硫沉积气藏产量递减模型研究  

STUDY ON PRODUCTION DECLINE MODEL IN SULFUR DEPOSITION RESERVOIR

作　　者：刘永良[1] 徐艳霞[1] 徐艳梅[2] 黄伟岗[2] 刘彬[1] 

机构地区：[1]中国石油西南油气田分公司川东北气矿,四川达州635000 [2]中国石油勘探开发研究院廊坊分院,河北廊坊065007

出　　处：《西南石油大学学报（自然科学版）》2011年第2期104-108,14,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：教育部博士学科点新教师类基金(20095122120012)

摘　　要：以往对高含硫气藏开发技术研究所需录取的资料在实际操作过程中难以得到。因此,针对井筒附近发生硫沉积的高含硫气藏,建立了硫沉积复合气藏产量递减数学模型,运用Stefest数值反演绘制了Blasingame产量递减曲线,并分析了硫沉积对气井产量递减规律的影响。结果表明:产量递减中期,硫沉积区含硫饱和度越高,无因次递减产量积分"导数"曲线下凹越深,当含硫饱和度增大到0.5时,积分"导数"曲线下凹至最深,积分"导数"达最小值;硫沉积半径越小,无因次递减产量平缓段出现的时间越早;产量递减后期,无因次递减产量积分与积分"导数"曲线晚期为一条斜率为-1的直线,表现为调和递减。该方法比压力恢复试井法更具优越性,可为高含硫气藏的开发提供指导。In the previous studies,the data of the high sulfur gas reservoir development research are difficult to obtain in the actual operation.Considering sulfur deposition near wellbore,the mathematical model of production decline in sulfur deposition composite gas reservoir is established.The production decline Blasingame type curves of single gas well in high sulfur gas reservoir are drawn with Stefest numeric inversion.Then,the characteristics of curves and influence factors are discussed.The non-dimensional production decline integral derivative curves concave down deeper at middle period of production decline curves with the growth of sulfur saturation.When the sulfur saturation increases to 50%,the integral derivative curves sink to the deepest level and the integral derivative value is minimum.The smaller the radius of sulfur deposition is,the earlier the flattish stage of the non-dimensional production decline curves will appear.A straight line with slope of-1 is emerged in both the integral and integral derivative curves at late period of the production decline curves,which is the indication of harmonic decline.The study findings are superior to the pressure build up test,therefore,this study is of great value in the exploration and development of gas reservoir with high sulfur.

关 键 词：高含硫 硫沉积 产量递减 Blasingame曲线 生产动态 

分 类 号：TE37[石油与天然气工程—油气田开发工程]