[1]倪杰,杜洋,李莉.页岩气井产能动态评价技术[J].油气井测试,2021,30(06):61-65.[doi:10.19680/j.cnki.1004-4388.2021.06.011]
　NI Jie,DU Yang,LI Li. Productivity capacity evaluation technology of shale gas well[J].Well Testing,2021,30(06):61-65.[doi:10.19680/j.cnki.1004-4388.2021.06.011]
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页岩气井产能动态评价技术()
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《油气井测试》[ISSN:1006-6977/CN:12-1485/TE]

卷:
30卷
期数:
2021年06期
页码:
61-65
栏目:
出版日期:
2022-01-19

文章信息/Info

Title:
 Productivity capacity evaluation technology of shale gas well
文章编号:
1004-4388(2021)06-0061-05
作者:
倪杰; 杜洋; 李莉
 中石化西南分公司石油工程技术研究院 四川德阳 618000
Author(s):
 NI Jie;  DU Yang;  LI Li
 Petroleum Engineering Technology Research Institute, SINOPEC Southwest Branch, Deyang, Sichuan 618000, China
关键词:
 ; 页岩气储层; 致密气藏; 产能评价; 稳态渗流; 非稳态渗流; 一点法; 效果分析
Keywords:
 ; shale gas reservoir;  tight gas reservoir;  production capacity evaluation;  steady state seepage;  unsteady seepage;  one point method;  effect analysis
分类号:
TE344
DOI:
10.19680/j.cnki.1004-4388.2021.06.011
文献标志码:
B
摘要:
页岩气储层具有特低孔、特低渗特征，压力扩散速度慢，测试求产压力递减快，现场无法快速准确评价气井产能。采用稳态和非稳态渗流理论相结合的方法，以稳态渗流理论为基础，建立适用于不同页岩区块的产能计算公式。利用非稳态渗流理论，考虑不同产量下地层压力和井底流压随时间的变化，确定生产压差稳定时的压力作为产能计算时的输入值，确保产能计算的可靠性。对威荣-永川页岩区块8口井进行产能评价，与“一点法”计算结果进行对比，计算精度由597%提高到931%。页岩气井产能动态评价技术可为页岩气开发评价及方案制定提供可靠的理论技术支撑。
Abstract:
 Shale gas reservoir is characterized by ultralow porosity, ultralow permeability, slow pressure diffusion and rapid decline of test production pressure, which makes it difficult to evaluate the production capacity of gas wells quickly and accurately on site. Combining the steady state seepage theory and 〖JP〗unsteady seepage theory, this paper establishes the production capacity calculation formula suitable for different shale blocks based on the steadystate seepage theory. In addition, considering the changes of formation pressure and bottomhole flowing pressure with time under different production, the input value of production capacity calculation is determined as the pressure of stable production differential pressure according to the unsteady seepage theory to ensure the reliability of production capacity calculation. The production capacity of 8 wells in WeiyuanYongchuan shale block is evaluated by using the modified technology, and the results are compared with the calculation results of “one point method”. The results show that the calculation accuracy is improved from 597% to 931%. The production capacity evaluation technology of shale gas wells can provide reliable theoretical and technical support for shale gas development evaluation and scheme formulation.

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备注/Memo

备注/Memo:
 2021-03-12收稿，2021-10-25修回,2021-11-05接受,2021-12-20网络版发表
中石化科技部十条龙项目“威远-永川深层页岩气开发关键技术”（P18094）
倪杰，男，1981年出生，硕士，高级工程师，2007年毕业于西南石油大学油气田开发专业。目前主要从事采气工艺和动态评价工作。电话：13778230055；Email： swpitony@163.com 。通信地址：四川省德阳市旌阳区龙泉山北路298号，邮政编码：618000。
更新日期/Last Update: 2022-04-19