Modeling cementation in porous media during waterflooding: Asphaltene deposition, formation dissolution and their cementation

Ilyas Khurshid, Hazim Al-Attar, Abdulrahman Alraeesi
  • Journal of Petroleum Science and Engineering, February 2018, Elsevier
  • DOI: 10.1016/j.petrol.2017.11.038

Formation damage during waterflooding

What is it about?

This research explains about the possible formation damage,in this study a detailed model is developed that predicts not only the deposition of asphaltene, formation dissolution and its precipitation, but also considers the irreversible formation damage i.e. cementation in the porous media. As a result, we developed a simulator in Matlab to model the cementation of the deposition of asphaltene, dissolution and precipitation of carbonate particles as a function of time and space. Therefore, the derived model is very useful and efficient in providing a true picture of the amount of porosity and permeability impairment during waterflooding. We also performed sensitivity analyses of different injection parameters, formation properties, its temperatures and depths, in order to control or minimize the irreversible formation damage (cementation) in the porous media.

Why is it important?

• During secondary recovery, water may react and disturb reservoir fluid equilibrium causing asphaltene deposition and formation dissolution. • The precipitation of dissoluted particles on deposited asphaltene may lead to cementation in the porous media. • It is observed that this cementation may cause an irreversible formation damage to the reservoir.

Perspectives

Dr Ilyas Khurshid
Khalifa University of Science Technology and Research

• The objective of this study is to develop a cementation model and suggest different techniques to control cementation in the porous media. • This study finds that deep reservoir with high temperature are less affected by cementation phenomenon than shallow reservoirs.

Read Publication

http://dx.doi.org/10.1016/j.petrol.2017.11.038

The following have contributed to this page: Dr Ilyas Khurshid