Loading...

Geochemical Evaluation and Simulation of Acid Penetration in Carbonate Reservoirs Near Wellbore using Eclipse and PHREEQC Software

Souri Solout, Alireza | 2025

0 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 57805 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Jamshidi, Saeed
  7. Abstract:
  8. Any reduction in permeability around the well is referred to as formation damage. After drilling operations are completed, various types of tests and logging are conducted. If formation damage is detected, it is typically remedied through acidizing. In carbonate reservoirs, acid is used to dissolve the rock, creating wormholes that bypass the damaged zone. However, it is important to note that in carbonate reservoirs, even in the absence of formation damage, acidizing can increase the productivity index (PI) by up to 50%. A thorough understanding of the mineralogy is necessary for effective acidizing. Generally, chemical analysis requires consideration of parameters such as acid additives, temperature and pressure, acid concentration, type of acid, acid injection rate, and the formation’s composition. Considering these factors, attention must also be given to the formation fluid and the ions present within it, and the effects of these parameters can be observed through geochemical simulation and fluid flow simulation. For carbonate reservoirs, there are three common acids: hydrochloric acid, formic acid, and acetic acid. In this project, we aim to conduct geochemical simulation using the PHREEQC software and couple it with the ECLIPSE reservoir simulator to evaluate fluid flow effects. Additionally, we will solve the relevant fluid flow equations, including the mass conservation equation, mass transfer equation, and Fick's first and second laws of diffusion. In summary, by analyzing both geochemical interactions and fluid flow in the porous environment of carbonate reservoirs, we aim to achieve results that include changes in porosity and permeability
  9. Keywords:
  10. Formation Damage ; Wormhole ; Carbonate Resrevoirs ; PHREEQC Software ; ECLIPSE Software ; Geochemical Modeling

 Digital Object List

 Bookmark

No TOC