关于采用非常规套管程序改进四川深井井身结构设计的探讨

IMPROVING OF HOLE STRUCTURAL DESIGN FOR DEEP WELL IN SICHUAN BY USING UNCONVENTIONALITY CASING PROCEDURE

井身结构设计是钻井工程的基础设计,四川地区深井超深井长期局限于单一的Φ508×Φ339.7×Φ244.5×Φ177.8×Φ127常规套管程序,不能满足复杂地质条件下深井超深井科学设计井身结构的要求。开展非常规套管程序与相应井身结构的研究,探索采用API标准非常用套管和非API标准套管的井身结构方案,使井身结构设计更具灵活性,增加可用套管层次以增强应对地质与工程风险的能力和提高钻井工程质量,对提高四川复杂地质条件深井超深井钻井整体效益是非常必要的。

Hole structural design is foundation design of drilling engineering.The conventional casing programme restricted to unitary 508×339.7×244.5×177.8×127 in deep and superdeep well of Sichuan area in long time,it could' t meet the requirement of hole structural design under complicate geologic condition.The paper studied the unconventional casing programme and corresponding hole structure.The hole structural design was more flexibler by using API untypic casing and ordinary casing as casing programme.It is very important to increase drilling engineering quality and total drilling benefit during deep and superdeep well drilling under complicate geologic condition in Sichuan.