水平井产能的影响因素

本文综述了水平井产能的４种计算方法，并给出了当储层存在差渗透率各向异性，井偏心或地层损害时修正的产能计算公式。通过计算实例和现场数据定定量地评价了储层厚度，水平段长度，储层渗透率各向异性指数，偏心距和地层损害等对水平井产能的影响。分析结果表明，以上影响因素之间是相互关的。总体来看，地层损害是影响水平井产能的主要因素。

THE FACTORS AFFECTING THE PRODUCTIVITY OF HORIZONTAL WELL

In this paper, four methods for calculating the productivity of horizontal wells were reviewed, and the modified equations were given for the horizontal wells with anistropy of reservoir permeability, well eccentricity and formation damage. The factors affecting the productivity, such as reservoir thickness, horizontal well length, the anisotropy ratio of reservoir permeability, well eccentricity and formation damage on the productivity of horizontal wells were quantitatively an3lyzed by means of some calculation example and field data. It is shown from the analyzed results that formation damage is generally the major factor affecting productivity of horizontal wells. However, other influence factors should not be ignored in many cases.