented on a graph, they can develop more efficient production plans. The logging instruments used for these jobs are normally based on electric, nuclear or acoustic measurements. They are all calibrated so gas and oil companies can have accurate reserve values. Although wireline logging is critical in the oil and gas industry, it alone is not capable of providing all the information needed to conduct a successful job. The wireline log is best used when it is paired with other analysis such as mudlings, measurements while drilling data, and production test. In order to achieve maximized proficiency in the oil and gas market, geologist and engineers need to continue to use this data as well as strengthen the capabilities of these tools. While the production and efficiency of these tools has increased tremendously there are improvements that can benefit this industry.
Cased-hole wireline logging was invented in 1927 by two gentlemen who were famously known as geophysics in France. Conrad and Marcel Schlumberger made history on September 5, 1927 when they paired with experimental physicist Henri Doll, in recording the first measurement. Eventually, after the great depression had passed, the brothers were able to bring their knowledge to the United States in September of 1934. The Schlumberger Well Surveying Corporation held their American companies offices in Houston, Texas. While Germany had control over France, they decided to move the main corporation from Paris to Houston, Texas.