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Well logging, also known as borehole logging is the practice of making a detailed record (a well log) of the geologic formations penetrated by a borehole.The log may be based either on visual inspection of samples brought to the surface (geological logs) or on physical measurements made by instruments lowered into the hole (geophysical logs).
Wireline truck rigged up to a drilling rig in Canada. In the oil and gas industry, the term wireline usually refers to the use of multi-conductor, single conductor or slickline cable, or "wireline", as a conveyance for the acquisition of subsurface petrophysical and geophysical data and the delivery of well construction services such as pipe recovery, perforating, plug setting and well ...
Gearhart Industries, The GO Company (formerly GO Oil Well Services, Gearhart-Owen Industries) was an oil well service company founded by Marvin Gearhart and Harrold Owen in 1955 and based in Fort Worth, Texas, United States. It provided well logging and well perforating services to both domestic and international customers.
The well logs are obtained by lowering the measuring tools on a wireline (cable) into the well (borehole). [1] The integral parts of wireline logging operations are quality assurance and quality control procedures. Quality control is the “process that defines how well the solution for a specific problem is known”. [2]
A drilling rig is used to create a borehole or well (also called a wellbore) in the earth's sub-surface, for example in order to extract natural resources such as gas or oil. During such drilling, data is acquired from the drilling rig sensors for a range of purposes such as: decision-support to monitor and manage the smooth operation of ...
Its main mission is to conduct logging operations in vertical and horizontal wells. BJSP: A joint venture founded in 1986 in collaboration with BJ Services, an international company based in the United States. This subsidiary primarily focuses on cementing, stimulation, and coiled tubing.
Logging while drilling (LWD) is a technique of conveying well logging tools into the well borehole downhole as part of the bottom hole assembly (BHA).. Although the terms Measurement while drilling (MWD) and LWD are related, within the context of this section, the term MWD refers to directional-drilling measurements, e.g., for decision support for the smooth operation of the drilling, while ...
Well logging operations can either be performed during the drilling process (see Logging While Drilling), to provide real-time information about the formations being penetrated by the borehole, or once the well has reached Total Depth and the whole depth of the borehole can be logged. Real-time data is recorded directly against measured cable ...