Tuesday 30 September 2014

Information From MWD Drilling Software

By Karina Frost


Measurement While Drilling is abbreviated as MWD. It is used to take the measurement of the inclination angle against the vertical line through the process. MWD drilling software then takes up all these values.The oil well paths are plotted in 3-D using this information. Communication between the operator and the floor is crucial and is provided by this software.

The software transmits information on the direction the well is being drilled. Directional survey can be done by the software and sent in real time. Azimuth and the inclination angle of the drill hole are measured by the magnetometers and accelerometers in it. Immediately information on them has been measured it is transmitted to the surface for analysis

Analysis of data is done on the surface before calculation of the location of the wellbore after data transmission which takes data from 10m to 500m in intervals. This information is as crucial as it being prove enough that the company is not doing any operation outside its permitted site or circumference. It may not be used when creating vertical holes or near vertical direction because it is quite expensive.

Drilling has to be done is a specific direction or in a directional-drilling. The information that is obtained from the MWD tools guides the driller on steering the process in the direction to the target zone. Bent housing or bent subs aid in directional operations with the MDW providing toolface measurements from the downholde mud motors.

The software sends information about the mechanics of the drill bit. This kind of information include the downhole temperature, mud flow volume, smoothness of rotation, the drillstring speed of rotation, the weight as well as torque on the dril bit. This info will lead to more efficient operations. It also ensures that the tools used won't fail when drilling because they can be operated within their technical specifications. Geologists use this information to understand the formation of the zone being drilled.

MWD tools are capable of measuring the formation properties and send the data to drillers when drilling is ongoing. They use this information to perform geosteering to the target zone. The information varies from porosity, inclination at the bit, acoustic-caliper, density, and resistivity.

The MWD tool is fitted with gamma ray sensors on the inside which are used to measure the natural gamma rays occurring at the well. They are very compact and cheap and can take measurements of unmodified drill collars during the process. The lifespan of drill bits in greatly increased when using the software and costs of creating the hole reduced.

The data they get during the operations is either transmitted by the mud-pulse telemetry method and electromagnetic telemetry. In the mud-pulse telemetry method the mud valve downhole which restricts the flow of slurry creates pressure differences which are send to the surface as for analysis. It can either be positive, negative pulse/continuous wave.

MWD software analyzes voltage signals transmitted through electromagnetic telemetry method. These voltage signals are generated as a result of altered voltage differences in the lower and upper parts of the electrical insulator in the drillstring. Wires attached to the wellhead and the rod form the electrodes for information transmission.




About the Author:



No comments:

Post a Comment