Determination of the formation temperature from shut-in logs: Estimation of the radius of thermal influence

Eppelbaum, Lev; Kutasov, I.M.

doi:10.1016/j.jappgeo.2011.01.011

Cited by 13 publications

(3 citation statements)

References 27 publications

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“…However, before wellbore fluid above the lost depth flows into formation (8.5 h), it is interestingly noted that the annulus temperature gradually increases with the increase of shut-in time at lost depth by heat convection, followed by quickly decreasing, and then slowly increases at bottom hole by heat conduction. Figures 11 and 12 also show that if the annulus temperature after circulation recovers to the initial formation temperature, shut-in time can be longer than that of circulation time [28]. The phenomenon accounts for the reason why long time for shut-in is needed to obtain initial formation temperature.…”

Section: Example Analysis In Shut Conditionmentioning

confidence: 92%

Estimation of Wellbore and Formation Temperatures during the Drilling Process under Lost Circulation Conditions

Yang

Meng

Gao

et al. 2013

Mathematical Problems in Engineering

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Significant change of wellbore and surrounding formation temperatures during the whole drilling process for oil and gas resources often leads by annulus fluid fluxes into formation and may pose a threat to operational security of drilling and completion process. Based on energy exchange mechanisms of wellbore and formation systems during circulation and shut-in stages under lost circulation conditions, a set of partial differential equations were developed to account for the transient heat exchange process between wellbore and formation. A finite difference method was used to solve the transient heat transfer models, which enables the wellbore and formation temperature profiles to be accurately predicted. Moreover, heat exchange generated by heat convection due to circulation losses to the rock surrounding a well was also considered in the mathematical model. The results indicated that the lost circulation zone and the casing programme had significant effects on the temperature distributions of wellbore and formation. The disturbance distance of formation temperature was influenced by circulation and shut-in stages. A comparative perfection theoretical basis for temperature distribution of wellbore-formation system in a deep well drilling was developed in presence of lost circulation.

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Section: Example Analysis In Shut Conditionmentioning

confidence: 92%

Estimation of Wellbore and Formation Temperatures during the Drilling Process under Lost Circulation Conditions

Yang

Meng

Gao

et al. 2013

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…The uses of these series allow us to compare the results obtained by LSRPM with a true SFT reported. These BHT-time series have been used to validate a wide variety of methods (see for instance: Andaverde et al, 2005;Santoyo et al, 2000;Bassam et al, 2010;Eppelbaum and Kutasov, 2011). Here Kutasov-Eppelbaum (KEM) Generalized version of the constant linear heat source Kutasov and Eppelbaum (2005) these temperature data were used for carrying out the numerical validation procedure of the LSRPM.…”

Section: Lsrpm Validation and Applicationmentioning

confidence: 99%

“…Thus the complete drilling process affects the static formation temperature (SFT) (Garcia-estrada et al, 2001;Kutasov and Eppelbaum, 2015), which is an important parameter for diverse geothermal and petroleum applications. The SFT (also known as virgin rock temperature) is an important parameter used in: (1) the optimum design of drilling and completion programs of geothermal and petroleum boreholes (Eppelbaum and Kutasov, 2011) and (2) the identification of permeable or porous zones characterized by lost circulation problems (Kutasov and Eppelbaum, 2009). In the geothermal industry the SFT is needed in: (i) the estimation of energy reserves, and (ii) reliable heat flow (Santoyo et al, 2000).…”

Section: Introductionmentioning

confidence: 99%