Model study on the kinetics of oil field formation damage due to salt precipitation from injection

J. Moghadasi, H. Müller-Steinhagen, M. Jamialahmadi, A. Sharif

Research output: Contribution to journalArticle

77 Citations (Scopus)

Abstract

Due to the extensive use of water injection for oil displacement and pressure maintenance in oilfields, many reservoirs experience the problem of scale deposition when injection water starts to break through. In most cases, the scaled-up wells are caused by the formation of sulfate and carbonate scales of calcium and strontium. Due to their relative hardness and low solubility, there are limited processes available for their removal and preventive measures such as the 'squeeze' inhibitor treatment have to be taken. It is therefore important to gain a proper understanding of the kinetics of scale formation and its detrimental effects on formation damage under both inhibited and uninhibited conditions. This paper presents the results of an experimental and theoretical study of permeability reduction of porous media caused by scaling. Two incompatible solutions of calcium and sulfate/carbonate ions were injected into the porous medium, where calcium sulfate or calcium carbonate was generated by chemical reaction. Mechanisms by which a precipitate reduces permeability include solids deposition on the pore walls due to attractive forces between the particles and the surfaces of the pores, individual particles blocking pore throats, and several particles bridging across a pore throat. The characteristics of the precipitate influence the extent of formation damage. Conditions such as large degree of supersaturation, presence of impurities, change in temperature, and rate of mixing control the quantity and morphology of the precipitating crystals.

Original languageEnglish
Pages (from-to)201-217
Number of pages17
JournalJournal of Petroleum Science and Engineering
Volume43
Issue number3-4
DOIs
Publication statusPublished - 1 Aug 2004
Externally publishedYes

Fingerprint

Oil bearing formations
oil field
Calcium
Water injection
calcium
Salts
sulfate
salt
kinetics
damage
Kinetics
Porous materials
porous medium
Precipitates
Carbonates
permeability
carbonate
Supersaturation
Calcium carbonate
supersaturation

Keywords

  • Kinetics
  • Oil field formation damage
  • Salt precipitation

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Fuel Technology

Cite this

Model study on the kinetics of oil field formation damage due to salt precipitation from injection. / Moghadasi, J.; Müller-Steinhagen, H.; Jamialahmadi, M.; Sharif, A.

In: Journal of Petroleum Science and Engineering, Vol. 43, No. 3-4, 01.08.2004, p. 201-217.

Research output: Contribution to journalArticle

Moghadasi, J. ; Müller-Steinhagen, H. ; Jamialahmadi, M. ; Sharif, A. / Model study on the kinetics of oil field formation damage due to salt precipitation from injection. In: Journal of Petroleum Science and Engineering. 2004 ; Vol. 43, No. 3-4. pp. 201-217.
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