煤层气储集层评价参数及其组合

COALBED GAS RESERVOIR EVALUATION PARAMETERS AND THEIR COMBINATIONS

从认识煤层气储层的基本特征入手，结合煤岩学、油气层物理学和渗流力学等理论，通过地质调查、实验室测试、试井、测井和排采试验等手段，提出了进行煤层气储集层评价所需的参数及其组合。主要包括以下几类参数：①煤层气储集层赋存状态及煤岩参数；②煤层气储集特征参数；③煤层气储集层物性参数；④流体特征参数；⑤生产排采参数。将上述几类参数进行组合，列出了７大类共４９项参数。

According to the basic characteristics of coalbed gas reservoir,in the light of the theories as coal petrology,reservoir engineering and porous flow mechanics,etc,the parameters need for carrying out coalbed gas reservoir evaluation and their combinations are proposed through the means as geological survey,laboratorial test,well testing,logging and drainage and recovery experiments,etc.They include these parameters related to:①the existence conditions and coal petrology of coalbed gas reservoir;②the storing characteristics of coalbed gas;③the petrophysical properties of coalbed gas reservoir;④the fluid characteristics;⑤the drainage and recovery in producing process.Through the combination of several types of parameters mentioned above,7 types(altogether 49 terms)of parameters are listed,then the standards of evaluating the coallbed gas reservoir parameters are proposed.These standards were applied to the coalbed gas experimental areas as Liulin (Shanxi),Panji(South Anhui)and Anyang(Henan).The evaluation results in these areas are coincident with the actual conditions.