Development of a Drilling Simulator to Achieve Drilling Optimization

Etaje, Darlington Christian

Development of a Drilling Simulator to Achieve Drilling Optimization

dc.contributor.advisor	Roman, Shor
dc.contributor.author	Etaje, Darlington Christian
dc.contributor.committeemember	Gates, Ian
dc.contributor.committeemember	Chen, Nancy
dc.contributor.committeemember	Park, Simon
dc.contributor.committeemember	Azadbakht, Saman
dc.date	2023-11
dc.date.accessioned	2023-08-24T16:41:42Z
dc.date.available	2023-08-24T16:41:42Z
dc.date.issued	2023-08
dc.description.abstract	In summary, drilling simulation, a set of physic-based models run through time or depth steps to mirror events in the drilling rig, is the backbone of all field testing of technologies or procedures. If a model has been validated using drilling simulation, the risk of wasted field trial is lowered significantly. This is why the formulation of models that make up drilling simulation is key and this is what this thesis has focused on. 20 functions were used to simulate the processes described in this research. Finite element formulation of space models linked with time-based models have been developed for the 2-node system in X (axial loading and axial torsion), Y (transverse bending of Z), and Z (transverse bending of Y) directions. Laplace transform was used to solve the time based partial differential equation paving way for the development of velocity, acceleration, force, and torque equations. Drill ahead modeling using build and walk relation to resultant forces was validated. Stick slip mitigation using the optimized RPM objective function was used to optimize the mechanical efficiency of drilling. Particle swarm optimization was the process used for optimization where each solution is considered a particle in search of the global minimum. An expression of the optimized RPM was developed and simulated with field data. Confined compressive strength of the field data was compared with the CCS obtained from the simulation but there was no perfect match yet. Further runs of the simulation would show more lessons as to how to improve the results. It can be concluded that the MSE minimization process should rather be called MSE optimization process as the decision to raise or lower MSE should be based on the data supplied to the particle swarm optimizer since the objective function is built with constraints to lower drill string vibrations. When tested with field data, the objective function and optimizer built in this research was found to increase MSE but lower the downhole stick slip index by 28 percent. The downhole stick slip index was below 0.5.
dc.identifier.citation	Etaje, D. C. (2023). Development of a drilling simulator to achieve drilling optimization (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.
dc.identifier.uri	https://hdl.handle.net/1880/116890
dc.identifier.uri	https://dx.doi.org/10.11575/PRISM/41732
dc.language.iso	en
dc.publisher.faculty	Graduate Studies
dc.publisher.institution	University of Calgary
dc.rights	University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subject	Drilling
dc.subject	Simulation
dc.subject	Finite Element
dc.subject	Particle Swarm Optimization
dc.subject.classification	Engineering--Petroleum
dc.title	Development of a Drilling Simulator to Achieve Drilling Optimization
dc.type	doctoral thesis
thesis.degree.discipline	Engineering – Chemical & Petroleum
thesis.degree.grantor	University of Calgary
thesis.degree.name	Doctor of Philosophy (PhD)
ucalgary.thesis.accesssetbystudent	I do not require a thesis withhold – my thesis will have open access and can be viewed and downloaded publicly as soon as possible.