FIELD: oil and gas production.
SUBSTANCE: invention is dealing with oil and gas well casing, in particular with preparing cementation of casing strings. Foaming formulation containing, wt %: sulfonol surfactant, 0.5-0.8, industrial chalk as seeding agent, 5-8, foam stabilizer, 12-15, and water (in balancing amount) contains, as foam stabilizer, fine-grain sand, 12-15, and additionally contains aqueous hydrochloric acid as cleaning agent, 10-12, and acetic acid as corrosion inhibitor, 0.5-3.
EFFECT: increased efficiency in cleaning well walls at more full displacement and partial dissolution of clayey drilling mud when preparing well for cementation due to elevated viscoelastic properties of foam.
1 tbl, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| FOAMING COMPOSITION | 2000 |
|
RU2187533C2 |
| METHOD OF PREPARING WELLS TO CEMENTATION | 1999 |
|
RU2137906C1 |
| METHOD FOR PREPARATION OF WELL TO CEMENTATION | 1996 |
|
RU2102581C1 |
| METHOD FOR WELL CEMENTATION | 2002 |
|
RU2232258C2 |
| METHOD OF CEMENTING CASING PIPE OF GAS WELL UNDER CONDITIONS OF PERMAFROST ROCKS | 2006 |
|
RU2342517C2 |
| FOAM FORMING COMPOSITION FOR PRODUCTIVE STRATUM PERFORATION | 2003 |
|
RU2252238C1 |
| WEIGHTED DISPLACEMENT FLUID | 2014 |
|
RU2561134C1 |
| METHOD OF PREPARING BOREHOLE FOR CEMENTING | 0 |
|
SU630402A1 |
| DRILLING-IN METHOD | 2008 |
|
RU2347900C1 |
| METHOD FOR STRING CEMENTING IN WELL USING CEMENT MORTAR WITH EROSION PROPERTIES | 2009 |
|
RU2398095C1 |
