FIELD: oil-and-gas industry.
SUBSTANCE: for the method execution descent the casing string into borehole, equipped with a shoe nozzle with a return valve, one directional valves, and install them on the reservoir bottom level. Install a parker unit and a stepped cementing sleeve over the reservoir roof. After the production string descending inject a washing fluid inside it, the first portion of a cement slurry and sealing solution, separating them with a cementing plug. Over flush the cement in to the hole clearance till the plug settled into retune valve seat. Then gradually increasing pressure open a puckering unit, pump through valves the sealing solution and the second portion of the cement slurry, which over flushes the liquid volume.
EFFECT: reservoir selective sealing efficiency increase, avoids the sealing solution pass through hole clearance towards to the top, cement rock presents behind the production string over the reservoir.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR SELECTIVE ISOLATION OF PRODUCTIVE RESERVOIR AT CEMENTATION OF PRODUCTION STRING | 1993 |
|
RU2087674C1 |
| METHOD OF PRODUCING FORMATION ISOLATION IN CEMENTING OF CASING STRING | 2001 |
|
RU2189431C1 |
| METHOD OF PRODUCING FORMATION INSULATION DURING CEMENTATION OF CASING PIPE | 2006 |
|
RU2330933C1 |
| METHOD OF PRODUCTIVE STRATUM ISOLATION DURING CEMENTING CASING PIPE | 2001 |
|
RU2234593C2 |
| METHOD FOR PAY ISOLATION AT CASING CEMENTING | 2006 |
|
RU2326230C1 |
| WELL CEMENTING METHOD UNDER CONDITIONS OF ABNORMALLY LOW RESERVOIR PRESSURES | 2021 |
|
RU2775319C1 |
| METHOD FOR STEPPED CEMENTATION OF WELL IN HIGHLY PENETRABLE GAS-SATURATED COLLECTORS | 2003 |
|
RU2241819C1 |
| METHOD OF WELL STAGE CEMENTING UNDER CONDITIONS OF ABNORMALLY LOW FORMATION PRESSURES IN LOST CIRCULATION ZONE | 2000 |
|
RU2188302C2 |
| METHOD OF GAS WELL COMPLETION | 2013 |
|
RU2534548C1 |
| FILTER-SAFETY VALVE | 0 |
|
SU1102903A1 |
