广安002-H1井长水平段筛尾管下入技术

Application of screen liner running-in in the well 002-H1,Guang'an Structure,Sichuan Basin

四川盆地广安构造广安002-H1井完钻井深4055m,水平位移2499.13m,其中水平段长2010m,最小井斜为87°、最大井斜为91.96°,创川渝气区水平段最长的纪录。该井是典型的短直井段、长水平段水平井,下钻至井深3300～3500m就不能正常下入,必须通过旋转、划眼才能下钻至井底。为了确保139.7mm筛尾管能顺利下入,进行了下入条件计算和下入难度分析,采用滚轮扶正器模拟刚度通井、增加下入推力等技术措施,顺利地把139.7mm筛尾管下至井底。该技术为短直井段、长水平段水平井筛尾管下入设计和施工积累了经验。

The well 002-H1 in the Guang'an Structure of the Sichuan Basin is 4055 m in depth,with a horizontal displacement of 2499.13 m,a horizontal segment length of 2010 m which is the longest one among Sichuan and Chongqing oil and gas fields,and a hole deviation angle of 87° at the minimum and 91.96° at the maximum.This well is a typically short,straight and horizontal well,with a long horizontal segment.When the drilling came to 3300-3500 m in depth,the further work can not proceed normally,so rotating and redressing were required for drilling to the well bottom.In order to make sure that screen liner with a diameter of 139.7 mm can run down into the well smoothly,we made a calculation about the conditions and an analysis of the difficulty of the running-in work,and then took some technical measures accordingly:the casing running work with roller centralizers was first simulated,and the screen liner running-in was practically done by adding the pushdown power.The successful application of this technology provides reference for the construction and design of screen liner running-in for the horizontal wells with short and straight or long horizontal segments.