SU905440A1 - Method of selective operation of formation - Google Patents
Method of selective operation of formation Download PDFInfo
- Publication number
- SU905440A1 SU905440A1 SU802930176A SU2930176A SU905440A1 SU 905440 A1 SU905440 A1 SU 905440A1 SU 802930176 A SU802930176 A SU 802930176A SU 2930176 A SU2930176 A SU 2930176A SU 905440 A1 SU905440 A1 SU 905440A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- formation
- reservoir
- buffer fluid
- selective operation
- selective treatment
- Prior art date
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Description
(S) СПОСОБ СЕЛЕКТИВНОЙ ОБРАБОТКИ ПЛАСТА(S) METHOD FOR SELECTIVE TREATMENT OF THE PLATE
Изобретение относитс к нефтепере рабатывающей промышленности, в частности к способам обработки пластов дл увеличени их нефтеотдачи. Известен способ обработки пласта, заключающийс в тампонировании пласта последовательной закачкой водных растворов реагентов, вступающих в реакцию в проницаемых участках пласт с выпадением осадка или образованием гел fij. Недостатком данного способа вл етс его неселективность, т.е. образование осадка или гел происходит как в водно-, так и в нефтенасыщенны проплостках. Известен способ селективной обработки пласта путем закачки в него буферной жидкости и последующего нагнетани тампонирующего состава, при чем в качестве буферной жидкости используют поверхностно-активное вещество , а в качестве тампонирующего состава - патекс L JСпособ недостаточно эффективен из-за неглубокой изол ции обводненных зон пласта. Цель изобретени - повышение эЛфективности обработки. Указанна цель достигаетс тем, что согласно способу селективной обработки путем закачки в него буферно жидкости и последующего нагнетани тампонирующего состава в качестве буферной жидкости использу1эт водный раствор соли или гидроокиси щелочного металла, образующих в пластовых услови х с ионами кальци и магни нерастворимые в воде соединени . Закачивают в пласт водный раствор соли или гидроокиси щелочного металла . Закачивают в пласт тампониру13Й$ий состав, способный коагулировать при взаимодействии с ионами поливалентных металлов. Выдерживают тампонирующий состав в пласте в течение времени , необходимого дл полной коагул ции .The invention relates to the oil refining industry, in particular to methods of treating formations to increase their oil recovery. A known method of treating a reservoir consists in plugging a formation by sequential injection of aqueous solutions of reagents that react in permeable areas of the formation with sedimentation or the formation of a gel fij. The disadvantage of this method is its non-selectivity, i.e. Sediment or gel formation occurs in both water and oil saturated streaks. There is a method of selective treatment of a reservoir by pumping a buffer fluid into it and subsequent injection of a plugging composition, and a surfactant is used as a buffer fluid, and a patex L J Method is not sufficiently effective as a plugging composition due to the shallow isolation of the watered zones of the reservoir. The purpose of the invention is to increase the processing efficiency. This goal is achieved in that according to the method of selective treatment by pumping buffer fluid into it and subsequent injection of a plugging composition, an aqueous solution of an alkali metal salt or hydroxide forming calcium and magnesium-insoluble compounds in water is used as a buffer liquid. An aqueous solution of an alkali metal salt or hydroxide is pumped into the formation. A tamponir composition is injected into the reservoir and can coagulate when interacting with polyvalent metal ions. The plugging composition in the reservoir is maintained for the time required for complete coagulation.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU802930176A SU905440A1 (en) | 1980-03-21 | 1980-03-21 | Method of selective operation of formation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU802930176A SU905440A1 (en) | 1980-03-21 | 1980-03-21 | Method of selective operation of formation |
Publications (1)
Publication Number | Publication Date |
---|---|
SU905440A1 true SU905440A1 (en) | 1982-02-15 |
Family
ID=20897952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU802930176A SU905440A1 (en) | 1980-03-21 | 1980-03-21 | Method of selective operation of formation |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU905440A1 (en) |
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1980
- 1980-03-21 SU SU802930176A patent/SU905440A1/en active
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