宣化-下花园煤田煤层气地质条件及资源勘查潜力评价

CBM Geological Condition and Resource Exploration Potential Assessment in Xuanhua-Xiahuayuan Coalfield

通过对宣化-下花园煤田各主要煤储层地质条件、生气特征、含气性特征及储层物性特征等的综合评价,认为宣化-下花园煤田各主要煤储层具有厚度较大、变质程度适中、气含量及甲烷组分含量高,煤体结构好、处于超压异常状态,对后期开发有利,但煤储层孔渗性较低,需经后期压裂、注水等对其进行改造,方能实现产业化开发。今后仍需进一步加大勘查及研究力度,系统、全面的摸清区内煤层气资源勘探开发前景,寻求适宜的开发途径。

Through comprehensive assessment of coal reservoir geological condition,gas-forming,gas-bearing and reservoir physical property characteristics in the Xuanhua-Xiahuayuan coalfield,considered that the main coal reservoirs in the coalfield have larger thickness,moderate metamorphism degree,high gas content and methane component content,good coal mass structure,and in a overpressure situation,thus favorable for later exploitation.But because of lower permeability of coal reservoir,thus later stage transformation of hydraulic fracturing,water injection should be carried out,so that industrial exploitation can be achieved.From now on,to strengthen exploration and research dimensions,systematically,roundly feel out CBM resource exploration and exploitation prospect in the study area,thus appropriate exploitation approaches can be found out.