Analysis of formation damage and fracture choking in hydraulically induced fractured reservoirs due to asphaltene deposition

Ilyas Khurshid, Emad Walid AlShalabi, Hazim Al-Attar, Ahmed Khalifa AL-Neaimi

    Research output: Contribution to journalArticlepeer-review

    16 Scopus citations

    Abstract

    Hydraulically induced fractures provide a significant fraction of oil supply to the world from unconventional reservoirs due to their high permeability. However, these fractures might choke because of the deposition of organic and in-organic particles. Among organic particles, asphaltene deposition severely reduces reservoir permeability causing an exponential drop in production. In this work, a simulator is developed that predicts the performance of fractured reservoirs by solving the fluid flow governing equations for matrix and fractures. These flow equations were then incorporated with asphaltene deposition equations. Primarily, a numerical model is developed to predict the rate of asphaltene deposition and fracture choking in a radial geometry. It is found that asphaltene deposition could partially or completely choke fractures. Finally, the results are compared with the experimental data and determined various factors affecting fracture choking. From the detailed analysis, it is found that fracture choking is a few percent, but it increases with long production time. The sensitivity analysis was performed to investigate the effect of different influential parameters on permeability alteration of fractured reservoirs by asphaltene deposition. These parameters include fracture-to-matrix permeability ratio, production time, and asphaltene concentration. It is observed that, low fracture-to-matrix permeability ratio has a negligible effect on permeability of a reservoir. The developed model assumes negligible gravity and capillary forces. However, these forces might increase fracture choking in unconventional fractured reservoirs.

    Original languageBritish English
    Pages (from-to)3377-3387
    Number of pages11
    JournalJournal of Petroleum Exploration and Production Technology
    Volume10
    Issue number8
    DOIs
    StatePublished - 1 Dec 2020

    Keywords

    • Asphaltene deposition
    • Flocculation
    • Formation damage
    • Fracture choking
    • Oil production
    • Precipitation
    • Pressure drop

    Fingerprint

    Dive into the research topics of 'Analysis of formation damage and fracture choking in hydraulically induced fractured reservoirs due to asphaltene deposition'. Together they form a unique fingerprint.

    Cite this