胜利浅海探井井身结构优化及风险分析

Exploration Well Structure Optimization and Risk Study in Shengli Offshore Area

王孝山 王鼎杨 秦丙林

WANG Xiaoshan WANG Dingyang QIN Binglin

中国石化集团上海海洋石油局, 上海 200120; 中海油能源发展工程技术分公司, 塘沽 300452

SINOPEC Shanghai Offshore Petroleum Bureau, Shanghai 200120, China; CNOOC Ener-Drilling & Production Co., Tanggu 300452, China

在胜利浅海探井作业过程中,随着钻井技术的成熟和新工艺的采用,井身结构不断发生变化,从最初的660.4mm×444.5 mm×311.2 mm×215.9mm×152.4 mm井身结构发展到近期使用比较成熟的914.4 mm×444.5 mm×311.2mm×215.9 mm×152.4 mm,这两种井身结构使用多重套管对薄弱地层进行封固,规避了钻井风险,井下安全得到了很大的保证,在中深井和深井得到普遍的应用。从2006年H9井中深井开始,采用原在浅井中使用的914.4 mm×444.5mm×241.3 mm×152.4 mm井身结构进行钻进,获得了成功,并逐步应用到其它的探井。这种井身结构采用长裸眼井段钻进设计,缩短了钻井周期,提高了作业效益。同时也增加了钻井风险。

With the development of drilling technology, well structure has been changed repeatedly in Shengli offshore area. From 660.4 mm×444.5 mm×311.2 mm×215.9 mm×152.4 mm to the recent use of mature 914.4 mm×444.5 mm×311.2 mm×215.9 mm×152.4 mm well structure, they have been widely used in middle-deep wells and deep wells, the multiply casing has been used to protect the weak formation and avoid the drilling risk. But in the year of 2006, a new well structure of 914.4 mm×444.5 mm×241.3 mm×152.4 mm had been used in H9 well and got success. From then on, it gradually applied to other wells. With the long open hole design been used, it can shorten the drilling period, improve the company's benefit, meanwhile, it also increases the drilling risk.

https://doi.org/10.3969/j.issn.1008-2336.2015.03.072