黄陇煤田煤层气储层特征

基于煤层气解吸和煤层试井等大量的实测数据,对黄陇煤田煤层的气含量、渗透率、储层压力和最小主应力等储层参数进行了研究。结果表明:黄陇煤田煤层气含量、渗透率较高;地应力较低;气含量、储层压力、最小主应力与煤层埋深呈正相关性;渗透率与最小主应力呈负相关性;渗透率与煤层埋深的关系不明显;最小主应力对储层压力影响明显。综合分析认为,煤层气含量和渗透率较高的彬长、焦坪矿区是煤层气开采最具有价值的区块。 

Characteristics of CBM reservoir in Huangling-Longxian coalfield

Based upon large amounts of measurement data of desorption and well test, studies of the reservoir parameters such as the gas content, the permeability, the reservoir pressure, the minimum principal stress in Huangling-Longxian coalfield were conducted. The results show that the gas content and the permeability are relatively high, the ground stress is relatively low, the gas content, the reservoir pressure and the minimum principal stress are positively correlated to the burial depth of coal seams, the permeability and the minimum principal stress are negatively correlated, relationship between the permeability and the seam depth is not obvious, the influence of the minimum principal stress on the reservoir pressure is evident. From the integral analysis, it is considered that Binxian and Jiaoping mining area with relatively high CBM content and permeability are favorable block for CBM exploitation.