临兴区块深部煤层气富集规律与勘探开发前景

发布时间：2018-05-10 23:39

本文选题：临兴 + 煤层气　；参考：《煤炭学报》2016年01期

【摘要】：临兴地区位于鄂尔多斯盆地东缘,横跨晋西挠褶带和伊陕斜坡,东部断层发育,西部地层平缓,中部紫金山岩体侵入。煤层气富集受到构造、成熟度和水文地质条件的三重控制,较高的成熟度反映煤岩已经大量生烃;后期构造破坏煤层气藏,但地层水滞留,水文条件有利于煤层气保存。含气量呈现东低西高的整体趋势。中部紫金山热液作用和断层破坏作用形成了环形含气量低值区和高值区。区内含气饱和度总体受到成熟度的控制,与含气量总体规律不一致,研究区中部出现含气饱和度高值窗口(1 600~2 000 m)。本区煤岩微孔发育,煤岩孔隙的差异小,结构相对均匀,整体扩散性和渗透性较强。总体评价该区煤层气资源量大、丰度高、含气饱和度高和物性较好。在评价有利区具备进一步开展先导试验的条件。
[Abstract]:Located in the eastern margin of Ordos Basin , the Linxing area is located across the eastern part of the western part of the western part of the Ordos basin . The eastern faults are developed , the western stratum is gentle , and the middle part of the Zijinshan rock body is invaded . The coal bed methane enrichment is controlled by the structure , maturity and hydrogeologic conditions . The coal bed methane enrichment is controlled by the structure , maturity and hydrogeologic conditions . The gas saturation in the central part is favorable for the preservation of coal bed gas . The gas saturation in the central part is controlled by the maturity , and the gas saturation in the middle part of the study area is not consistent with the general rule of gas content . The porosity of the coal - rock in this area is small , the porosity of the coal - rock is small , the structure is relatively uniform , the integral diffusivity and the permeability are stronger . The overall evaluation of the coal - bed gas resources is large , the abundance is high , the gas - bearing saturation is high and the physical property is good . The favorable area of the evaluation is provided with the conditions for further conducting pilot test .

【作者单位】：中联煤层气有限责任公司;
【基金】：国家科技重大专项资助项目(2011ZX05062) 中海油总公司科研资助项目(鄂尔多斯盆地东北缘中深层煤层气勘探潜力评价与开发可行性研究)
【分类号】：P618.13

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