Overestimation and underestimation of injectivity impairment due to salt precipitation and mineral dissolution would risk the mathematical modelling for estimating the potential CO2 sequestration in Malaysian Limestone. In-depth knowledge to minimize the misinterpretation of laboratory data is critical to reduce the uncertainties during CO2 pilot injection. Therefore, a set of coreflooding experiment under reservoir conditions using representative native cores, supercritical CO2 and synthetic formation brine was conducted to understand the effect of induced salt precipitation towards injectivity result. Stabilization time in differential pressure (∆P), analysis of effluent collected after CO2 Water Alternating Gas (WAG) injection and pH reading are key indicators of laboratory data reliability for simulation. The experimental result demonstrated the existence of scale formation and halite precipitation after the samples were subjected to supercritical CO2 WAG for a duration of two weeks. In conclusion, proper experimental procedure and coreflood design during CO2 flooding are the main factors that would affect the reliability of injectivity data and the injection study must be conducted continuously as chemical reaction between CO2 and the fluid-rock system would impact the physical changes of the core samples.


Article metrics loading...

Loading full text...

Full text loading...


  1. Civan, F.
    [2015] Reservoir Formation Damage. Gulf Professional Publishing, USA.
    [Google Scholar]
  2. Gharbi, O., Gödeke, S., Al-Sammaraie, M., Al-Shahwani, S.b, Cheneviere, P.a, Al-Mohannadi, N., Julien, P.
    [2014] Unlocking energy through innovation, technology and capability. International Petroleum Technology Conference. Society of Petroleum Engineers, 3270–3274.
    [Google Scholar]
  3. Gruesbeck, C. and Collins, R. E.
    [1982] Entrainment and deposition of fine particles in porous media. Society of Petroleum Engineers Journal, 22(6), 847–856.
    [Google Scholar]
  4. Jeddizahed, J. and Rostami, B.
    [2016] Experimental investigation of injectivity alteration due to salt precipitation during CO2 sequestration in saline aquifers. Advances in Water Resources, 96, 23–33
    [Google Scholar]
  5. Jin, M., Ribeiro, A., Mackay, E.
    [2016] Geochemical modelling of formation damage risk during CO2 injection in saline aquifers. Journal of Natural Gas Science and Engineering, 35, 703–719.
    [Google Scholar]
  6. Liu, H.H., Zhang, G., Yi, Z.
    [2013] A permeability-change relationship in the dry-out zone for CO2 injection into saline aquifers. International Journal of Greenhouse Gas Control, 15,42–47.
    [Google Scholar]
  7. Muller, N., Qi, R., Mackie, E.
    [2009] CO2 injection impairment due to halite precipitation. Energy Procedia, 1 (1), 3507–3514.
    [Google Scholar]
  8. Ott, H., Roels, S.M., de Kloe, K.
    , [2015] Salt precipitation due to supercritical gas injection: I. Capillary-driven flow in unimodal sandstone. International Journal of Greenhouse Gas Control, 43, 247–255.
    [Google Scholar]

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error