Shale Pore Architecture Characterization Via TD-NMR and Gas Adsorption

Download or read book Shale Pore Architecture Characterization Via TD-NMR and Gas Adsorption written by Bryan X. Medina-Rodriguez and published by . This book was released on 2021 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unconventional gas and oil reservoirs, also known as Shale reservoirs, represent a significant source of hydrocarbons, particularly in the US. The development of the industry has been the focus of research efforts over the last decade. However, the estimated ultimate recovery for these unconventional resources remains below 25% for gas and 5% for oil resources. Factors such as the limited understanding of processes occurring in the reservoir, the gaps in the analysis of matrix properties, and the scarcity of methods for the study of properties alteration, are responsible for the reduced ultimate recovery. In the work herein presented, I describe the synergistic use of multicomponent gas adsorption and Time-Domain Nuclear Magnetic Resonance (TD-NMR), along with complementary techniques, to effectively study shale porous media. The Characterization methods are used to gain valuable information regarding the evolution or changes of the porous media under different reactive environments, considering scenarios that include the interaction with stimulation fluid, fluids of different pH, among others. The evidence obtained shows that the combination of Gas Adsorption along with NMR is able to provide an acceptable description of the pore structure at different scales (micro, meso, and macro-pore regions), and allows one to infer the nature of rock changes on the surface properties (wettability) or the structure of the matrix. Furthermore, results evidenced the importance of understanding the behavior of all the reservoir components, e.g. organic matter or native formation water, to develop an accurate understanding of the alteration process a shale rock undergoes.