水平井产能影响因素综合分析

Analysis of influence factors on productivity of horizontal well

目前就如何准确预测水平井产能这一问题,国内外还存在着很大的分歧。综述了目前国内外预测水平井产能的5种计算方法,并给出了当储层存在着渗透率各向异性和地层损害时修正的产能计算公式。对水平井产能公式进行了分析,并对其相关计算中排驱面积、水平井段长度、油层厚度、渗透率各向异性、地层损害及一些采油工艺等因素对水平井产能造成的影响进行了综合评价,最后提出了相关建议。

Nowadays,there is still a big difference in the question that how to exactly calculate the productivity of horizontal well at home and abroad. In this paper, five methods for calculating the productivity of horizontal well are reviewed and the modified equations are given for the horizontal wells with anisotropy of reservoir permeability and formation damage. The influence factors on the productivity of horizontal wells, such as oil drainage area, horizontal well interval length, reservoir thickness, the anisotropy ratio of reservoir permeability, formation damage and some oil production techniques are synthetically evaluated and analyzed by means of some calculation examples and analysis of the methods for calculating the productivity of horizontal well. Some suggestions are given according to the result of analysis.