The feasibility of in-situ steam injection technology for oil shale underground retorting
The feasibility of in-situ steam injection technology for oil shale underground retorting
复制标题
油页岩地下干馏原位注蒸汽技术的可行性
DOI：
10.3176/oil.2020.2.03
复制
发表时间：
2020-01-01
期刊：
影响因子：
1.9
通讯作者：
Zhao, Jing
中科院分区：
文献类型：
--
作者：
Kang, Zhiqin;Xie, Huanyu;Zhao, Jing
介绍了油页岩地下注蒸汽开采技术的基本原理，分析了相关工艺流程。蒸汽的对流传热提高了油页岩层的加热效率，缩短了有机质达到完全热解的时间。在蒸汽的作用下，油气运移能力提高，油气产品更快地被带出生产井。此外，通过使用过热蒸汽（高达570 ℃）热解油页岩，油回收率超过95%，单位质量产气量为0.041 m3/kg，同时，油气产品的质量大大提高。注蒸汽数值模拟结果表明，MTI技术是一种快速、有效的油页岩地下开采方法，采用注、采威尔斯井交替注蒸汽，可实现油页岩地下开采的油气提取。结果表明，对于井距为50 m的油页岩油藏，MTI技术的开发周期仅为300 d左右，油页岩层的顶底板起到了隔热隔汽的作用。未来MTI技术的成功工业化实施将缓解中国日益严重的能源危机，减少中国对进口石油的依赖。
The basic principles of in-situ steam injection technology (MTI) for oil shale underground retorting were presented and related technical processes were analyzed. The convection heat transfer of steam enhanced the efficiency of heating the oil shale layer, which shortened the time to achieve a complete pyrolysis of organic matter. Under the influence of steam the migration capacity of oil and gas improved and the oil and gas products were carried out of the production well more quickly. Moreover, by using superheated steam (up to 570 degrees C) to pyrolyze oil shale, the oil recovery rate exceeded 95%, and the gas production per unit mass was 0.041 m(3)/kg, at the same time, the quality of oil and gas products greatly improved. The proportion of light oils accounted for 75.38%, and the yield of H-2 and CO in pyrolysis gases was increased The numerical simulation of steam injection indicated that the MTI technology was a rapid and efficient method for oil shale underground retorting to extract oil and gas by using the injection and production wells alternately for injecting steam. It demonstrated that the development period of the MTI technology was only about 300 days for an oil shale reservoir with a well spacing of 50 m, and the roof and floor of the oil shale layer served as thermal and steam insulation. The successful industrial implementation of the MTI technology in the future should alleviate the increasing energy crisis in China and reduce the country's dependence on imported petroleum.