Analysis of low permeability gas reservoir fracturing well productivity equation considering multi-factors

Yin Peng; Wei Jun; Zhang Zhijun; Wu Dongming; Wu Shenqu; Xu Hao; Xu Liang; Hua Keliang

doi:10.13809/j.cnki.cn32-1825/te.2018.01.007

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Analysis of low permeability gas reservoir fracturing well productivity equation considering multi-factors

更新时间：2025-12-05

- Analysis of low permeability gas reservoir fracturing well productivity equation considering multi-factors
- Petroleum Reservoir Evaluation and Development Issue 1, Pages: 34-37+43(2018)
- 作者机构：
  
  1. 中海油能源发展股份有限公司工程技术分公司
  2. 中海石油(中国)有限公司天津分公司
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2018.01.007
  CLC： TE37;TE32+8
- Published：2018
- 稿件说明：
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[1]尹鹏,魏俊,张志军,吴东明,吴慎渠,徐浩,徐良,华科良.考虑多因素的低渗透气藏压裂井产能公式分析[J].油气藏评价与开发,2018,8(01):34-37+43.

Yin Peng, Wei Jun, Zhang Zhijun, et al. Analysis of low permeability gas reservoir fracturing well productivity equation considering multi-factors[J]. Petroleum Reservoir Evaluation and Development, 2018, (1): 34-37+43.
[1]尹鹏,魏俊,张志军,吴东明,吴慎渠,徐浩,徐良,华科良.考虑多因素的低渗透气藏压裂井产能公式分析[J].油气藏评价与开发,2018,8(01):34-37+43. DOI： 10.13809/j.cnki.cn32-1825/te.2018.01.007.

Yin Peng, Wei Jun, Zhang Zhijun, et al. Analysis of low permeability gas reservoir fracturing well productivity equation considering multi-factors[J]. Petroleum Reservoir Evaluation and Development, 2018, (1): 34-37+43. DOI： 10.13809/j.cnki.cn32-1825/te.2018.01.007.

摘要

为了更加准确地预测低渗透气藏压裂井产能

应综合考虑产能影响参数的影响。研究表明:低渗透气藏启动压力梯度与储层平均渗透率呈幂函数关系

介质变形作用使得低渗透储层应力敏感效应较为严重;滑脱效应使得气体渗流阻力减少

气井产能增大。因此基于保角变换原理

建立了考虑应力敏感、滑脱效应、变启动压力梯度因素的压裂井产能预测模型

并研究了各因素对气井产能的影响。结果表明:随着应力敏感系数的增大

气井产量下降

且对低井底流压影响更大;井底流压越低

气井产量随滑脱系数的增大而变化的越明显;启动压力梯度系数在一定范围内对气井产能的影响较大。因此

对于低渗透气藏压裂井产能的预测

需要考虑多因素对气井产能的影响。

Abstract

In order to accurately predict the well capacity in the fracture of the low permeability gas reservoir

it is necessary to consider the multi-factors. The studies show that the relation between the threshold pressure gradient and the average reservoir permeability of the low permeability gas reservoir is the power function. The deformation of the media function makes the stress sensitiveeffect more serious

and the slippage effect makes the gas seepage resistance down and increases the well productivity. Accordingto the conformal transformation theory

we established a prediction model of fracturing well productivity

which considered thestress sensitivity

the slippage effect and the changed threshold pressure gradient

and studied the effects on the productivity. Theresults showed that

with the increase of the stress sensitivity coefficient

the gas well output decreases

and the pressure of the lowwell bottom flow is more affected. The lower the flow pressure of the bottom hole is

the more obvious the gas well output changeswith the increase of slip coefficient. The threshold pressure gradient factors greatly affect the well productivity in a certain range.Therefore

it is necessary to consider the influence of many factors on the gas well productivity in the prediction of the productioncapacity of the low permeability gas reservoir.

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