Forecast and validation of coal reservoir fractures based  on structural fracture mapping technology

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  • 1.Institute of Resources and Environment,Henan Polytechnic University,Jiaozuo 454000,China;
    2.Collaborative Innovation Center of Coalbed Methane and Shale Gas
    in Central China Economic District,Jiaozuo 454000,China;
    3.Faculty of Earth Resources,China University of Geosciences(Wuhan),Wuhan 430074,China

Received date: 2017-04-01

  Revised date: 2017-07-17

  Online published: 2017-09-10

Abstract

 

Using structural fractures mapping technology,388 observation points were measured in the surrounding areas in Fukang Baiyanghe Mining area,Xinjiang.According to the observation point structural fractures development determine the level of broken and forecast the structural fractures of the underground coal reservoir advantage direction and development characteristics.It was verified by using 6 production data of coalbed methane wells,fracturing curve and hole enlargement rate.The results show that: the surface observation point in the surrounding rock broken rank high block,the coal reservoir structural fissure system development,natural fissure communication in good condition,high permeability,higher coalbed methane well production;fracturing curve shape is low after high first type and wave type,the hole enlargement ratio is generally greater than 15%.The surface observation points in the surrounding rock broke rank low block,the coal reservoir structural fissure system has no development,and natural fissure communication is in bad condition with low permeability,and low coalbed methane well production;fracturing curve shape is rising type,and the hole enlargement ratio is generally less than 7%.The result of predicting coal reservoir structure fracture characteristics by using this method and engineering data alignment is higher.For coalbed methane development zone with similar geological conditions of coal reservoir,prediction fissure system provides a new way of thinking and new technology.
 

Cite this article

Zhang Zhou,Wang Sheng-wei,Zhou Min . Forecast and validation of coal reservoir fractures based  on structural fracture mapping technology[J]. Natural Gas Geoscience, 2017 , 28(9) : 1356 -1362 . DOI: 10.11764/j.issn.1672-1926.2017.07.008

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