Undiscovered DTS potential of horizontal well inflow profile monitoring

Authors: A.I. Ipatov, M.I. Kremenetskiy, I.S. Kaeshkov (Gazpromneft NTC LLC, RF, Moscow), I.A. Klishin (Gazpromneft - Noyabrsneftegazgeofizika» JSC, RF, Noyabrsk); M.A. Solodyankin, E.V. Figura (Laser Solutions CJSC, RF, Saint-Petersburg)

Key words: distributed temperature sensing (DTS), transient process, inflow profile, fiber optics.

Distributed temperature sensors have several important advantages. They enable to obtain on-line information about well conditions and the frequency of measurements is greatly higher than traditional PLTs on wireline or coil-tubing. Additionally the price of multisensor PLT in horizontal well with low oil rate is extremely high.

Interpretation methods of such data, which are wide spread in literature, do not allow to realize informative potential of DTS technology completely. Interpretation models that are used contain a lot of input parameters and can’t be considered effective in case of limited volume of data.

The authors conducted mathematic modeling of heat and mass transfer in horizontal well and also realized several DTS measurements in vertical multilayered well. It showed that transient processes during well-start or stop contain information about inflow profile. This information is of high value because it almost doesn’t depend on temperature properties of the rocks and fluid. It can be interpreted using simple express methods. In the author’s opinion the development of such methods and measurements technologies is the matter of nearest future.
References
1. Ipatov A.I., Kremenetskiy M.I., Geofizicheskiy i gidrodinamicheskiy kontrol'
razrabotki mestorozhdeniy uglevodorodov (Geophysical and hydrodynamic
control of development of hydrocarbon deposits), Izhevsk: Regulyarnaya i
khaoticheskaya dinamika Publ., 2010, 780 p.
2. Valiullin R.A., Geofizicheskie issledovaniya i raboty v skvazhinakh (Geophysical
research and operations in wells), Part 3. Issledovaniya deystvuyushchikh
skvazhin (Research of operating wells), Ufa: Inform-reklama Publ., 2010, 184 p.
3. Mustafa H.D., Abdouche Gh., Khedr O.H., Elkadi A., Al-Mutairi A.M., A new
production logging tool allows a superior mapping of the fluid velocities and
holdups inside the well bore, SPE-93556-MS, 2005.
4. Torne J.P., Arevalo F.J., Jay Ph.L., Salim M.E., Guergueb N.F., Gary J., A successful introduction of a new tools configuration and analysis method for production logging in horizontal wells, SPE Conference Paper , 2011
5. Grechanov A., Naumov A., Velikodnev V. et al., Continuous real-time
pipeline deformation, 3D positioning and ground movement monitoring
along the Sakhalin – Khabarovsk – Vladivostok pipeline, 9th International
Pipeline Conference, IPC2012-90476.
6. Braun Dzh., Sautkhempton, Rogachev D., Tekhnologii TEK, 2005, no. 1.

Key words: distributed temperature sensing (DTS), transient process, inflow profile, fiber optics.

Distributed temperature sensors have several important advantages. They enable to obtain on-line information about well conditions and the frequency of measurements is greatly higher than traditional PLTs on wireline or coil-tubing. Additionally the price of multisensor PLT in horizontal well with low oil rate is extremely high.

Interpretation methods of such data, which are wide spread in literature, do not allow to realize informative potential of DTS technology completely. Interpretation models that are used contain a lot of input parameters and can’t be considered effective in case of limited volume of data.

The authors conducted mathematic modeling of heat and mass transfer in horizontal well and also realized several DTS measurements in vertical multilayered well. It showed that transient processes during well-start or stop contain information about inflow profile. This information is of high value because it almost doesn’t depend on temperature properties of the rocks and fluid. It can be interpreted using simple express methods. In the author’s opinion the development of such methods and measurements technologies is the matter of nearest future.
References
1. Ipatov A.I., Kremenetskiy M.I., Geofizicheskiy i gidrodinamicheskiy kontrol'
razrabotki mestorozhdeniy uglevodorodov (Geophysical and hydrodynamic
control of development of hydrocarbon deposits), Izhevsk: Regulyarnaya i
khaoticheskaya dinamika Publ., 2010, 780 p.
2. Valiullin R.A., Geofizicheskie issledovaniya i raboty v skvazhinakh (Geophysical
research and operations in wells), Part 3. Issledovaniya deystvuyushchikh
skvazhin (Research of operating wells), Ufa: Inform-reklama Publ., 2010, 184 p.
3. Mustafa H.D., Abdouche Gh., Khedr O.H., Elkadi A., Al-Mutairi A.M., A new
production logging tool allows a superior mapping of the fluid velocities and
holdups inside the well bore, SPE-93556-MS, 2005.
4. Torne J.P., Arevalo F.J., Jay Ph.L., Salim M.E., Guergueb N.F., Gary J., A successful introduction of a new tools configuration and analysis method for production logging in horizontal wells, SPE Conference Paper , 2011
5. Grechanov A., Naumov A., Velikodnev V. et al., Continuous real-time
pipeline deformation, 3D positioning and ground movement monitoring
along the Sakhalin – Khabarovsk – Vladivostok pipeline, 9th International
Pipeline Conference, IPC2012-90476.
6. Braun Dzh., Sautkhempton, Rogachev D., Tekhnologii TEK, 2005, no. 1.


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