煤层气体积压裂施工参数优化  

Construction parameter optimization of coalbed methane volume fracturing

作　　者：彭鹏[1] 杨兆中[1] 梅永贵 郭简 李小刚[1] 路艳军[1] 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500 [2]中国石油山西煤层气勘探开发分公司,山西晋城048000

出　　处：《油气藏评价与开发》2015年第6期68-72,共5页Petroleum Reservoir Evaluation and Development

摘　　要：我国煤层气藏具有低压、低饱和、低渗透、非均质性强、储层构造复杂、临界解吸压力低的特点。山西沁水盆地煤层气井经过常规的压裂技术改造后,依旧产量低下、产量递减速度快。为了提高单井产量,借鉴页岩气井的体积压裂技术。选用一口井作为模拟井采用体积压裂技术,优选出一组施工参数为:800 m3液量规模,45%的前置液比例,4.5 m3/min的前置液排量,7 m3/min的携砂液排量,8%的平均砂比并采用2个段塞。对X井进行现场施工,实际施工参数与模拟出的施工参数较符合,根据排采曲线可得日产量达900 m3,结果表明,使用体积压裂技术增大改造体积,提高单井产量,对煤层气的开采具有广泛的推广意义。The coalbed methane（CBM） in China has many characteristics, such as low pressure, low saturation, low permeability, strong aeolotropism, complex reservoir structure and low critical desorption pressure. Although conventional fracturing technology reform was implemented in CBM wells of Qinshui basin in Shanxi Province, the production was still low and declined rapidly. In or- der to improve per well production, this paper drew lessons from volume fracturing technology of shale gas wells, Choose a well as a simulation well and volume fracturing technology was adopted. A set of construction parameters were selected, involving 800 m3 flu- id volume, 45 % ahead fluid, 4.5 m3 min ahead fluid volume, 7 m3/min sand carrying agent, 8 % average proppant concentration and two slugs. Field construction of well X shows that, the actual parameters correspond with simulated parameters, and daily pro- duction reaches 900 m3 according to production curves. The results indicate that volume fracturing technology can increase reser- voir volume and oer well oroduction, thereby orovidinz references for CBM exoloitation.

关 键 词：煤层气 体积压裂 施工参数 

分 类 号：TE371[石油与天然气工程—油气田开发工程]