A Flashcards
Mention 4 purpose of SP log in logging activity!
a. Detecting Impermeabel Layer/formation
b. Defining boundaries of formation
c. Calculate Rw formation
d. Shaliness
What is Secondary Migration of Hydrocarbon?
The further movement of the hydrocarbons into reservoir rock in a hydrocarbon trap or other area of accumulation
What is chronostratigraphy?
The element of stratigraphy that deals with the relative time relations and ages of rock bodies.
What is it called when you check an oil well by opening the well in a closed, static and stable state so it will continue to flow at a certain flow rate?
Pressure Drawdown Test
any chemical, physical, or biological change undergone by a sediment after its initial deposition and during and after its lithification, exclusive of surface alteration (weathering) and metamorphism is called a ……
diagenesis
What does EGS stands for?
Enhanced Geothermal System
- There are examples of wire line log analysis from Well Charlie and Echo which showing the value of resistivity (LLD / ILD and MSFL / MLL) Reservoir A and Reservoir B in the two wells are relatively small compared with its shale resistivity. Based on qualitative analysis of wire line log, it can be interpreted that the interval is just filled with water. However, if it viewed properly there is crossover between NPHI and RhoB log that shows the possibility of the presence of hydrocarbons. In the oil industry, this phenomenon is referred to as .
low resistivity pay zone
An arrangement of geophones, usually linear, the outputs of which are summed to form a single channel is
geophone array
The assembly of valves, spools, pressure gauges, and chokes that are fitted to the well head of the completed well is called a Christmast tree. Mention four parts of Christmas tree ?
Crown/swab valve, wing valve, upper master valve, lower master valve, choke, C-section of wellhead
Mention two types of artificial methods that best suited for large wells with PI!
ESP, Continuous Gas Lift
Mention at least 3 data we will get from pressure build up test?
Effective Permeability of Oil
Skin Factor
Flow Efficiency
Mention 4 parameters measured by Resistivity Log!
Rxo, Rt, Vsh, Rw
Mention at least 3 assumptions in deriving diffusivity equation?
Radial flow
Isothermal
Constant porosity
We can determine the thickness of the reservoir, including gross sand, net sand, net effective sand, and net pay. _____ is the net effective sand thickness and cutoff Sw.
Net pay
When well is placed in the center of the reservoir and the flow is radial flow. In well testing, when the derivative type curve value is 0.5 it will enter some region of flow. What is this flow region called?
Infinite acting
