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Integration of the results of well test analysis and production log tests studies on the example of an oil-gas-condensate field of Gazprom Neft PJSC

UDK: 622.276.5.001.5
Key words: oil rim, well test analysis of horizontal wells, production log test of horizontal wells
Authors: D.Yu. Bazhenov,A.A. Artamonov, A.N. Shorohov (Gazpromneft - Yamal LLC, RF, Tyumen),I.V. Perevozkin, A.A. Ridel, A.A. Kolesnikova, D.A. Listoykin (Gazpromneft NTC LLC, RF, Saint-Petersburg)

Major oil reserves of considered oil-gas-condensate field are concentrated in the oil rim of Lower Cretaceous and Jurassic deposits. The classic approach to the development of this type of oil reserves is drilling long horizontal wells, in view of the need to create a small depression in the producing wells. At the same time, as a rule, the development of oil rims complicated breakthroughs "languages" of gas from the gas caps and water from the aquifer. Under these conditions, to obtain information about the formation, monitoring and control of development is extremely actual and complicated problem at the same time. Among the methods of obtaining such information there are well test analysis and production log tests for wells. Prolonged well-bore storage effect (due to the length of the horizontal sections of 1000m and over) at the trunk holding covers well testing flow regimes, allowing reliable determination of important parameters, such as producing part of  the horizontal trunk, the mechanical skin factor and vertical permeability (anisotropy of the formation). The most reliably determined parameters are integral horizontal permeability and skin factor.

The paper suggests the algorithm of estimation a range of uncertainty interaction parameters determined by well testing with a low degree of reliability. And also shows how the integration of well test analysis and production log tests studies can largely narrow down the range to evaluate the correctness of decisions on the choice of optimal approaches to the development of the object and technical fluids.

References

1. Deeva T.A., Kamartdinov M.R., Kulagina T.E., Mangazeev P.V., Gidrodinamicheskie

issledovaniya skvazhin: analiz i interpretatsiya dannykh (Hydrodynamic

studies of wells: the analysis and interpretation of data), Tomsk: Publ.

of TPU, 2009, 242 p.

2. Earlougher R.C. Jr., Advances in well test analysis, SPE Monograph Series,

SPE, Richardson, TX., 1977.

3. Kolesnikova A.A., Kremenetskiy M.I., Ipatov A.I. et al., Field-geophysical research

of horizontal wells in low unstable inflow. Problems and solutions

(In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 8, pp. 84–88.

4. Ipatov A.I., Kremenetskiy M.I., Gulyaev D.N. et al., Expanding milling and

reaming tools elements spontaneous twist -off cause analysis (In Russ.),

Neftyanoe khozyaystvo = Oil Industry, 2015, no. 9, pp. 68–72.

5. Valiullin R.A., Yarullin R.K., Peculiarities of geophysical research in running

horizontal wells (In Russ.), Vestnik Akademii nauk Respubliki Bashkortostan,

2014, V. 19, no. 1, pp. 21–28.

Major oil reserves of considered oil-gas-condensate field are concentrated in the oil rim of Lower Cretaceous and Jurassic deposits. The classic approach to the development of this type of oil reserves is drilling long horizontal wells, in view of the need to create a small depression in the producing wells. At the same time, as a rule, the development of oil rims complicated breakthroughs "languages" of gas from the gas caps and water from the aquifer. Under these conditions, to obtain information about the formation, monitoring and control of development is extremely actual and complicated problem at the same time. Among the methods of obtaining such information there are well test analysis and production log tests for wells. Prolonged well-bore storage effect (due to the length of the horizontal sections of 1000m and over) at the trunk holding covers well testing flow regimes, allowing reliable determination of important parameters, such as producing part of  the horizontal trunk, the mechanical skin factor and vertical permeability (anisotropy of the formation). The most reliably determined parameters are integral horizontal permeability and skin factor.

The paper suggests the algorithm of estimation a range of uncertainty interaction parameters determined by well testing with a low degree of reliability. And also shows how the integration of well test analysis and production log tests studies can largely narrow down the range to evaluate the correctness of decisions on the choice of optimal approaches to the development of the object and technical fluids.

References

1. Deeva T.A., Kamartdinov M.R., Kulagina T.E., Mangazeev P.V., Gidrodinamicheskie

issledovaniya skvazhin: analiz i interpretatsiya dannykh (Hydrodynamic

studies of wells: the analysis and interpretation of data), Tomsk: Publ.

of TPU, 2009, 242 p.

2. Earlougher R.C. Jr., Advances in well test analysis, SPE Monograph Series,

SPE, Richardson, TX., 1977.

3. Kolesnikova A.A., Kremenetskiy M.I., Ipatov A.I. et al., Field-geophysical research

of horizontal wells in low unstable inflow. Problems and solutions

(In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 8, pp. 84–88.

4. Ipatov A.I., Kremenetskiy M.I., Gulyaev D.N. et al., Expanding milling and

reaming tools elements spontaneous twist -off cause analysis (In Russ.),

Neftyanoe khozyaystvo = Oil Industry, 2015, no. 9, pp. 68–72.

5. Valiullin R.A., Yarullin R.K., Peculiarities of geophysical research in running

horizontal wells (In Russ.), Vestnik Akademii nauk Respubliki Bashkortostan,

2014, V. 19, no. 1, pp. 21–28.



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