生物成因煤层气的生成及其资源意义

Generation of Biogenic Coalbed Gases and Its Significance to Resources

生物成因煤层气一般可分为原生和次生生物成因,它们在生成机理上有许多相似之处,但也有所不同,导致后期保存和同位素组成上的差异。研究指出,原生生物成因气不能被大量保留在煤层中,气田中的生物成因气多为次生生物成因气;次生生物成因煤层气分布比较普遍,含量较为丰富,且生物成因煤层气埋藏深度浅,勘探成本低,因此次生生物成因煤层气具有不容忽视的巨大资源潜力。

Biogenic coalbed gases can be divided into primary biogenic gases and secondary biogenic gases. They have many similarities and alo show some differences in the generation mechanism. studies on biogenic gases in coalbed gases reservoir indicate that primary biogenic gases cannot be preserved on a large scale in coal seams. Biogenic gases of coalbed gases reservoir are mostly secondary in origin.Secondary biogenic coalbed gases distribute widely and are commonly rich in contents.Moreover,the exploration cost for biogenic coalbed gases is relatively low because of their shallow buried depths.Thus, secondary biogenic coalbed gases would be a huge potential resource.