Wettability The tendency of one fluid to spread on or adhere to a solid surface in the presence of a second fluid. If two immiscible fluids/phases are placed in contact with each other and a solid phase one of the two is more attracted to the solid phase. The more strongly attracted is the wetting … Continue reading IOR Concepts
Tag: Reservoir
Micro-Resistivity
These logs are capable of detecting formations less than 1.0in. thick, if the mud cake is very thin. Micro-laterologs can be used in salt muds and high resistivities. Their response will be affected by mud cake greater than 3/8" thick. Typically used to measure Rxo and determine permeable beds by detecting mudcake. Limitations Shallow invasion … Continue reading Micro-Resistivity
Spontaneous Potential (SP)
Spontaneous Potential (SP) This is a record of the direct current voltage differences between the naturally occurring potential maintained by a movable electrode in the borehole and a fixed potential located at the surface. The potential is as a result in the difference between the salinity of the drilling and formation fluid. The SP log … Continue reading Spontaneous Potential (SP)
Petroleum Geology
Basics 3 basic layers that make up the earth; core, mantle and the crust. The crust is the most important and it is divided into two distinct types; Continental – 16-48km thick Oceanic – 8-11km thick Orogeny – when the crust is built layers fold over each other and are pushed upward. Weathering Physical – … Continue reading Petroleum Geology