CAJ | 학술논문

单一煤层的煤层气资源丰度通常都比较低，且各向异性特征显著，为了提高单井产能，常把纵向上彼此邻近、特征相似的多个煤层组合在一起，以合采的方式进行开发。通过理论分析层间差异下的多层合采煤层气井开发动态，并基于韩城地区3号、5号和11号煤储层特征，经过分析该地区煤层气多层合采井的排采实例，对多层合采井的开发效果进行了评价。结果表明：低丰度煤层气藏的开发宜采用多层合采方式进行，但需注意多层合采的时机与顺序、水层倒灌与煤粉产出问题，应在生产过程中调整措施。
단일매층적매층기자원봉도통상도비교저，차각향이성특정현저，위료제고단정산능，상파종향상피차린근、특정상사적다개매층조합재일기，이합채적방식진행개발。통과이론분석층간차이하적다층합채매층기정개발동태，병기우한성지구3호、5호화11호매저층특정，경과분석해지구매층기다층합채정적배채실례，대다층합채정적개발효과진행료평개。결과표명：저봉도매층기장적개발의채용다층합채방식진행，단수주의다층합채적시궤여순서、수층도관여매분산출문제，응재생산과정중조정조시。
Coalbed methane reservoir is in low abundance and anisotropic. In order to improve the well productivi-ty, some thin layers are usually developed together, which are adjacent to each other vertically and have the similar characteristics. The multi-layer CBM wells’ production performance under the condition of interlayer differences has been studied using the reservoir parameters of seams No.3, 5, 11. Then the development effect has been evalu-ated according to the field data. The results show that multi-layer development is favorable for low-abundance coalbed methane wells. But there are three problems: the timing and sequence of multi-layer production, water flood backward and pulverized coal. Production measures should be regulated during production.