Technique Of Dual-string Steam Injection In Horizontal Well

Liaohe Oilfield SAGD project to promote the industrialization process, the horizontal wells are used sieve completion, the use of steam injection in general terms the process of steam injection, the reservoir heterogeneity and the surrounding recovery effects of partial penetration of steam into the level above severely affected the use of non-uniform the development level. In order to enhance the extent of the use of horizontal wells to increase oil production capacity to carry out the level of two-pipe steam injection wells and technological research.This paper introduces a dual-track principle of steam injection technology. Horizontal wells in dual-tube technology of the steam injection technology is insulated from large-caliber small-bore tube and inner tube no coupling shaft formed in the inner tube and two separate small annulus flow, steam on the ground after the distribution of horizontal wells from the heel and toe of steam injection, wellhead gas volume can be achieved with the dynamic adjustment.In this paper, two-pipe steam injection technology-related equipment has been studied mainly to achieve a perfect matching technology. Developed for reservoir development requirements of the Liaohe steam injection string, matching the corresponding twin-tube high-pressure steam injection wellhead. According to the distribution of well-head of steam technology needs, the development of dry steam, the flow metering device.In this paper, two-pipe steam injection technology on-site implementation of the follow-up analysis. Field data show that the level of two-pipe steam injection wells through the field test technology has achieved good results, so that the degree of horizontal wells has been used above any reasonable improvement.