Invention Grant
- Patent Title: Methods and systems for determining optimum pressure drawdown in a production well for a shale gas reservoir
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Application No.: US16879953Application Date: 2020-05-21
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Publication No.: US11591905B2Publication Date: 2023-02-28
- Inventor: Hui-Hai Liu , Yanhui Han , Zhuang Sun
- Applicant: Saudi Arabian Oil Company
- Applicant Address: SA Dhahran
- Assignee: Saudi Arabian Oil Company
- Current Assignee: Saudi Arabian Oil Company
- Current Assignee Address: SA Dhahran
- Agency: Bracewell LLP
- Agent Constance G. Rhebergen; Keith R. Derrington
- Main IPC: E21B43/12
- IPC: E21B43/12 ; E21B43/16 ; E21B49/00 ; G01N7/10 ; G01N15/08 ; E21B49/02

Abstract:
Methods and systems for increasing normalized production rate of an oil and gas reservoir by optimizing a pressure drawdown of a subsurface formation are disclosed. The methods include determining permeability of the subsurface formation as a function of effective stresses, determining a stress sensitivity factor for the core sample, upscaling the sensitive stress factor, determining the optimum pressure drawdown for the subsurface formation, and controlling the pressure drawdown in a field operation such that it does not exceed the optimum pressure drawdown for the subsurface formation.
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