双管脉冲注汽技术在Girasol油田的研究应用

The Application of Double Tube Pulse Steam Injection Technology in Girasol Oilfield

水平井技术是提高油井产量的有效工艺。哥伦比亚圣湖能源公司Girasol的稠油油田,水平井段在600 m以上。使用常规蒸汽吞吐注入工艺时,蒸汽的有效作用半径只在水平井跟部,将近2/3的水平井段蒸汽根本无法有效加热。从而造成油田储量动用程度低,影响开发效果。油田引入双管脉冲均匀注汽工艺技术,利用井下蒸汽分配装置和脉冲双管注汽管柱,使水平井跟部和趾部同时注汽,实现了整个储层段均匀注汽,提高了开发效果。该工艺分别在Girasol、Abarco、Under River油田进行了应用,均取得较好效果,在同类油田中具有推广价值。

Horizontal well was an effective technology to improve the production in oil wells.In Girasol heavy oilfield of Mansarovar Energy Colombia Ltd,the length of horizontal section is over 600 m.When the conventional steam injection technology was used,the effective operation radius of steam injection was only at the heel of horizontal well,thus 2/3 of the horizontal section could not be effectively heated.Therefore the effective reserves'producing was low in the oilfield and the effect of oilfield development was influenced.For this reason,a double tube pulse steam injection technology was introduced in Gireasol Oilfield,and downhole steam distribution device and double tube pulse steam injection tubing string were used for steam injection from heel and toe simultaneously of the horizontal well for the realization of even steam injection and even distribution of oil production.This technology has applied in Girasol,Abarco and Under River oilfields,good results are all achieved.It has good promotion value and application prospects in steam injection of long horizontal wells.