Engineering topics
Publications and source records attributed to Hakala, Alexandra.
This is the poster presentation prepared for 2024 Geothermal Rising Conference, October 27-30, 2024, Waikoloa, HI. The poster is part of the LDRD project CS-GE^2 to demonstrate the multiple-tier fracture imaging analysis for geothermal reservoir applications.
Poster presented at the 17th International Conference on Greenhouse Gas Control Technologies GHGT-17 held in Calgary, Canada, October 20-24, 2024. In this poster, we present innovative technologies to image key features, including CO₂-stimulated fracture imaging, CO₂ fluid sweep imaging and heat transfer and exchange imaging by leveraging multiple datasets and applying advanced AI/ML, multi-level data analytics, and data/information fusion to better understand the geothermal reservoir for enhanced recovery.
This is the conference paper accompanying a poster presentation at the 17th International Conference on Greenhouse Gas Control Technologies GHGT-17 held in Calgary, Canada, October 20-24, 2024. In this paper, we present innovative technologies to image key features, including CO₂-stimulated fracture imaging, CO₂ fluid sweep imaging and heat transfer and exchange imaging by leveraging multiple datasets and applying advanced AI/ML, multi-level data analytics, and data/information fusion to better understand the geothermal reservoir for enhanced recovery.
2023 Global Energy Meet, Boston, MA, March 6-10, 2023
PIOGA Tech Water & Waste Management Training, Canonsburg, PA, October 26, 2022
Resource Sustainability Project Review Meeting, Pittsburgh, PA, October 25-27, 2022
2022 Carbon Management Project Review Meeting, Pittsburgh, PA, August 15-19, 2022
2022 URTeC, Houston, TX, June 20-22, 2022
Conference on Innovations in Climate Resilience Conference, Virtual, March 29-30, 2022
Poster presented at the AGU 2021 Fall Meeting, Virtual, December 13-17, 2021.
Slides from seminar to the Texas Water Energy Institute on July 30, 2021
A standard method in unconventional oil and gas production is the process of hydraulic fracturing followed by a shut-in period, during which the fracture fluid remains pressurized in the reservoir for up to three weeks before production begins. Despite this widely used process, very little is known about what occurs in the reservoir during this shut-in process. In order to properly delineate potential reservoir reactions that may occur during shut-in that would lead to corrosion and scaling events, experiments were conducted in high pressure, high temperature reactors to simulate conditions of the Wolfcamp Formation in the Delaware Basin. Experimental design allowed the assessment of the effect of proppant, microbiology, and time on the mineralogy and fluid chemistry in the reservoir. Results suggest the biggest impact on fluid chemistry and shale mineralogy during shut-in is time. Analyses demonstrate dissolution of the shale material, with maximum dissolved ions occurring after 7 days of the shut-in period. After 21 days, results suggest precipitation occurs. The Delaware Basin is demonstrated to be high in sulfate content, which further increases in the fluid due to dissolution reactions during shut-in. The pressure vessel experiments suggest there was no significant contribution to reactions from microbiology during the shut-in period. Furthermore, early production samples demonstrate a significant selection of the microorganism Caminicella, a genus of which has previously been correlated to corrosion and sulfide production. Results suggest shut-in conditions may provide high sulfate concentrations that could later be utilized by a shifted microbial community to drive potential well infrastructure failure. This is the first study to incorporate microbiology, mineralogy, and fluid chemistry to investigate the fundamental geochemical reactions that occur during shut-in and early phase production of the Delaware Downloaded from http://onepetro.org/URTECONF/proceedings-pdf/21URTC/2-21URTC/D021S032R001/2477425/urtec-2021-5219-ms.pdf/1 by Carol Worster on 28 February 2022 Basin. Results from this study can complement observations from the Hydraulic Fracture Test Site 2 observations
This report discusses the results of baseline geochemical data from a carbon dioxide (CO 2 ) enhanced oil recovery (EOR) field in the Permian Basin’s Central Basin Platform. This report focuses on understanding the variability in geochemistry during normal oil field practices, including the transition from water flooding to a water-alternating-gas (WAG) technique. The primary objectives of this study were to focus on 1) determining the best general geochemical parameters to identify produced water intrusion into overlying groundwaters, 2) observing if there was any intrusion during the sampling period, and 3) identifying changes in produced water following CO 2 injection.
Geochemistry of produced water (PW) from different conventional and unconventional formations with varying lithology, depositional environment, and hydrogeological history were analyzed to understand the major controls on PW quality.
Presented by LRST at the Carnegie Mellon University - Environmental Engineering, Sustainability, and Science Seminar, 9/3
Presetned by LRST at URTeC Virtual Conference, 7/20