Interpretation of Thermal Well Falloff Testing

Stanislav, J.F.; Easwaran, C. V.; Kokal, Sunil

doi:10.2118/16747-pa

Cited by 10 publications

(20 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As suggested in [20] for a two-region model, Fig. 8 further confirms for the model presented in this study that for low values of β (0-0.1), shapes of the pressure and derivative curves are almost identical.…”

Section: ) Effect Of Heat Losssupporting

confidence: 88%

“…This flow regime may mask the early and middle-time responses. This fact can be confirmed by investigating the radial and PSS flow equations in [18] or [20]. The effect is significant on the inner and intermediate region responses.…”

Section: ) Effect Of Heat Lossmentioning

confidence: 63%

“…Following the work presented in [19] and [20], steam condensation resulting from the heat losses to the over-and underburdens is incorporated in the continuity equation. Assuming a three-region composite reservoir model (shown in Fig.…”

Section: Page 358mentioning

confidence: 99%

“…5 shows the perfect match for different mobility ratios. The model reproduces the model of [20] which was the starting point of this study regarding the heat loss analysis. Fig.…”

Section: A Model Validationmentioning

confidence: 99%

“…The model presented in [20] included steam condensation in the flow model by considering heat loss from the steam zone to overburden and underburden. They modified the original solution to the composite reservoir model by including a term, which accounts for the heat loss and carried out a sensitivity study of the solution to this term.…”

Section: ) Effect Of Heat Lossmentioning

confidence: 99%

See 4 more Smart Citations

A New Composite Reservoir Model for Thermal Well Test Analysis

G¹,

Jelmert²

2014

IJETT

View full text Add to dashboard Cite

Abstract-A composite reservoir may occur during any enhanced oil recovery project like steam injection into an oil reservoir. Falloff test analysis in steam injection projects offers a quick way to obtain estimates of the swept volume and steam zone properties. Most of the models used for the analysis assume two-region composite reservoirs with different but uniform properties separated by a sharp vertical interface, which is not very realistic. Strange trends seen on the pressure plots and the errors associated with the volume estimates could be related to the simplifying assumptions of the conventional models. The main objective of this paper is to develop a new analytical model for pressure transient analysis to improve previous results with inclusion of more realistic assumptions. The proposed model is a three-region composite model with an intermediate region in which mobility and storativity decrease as power law functions of the radial distance from the front. The fronts are considered to be tilted due to gravity effects. Steam condensation in the form of heat loss from the steam zone is also included in the analytical model. The new sets of type curves for well test interpretation are generated and verified. Effects of several parameters on the shape of type curves are discussed. The developed model can improve estimations of reservoir parameters using type curve matching and explain the anomalies seen on the data, which cannot be described using the conventional models. The general nature of the model makes it applicable to other types of composite reservoirs created either naturally or artificially.

show abstract

Section: ) Effect Of Heat Losssupporting

confidence: 88%

Section: ) Effect Of Heat Lossmentioning

confidence: 63%

Section: Page 358mentioning

confidence: 99%

“…5 shows the perfect match for different mobility ratios. The model reproduces the model of [20] which was the starting point of this study regarding the heat loss analysis. Fig.…”

Section: A Model Validationmentioning

confidence: 99%

Section: ) Effect Of Heat Lossmentioning

confidence: 99%

See 3 more Smart Citations

A New Composite Reservoir Model for Thermal Well Test Analysis

G¹,

Jelmert²

2014

IJETT

View full text Add to dashboard Cite

show abstract

Interpretation of temperature profiles during soak periods in steam-stimulated wells

2007

View full text Add to dashboard Cite

To address the problems existing in testing steam injection profiles in a steam-stimulated well during steam injection and production periods, this paper proposes that the temperature profile in the completion interval could be tested during the soak period. A mathematical model for calculating the vertical distribution of temperature in a single layer reservoir is established based on the temperature characteristics of steam stimulated reservoirs, and the vertical distribution of temperature in a single layer reservoir could be obtained and heat loss could be calculated. The temperature, which is disturbed by thermal conduction in a multilayer reservoir, and heat loss could be derived based on the superposition principle of temperature potential. This paper establishes a multilayer testing temperature profile interpretation method and interprets the actual test temperature profile of Well Gao 3-7-66. The results indicate that the temperature profile in the soak period can reflect the thermal absorption conditions in various reservoir beds.

show abstract