长庆榆林气田分支水平井试井资料解释方法-《油气井测试》

文章信息/Info

Title:: Interpretation method for well testing data of branched horizontal wells in Changqing Yulin gas field

作者:: 任超峰1; 王雪芹1; 赵文军1; 卢海娇1; 姜孝明2; 袁雪花3; 1.中国石油长庆油田分公司长北作业分公司陕西西安 710000
2.中国石油集团测井有限公司长庆分公司陕西西安 710200
3.中国石油大港油田分公司勘探开发研究院天津 300280

Author(s):: REN Chaofeng1; WANG Xueqin1; ZHAO Wenjun1; LU Haijiao1; JIANG Xiaoming2; YUAN Xuehua3; 1.Changbei Operation Company of PetroChina Changqing Oilfield Company, Xi′an, Shaanxi 710000, China
2.Changqing Branch Company of Petrochina Corporation Logging Co. Ltd., Xi′an, Shaanxi 710200, China
3.Research Institude of Exploration and Development, Petrochina Dagang Oilfield Company, Tianjin 300280, China

Keywords:: Yulin gas reservoir; branched horizontal well; low permeability reservoir;

interpretation model; well testing interpretation ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;

摘要:: 分支水平井试井解释前期受解释模型及方法的限制，压力测试资料在动态分析中的利用率较低。针对长庆榆林气藏储层特点及井型特点，

采用标准化拟压力函数方法、点源函数方法，以及杜哈美原理在Laplace空间构建了考虑表皮和井筒储集效应的双分支水平井拟压力试井解释模型。利用Stehfest数值

反演技术，获得了实空间井底压力解,并给出了模型典型特征图。应用本模型对研究区块的20口双分支水平井及1口单分支水平井压力测试资料进行了拟合分析,并以三

口典型实例井进行验证，解释结果与现场动、静态资料吻合度高。该解释方法对榆林气田后续的开发和认识具有一定的指导意义。

Abstract:: The utilization rate of pressure testing data in dynamic analysis is low for the limitation of interpretation

model and method. The pseudo pressure bilateral well testing interpretation model is constructed in Laplace space by using the standardized pseudo

pressure function method, point source function method and Duhame principle in consideration of surface effect and wellbore storage effect. It

considers the reservoir characteristics and well pattern characteristics of Changqing gas reservoir in Yulin. The bottom hole pressure solution in

real space and the typical chart of the model are obtained by Stehfest numerical inversion technique. The pressure testing data of 20 double

branch horizontal wells and one single branch horizontal well in the study block are fitted and analyzed by using this model. This model is

verified by three typical wells. The interpretation results are highly consistent with the field dynamic and static data. This interpretation

method has certain guiding significance for the followup development and understanding of Yulin gas field.