煤层气井排采强度对产气量敏感性的数值模拟  

Sensitivity numerical simulation of production intensity on the gas production rate of CBM wells

作　　者：谢学恒[1] 樊明珠 王前阔 杨焦生[3] 雷波[4] 

机构地区：[1]中海油能源发展股份有限公司监督监理技术分公司,天津300452 [2]亚美大陆煤层气有限公司,北京100004 [3]中国石油勘探开发研究院廊坊分院,河北廊坊065007 [4]中国矿业大学(徐州),江苏徐州221008

出　　处：《油气藏评价与开发》2013年第5期74-76,共3页Petroleum Reservoir Evaluation and Development

摘　　要：结合沁水盆地南部某煤层气区块的地质特征,利用Eclipse E300三维双重孔隙介质多组分模拟器,进行了煤层气井排采强度对产气量敏感性的数值模拟。研究发现,在给定的地质条件下,排采强度存在合理值。根据优选结果,日降液面速率以6 m/d起降;当井底流压接近0.8倍原始储层压力时,速率调整为4 m/d;当井底流压接近临界解吸压力时,速率调整为2m/d;进入稳产阶段时以1 m/d的速率排采,可以得到最好的产气效果。该结论对煤层气井的现场排采具有一定的参考意义。Combined with geological characteristics of some CBM block in southern Qinshui basin, the Eclipse E300 3D double po-rosity multicomponent simulator is used to carry out the sensitivity numerical simulation of production intensity on the gas produc-tion rate of CBM wells. The researches find out that, under the given geological conditions, the drainage intensity has reasonable value. According to the optimization results, daily liquid level reduction rate begins with 6 m/d. When the bottom hole flowing pres-sure （BHFP） is close to 0.8 times of the original reservoir pressure, the rate changes to 4 m/d. When BHFP is close to the critical de-sorption pressure, the rate changes to 2 m/d. When in the stable production stage, the rate changs to 1 m/d and the best gas produc-ing effect can be obtained. This conclusion has a certain reference value for the field production of CBM wells.

关 键 词：煤层气 排采强度 煤层气井 数值模拟 

分 类 号：TE132.2[石油与天然气工程—油气勘探]