动态法评价涩北一号气田多层合采井的干扰性  

Dynamic Method for Evaluating Well Interference of Commingling Production in Sebei 1 Gasfield

作　　者：刘俊丰 聂鹏程 李延华 周治岳 陈智芳 

机构地区：[1]中国石油青海油田天然气开发公司，青海 格尔木 816000

出　　处：《天然气技术与经济》2015年第4期36-38,共3页Natural Gas Technology and Economy

摘　　要：涩北一号气田为第四系疏松砂岩气藏,埋藏浅,气水层交互,层多而薄,易出水出砂,开发过程中为实现提高单井产量、有效抑制出砂的目的,直井多采用多层合采方式进行生产。气藏多层且连通性好则势必存在相互干扰,但干扰程度难以量化且研究方法不多,以此为立足点,以Ⅰ-4层组为研究对象,利用压力、产量、产出剖面、kh等多种资料,推算各小层目前地层压力,通过地层压力变化来研究各小层之间的纵向干扰情况;在平面上,推导应用单井泄气半径理论计算公式,绘制各小层单井泄气半径图,可以直观反映出各井区平面干扰现象。Sebei 1 gasfield, as the Quaternary unconsolidated sandstone gas reservoir with plenty of thin layers, is characterized by shallow burial depth, gas layers interbedded with water layers.Undesired water and sand easily may be produced in its development. So, a method of commingling production is often applied to some vertical wells in order to increase well production and to control effectively sand production. However, better connectivity among multiple layers is guaranteed to cause interference. And it's very hard to quantify this interference extent and few methods can be used. In this study, the I-4 layer is taken as an example. At first,the current formation pressure is calculated for various small layers by using some data of pressure, production, production profile, and Kh; then, the vertical interference among small layers is analyzed by variation of formation pressure; at last, a diagram of drainage radius is mapped out by a theoretical formula of drainage radius,which may visually reflect the interference in plane for every well area.

关 键 词：层间干扰 多层合采 单井泄气半径 

分 类 号：TE37[石油与天然气工程—油气田开发工程]