邻井干扰可能有利于煤层气的生产，加速排水采气，进而导致更早和更高的采气峰值。煤层气储层存在渗透率各向异性是其固有的特征，布井位置对煤层气田的开发有重要影响。Palmer-Mansoori理论指出，由于解吸过程中压力降低基质收缩，增加了有效渗透率，从而能提高煤层气产量的气体采收率。煤层气储层模拟应考虑并纳入Palmer-Mansoori模型，CMG模拟器可以模拟这些效应。本文对各种储层和生产参数敏感性进行系统研究，为更有效地开发这些煤层气提供指导。
SIMULATION STUDY OF THE EFFECT OF WELL SPACING, EFFECT OF PERMEABILITY ANISOTROPY, AND EFFECT OF PALMER AND MANSOORI MODEL ON COALBED METHANE PRODUCTION
ABSTRACT
Interference for adjacent wells may be beneficial to Coalbed-Methane production. The effect is the acceleration of de-watering which should lead to earlier and higher gas rate peaks. It is inherent that permeability anisotropy exists in the coalbed methane formation. It means that the placement of wells (wells configuration) has an effect on the development of coalbed methane field.
The effect of Palmer-Mansoori Theory is increasing effective permeability at lower pressures due to matrix shrinkage during desorption. This effect should increase the gas recovery of coalbed methane production. Palmer and Mansoori model should be considered and included to coalbed methane reservoir simulation.
These effects and phenomena can be modeled with the CMG simulator. A systematic sensitivity study of various reservoir and operating parameters will result in generalized guidelines for operating these reservoirs more effectively.
