特种油气藏2013，Vol.20Issue(2)：65-68,4.DOI:10.3969/j.issn.1006-6535.2013.02.015
页岩气产量递减典型曲线中关键参数的确定方法
Methods to Determine the Key Parameters of Typical Production Decline Curves of Shale Gas Reservoirs
摘要
Abstract
In order to reduce the uncertainly of the prediction of shale gas production decline, the methods to determine some key parameters in the application of typical curves are analyzed. The study shows that it is suggested that daily production history data should he taken as a basis in predicting typical curves; the maximum value of initial production should he taken as a basic point in finding initial monthly production, 29 points are in proper order selected which are slightly less than the basic point, and then the 30 values are summed and the summation is regarded as initial monthly production; for the wells which were ever shut in, the period when the wells were shut in is neglected, the lime when the well is restarted is move backward to the time when the well was shut in, and thus the typical curves determined by this method doesnt necessarily consider the influence of production time rate. The type of production decline is an important part for shale gas play. However, such Cantors as workover, clean - up can lead to the complex production behavior which will cause some uncertainty for analyzing the type curve. In this paper, some methods are proposed and compared to determine the keys parameters during forecasting type curve of production decline. Analyses show that the method based on the daily data is more accurate than that based on the monthly data. The best method to evaluate the initial month production a-mong three proposed methods is to select the maximum daily production and 29 daily production data that is just less than the maximum data from the initial production data. The initial month production is the summation of the 30 daily production data. For the production data including the shut in, the shut in period should be deleted and connected with the production data to keep the time be continuous. Based on the revised data, the type curve can be forecasted without considering the production rate.关键词
页岩气/典型曲线/初始产量/累计产量/时率Key words
shale gas/ typical curve/ initial production rate/ accumulative production/ time rate分类
能源科技引用本文复制引用
白玉湖,杨皓,陈桂华,冯汝勇,丁芊芊..页岩气产量递减典型曲线中关键参数的确定方法[J].特种油气藏,2013,20(2):65-68,4.基金项目
中海油总公司综合科研项目"国内外页岩油气资源评价与开发关键技术前期调研研究"(CNOOC-KJ-125-ZDXM-21-ZY-01-ZY-2011) （CNOOC-KJ-125-ZDXM-21-ZY-01-ZY-2011）
