Analytical Theory of Combined Condensing/Vaporizing Gas Drives

Johns, Russell T.; Dindoruk, Birol; Orr, Franklin M.

doi:10.2118/24112-pa

Cited by 164 publications

(144 citation statements)

References 20 publications

Supporting

Mentioning

144

Contrasting

Order By: Relevance

“…As a consequence of the parameterization, the -1 conservation equations, that were formerly solved in each grid block, is reduced to 2 equations. It is worth noticing that the advanced framework used in solving the problem in tie-line space was built based on the ideas originated from the Method of Characteristics (MOC) based theory of gas injection process [13] & [27] and tie-line based parameterization technique proposed in [10] & [28].…”

Section: Resultsmentioning

confidence: 99%

“…The velocity of each composition in this plot follows a simple rule -where the characteristic velocity should monotonically increase from injection to initial composition. To satisfy this condition, the consistent solution should contain two shocks connecting initial and injection compositions and it is generally independent from the number of components present in the system [29] & [27]. These two shocks are referred to as the leading shock and the trailing shock.…”

Section: General Structure Of Compositional Solutionmentioning

confidence: 99%

“…In [12], it was proven as well that the solution route enters and exits the two phase region by a shock and that these shocks coincides with the tie-line and its extension. Later, an insightful demonstration on the basis of a unified Method of Characteristics (MOC) framework was carried out on a gas injection processes [29] & [27]. The theory was limited to dispersion free 1D displacement problem and it was shown that the entire displacement path can be constructed based on the key tie-lines of the system.…”

Section: Number Of Phases − 1 Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Multiscale Reconstruction Of Compositional Transport

2018

View full text Add to dashboard Cite

Section: Resultsmentioning

confidence: 99%

Section: General Structure Of Compositional Solutionmentioning

confidence: 99%

Section: Number Of Phases − 1 Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multiscale Reconstruction Of Compositional Transport

2018

View full text Add to dashboard Cite

“…Orr et al 40 and Johns et al 26 showed that crossover tie line controls the development of miscibility in combined vaporizing-condensing mechanisms.…”

Section: Thermodynamic Methodsmentioning

confidence: 99%

Evaluating Reservoir Production Strategies in Miscible and Immiscible Gas-Injection Projects

Farzad

Amani

2007

Latin American &Amp; Caribbean Petroleum Engineering Conference

View full text Add to dashboard Cite

Simulation results indicated that injection pressure was a key parameter that influences oil recovery to a high degree. MMP appears to be the optimum injection pressure since the incremental oil recovery at pressures above the MMP is negligible and at pressures below the MMP recovery is substantially lower.Stratification, injection-well completion pattern, and vertical-to-horizontal permeability ratios could also affect the recovery efficiency of the reservoir in a variety of ways discussed in this work.

show abstract

“…the gas tie line, the oil tie line, or the crossover tie line) becomes a 29 critical tie line as the pressure or enrichment is increased. For CV displacements, the crossover tie line controls the development of miscibility, and therefore, the oil or gas composition does not lie outside of the region of tie-line extensions for MCM flow as it must for ternary displacements (Johns et al, 1993b). The signature of a CV displacement is that component K-values converge towards unity in the upstream direction during the condensing portion of the CV displacement and diverge from unity during the vaporizing portion.…”

mentioning

confidence: 99%

Development of More-Efficient Gas Flooding Applicable to Shallow Reservoirs

Rossen¹,

Johns²,

Pope³

2003

View full text Add to dashboard Cite

ABSTRACT:The objective of this research is to widen the applicability of gas flooding to shallow oil reservoirs by reducing the pressure required for miscibility using gas enrichment and increasing sweep efficiency with foam. Task 1 examines the potential for improved oil recovery with enriched gases. Subtask 1.1 examines the effect of dispersion processes on oil recovery and the extent of enrichment needed in the presence of dispersion. Subtask 1.2 develops a fast, efficient method to predict the extent of enrichment needed for crude oils at a given pressure. Task 2 develops improved foam processes to increase sweep efficiency in gas flooding. Subtask 2.1 comprises mechanistic experimental studies of foams with N 2 gas. Subtask 2.2 conducts experiments with CO 2 foam. Subtask 2.3 develops and applies a simulator for foam processes in field application.Regarding Task 1, significant research was accomplished in the last three and one-half years with over 11 journal and conference publications, many of which have been repeatedly referenced by other researchers. All goals, except one, were accomplished for both Task 1.1 and Task 1.2. The remaining goal on the development of accurate CO 2 MMP correlations is near completion and will be published in a future paper. Task 1.1 focused on the effect of dispersive processes on oil recovery and how to enrich gas so that the MMP can be reduced. Simulation studies (Solano et al., 2001; 4 Stalkup, 1990) show that oil recovery for enriched gas drives depends on the amount of dispersion in reservoir media, but the value of dispersion, expressed as dispersivity, at the field scale, is unknown. This research investigated three types of dispersion in permeable media to obtain realistic estimates of dispersive mixing at the field scale. These types are echo dispersivity, which is unaffected by fluid flow direction, transmission dispersivity, which is caused by layering in permeable media, and local dispersivity, which is the mixing observed at a point in the reservoir as tracer flows past.We analyzed a collection of single-well tracer test (SWTT) data to estimate echo dispersivity at the SWTT scale. The estimated echo dispersivities closely match a published trend with length in dispersivities obtained from groundwater tracer tests. This unexpected result-it was thought that transmission dispersivity should be greater than echo dispersivity-is analyzed with numerical simulation. The agreement between the SWTT echo dispersivities and the field trend suggests that the field data are measuring local dispersivities, which are on the order of 2 ft. All dispersivities appear to grow with length.The interaction of phase behavior and flow, in the presence of dispersive mixing, was examined for 1-D four-component and twelve-component enriched-gas displacements. Numerical and analytical solutions demonstrated that oil recovery may be substantially increased by gas enrichment above the minimum enrichment for miscibility (MME). For the twelve-component oil, the increase in recovery (displ...

show abstract

Analytical Theory of Combined Condensing/Vaporizing Gas Drives

Cited by 164 publications

References 20 publications

Multiscale Reconstruction Of Compositional Transport

Multiscale Reconstruction Of Compositional Transport

Evaluating Reservoir Production Strategies in Miscible and Immiscible Gas-Injection Projects

Development of More-Efficient Gas Flooding Applicable to Shallow Reservoirs

Contact Info

Product

Resources

About