摘要
页岩气单井开发成本较高,为了更有效地评价页岩气井经济效益,指导气田效益开发,本文以川南长宁、威远、昭通区块为例,分析页岩气井的开发特征,建立不同区块的典型生产特征曲线。结果表明,川南地区页岩气单井初始产量高,但首年递减速度快,气井一般没有稳产期,投产初期即开始递减,并且不同气井产能差异比较大,递减率相差也比较大。基于页岩气田的开发成本现状,采用净现金流量法开展了不同区块页岩气单井的经济效益评价和对比,构建了反映单井投资、价格、EUR、测试产量、首年平均日产和内部收益率等关键指标的经济效益分类图版。结论认为,通过文中的经济效益分类图版可以在当前气价和单井投资水平下开展页岩气井的经济效益快速评价,确定页岩气单井的类型,从而指导气田效益建产。
The development cost of a single shale gas well is relatively high.In order to effectively evaluate the economic benefits of the shale gas wells and guide the benefit exploration of gas fields,Changning,Weiyuan and Zhaotong blocks in southern Sichuan are studied as cases for analyzing the development charac-teristics of shale gas wells and establishing typical production characteristic curves of different blocks.The re-sults show that the initial production of a single shale gas well in southern Sichuan is high,but it declined rapidly in the first year.The production of gas wells declines at the beginning without stable period.Moreover,the productivity of different gas wells varies greatly,and the decline rate varies greatly too.Based on the current development cost of shale gas fields,the net cash flow method was used to evaluate and compare the economic benefits of single shale gas wells in different blocks.It makes economic benefit classification charts reflecting key indicators such as single well investment,price,EUR,test production,first-year average daily production,and internal rate of return.The conclusion is that the charts can be used to quickly evaluate the economic benefits of the shale gas wells under current gas prices and single well investment levels,and to determine the types of single shale gas wells,and to guide the efficient development of gas fields.
作者
姜馨淳
孙钦平
赵群
王天一
Jiang Xinchun;Sun Qinping;Zhao Qun;Wang Tianyi(Research Institute of Petroleum Exploration&Development,PetroChina,Langfang Hebei 065007)
出处
《中外能源》
2021年第8期43-50,共8页
Sino-Global Energy
基金
国家科技重大专项“四川盆地及周缘页岩气形成富集条件、选区评价技术与应用”(编号:2017ZX05035)。
关键词
页岩气开发
典型生产曲线
内部收益率
单井EUR
经济效益分类图版
shale gas development
typical production curve
internal rate of return
single well EUR
economic benefit classification chart
