请教petrel如何计算净毛比？

liangshuang21

我好像还不是太明白

fanmhd2000

以下是我翻译（关键部分）的帮助文档，希望对你有帮助：
如何生成离散的和连续的NtG曲线？
1、交互式的使用连井剖面（Well Section）：①复制General discrete模板并重新命名为NtG_discrete，在Colors 选项卡并指定两个代码，0表示non-reservoir，1表示reservoir。②打开一个新的井剖面窗口，显示井并选择Paint discrete log class 图标以激活Create new discrete 图标；③点击Create new discrete 图标并选择NtG_discrete 模板。在Global well logs文件夹下选择NtG_discrete曲线以在井剖面上显示它；④Then interpret the areas of each of the wells as either reservoir or non-reservoir by positioning on the empty track for the NtG_discrete log and select the class (code) to paint；⑤Now to create a countinuous log from a discrete log: in the Global well logs for NtG_discrete log go to the Settings\Operations tab\Resample log points, select the option As continuous log and push the button Resample. This operation ensures that the sampling points in the discrete log will also make sense in the continuos log；⑥Then using the Calculator  from Global well logs to generate a new continuous log reservoir by choosing a  Net/Gross template and type NtG_Continuous=If(NtG_discrete=1,1,0). The new log should look identical to the old log with values of 1 or 0 along its whole length；⑦Upscale the new NtG_Continuous log using arithmetic as the averaging method. Upscaled cells will have a value between 1 and 0 depending on the amount of reservoir within the log in the grid cell；⑧Display the property in the Well section window together with the original log (NtG_Continuous) and use the color fill。

2使用计算器与连续曲线作为变量：NtG曲线能够用泥岩体积（Vsh）计算得到。①从Global well logs通过在Calculator中选择一个N/G Net/Gross 模板，并键入NtG=1-Vsh生成一条新的连续NtG储层曲线；②从模板盘中复制General discrete模板并重命名为NtG_cutoff，在Colors 选项卡并指定两个代码，0表示non-reservoir，1表示reservoir。③Open the Calculator  from Global well logs to make a NtG_Cutoff (discrete log) assigning the new template and type NtG_Cutoff=If(NtG<0.8,0,1). Note: the cutoff value should be defined according to your reservoir；④Display the logs (Vsh, NtG and NtG_Cutoff) in a Well Section to compare and quality check。

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fishing 发表于 2011-9-2 20:28
Cell is minimun unit in model, so the cell gets only one value, e.g. a cell is sandstone i ...

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