新疆石油地质

新疆石油地质 ›› 2016, Vol. 37 ›› Issue (zk(English) ): 78-80.

• RESERVOIR ENGINEERING • 上一篇    下一篇

A Comprehensive Production Formula for Horizontal Wells

LI Chuanliang1, ZHU Suyang1, DONG Fengling2   

  1. 1. College of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610599, China;
    2. No.2 Oil Production Plant, Zhongyuan Oilfield Company, Sinopec, Puyang, Henan 457532, China
  • 出版日期:2017-01-01 发布日期:2021-05-24

A Comprehensive Production Formula for Horizontal Wells

LI Chuanliang1, ZHU Suyang1, DONG Fengling2   

  1. 1. College of Petroleum Engineering, Southwest Petroleum University, Chengdu, Sichuan 610599, China;
    2. No.2 Oil Production Plant, Zhongyuan Oilfield Company, Sinopec, Puyang, Henan 457532, China
  • Online:2017-01-01 Published:2021-05-24

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摘要： Conventional production formulas for horizontal wells only consider the outer planar radial flow and the inner vertical radial flow, and ignore the intermediate planar linear flow. So the flow resistance is underestimated and oil production is overestimated with these formulas. This paper presents a comprehensive production formula for horizontal wells, which covers all the three flows. In comparison with the conventional production formulas, this new formula can get a higher flow resistance and a lower production rate for horizontal wells. Calculations show that the longer the horizontal section is, the higher the ratio of the intermediate planar linear flow to the total flow of wells will be, and the larger the drop of the production rate from the conventional production rate formulas will be. As the horizontal section length is close to the length of oil drainage zone, the new formula tends to be the production rate formula for wells with relatively long horizontal section. Therefore, horizontal wells with long and short horizontal section lengths can be unified by this new formula.

关键词: reservoir, horizontal well, production formula, radial flow, linear flow

Abstract: Conventional production formulas for horizontal wells only consider the outer planar radial flow and the inner vertical radial flow, and ignore the intermediate planar linear flow. So the flow resistance is underestimated and oil production is overestimated with these formulas. This paper presents a comprehensive production formula for horizontal wells, which covers all the three flows. In comparison with the conventional production formulas, this new formula can get a higher flow resistance and a lower production rate for horizontal wells. Calculations show that the longer the horizontal section is, the higher the ratio of the intermediate planar linear flow to the total flow of wells will be, and the larger the drop of the production rate from the conventional production rate formulas will be. As the horizontal section length is close to the length of oil drainage zone, the new formula tends to be the production rate formula for wells with relatively long horizontal section. Therefore, horizontal wells with long and short horizontal section lengths can be unified by this new formula.

Key words: reservoir, horizontal well, production formula, radial flow, linear flow