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1·It is a key factor in the response of a neutron porosity log.

含氢指数是中子孔隙度测井响应的主要参数。

2·Recognizing natural gas with convention log data mainly is based on 3 porosity log curves.

常规测井资料识别天然气主要依据的是三孔隙度测井曲线。

3·Identifying natural gas with conventional log data mainly is based on three porosity log curves.

常规测井资料识别天然气主要依据三孔隙度测井曲线。

4·The neutron porosity log reads low, whereas the density log reads high and relatively accurately.

中子孔隙度的读数低；而密度孔隙度的读数高，且相对而言较为准确。

5·Different porosity reading on the neutron porosity log for the same formation due to gas in the pore space.

由于孔隙空间存在着气体，同一地层的中子孔隙度测井和密度孔隙度读数不同。

6·When superposing neutron porosity log with density porosity log, density porosity is far higher than neutron porosity.

当中子孔隙度与密度孔隙度曲线重叠时，会有密度孔隙度远高于中子孔隙度的特征；

7·But it will fail to recognize the gas bearing bed buried deeper by the two methods as its porosity log feature is not obvious, especially when density porosity is lower than neutron porosity.

但是，对埋藏较深的气层而言，由于其孔隙度曲线特征并不明显，故用常规方法识别十分困难，特别是当密度孔隙低于中子孔隙度时，上述两方法识别气层均失败。

8·Neutron log is an important means for providing porosity and lithology information.

中子测井是提供地层孔隙度和岩性信息的重要手段。

9·Calculation methods and formulae of porosity, permeability, shale content and oil saturation are given in the part of log interpretation.

测井解释中对孔隙度、渗透率、泥质含量和含油饱和度给出了计算方法和公式。

10·In Kuche area, the sandstone reservoir is characterized by low porosity, low permeability and high pressure, and pore texture is complex, so, it is very difficult for reservoir log evaluation.

库车地区砂岩储层以高压低孔隙度低渗透率为显著特征，且储层结构复杂，给储层测井评价带来很大困难。