Sand entry and water ingress elimination in watered areas of oil and gas condensate reservoirs: a case-study of Cenomanian horizon

Almost all oil and gas condensate reservoirs of GAZPROM’s Bolshoi Urengoy field were operated in the mode of reservoir pressure depletion, which governed low oil and gas condensate recovery. At the present time, more than 80% of proven reserves have been extracted, and mining operations have come into final phase. Stabilization of sources of mineral resources is an acute problem of oil and gas companies. The Urengoy oil and gas condensate field holds huge commercial reserves of formation water, and has all facilities for recovery and transport of reservoir fluids. Joint production of residual hydrocarbons and commercial formation water, with recovery of valuable components can become a top priority trend in utilization of resources available in the reservoir–aquifer system. The long-term operation of the field has resulted in alteration of thermobaric characteristics, and in partial or total watering of producing strata, which has lead to squeezing and shutdown of many wells and even production areas. The other aggravating phenomena are failure of bottom-hole formation zone, water ingress and sand entry. It is required to introduce novel engineering solutions and process designs to prevent the problems in extraction of residual hydrocarbons and commercial reservoir water in order to extend producing life of old wells, which can raise oil and gas condensate recovery factor and can provide extra profit.

Keywords: Bolshoi Urengoy oil and gas condensate field, mineral resources and mineral reserves, incompetent sand and sandstone, oil and gas condensate recovery factor, water ingress, sand entry, self-squeezing, hydraulic fracturing, fracturing fluid, poroperm properties, joint-andseparate production.

For citation:

Temirov V. G., Sarkarov T. E. Sand entry and water ingress elimination in watered areas of oil and gas condensate reservoirs: a case-study of Cenomanian horizon of Bolshoi Urengoy field. MIAB. Mining Inf. Anal. Bull. 2021;(3-1):276—283. [In Russ]. DOI: 10.25018/0236_1493_2021_31_0_276.

Acknowledgements:

About authors:

Temirov V. G., Cand. Sci. (Eng.), Senior Researcher of the Makhachkala Department, Gazprom VNIIGAZ LLC, temirovvg@mail.ru, Russia;
SarkarovT. E., Dr. Sci. (Eng.), Head of Department, Dagestan State Technical University, rsarkarov@gazpromproject.ru, Russia.

 

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