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Articles 1 - 10 of 10
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A Large Scale Network Model To Obtain Interwell Formation Characteristics, Seyedmohammadamin Gherabati
A Large Scale Network Model To Obtain Interwell Formation Characteristics, Seyedmohammadamin Gherabati
LSU Doctoral Dissertations
Limited data availability and poor data quality make it difficult to characterize many reservoirs. For reservoirs that have undergone waterflooding, production and injection data are a reliable source of information from which injector-to-producer connections can be inferred. In this research, we use well locations, injection and production rate data and well fractional flow values to develop a reservoir-scale network model. A Voronoi mesh divides the reservoir into a number of node volumes each of which contains a well. Bonds connect each of the nodes with conductance values that must be inferred from the rate data. An inverse problem is formulated …
An Experimental And Computational Investigation Of Rotating Flexible Shaft System Dynamics In Rotary Drilling Assemblies For Down Hole Drilling Vibration Mitigation, Richard Duff
LSU Doctoral Dissertations
Rotary drilling system vibration has long been associated with damaging the bit, the bottom hole assembly (BHA) and drill string. Vibration has been traditionally measured in the bottom hole assembly, and been closely associated with the resonant behaviors.
This research study proposes an improved physical laboratory model to explore the dynamic behaviors associated with vibration. This model includes contact with the borehole wall allowing a range of stabilization geometries while removing bit-formation interaction effects. The results of exercising the model help develop new insights into both vibration measurement diagnostics and mitigation strategy execution.
Presented here is a review of other …
Experimental And Modeling Study Of Foam Flow In Pipes With Two Foam-Flow Regimes, Ali Reza Edrisi
Experimental And Modeling Study Of Foam Flow In Pipes With Two Foam-Flow Regimes, Ali Reza Edrisi
LSU Doctoral Dissertations
The use of foams can be found abundantly in many applications in a wide range of industries, including oil and gas industry. Although understanding foam flow behavior is crucial for the optimization of such applications, the complex flow behavior of foams has been a major challenge. Recent experimental studies with surfactant foams presented a new way to characterize foam flow characteristics by using two flow regimes: the low-quality regime showing either plug-flow or segregated-flow pattern, and the high-quality regime showing slug-flow pattern. This study consists of three main components: (1) experimental investigation of foam rheology in pipes; (2) building up …
Evaluation Of Gas-Assisted Gravity Drainage Eor Process Applicability In A Louisiana Oil Field Through Experiments And Reservoir Simulation, Wagirin Ruiz Paidin
Evaluation Of Gas-Assisted Gravity Drainage Eor Process Applicability In A Louisiana Oil Field Through Experiments And Reservoir Simulation, Wagirin Ruiz Paidin
LSU Doctoral Dissertations
The Gas-Assisted Gravity Drainage (GAGD) process was developed as an alternative to conventional gas injection enhanced oil recovery (EOR) processes, which suffer from their inherent weakness of combating gravity segregation. The GAGD process, however, is aimed at taking advantage of this phenomenon and consists of using horizontal producers near the bottom of the payzone while injecting gas using vertical injection wells. It is hypothesized that the injected gas will rise to the top, thereby forming a gas cap while displacing reservoir brine/oil downward towards the producers. In this study, a single-well alternative to the multi-well GAGD process was investigated to …
A Feasibility Study Of Multi-Functional Wells For Water Coning Control And Disposal, Lu Jin
A Feasibility Study Of Multi-Functional Wells For Water Coning Control And Disposal, Lu Jin
LSU Doctoral Dissertations
Although water coning is well understood, it is difficult to control in field operations resulting in low recovery and large volumes of waste produced water. A solution - proposed here - is a multi-functional well with the in-situ bottom water drainage and injection installations - Downhole Water Loop (DWL). Theoretically, DWL greatly improves well performance (for example, a two-fold increase of DWL well’s water drainage rate would increase the critical (water-free) oil rate by 80%). However, DWL has practical limitations that must be quantified for actual well design. The objective of this work is to: (1) find maximum water drainage …
Modeling Foam Delivery Mechanisms In Deep Vadose-Zone Remediation Using Method Of Characteristics (Moc), Alireza Roostapour
Modeling Foam Delivery Mechanisms In Deep Vadose-Zone Remediation Using Method Of Characteristics (Moc), Alireza Roostapour
LSU Doctoral Dissertations
This study investigates foam delivery mechanisms in vadose-zone remediation by using Method of Characteristics (MoC). In such applications, dry foams are introduced into a porous medium which is initially at low saturation of water (Sw) containing pollutants such as metals and radionuclides. For vadose-zone remediation processes to be successful, the injected aqueous phase should carry chemicals to react with pollutants and precipitate them for immobilization and stabilization purposes. Typical remediation techniques such as water and surfactant injections are not applicable, because of the concerns about downward migration. As a result, understanding foam flow mechanism in-situ is key to the optimal …
Analytical Modeling And Diagnosis Of Penetration Rate Performance Of Pdc Bits, Reza Rahmani
Analytical Modeling And Diagnosis Of Penetration Rate Performance Of Pdc Bits, Reza Rahmani
LSU Doctoral Dissertations
The high cost of drilling deep (15000+ ft) wells, due to slow rate of penetration (ROP) at depth, has severely limited the utilization and economic significance of deep hydrocarbon resources. The overall objective of this study was to obtain a better understanding of the major cause(s) of slow ROP in deep drilling. An analysis of field data demonstrated the impact of the problem and identified shale and limestone as the primary lithologies where slow ROP occurs at depth. Previous researchers have concluded that interactions between rock, drilling fluid, cuttings, and the bit control ROP. More specifically, several researchers have concluded …
Development Of A Framework For Scaling Surfactant Enhanced Co₂ Flooding From Laboratory Scale To Field Implementation, Gbolahan I. Afonja
Development Of A Framework For Scaling Surfactant Enhanced Co₂ Flooding From Laboratory Scale To Field Implementation, Gbolahan I. Afonja
LSU Doctoral Dissertations
The efficiency of the use of CO2 as a displacement fluid in oil recovery is hampered by the existence of an unfavorable mobility ratio that is caused by the large difference in viscosity between the injected fluid (CO2) and the reservoir fluids. This viscosity contrast results in early CO2 breakthrough, viscous fingering, gas channeling, and consequently, the inability of CO2 to effectively contact much of the reservoir and the oil it contains. Improvement of sweep efficiency and mobility control in CO2 injection require solutions to these problems. The use of surfactants and other chemical means for mobility control has been …
Multi-Scale Modeling Of Inertial Flows Through Propped Fractures, Ali Takbiri Borujeni
Multi-Scale Modeling Of Inertial Flows Through Propped Fractures, Ali Takbiri Borujeni
LSU Doctoral Dissertations
Non-Darcy flows are expected to be ubiquitous in near wellbore regions, completions, and in hydraulic fractures of high productivity gas wells. Further, the prevailing dynamic effective stress in the near wellbore region is expected to be an influencing factor for the completion conductivity and non-Darcy flow behavior in it. In other words, the properties (fracture permeability and β-factor) can vary with the time and location in the reservoir (especially in regions close to the wellbore). Using constant values based on empirical correlations for reservoirs/completions properties can lead to erroneous cumulative productivity predictions. With the recent advances in the imaging technology, …
Emergence Of Delamination Fractures Around Casing And Its Stability, Wei Wang
Emergence Of Delamination Fractures Around Casing And Its Stability, Wei Wang
LSU Doctoral Dissertations
The cement sheath failures and nearby wellbore failures may lead to upward flow of drilling fluid or formation fluid, which may have significantly adverse consequences like loss of reserve and environmental hazards. In order to maintain wellbore integrity in the long term, it is expedient to examine the causes of failures around the wellbore and propose suitable numerical models to predict annulus cracks around the casing. The complex failure behavior of cement/rock interfaces observed in the laboratory experiments does not look like the behavior of linear or simple nonlinear mechanical interfaces. Cohesive zone method (CZM) with BK-form bilinear traction separation …