稠油掺稀井注天然气降粘举升最小注气质量流量确定方法
By calculating the pressure and flow pattern inside the wellbore, the minimum gas injection mass flow rate of heavy oil wells was determined, which solved the problem of low gas lift efficiency during the viscosity reduction and lifting process of heavy oil wells by diluting and thinning, and achieved uniform mixing and energy optimization of heavy oil and thin oil.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA PETROLEUM & CHEMICAL CORP
- Filing Date
- 2022-10-29
- Publication Date
- 2026-07-17
AI Technical Summary
The existing technology cannot determine the minimum gas injection mass flow rate during the viscosity reduction and lifting process of heavy oil wells, resulting in low gas lift efficiency, uneven mixing of heavy oil and light oil, and affecting economic benefits.
By calculating the minimum tubing shoe pressure and the pressure at the depth from the annulus wellhead to the tubing shoe, and combining this with the Beggs-Brill model to analyze the gas-liquid two-phase flow pattern in the wellbore, the minimum gas injection mass flow rate is determined to ensure continuous flow in the wellbore.
A method is provided to determine the minimum gas injection mass flow rate for viscosity reduction and lift in wells with heavy oil mixed with light oil, thereby improving the mixing uniformity of heavy oil and light oil, enhancing gas lift efficiency, reducing light oil consumption, and improving economic benefits.
Smart Images
Figure CN117948107B_ABST