CAJ | 학술논문

珲春盆地煤层气取得工业突破对我国低煤阶含煤盆地的煤层气勘探具有重要意义。通过对珲春盆地低煤阶煤层气成藏条件的深入剖析，探讨了低煤阶煤层气富集的主控因素及其成藏模式。结果表明，珲春盆地具有煤阶低、煤层多、煤层薄的特点，构造作用、沉积特征和岩浆岩侵入是其富集成藏的主控因素。盆地西部的褶皱和断层伴生带不仅为生物气创造有利环境，而且为煤层气二次成藏提供场所，形成“连续褶皱”富气模式；沼泽和天然堤微相的垂向叠置，使得作为煤层直接顶底板的泥岩和致密砂岩对煤层气起到更好的封闭作用；局部辉绿岩侵入体促使煤层再次生气，同时大大改善了煤岩的物性。因此，珲春盆地西部是煤层气高产富集区，具有巨大勘探开发潜力。
혼춘분지매층기취득공업돌파대아국저매계함매분지적매층기감탐구유중요의의。통과대혼춘분지저매계매층기성장조건적심입부석，탐토료저매계매층기부집적주공인소급기성장모식。결과표명，혼춘분지구유매계저、매층다、매층박적특점，구조작용、침적특정화암장암침입시기부집성장적주공인소。분지서부적습추화단층반생대불부위생물기창조유리배경，이차위매층기이차성장제공장소，형성“련속습추”부기모식；소택화천연제미상적수향첩치，사득작위매층직접정저판적니암화치밀사암대매층기기도경호적봉폐작용；국부휘록암침입체촉사매층재차생기，동시대대개선료매암적물성。인차，혼춘분지서부시매층기고산부집구，구유거대감탐개발잠력。
To obtain the industrial breakthrough of coalbed methane in Hunchun basin hasgreat significance for the exploration of coalbed methane(CBM) in China’s low rank coal basins. Through the deepened analysis on the res-ervoir-forming conditions of coalbed methane of low rank coal in Hunchun basin, the paper discussed the major controlling factors of CBM enrichment of low rank coal and its reservoir-forming model. The results show that Hunchun basin is characterized by low coal rank, multiple and thin seams. There are three main control factors for CBM accumulation, including tectonic setting, sedimentary characteristics and magmatic rock intrusion. The area with faults and folds in the west of the basin has not only created the favorable environments for biogas, but also provided the place for secondary reservoir forming, eventually forming the gas enrichment model of "continuous fold". The vertical superimposition of microfacies of marshes and natural levee which made mudstone and dense sandstone as the direct roof and floor of coal seams have better sealing effect for CBM, local diabase intrusion inside coal seams made again hydrocarbon to be generated, and greatly improved the physical properties of coal. Therefore, the west of Hunchun basin is an area rich in CBM and has a great potential for exploration and development.