Potential severity of phase trapping in petroleum reservoirs: An analytical approach to prediction

Hadi Saboorian-Jooybari, Peyman Pourafshary

Research output: Contribution to journalReview article

4 Citations (Scopus)

Abstract

This study focuses on the evaluation and diagnosing of the potential severity of petroleum reservoirs for establishment of phase traps. In this area, very few diagnostic methodologies have been presented in the literature. Unfortunately, there is no universal agreement on the key influential factors in a phase-trapping phenomenon because each of the correlations was established on the basis of different sets of reservoir parameters (e.g., k; /; Swi; r) by use of the results of a number of aqueous-phase-trap tests over a limited range of rock and fluid properties. In the present work, an accurate technique is presented on the basis of the infiltration theory for prediction of the potential severity of phase-trapping damage. The fluid-saturation distribution around a well is analytically derived by linearizing and solving the governing partial-differential equation (PDE). Then, the calculated saturation profile in the vicinity of the wellbore is used to develop a new analytical diagnostic index, which is called a phase-trapping index (PTI). Knowing the fact that the saturation of the affected zone may be reduced to the irreducible rather than the initial value because of the capillary mechanics of the formation, interpretation guidelines are proposed to identify the regions that are susceptible to intense, serious, medium, and weak damage. Compared with other correlations, PTI offers several advantages such as generality, being founded on theory, and taking into account most of the key influential parameters. An example of a synthetic tight gas reservoir is presented to clearly demonstrate how the new technique can be applied.

Original languageEnglish
Pages (from-to)863-874
Number of pages12
JournalSPE Journal
Volume22
Issue number3
Publication statusPublished - Jun 1 2017
Externally publishedYes

Fingerprint

Petroleum reservoirs
trapping
petroleum
Fluids
saturation
prediction
Infiltration
Partial differential equations
Mechanics
Rocks
damage
fluid
mechanics
infiltration
methodology
rock
index
parameter
Tight gas

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Energy Engineering and Power Technology

Cite this

Potential severity of phase trapping in petroleum reservoirs : An analytical approach to prediction. / Saboorian-Jooybari, Hadi; Pourafshary, Peyman.

In: SPE Journal, Vol. 22, No. 3, 01.06.2017, p. 863-874.

Research output: Contribution to journalReview article

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