摘要
煤层气地质储量是指 ,在原始状态下赋存于已发现的具有明确计算边界的煤层气藏中的煤层气总量。煤层气独特的地质特征决定了其储量计算方法有别于常规天然气。以我国第一个已经审批通过的煤层气探明储量报告为基础 ,对煤层气储量的各种计算方法 (类比法、体积法、数值模拟法、产量递减法 )、参数选取、采收率预测和存在的问题等进行了探讨。发现影响煤层气储量计算精度的关键参数是含气面积、煤层厚度和含气量 。
Coal bed gas reserves in place ar e the total amounts of the coal bed gas occurring to the discovered coal bed g as reservoir with a definite calculation boundary and under an original state.Th e calculation methods of coal bed gas reserves are different from those of conv entional gas reserves because of the unique geological characteristics of the co al bed gas.On the basis of the first coal bed gas proved reserve report examin ed and approved by our country,various calculation methods (analogy method,volum etric method,numerical simulation method and production decline method) of coal bed gas reserves,parameter selection,recovery prediction and existential probl ems,etc.,are discussed in the paper.It is found that the key parameters influenc ing the calculation accuracy of coal bed gas reserves are gas bearing area,coa l bed thickness and gas saturation,and there are many uncertain factors needing to be studied in a deep going way in delimiting the gas bearing area especial ly.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2002年第5期32-35,共4页
Natural Gas Industry
关键词
煤层气
储量
计算方法
精度
采收率
Coal formed gas,Reserve calculatio n,Calculation method,Accuracy,Recovery factor
