海上多元热流体热采工艺应用方法研究与实践

Research and Practice of Application Method for Thermal Recovery Technology for Offshore Multiple Thermal Fluid

热力采油是稠油开发中最主要的开采方式,中国海上稠油储量大,稠油油田的合理高效开发,对海上油田的增产稳产具有重要意义。受海上特殊的自然环境、空间等条件限制,直到2008年,我国才在渤海湾南堡油区完成了海上第一口热采井的先导性试验项目,填补了国内海上稠油热采领域的空白,为多元热流体热采技术的发展和现场应用积累了经验。从多元热流体吞吐热采机理、多元热流体设备改造及作业流程设计、制氮设备在多元热流体吞吐热采中的应用、注入热流体管线的设计和预制、热采井口及井筒结构设计、多元热流体吞吐注采方案、多元热流体吞吐热采施工程序、多元热流体吞吐热采经济评价等方面,介绍了我国第一口海上多元热流体吞吐作业的工艺设计方法和实施方案。实施海上多元热流体吞吐热采工艺,对改善海上稠油开发效果、促进海上稠油高效开发具有指导作用。

Thermal recovery is the main way of exploitation of the heavy oil development.Because there are huge reserves of offshore heavy oil in China ,and a reasonable and efficient development of it is important for the stable production of the offshore oil fields.For the restriction by the special environment of offshore platform,until 2008 pilot project of the first offshore thermal recovery well has been completed in Nanpu oil- field,Bohai Bay ,which fill the gaps in the domestic thermal recovery for the offshore heavy oil and accumu- lated rich experiences for the development of technology of multiple fluid thermal recovery and field appliea- tion.This paper introduces the technological design method and the implementation of the first multiple ther- mal fluid huff and puff in Chinese offshore from many aspects ,such as thermal recovery mechanism of huff and puff,equipment reform and operation process design,application of nitrogen gas generation system to the huff and puff of the multiple thermal fluid ,design and prefabrication of the pipelines with injected thermal fluid ,structure design of thermal wellhead and borehole ,injection-production project and operational procedure and economic evaluation of the huff and puff of the multiple thermal fluid.The application of the thermal re- covery technology by huff and puff of the offshore multiple thermal fluid may play the role of guidance on improving development effect and promoting high efficiency production of the offshore heavy oil.