煤层气井井间干扰研究及应用

doi:10.3969/j.issn.1673-8926.2015.02.020

Lithologic Reservoirs ›› 2015, Vol. 27 ›› Issue (2): 126-132.doi: 10.3969/j.issn.1673-8926.2015.02.020

Research on well interference of coalbed methane wells and its application

YAN Xia¹， LI Xiaojun²， ZHAO Hui³， ZHANG Wei²， WANG Zebin²， MAO Delei¹

1. National Engineering Research Center of China United Coalbed Methane ， Beijing 100095 ， China ； 2. PetroChina Coalbed Methane Company Limited ， Beijing 100028 ， China ； 3. College of Petroleum Engineering ， Yangtze University ， Wuhan 430100 ， China

Online:2015-03-03 Published:2015-03-03

Abstract

Abstract:

Well interference of coalbed methane wells is a kind of effective technologies to achieve high and stable gas production rate. At present, there are many studies on the interference phenomenon of coalbed methane wells, but less quantification work of wells interference in the field. According to the drainage features of coalbed methane wells, this paper proposed a new convenient, reliable and efficient method to determine and quantify the wells interference phenomenon, which is on the basis of the difference between observed start-pumping water level and original water level of coal bed methane wells. During the drainage process, the interference phenomenon of coal bed methane wells can be quantified more precisely by the new method. By comparing the results of the proposed method and theory method in the real case in Baode block, the reliability of the proposed method was verified. By the new method, the quantified characteristics and rules of interfered coal bed methane wells in Baode Block were summarized. Hence some reasonable application suggestions of interference of coalbed methane wells were provided, such as proper arrangement of well placement, increase of gas production rate, shortage of gas breakthrough period and optimization of production system.

Key words: shale gas, gas-bearing property, Niutitang Formation, northwestern Hunan

YAN Xia， LI Xiaojun， ZHAO Hui， ZHANG Wei， WANG Zebin， MAO Delei. Research on well interference of coalbed methane wells and its application[J].Lithologic Reservoirs, 2015, 27(2): 126-132.

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