发明名称 |
METHOD OF CLEANING THE PRODUCING FORMATION BOTTOM-HOLE ZONE |
摘要 |
development of oil and gas deposits by wells; applicable in cleaning of bottom-hole zone of producing formation after well drilling. SUBSTANCE: method includes successive injection of selected portions of chemical reagents into bottom-hole formation zone. In so doing, prior to treatment of bottom-hole formation zone and after supply of every chemical reagent, zone supersaturated with gas built up in bottom-hole formation zone by gas injection at pressure exceeding formation pressure. In this case, gas is supplied to bottom-hole zone at minimal flow rate, and supersaturated zone is built up with radius exceeding that of contaminated part of bottom-hole zone. After leaving the well to stand for time required for performance of reaction of chemical agents with producing well rocks and contents of porous medium, bottom-hole formation zone is cleaned from reaction products by putting well into operation. EFFECT: higher efficiency of cleaning of bottom-hole zone of producing formation from filtrate of drilling mud and reaction products. 1 ex
|
申请公布号 |
RU2189442(C2) |
申请公布日期 |
2002.09.20 |
申请号 |
RU20000127251 |
申请日期 |
2000.10.31 |
申请人 |
ZAKRYTOE AKTSIONERNOE OBSHCHESTVO "NEFTEGAZOVAJA K;OMPANIJA STROJTRANSGAZ OJL |
发明人 |
VJAKHIREV V.I.;DOBRYNIN N.M.;ZHBAKOV V.A.;MINLIKAEV V.Z.;OTT V.I.;REMIZOV V.V.;SOLOGUB R.A.;TUPYSEV M.K. |
分类号 |
E21B43/27;E21B43/25;(IPC1-7):E21B43/27 |
主分类号 |
E21B43/27 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|