Petroleum Accumulation Feature and History of Upper Paleozoic, Ordos Basin
详细信息
- 责任者：Wu Qing (Research Center of Geosciences Development ; China University of Geosciences ; Beijing 100083 ; China) ; Xu Huazheng
- 刊名：Petroleum Geology & Experiment
- 出版年：2013
- 卷期：35(5)
- 关键词：深盆气 ; deep-basin gas ; 鄂尔多斯盆地 ; Ordos Basin
- 页码：p.505-510
- 图表：5 illus., 13 refs.
- 分类号：1003
- issnNo：ISSN1001-6112
- isbnNo：CN32-1151/TE
摘要
During the early burial period,the ground water of coal series in the Ordos Basin became weakly acidic,due to the release of organic acids from coal. The corrosion of oxygen-containing carboxylic acid then generated a large number of pores in aluminum silicate and made sandstone easily to be compacted. The following rise of formation temperature promoted the Al3 +and Si2 +complexation reduce to SiO2,clay and ferrocalcite,which led to the regional sandstone densification. From the Late Jurassic to the Early Cretaceous,tectonic- thermal events resulted in the hydrocarbon generation of coal series and the vaporization of formation water,which promoted highpressure fluid( methane and steam) flood the whole storage box. A basin-scale high-temperature and high-pressure gas reservoir was founded. From the Late Cretaceous to Paleocene,the regional uplift and erosion of strata made the coal series burial depth decrease and the geothermal gradient decrease,so that vapor condensated into water,while the CH4gas retained gradually. High-temperature and high-pressure gas reservoir was transformed into low-temperature and under-pressure reservoir.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |