摘要
近年来，我国油田套管损坏速度呈直线上升趋势，有的井不足1年时间，有的井刚完井1个月套管就坏了，给原油生产带来重大损失。套管损坏，一是套管柱设计不合理，特别是在盐岩、泥（页）岩地层，设计载荷偏小；二是不合理的注水，加速了套管的损坏；三是套管柱强度设计本来就不富余，射孔给套管带来一定的损害，加速了套管损坏；四是套管的外腐蚀使套管穿孔造成内腐蚀，腐蚀使套管更易损坏；五是油层出砂、固井质量、套管缺陷等使套管损坏。造成套管损坏的因素很多，具体到每口井必然有一些主要因素，找到主要因素才好采取防范措施。
Casing failure is increasing rapidly in recent years. Some wells,for instance, were found the casing damaged only a year or even a month after completion.It has caused great losses to oilfield's production. Those causes of casing failure are: 1. unreasonable design of casing string(especially in salt bed and mudstone (shale) formation); 2. unreasonable water injection; 3. casing Perforation; 4.corrosion; 5. sand problems, cementing quality and casing defect.
出处
《石油钻采工艺》
CAS
CSCD
北大核心
1996年第5期7-12,105,共6页
Oil Drilling & Production Technology
关键词
套管损坏
套管柱
设计
腐蚀
油田
油管
casing failure evaporite bed mudstone creep slippage casing string design casing perforating casing corrosion
