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储层损害对大斜度定向井产能影响的计算方法研究
石油钻采工艺
2001年 23卷 第6期
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Title
STUDY OF FORMATION DAMAGE EFFECT ON THE PRODUCTIVITY FOR DIRECTIONAL WELLS
Authors
Zhang Zhenhua
Yan Jienian
单位
辽河石油勘探局工程技术研究院, 辽宁盘锦 124010
石油大学, 北京昌平 102249
Organization
Engineering &
Technologies Research Institute of Liaohe Oilfield
摘要
根据对倾斜井眼周围储层的渗流规律的分析,研究了储层损害对完全穿透油层的倾斜井眼产能的影响规律。采用空间坐标变换的方法,将渗透率各向异性介质转换为各向同性介质,求出了单相流条件下由于井斜产生的拟表皮系数Sθ的关系式;通过对倾斜井眼周围储层损害分布区域的分析,求出了由于储层损害而产生的真表皮系数Sd的关系式。试算结果表明:提出的计算方法简便,准确率较高,可供现场使用。
Abstract
The productivity equation containing skin factors for directional wells in the infinite reservoir was provided under the condition of the single and stable-state flow. A coordinate transformed method was adopted to calculate the true skin factor Sd and the pseudo-skin factor Sθ in the directional wells. It has been confirmed that the accuracy of calculated results using the productivity equation is in good agreement with the actual data. It can be applied to the fields for using.
关键词：
定向井;
产能评价;
表皮系数;
地层损害;
计算方法;
Keywords:
directional well;
productivity evaluation;
skin factor;
formation damage;
calculation method;
DOI
10.3969/j.issn.1000-7393.2001.06.012
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