摘要
为了更好的提高页岩气藏水平井的产量,对页岩气水平井产水率进行数值模拟研究,考虑了页岩气启动压力梯度、解吸吸附和页岩气水平井产量等特征,运用数值模拟软件Eclipse建立相应的单井模型,并对影响页岩气水平井产能的部分因素进行了敏感性分析。研究结果表明:页岩气藏的单井控制可采储量有限,必须依靠在增加页岩气水平井分支井或者水平井数量,才能有效地提高页岩气藏的采收率;分段压裂压裂出的高导流能力的裂缝,在开采初期可以大幅度的提高页岩气水平井的产量,同时也提高了页岩气水平井的产水率,促使页岩气水平井过早见水;考虑页岩气吸附解析作用和降低页岩气水平井的日产量有利于减缓地层水的产出,减缓页岩气水平井产水率的上升速度,从而延长页岩气水平井的寿命,提高单井的最终采收率。
In order to enhance the horizontal well production in shale gas reservoir, water cut of horizontal weUs in shale gas reservoir was investigated, considering such characteristics as starting pressure gradient, gas desorption and horizontal gas well production, the Eclipse numerical simulation software was applied to establish a correspond- ing single well numerical model and some sensitivity analysis on production effect factors was conducted. The re- sults show that single well controlled reservoirs of shale gas reservoirs were low. In order to enhance the shale gas reservoir recovery, a possible way was increase the number of horizontal well or horizontal well branch. Fracture di- verting capacity has a great influence on horizontal well gas production and rapidly increased the gas production in initial gas reservoir exploitation, also rapidly increased water cut of horizontal gas well causing earlier water break- through. In order to reduce the formation water production and rate of water cut, considering shale gas desorption and decreasing the gas well daily production was necessary to extend the shale gas horizontal well production time and enhance the single well gas recovery.
出处
《延安大学学报（自然科学版）》
2016年第4期64-68,共5页
Journal of Yan'an University：Natural Science Edition
基金
延安市科技局油气资源开发与环境保护科技创新团队项目(2015CHTD-04)
延安大学专项科研基金项目(XDQ2016-35)
延安大学大学生创业创新项目(201610719024)
关键词
页岩气
水平井
产水率
吸附解析
数值模拟
shale gas
horizontal well
water cut
desorption
numerical simulation
