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Density logging is a well logging tool that can provide a continuous record of a formation's bulk density along the length of a borehole. In geology, bulk density is a function of the density of the minerals forming a rock (i.e. matrix) and the fluid enclosed in the pore spaces. This is one of three well logging tools that are commonly used to ...
Upward Continuation in Schlumberger's Oilfield Glossary Downward Continuation in Schlumberger's Oilfield Glossary This article related to natural gas, petroleum or the petroleum industry is a stub .
Henri George Doll (13 August 1902 in Paris – 25 July 1991 in Montfort-l'Amaury, France) was a French-American scientist.. Biography. Doll was a leading figure in the development of oil well logging and a key technical leader of the Schlumberger oilfield services company.
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Mud cake (also mudcake) is the layer of particulates from drill mud coating (caking) the inside of a borehole after the suspension medium has seeped through a porous geological formation. [1] Similar to filter cake . Mud cake provides a physical barrier to prevent further penetration and loss of drilling fluid, as well a later loss of produced ...
Workover. A workover rig. The term workover is used to refer to any kind of oil well intervention involving invasive techniques, such as wireline, coiled tubing or snubbing. More specifically, a workover refers to the expensive process of pulling and replacing completion or production hardware in order to extend the life of the well. [1]
Connate fluids. In geology and sedimentology, connate fluids are liquids that were trapped in the pores of sedimentary rocks as they were deposited. These liquids are largely composed of water, but also contain many mineral components as ions in solution . As rocks are buried, they undergo lithification and the connate fluids are usually expelled.
A squeeze manifold is a compact arrangement of valves and pressure gauges that allows monitoring of the drill pipe and casing pressures throughout the job, and facilitates quick switching of the pumping pressure to either side while the fluid returning from the other side of well is directed to the mud pit or a disposal pit or tank.