Sand prediction of fractured gas wells by consideration of induced stress

Luo Zhifeng; Zhang Nanlin; Zhao Liqiang

doi:10.13809/j.cnki.cn32-1825/te.2018.01.008

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Sand prediction of fractured gas wells by consideration of induced stress

更新时间：2025-12-05

- Sand prediction of fractured gas wells by consideration of induced stress
- Petroleum Reservoir Evaluation and Development Issue 1, Pages: 38-43(2018)
- 作者机构：
  
  西南石油大学油气藏地质及开发工程国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13809/j.cnki.cn32-1825/te.2018.01.008
  CLC： TE358.1
- Published：2018
- 稿件说明：
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[1]罗志锋,张楠林,赵立强.考虑诱导应力的压裂气井出砂预测[J].油气藏评价与开发,2018,8(01):38-43.

Luo Zhifeng, Zhang Nanlin, Zhao Liqiang. Sand prediction of fractured gas wells by consideration of induced stress[J]. Petroleum Reservoir Evaluation and Development, 2018, (1): 38-43.
[1]罗志锋,张楠林,赵立强.考虑诱导应力的压裂气井出砂预测[J].油气藏评价与开发,2018,8(01):38-43. DOI： 10.13809/j.cnki.cn32-1825/te.2018.01.008.

Luo Zhifeng, Zhang Nanlin, Zhao Liqiang. Sand prediction of fractured gas wells by consideration of induced stress[J]. Petroleum Reservoir Evaluation and Development, 2018, (1): 38-43. DOI： 10.13809/j.cnki.cn32-1825/te.2018.01.008.

摘要

在近井地带应力分布的基础上

考虑人工裂缝诱导应力

计算得到压裂井井筒周围应力场。根据Drucker-Prage准则

计算不同生产条件下的地层稳定性系数。计算结果表明:引起地层出砂的主要因素是高生产压差引起的诱导应力

而不是气体流动造成的拖拽力;裂缝数量越多

诱导应力越大

地层越不稳定

越容易出砂;稳定性系数随渗透率增加而降低

随渗透率增加而增加的速度先快后慢

稳定性系数受孔隙度的影响不大;随着裂缝长度的增加

稳定性系数增加

出砂风险降低。考虑了生产过程中诱导应力对稳定性系数的影响

更加全面地研究出砂影响因素

为防砂设计提供理论参考。

Abstract

Based on the stress distribution in the zone near the well

and by the consideration of the artificial fracture induced stress

we found out the stress field around the wellbore of the fractured wells. According to the Drucker-Prage criteria

we obtained the formation stability coefficients under the different conditions. The calculation results showed that the main factors of the formation sanding are induced stress caused by the high production pressure difference instead of the gas drag. More fractures

larger induced stress and more unstable formation made the sanding easier. Meanwhile

the formation stability coefficient decreased with the increase of the permeability

and the speed of the growth overall dropped down. However

the porosity had little impact on the formation stability coefficient. As the length of the fracture increased

the stability coefficient increased as well

on the contrary

the risk of the sanding decreased. By considering the impacts of the induced stress on the stability coefficient in the process of the production

we studied the influencing factors of the sanding comprehensively

to provide the theoretical references for the sanding control design.

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