Ways to increase the efficiency of opening and completion of wells

UDK: 622.244.442
DOI: 10.24887/0028-2448-2018-5-44-47
Key words: drilling fluid, weighting composition, diluting agent of tannin compound, perforation fluids
Authors: E.A. Kazimov (Oil and Gas Research and Design Institute, SOCAR, the Republic of Azerbaijan, Baku), A.B. Suleymanov (Azerbaijan State Oil and Industrial University, the Republic of Azerbaijan, Baku)

Drilling-in oil and gas producing horizons involves contamination of the bottomhole formation zone with various solid fractions, as well as mud filtrate. Conventional process operations sometimes result in reservoir properties deterioration, a significant increase in exploration cost, and loss of time. These factors and a number of other ones deeply affect well construction workmanship in the abnormal thermobaric conditions of clay-bearing rocks.

Accident-free and complication-free drilling-in oil and gas producing horizons closely depends on the correct selection of the blend composition, structural-mechanical properties and colloid-chemical properties of the chemicals and chemical base drilling muds, as well as technological fluids. New technological solutions aimed at property regulation of the above systems are proposed. In particular, an analysis of state-of-the-art problems in the area of development and implementation of chemicals and chemical base drilling muds for abnormally high and low reservoir pressures was conducted. New ecologically sound and cost-effective reagents and drilling fluids on their basis, process liquids, lubricating compositions have been developed and tested based on the proposed methodological approach. Performance capabilities of nanotechnology were used at the development stages. Especially, for preserving reservoir properties in the process of drilling and development of productive layers, a composite weighting agent has been developed to replace barite, as well as a tannin agent that allows to regulate the rheological properties of drilling fluids, both in mineralized and highly mineralized dispersion media, perforating liquid compositions with surface-active properties, a nanostructured composition to regulate tribotechnological parameters of drilling fluids.

At present, the developed composition is successfully used in the process of well drilling in Azerbaijan.

References

1. Jagafarov A.I., Nohrin A.F., Analysis of the quality of the sompletion of a well based on the test results during drilling (In Russ.), Stroitel'stvo neftjanyh i gazovyh skvazhin na sushe i na more, 1999, no. 4–5, pp. 45–47.

2. Janyshev L., Perspective drilling fluid systems for sompletion of a well (In Russ.), Burenie i neft', 2005, no. 10, pp. 28–29.

3. Dupriest F.E., Smith M.V., Zeilinger S.C., Shoykhet N.I., New method éliminâtes lost returns, World oil, Neftegazovye tehnologii, 2008, V. 229, no. 10.

4. Furlow W., New downhole fluids further improve recovery, Offshore. Int. Ed., 1998, no. 8, pp. 94, 96, 134.

5. Hallman John H., Formates in practice: field use and reclamation, World Oil, 1996, V. 217, no. 10, pp. 81-89.

6. Grjaznov I.V., Konovalov E.A., Ivanov Ju.A., Izjumskij V.P., Raw materials extention to produce chemical reagents required for bore holes construction (In Russ.), Stroitel'stvo neftjanyh i gazovyh skvazhin na sushe i na more, 2010, no. 9, pp. 33–37, 55, 57.

7. Kister E.G., Khimicheskaya obrabotka burovykh rastvorov (Chemical treatment of drilling fluids), Moscow: Nedra Publ., 1972, 392 p.

8. Miskarli A.K., Kolloidnaja himija promyvochnyh glinistyh suspenzij (Colloid chemistry of sludge), Baku: Azerneshr Publ., 1963, 217 p.

9. Patent no. 2567574, Reagent preparation method for chemical treatment of drill mud, Inventors: Kjazimov Je.A., Aliev N.M., Bajramova Sh.S., Sulejmanov A.B.вЃ 

Drilling-in oil and gas producing horizons involves contamination of the bottomhole formation zone with various solid fractions, as well as mud filtrate. Conventional process operations sometimes result in reservoir properties deterioration, a significant increase in exploration cost, and loss of time. These factors and a number of other ones deeply affect well construction workmanship in the abnormal thermobaric conditions of clay-bearing rocks.

Accident-free and complication-free drilling-in oil and gas producing horizons closely depends on the correct selection of the blend composition, structural-mechanical properties and colloid-chemical properties of the chemicals and chemical base drilling muds, as well as technological fluids. New technological solutions aimed at property regulation of the above systems are proposed. In particular, an analysis of state-of-the-art problems in the area of development and implementation of chemicals and chemical base drilling muds for abnormally high and low reservoir pressures was conducted. New ecologically sound and cost-effective reagents and drilling fluids on their basis, process liquids, lubricating compositions have been developed and tested based on the proposed methodological approach. Performance capabilities of nanotechnology were used at the development stages. Especially, for preserving reservoir properties in the process of drilling and development of productive layers, a composite weighting agent has been developed to replace barite, as well as a tannin agent that allows to regulate the rheological properties of drilling fluids, both in mineralized and highly mineralized dispersion media, perforating liquid compositions with surface-active properties, a nanostructured composition to regulate tribotechnological parameters of drilling fluids.

At present, the developed composition is successfully used in the process of well drilling in Azerbaijan.

References

1. Jagafarov A.I., Nohrin A.F., Analysis of the quality of the sompletion of a well based on the test results during drilling (In Russ.), Stroitel'stvo neftjanyh i gazovyh skvazhin na sushe i na more, 1999, no. 4–5, pp. 45–47.

2. Janyshev L., Perspective drilling fluid systems for sompletion of a well (In Russ.), Burenie i neft', 2005, no. 10, pp. 28–29.

3. Dupriest F.E., Smith M.V., Zeilinger S.C., Shoykhet N.I., New method éliminâtes lost returns, World oil, Neftegazovye tehnologii, 2008, V. 229, no. 10.

4. Furlow W., New downhole fluids further improve recovery, Offshore. Int. Ed., 1998, no. 8, pp. 94, 96, 134.

5. Hallman John H., Formates in practice: field use and reclamation, World Oil, 1996, V. 217, no. 10, pp. 81-89.

6. Grjaznov I.V., Konovalov E.A., Ivanov Ju.A., Izjumskij V.P., Raw materials extention to produce chemical reagents required for bore holes construction (In Russ.), Stroitel'stvo neftjanyh i gazovyh skvazhin na sushe i na more, 2010, no. 9, pp. 33–37, 55, 57.

7. Kister E.G., Khimicheskaya obrabotka burovykh rastvorov (Chemical treatment of drilling fluids), Moscow: Nedra Publ., 1972, 392 p.

8. Miskarli A.K., Kolloidnaja himija promyvochnyh glinistyh suspenzij (Colloid chemistry of sludge), Baku: Azerneshr Publ., 1963, 217 p.

9. Patent no. 2567574, Reagent preparation method for chemical treatment of drill mud, Inventors: Kjazimov Je.A., Aliev N.M., Bajramova Sh.S., Sulejmanov A.B.вЃ 


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