RU95102530A - Method of oil recovery - Google Patents

Method of oil recovery

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Publication number
RU95102530A
RU95102530A RU95102530/03A RU95102530A RU95102530A RU 95102530 A RU95102530 A RU 95102530A RU 95102530/03 A RU95102530/03 A RU 95102530/03A RU 95102530 A RU95102530 A RU 95102530A RU 95102530 A RU95102530 A RU 95102530A
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RU
Russia
Prior art keywords
water
polyacrylamide
formation
rim
volume
Prior art date
Application number
RU95102530/03A
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Russian (ru)
Other versions
RU2086757C1 (en
Inventor
И.Ф. Глумов
Р.Р. Ибатуллин
В.В. Слесарева
С.Г. Уваров
Н.А. Рощектаева
Original Assignee
Татарский Государственный Научно-Исследовательский И Проектный Институт Нефтяной Промышленности
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Priority to RU95102530A priority Critical patent/RU2086757C1/en
Publication of RU95102530A publication Critical patent/RU95102530A/en
Application granted granted Critical
Publication of RU2086757C1 publication Critical patent/RU2086757C1/en

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  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

FIELD: oil producing industry, particular, oil recovery from nonuniform formations with performance of isolating jobs for equalization of injectivity profile of injection wells and reduction of water inflow in producing wells with the help of visco-elastic compounds based on polyacrylamide. SUBSTANCE: the offered method includes successive injection into formation of solutions of polyacrylamide and aluminium salt. Injected between fringes of polyacrylamide and aluminum salt is fringe of sweet water, whose volume is determined by the equation offered in the invention description. Solution of surfactants is injected into formation with concentration determined by the equation offered in the invention description. EFFECT: provision of regulation of time taken for gel formation in formation and reduced mechanical and salt destruction of polyacrylamide.

Claims (1)

Изобретение относится к нефтедобывающей промышленности, в частности к способам добычи нефти из неоднородных пластов с проведением изоляционных работ для выравнивания профиля приемистости нагнетательных и уменьшения водопритока добывающих скважин с помощью вязко-упругих составов на основе полиакриламида. Способ включает последовательную закачку в пласт растворов полиакриламида и соли алюминия. Новым в способе является то, что между оторочками полиакриламида и соли алюминия закачивают оторочку пресной воды, размер которой определяют из уравнения Vводы= π[X2-(X-l1,2)2]h•m, где Vводы - объем промежуточной оторочки воды, м3, Х - расстояние от забоя скважины до места образования вязко-упругого состава, м, l - зона смешения закачиваемых реагентов с водой (раствора ПАА с водой, l2 - соли алюминия с водой), м, h - толщина обрабатываемого высокопроницаемого участка, м, /m - пористость обрабатываемого высокопроницаемого участка, доли единицы. Другим отличием способа является то, что раствор ПАА закачивают в пласт концентрацией, определяемой из уравнения
Figure 00000001
, где С - концентрация закачиваемого в пласт раствора ПАА, мас. %, С1 - концентрация ПАА в пласте после разбавления водой, мас. %, V1 - объем оторочки ПАА, м3; V2 - объем промежуточной оторочки воды, м3, V3 - объем оторочки соли алюминия, м3. Способ позволяет регулировать время гелеобразования в пласте и снизить механическую и солевую деструкцию полиакриламида в 1,5 - 3,8 раза.The invention relates to the oil industry, in particular to methods of oil production from heterogeneous formations with insulation work to align the injectivity profile of injection wells and to reduce the influx of production wells using visco-elastic compositions based on polyacrylamide. The method includes the sequential injection into the formation of solutions of polyacrylamide and aluminum salts. New in the method is that between the rims of polyacrylamide and aluminum salt, a rim of fresh water is pumped, the size of which is determined from the equation V of water = π [X 2 - (Xl 1,2 ) 2 ] h • m, where V of water is the volume of the intermediate rim water, m 3 , X is the distance from the bottom of the well to the place of formation of the viscoelastic composition, m, l is the mixing zone of the injected reagents with water (PAA solution with water, l 2 is aluminum salt with water), m, h is the thickness of the processed highly permeable section, m, / m - porosity of the processed highly permeable section, fraction of a unit Another difference of the method is that the PAA solution is pumped into the reservoir by a concentration determined from the equation
Figure 00000001
where C is the concentration of the PAA solution injected into the formation, wt. %, C 1 - concentration of PAA in the reservoir after dilution with water, wt. %, V 1 - the volume of the rim of PAA, m 3 ; V 2 is the volume of the intermediate rim of the water, m 3 , V 3 is the volume of the rim of the aluminum salt, m 3 . The method allows you to adjust the gelation time in the reservoir and reduce the mechanical and salt degradation of polyacrylamide in 1.5 - 3.8 times.
RU95102530A 1995-02-21 1995-02-21 Oil production method RU2086757C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU95102530A RU2086757C1 (en) 1995-02-21 1995-02-21 Oil production method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU95102530A RU2086757C1 (en) 1995-02-21 1995-02-21 Oil production method

Publications (2)

Publication Number Publication Date
RU95102530A true RU95102530A (en) 1997-04-20
RU2086757C1 RU2086757C1 (en) 1997-08-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
RU95102530A RU2086757C1 (en) 1995-02-21 1995-02-21 Oil production method

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RU (1) RU2086757C1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2272899C1 (en) * 2004-08-18 2006-03-27 Елена Александровна Румянцева Method for polymeric gel-forming composition choice to increase reservoir recovery and perform waterproofing works
RU2485301C1 (en) * 2011-12-26 2013-06-20 Открытое акционерное общество "Татнефть" имени В.Д. Шашина Oil production method
RU2496818C2 (en) * 2011-12-30 2013-10-27 Иван Александрович Маринин Selection method of polymer gel-forming composition to increase oil recovery of formations and waterproofing work
RU2562634C2 (en) * 2013-12-24 2015-09-10 Айдар Алмазович Газизов Reservoir recovery improvement method

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Publication number Publication date
RU2086757C1 (en) 1997-08-10

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