临兴地区非常规天然气合探共采地质条件分析

Geology condition analysis for unconventional gas co-exploration and concurrent production in Linxing area

临兴地区位于鄂尔多斯盆地东缘河东煤田中部,前期勘探和试井生产显示该区块具有良好的煤层气、页岩气和致密砂岩气资源前景。通过对3种非常规天然气资源勘探和开发地质条件的系统分析,结果表明,临兴地区具有煤层气、页岩气和致密砂岩气优越的成藏条件和良好的配置关系,煤层—页岩—致密砂岩3种储层中天然气连续聚集成藏,受物质基础和保存条件的影响,不同的层位和构造位置上存在差异。提出了该地区非常规天然气的勘探开发可遵循以下原则:东部浅层进行太原组煤层气、页岩气以及山西组煤层气的合探共采,西部深层集中进行山西组页岩气、致密砂岩气以及太原组致密砂岩气的合探共采。从而为该地区非常规天然气的利用提供科学依据。

Linxing area locates in east margin of Ordos Basin and the middle of Hedong Coal Field, which show a good prospect for coalbed methane, shale gas and tight gas development from the former exploration work and well test. Analyse the gas reservoir exploration and development geology of three kinds of unconventional gases, Linxing area posses advanced reservoir condition and fine reservoir play of coalbed methane, shale gas and tight gas. Coal seam, shale and tight sand, all the three reservoir have continuous accumulation and reservoiring, though with diversity of formation and structural location by the influence of material basis and preserve condition. Propose the principle for unconventional gas exploration and development： East area proceed together exploration and development for coalbed methane and shale gas in Taiyuan formation, and coalbed methane in Shanxi Formation, the west proceed the exploration and development of shale gas and tight gas in Shanxi Formation, and tight gas in Taiyuan Formation. Thus provide a solid scientific foundation for co-exploration and concurrent production of uncon- ventional gas in Linxing area.