Table of Contents
What is wireline logging?
Wireline logging is the process of using electric instruments to continuously measure the properties of a formation, in order to make decisions about drilling and production operations. Wireline logging is the measurement of downhole formation attributes using special tools or equipment lowered into the borehole.
What is PEX log?
Platform Express integrated wireline logging tool is half the length of conventional triple-combo logging but twice as fast. The combination of higher logging speeds, reduced set-up and calibration time, and faster turnaround for wellsite processing boosts logging efficiency and requires significantly less rig time.
What is open hole wireline logging?
Open-hole logging refers to logging operations that are performed on a well before the wellbore has been cased and cemented. In other words, the logging is done through the bare rock sides of the formation.
What are the differences between drillers log and wireline log?
Logging while drilling is the operations of collecting data in real time. On the other hand, the wireline logging service is the operation of collecting data, but after finishing drilling an interval, a section, or a well.
What are the wireline logging tools?
These include: 1) caliper logs, 2) directional logs, 3) dipmeter logs, 4) sidewall coring, and 5) formation testers.
What is triple combo log?
The triple combo is the standard set of measurements used in formation evaluation and wireline logging: gamma-ray, porosity, and resistivity. Simply put, the triple combo tells us about rocks, pores, and fluids.
What is quad combo log?
The quad-combo, which includes resistivity, bulk density/neutron porosity, sonic, and gamma ray measurements, provided the operator with information to evaluate the reservoir’s potential and lithology.
What is CDR log in drilling?
Logging While Drilling Induction Tools. Schlumberger introduced the compensated dual resistivity (CDR) tool which allowed log data to be transmitted up the wellbore by mud pulses. Storage devices at the bottom of the drillstring allow the driller to retrieve raw data when the bottom hole assembly (BHA) is pulled.
What is RXO in logging?
In the context of logging, Rxo is a shallow formation resistivity, usually of the flushed zone, from a very shallow reading device.
Is MWD and LWD the same?
The key difference between LWD and MWD tools is that LWD data are recorded into downhole memory and retrieved when the tools reach the surface, whereas MWD data are transmitted through the drilling fluid within the drill pipe by means of a modulated pressure wave (mud pulsing) at ~3 bits/s and monitored in real time.