The adsorption/desorption characteristics of a coal reservoir play an important role in coalbed methane (CBM) development. proximate analysis, maceral analysis and isothermal experiment are carried out based on samples from no. 4+5 seam Baode block. Combing with experimental data the CBM well-produced water salinity block, effect content its influencing mechanism is discussed. results show that...

This paper presents technical and application aspects of a new software suite, MCP (Methane Control and Prediction), developed for addressing some of the methane and methane control issues in longwall coal mines. The software suite consists of dynamic link library (DLL) extensions to MS-Access written in C++. In order to create the DLLs, various statistical, mathematical approaches, prediction ...

The enrichment of coalbed methane (CBM) and the outburst of gas in a coal mine are closely related to the nanopore structure of coal. The evolutionary characteristics of 12 coal nanopore structures under different natural deformational mechanisms (brittle and ductile deformation) are studied using a scanning electron microscope (SEM) and low-temperature nitrogen adsorption. The results indicate...

Coal reservoirs have characteristically low permeability and pressure are highly sensitive to damage during well completion. Therefore, systematic reservoir protection measures must be taken in the process of coalbed methane exploitation. However, some areas such as Qinshui basin, there is a contradiction between sidewall stability horizontal (CBM) wells coal seams, which becomes main technical...

As an unconventional natural gas, coalbed methane (CBM) has been recognized as a significant fuel and chemical feedstock that should be recovered. Permeability is key factor controls CBM transport in coal. The slippage effect influential phenomenon occurs during gas penetration processes, especially low-permeable media. Apparent permeability may differ greatly from intrinsic due to slippage. Ho...

This paper presents results of a simulation study designed to evaluate the applicability of Arps' [1945] decline curve methodology for assessing reserves in coalbed methane reservoirs. We simulated various coal properties and well/operational conditions to determine their impact on the production decline behavior as quantified by the Arps decline curve exponent, b. We then evaluated the simulat...

Abstract Shanxi Debao has affluent coalbed methane (CBM) reservoir in China. Understanding its characteristics, especially the diffusion characteristics of natural gas coal seam, is key data CBM development this block. In paper, a method measuring coefficient and rock by adsorption proposed using experimental method. The calculation model for calculating established according to amount, correla...