Page 272 - Formation Damage during Improved Oil Recovery Fundamentals and Applications

CHAPTER SIX

Formation Damage by Organic
Deposition

Rouzbeh G. Moghanloo, Davud Davudov and Emmanuel Akita
The University of Oklahoma, Norman, OK, United States

Contents
6.1 Introduction, Definition, Existence State of Asphaltene in Crude Oil, Molecular
Structure of Asphaltene, Monitoring, and Remediation 244
6.1.1 Introduction 244
6.1.2 Definition 245
6.1.3 Molecular structure of asphaltene 245
6.1.4 Monitoring and remediation 246
6.1.5 Experimental techniques to determine asphaltene-onset-pressure and
wax-appearance-temperature 247
6.2 Asphaltene Formation Mechanisms Review: Precipitation, Aggregation and
Deposition Mechanism, Solubility 247
6.2.1 Asphaltene precipitation 248
6.2.2 Solubility parameter 249
6.2.3 Asphaltene precipitation models 249
6.2.4 Asphaltene deposition 250
6.3 Issues With Asphaltene Deposition 251
6.3.1 Asphaltene issues during oil production 251
6.3.2 Formation damage and field experience 251
6.3.3 Asphaltene deposition during CO 2 flooding 252
6.4 Deposition in Porous Media 253
6.4.1 Microfluidic experiments 253
6.4.2 Taylor Couette device studies 254
6.4.3 (Imaging) Core flood experiments 254
6.4.4 Porous media studies 255
6.5 Permeability Damage Models 257
6.5.1 Permeability reduction: effect of surface deposition and pore plugging 258
6.5.2 Plugging and nonplugging parallel pathways model 258
6.5.3 Power law permeability reduction 260
6.5.4 Case studies: evaluation of surface deposition and pore plugging effects 261
6.5.5 Effect of flow rate—particle entrainment 268
6.6 Conclusions 269
References 270
Further Reading 273

Formation Damage during Improved Oil Recovery. © 2018 Elsevier Inc.
DOI: https://doi.org/10.1016/B978-0-12-813782-6.00006-3 All rights reserved. 243