阜康西部矿区煤层气井产能地质影响因素分析

Analysis on geological influencing factors of coalbed methane productivity in Fukang Western Mining Area

阜康西部矿区构造上位于准噶尔盆地东南缘博格达山山前断褶带,阜康向斜的仰起端。文章结合区内40余口井的测井、录井、分析化验、地震和排采数据等资料,以八道湾组A2煤层为例,通过统计、回归和对比分析方法,分析区内煤层气井产能地质影响因素。研究结果表明,煤层埋深、厚度、含气性、渗透率以及构造位置是影响区内煤层气井产能主控因素,针对不同井场进行排采制度的优化,以指导区内煤层气井的合理排采。同时,为后期的井位部署工作提供地质依据。

Fukang western mining area is located in the foot of the Bogda Mountain fault-fold belt and the Fukang syncline lift in the southeastern margin of the Junggar Basin. In this paper,combined with the logging,mud logging,test,seismic and drainage date of 40 exploration wells in this area,we take Badaowan formation A2 coal seam as an example,and analyze the geological factors influencing the productivity of CBM wells through statistical, regression and comparative analysis method. The results show that,the buried depth,thickness,gas content,permeability and structural position are the main controlling factors for the productivity of CBM wells in Fukang Western Mining Area,so that,the drainage system can be optimized according to the different well sites. The research results can guide the reasonable drainage of CBM wells and provide geological basis for the later well deployment.