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37 results on '"Hassan, Anas M."'

36. Geochemical Modeling of Engineered Water Injection in Carbonates Under Harsh Conditions: New Insights With Ionic Adsorption

Author

Khurshid, Ilyas, Al-Shalabi, Emad W., Afgan, Imran, Khurshid, Bilal, and Hassan, Anas M.

Abstract

Carbonates are characterized by low oil recovery due to their positive surface charge and consequent high affinity to negatively charged crude oil, rendering them to a state of mixed-to-oil wettability. Thus, a better understanding of the rock/brine/oil interactions and their effect on potential-determining ions (PDIs) adsorption/desorption during engineered water injection is needed for realistic and representative estimations of oil recovery. Therefore, this study reveals a novel approach to capture various interactions and better predict the effect of PDIs adsorption/desorption as well as the concentrations of various ionic species in the effluent using Phreeqc. In this work, we determined the adsorption/desorption of PDIs for the first time using surface-complexation reactions and then we validated our results with experimental data from the literature. Our results revealed that the presence of PDIs and their respective adsorption/desorption results in surface charge decrease and increase in pH. Also, this study found that ionic adsorption depends on ionic strength and species activity where calcium adsorption remained constant while magnesium and sulfate adsorptions varied with ionic strength. Moreover, magnesium ion was found to be the most sensitive ionic species to temperature as opposed to calcium and sulfate ions. In addition, sulfate spiking and dilution decrease the sulfate adsorption since the sulfate starts reacting with magnesium and forming complexes. Additionally, deionized water resulted in the highest charge decrease and pH increase with related incremental oil recovery. The adsorption/desorption of ions is case-dependent and thus, the findings cannot be generalized.

Published
2023
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37. Advances in Understanding Polymer Retention in Reservoir Rocks: A Comprehensive Review.

Author

Salam, Abdul Haris, Alsaif, Bidoor, Hussain, Syed Muhammad Shakil, Khan, Sarmad, Kamal, Muhammad Shahzad, Patil, Shirish, Al-Shalabi, Emad W, and Hassan, Anas M

Subjects
*RESERVOIR rocks, *POLYMERS, *ROCK properties, *SURFACE charges, *POROUS polymers, *POROUS materials
Abstract

AbstractUnderstanding polymer retention is a critical aspect in the field of chemical-enhanced oil recovery (cEOR). This article presents a comprehensive review of polymer retention in reservoir rocks, focusing on the underlying mechanisms, measurement techniques, and the factors influencing this phenomenon. Three main (proposed) mechanisms that contribute to polymer retention are discussed in detail. Polymer adsorption, hydrodynamic retention, and mechanical entrapment are identified as key factors affecting the overall retention of polymers during flow through porous media. Also, herein, we explore the details of these mechanisms, explaining how polymer characteristics and rock surface properties influence the degree of retention. Furthermore, we analyze the influencing factors that affect polymer retention. The rock surface properties, such as surface charge and wettability, play a vital role in determining the interaction between polymers and rocks. The interplay of these factors provides valuable insights into understanding and controlling polymer retention in cEOR applications. This review paper put in a nutshell a comprehensive understanding of the mechanisms, measurement techniques, and influencing factors involved. [ABSTRACT FROM AUTHOR]

Published
2024
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