中原油田二次完井与配套技术

SECONDARY CEMENTING IN CASED WELLS IN ZHONGYUAN OILFIELD AND AUXILIARY TECHNOLOGIES

向绪金 陈书庆 韩金献 庞枫 杨铃 靳秀兰

Xiang Xujin Chen Shuqing Han Jinxian Pang Feng Yang Ling Jin Xiulan

中原油田公司, 河南濮阳 457001 华北石油职业技术学院, 河北任丘 062552

中原油田套管损坏井约占生产井总数的20%,且套损井段分布距离长,跨度大,从井深400m至生产井段均有套损现象发生,严重地影响着增产增注措施的实施和注采井网的完善。常规的套管补帖和取换套技术不能解决套管长距离破漏穿孔的难题,为此,决定采用下小套管二次固井完井工艺,在已损坏或管壁变薄的Ф139.7mm油层套管内全井下Ф101.6mm套管或局部悬挂套管二次固井完井,配套开发了高温延迟水泥浆、系列Ф101.6mm套管,采用了延迟固井工艺及小套管内射孔、注采、修井等技术,对修复套损井、细分层系、改善吸水剖面、完善注采井网、实施增产增注、恢复储量、提高经济效益有重要意义。

In Zhongyuan oilfield, casing damaged wells account for 20% of the total production wells, with casing damage happens in a long interval span from 400 m to pay zone, and this severely impacts the conduction of stimulations and improving of production/injection well pattern. As the conventional casing patching and replacing technology is insufficient enough for the long damaged interval, secondary cementing technology using small size casing is then presented, i.e., run Ф101.6mm casing in the damaged or thinned Ф139.7mm casing thoroughly or hang casing at certain locations. To assist the secondary cementing, high pressure time delay cement slurry, series Ф101.6mm casing were developed, time-delay cementing, small casing perforation, injection production and workover technologies were applied.

10.3969/j.issn.1000-7393.2004.04.007