Xi'an Research Institute,China Coal Technology and Engineering Group

基于对鸡西盆地煤层气开发地质条件、煤储层特征及煤层气资源潜力的分析,采用数值模拟方法,并结合鸡西盆地梨树井田地面煤层气井的工程试验,对该区煤层气资源开发潜力进行评价。结果表明:鸡西盆地煤层累计厚度大、埋深适中、变质程度较高,且煤体结构、渗透性及含气性相对较好,煤层气资源丰富,有利于煤层气勘探开发;同时通过工程试验实现了单井稳定产气量突破2 000 m3/d的工业性气流,且具有稳产高产时间长,预测采收率高的煤层气开发特征,具有良好的煤层气资源开发前景;鉴于该区地形交通条件的制约,建议采用"地面垂直井为主丛式井为辅"的开发方式对该区进行滚动式开发。

Based on analysis on geological conditions of coalbed methane development,coal reservoir features and coalbed methane resource potential in Jixi Basin,i n combination with engineering test of surface coalbed methane wells in Lishu Minefield of Jixi Basin,numerical simulation method was applied to the evaluation on the dev elopment potential of coalbed methane resources in the area.The results showed that the accumulated thickness of the seams in Jixi Basin was high,the depth of the seam s was moderate and the metamorphic degree was high.The seam structure,permeability and gas bearing were relative good and the coalbed methane resources were rich and favorable to the coalbed methane exploration and development.Meanwhile with the engineering test,a stable gas production from a single well reached an industrial ga s flow over 2 000 m3/ day and would have a long stable and high production. The coalbed methane development features with a high extraction rate were predicted and the coalbed methane development would have good prospects. Due to the limitation of the topography and transportation conditions in the area,a development mode with " sur face vertical wells as main and the cluster wells as auxiliary" was provided for the progressive development of the area.

国家科技重大专项资助项目(2011ZX05040-003)；