摘要
借鉴常规气井和北美页岩气井产量典型递减规律,应用四川盆地页岩气田焦石坝区块9口具有地质、工艺参数、试采特征等代表性的典型井实际生产数据,初步建立了该区块页岩气井产量递减典型曲线。在排除不同生产制度、频繁调配产、关井等因素的影响条件下,采用归一化拟产量和物质平衡时间建立关系,提出了合适的双曲递减典型曲线、递减指数、递减率;建立了页岩气井A50、A30、A20产量典型递减曲线,分析了影响页岩气井产量递减典型曲线的因素,结合实际论证了产量递减典型曲线在区块的代表性,并应用产量递减典型曲线评估单井产能和可采储量。
In this study, some production-decline laws are summarized by means of comparing conventional gas wells with shale gas wells in North America. Moreover, taking 9 shale gas wells from Jiaoshiba block in Fuling area as examples, we established their typical curves of production decline. Eliminating the effects of the different production systems, frequent adjustable allocation, and shut in, suitable typical curves of hyperbolic decline, decline index, and decline rate are presented through a relationship between normalized pseudo yield and material-balance time. Typical curves of A 50, A 30, and A 20 are built and factors affecting these curves are analyzed. In addition, both deliverability and recoverable reserves are evaluated by adopting these curves.
出处
《天然气勘探与开发》
2016年第2期36-40,11,共5页
Natural Gas Exploration and Development
关键词
页岩气
产量递减
双曲递减
递减指数
递减率
shale gas
production decline
hyperbolic decline
decline index
decline rate
