FIELD: oil production industry, particularly for preventing accumulation of mineral salts and ferric sulfate in oil wells and in oil-field equipment.
SUBSTANCE: method involves treating produced water during oil extraction with mixture containing phosphorous-containing agent and additive and injecting treated water into bed. Aqueous solutions of alkali metal nitrates or ammonium nitrate are used as the additive. Ratio between phosphorous-containing agent and additive is from 1:1 to 1:4.
EFFECT: prevention of depositing mineral salts and ferric sulfate, which are products of reaction between iron ions contained in produced water and hydrogen sulfide.
13 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PREVENTING MINERAL SALT AND IRON SULFIDE DEPOSITS | 2000 |
|
RU2165008C1 |
| METHOD FOR BATCHING OF REAGENTS | 2004 |
|
RU2261397C1 |
| COMPOSITION FOR PREVENTION OF SALT FORMATION DURING OIL PRODUCTION | 2003 |
|
RU2259470C2 |
| COMPOUND FOR PREVENTING DEPOSITION OF SALTS AND SAND IN PRODUCTION OF OIL | 1997 |
|
RU2132451C1 |
| RESEARCH METHOD FOR PIPELINE DEMULSIFICATION PROCESS | 2014 |
|
RU2548721C1 |
| HARD COMPOUND FOR PREVENTING SEDIMENTATIONS OF NON-ORGANIC SALTS AND FERRUM SULFIDE DURING EXTRACTION AND TRANSPORTATION OF OIL | 2003 |
|
RU2244805C1 |
| COMPOSITION FOR PREVENTION OF INORGANIC SALT DEPOSITS | 2006 |
|
RU2316575C1 |
| METHOD OF PREVENTING DEPOSITS OF INORGANIC SALTS AND IRON SULFIDE IN CRUDE OIL PRODUCTION AND TRANSPORT AREAS | 1997 |
|
RU2140522C1 |
| COMPOSITION FOR COMBINED TREATMENT OF RECOVERED FLUIDS | 1997 |
|
RU2131969C1 |
| COMPOSITION FOR EQUIPMENT PROTECTION FROM CORROSION AND INORGANIC SALT DEPOSITS | 2006 |
|
RU2324005C2 |
