[1]谢德湘,靳凯,易志东,等.考虑多效应作用的页岩气变流量压力数据分析方法[J].油气井测试,2018,27(03):14-21.[doi:10.19680/j.cnki.1044-4388.2018.03.003]
　XIE Dexiang,JIN Kai,YI Zhidong,et al.Pressure data analysis method for shale gas in production with variable rate with consideration of multieffect[J].Well Testing,2018,27(03):14-21.[doi:10.19680/j.cnki.1044-4388.2018.03.003]
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考虑多效应作用的页岩气变流量压力数据分析方法()
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《油气井测试》[ISSN:1006-6977/CN:61-1281/TN]

卷:
27
期数:
2018年03期
页码:
14-21
栏目:
出版日期:
2018-06-25

文章信息/Info

Title:
Pressure data analysis method for shale gas in production with variable rate with consideration of multieffect
文章编号:
1004-4388(2018)03-0014-08
作者:
 谢德湘1; 靳凯1; 易志东2; 徐瑶1; 周鸿城1
1.赣中南地质矿产勘查研究院，江西南昌，330026
2.江西省国土资源厅，江西南昌，330025
Author(s):
XIE Dexiang1;  JIN Kai1;  YI Zhidong2;  XU Yao1;  ZHOU Hongcheng1
1. Ganzhongnan Institute of Geology and Mineral Exploration, Nanchang ， Jiangxi 330026, China
2. Department of Land and Resources of Jiangxi Province, Nanchang ， Jiangxi 330025, China
关键词:
页岩气; 生产数据分析; 物质平衡拟时间; 归一化压力; 产量; 压裂; 吸附
Keywords:
 ; shale gas;  production data analysis;  matter balance pseudotime;  normalized pressure;  production rate;  fracturing;  adsorption
分类号:
TE353
DOI:
10.19680/j.cnki.1044-4388.2018.03.003
文献标志码:
A
摘要:
页岩气是世界基础资源的重要组成部分，由于页岩气井试井测试资料较少，难以对地层开展评价，利用页岩气生产数据评价地层对页岩气的开发具有重要的指导意义。考虑页岩气吸附、压敏、扩散及渗流等效应，通过定义物质平衡拟时间、归一化压力与产量等参数，将复杂的页岩气流动方程线性化，通过定义无量纲量，形成无量纲化的流动方程并求解，得到页岩气井底压力及产量表达式，绘制了用于生产数据分析的归一化压力或产量图版。利用变流量的压力图版，采用曲线拟合方法解释出渗透率、裂缝半场等参数。利用解释结果、压力及产量表达式分析了双对数图版中典型的流动段，研究了裂缝条数、裂缝半长及气体吸附的Langmuir参数对产量的影响。结果表明，随着裂缝条数和裂缝半长的增加，页岩气日产量增加，但与日产量之间不是线性增长关系，需要对压裂规模进行优化；在压力较高时，Langmuir压力常数和Langmuir吸附常数对产量影响较小。
Abstract:
Shale gas is an important part of the world’s basic resources. For lack of well testing data for shale gas well to evaluate the formation, it may be feasible to use the production data to do that. Based on the shale gas adsorption, pressure sensitivity, diffusion and seepage effects, the complex shale gas flow equation was linearized by defining the material balance pseudotime, normalized pressure and flow parameters. In addition, a nondimensional flow equation was formed by defining a dimensionless quantity and the bottomhole pressure and flow rate expressions of the shale gas well were obtained by solving the equation. Thus, a normalized pressure or production rate chart for the production data analysis was established. The typical flow section in the loglog plot was analyzed based on the pressure and flow rate expressions. Meanwhile, the effects of the number and halflength of fractures, and the Langmuir parameters of gas adsorption on the flow rate were studied. The results show that the daily production of shale gas increases with the increase of the number and halflength of fractures, but they do not show a linear growth relationship. Therefore, the fracturing scale needs to be optimized. It is also found that the Langmuir pressure constant and the Langmuir adsorption constant have little effect on the production when the pressure is relatively high.

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备注/Memo

备注/Memo:
2017-08-23收稿, 2017-11-27修回, 2018-01-25接受, 2018-06-15网络版发表
中国石油科技创新基金“孔压下超临界CO2压裂液对页岩气储层力学特性影响”（2017D-5007-0313）
谢德湘，男，1963年出生，高级工程师，1979毕业于赣州地质学校，现主要从事地质勘查及油气地质勘探工作。电话：18807910876；Email：382558132@qq.com。地址：江西省南昌市解放西路658号，邮政编码：330026。
更新日期/Last Update: 2018-08-09