METHOD OF CHEMICAL TREATMENT OF FORMATION WELL ZONE FOR INTENSIFICATION OF HYDROCARBONS INFLOW Russian patent published in 2003 - IPC

Abstract RU 2209957 C1

FIELD: oil and gas producing industry. SUBSTANCE: method includes injection into formation of working agent in form of aqueous solution of oxidizer with addition of nonionic surfactant, holding of working agent in formation for 12 h and well completion. Oxidizer is used in form of calcium hypochlorite Ca(ClO)₂. Working agent contains the following amounts of components, wt. %: calcium hypochloride Ca(ClO)₂ 10; nonionic surfactant 0.03; the balance, water. Working agent is held in formation under pressure of injection. Technical result consists in development of chemical treatment method of well zone of formation drilled-in with use of polymer or polymer-argillaceous muds with aim of clearing of formation well zone from mud filtrates and increase of efficiency of operations involved in recovery of natural filtration-capacity properties of reservoir rocks and intensification of inflow of hydrocarbons. EFFECT: higher efficiency of method. 2 tbl

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RU 2 209 957 C1

Authors

Kleshchenko I.I.

Jagafarov A.K.

Dates

2003-08-10—Published

2001-12-03—Filed