Study and Application of Horizontal Well Productivity Formula with Continuous Time-Varying Considered

• 作者: Bo Zhang Chao Liu Haojun Wu Junting Zhang Long Wang
• 来源期刊: 电力能源(英文)
• 学科: 数学
• 关键词: Horizontal Well Principle of EQUIVALENT Flow Resistance CONFORMAL Transformation Control RADIUS Pseudo-Steady State Time
• 年，卷（期）: dlnyyw_2018,（9）
• 页码范围: 32-39
• 页数: 8页
• 分类号: O1

摘要

The horizontal well technology has been widely applied to enhanced oil recovery for low permeability and heavy oil reservoir. It is the important basis for designing and optimizing horizontal well to determine the productivity. The productivity determination of horizontal wells in offshore oil fields is mainly based on the actual productivity data of producing directional wells in the similar reservoirs nearby. Considering pressure drop and oil layer thickness to calculate the productivity, this method lacks certain theoretical basis and requires rich working experience for reservoir engineers. The other method is Joshi Formula which needs the known horizontal well control radius to be known. But the control radius is man-made at certain degree. In order to address the shortcomings of existing methods, a new reservoir engineering method was proposed to determine the horizontal well productivity formula, horizontal flow pattern and control radius based on the principle of equivalent flow resistance and conformal transformation. This method has overcome the disadvantage of determining on person. It provided some theoretical basis for getting the horizontal well productivity and is of some guiding meaning for evaluating the productivity of adjustment wells and development wells.