如何使用python lasio读取文件的负数

我有file.las，我用python lasio阅读它。但当我打印文件时，lasio读取了一些负数作为Nan

我拥有的.las的内容是

> 1190.09200       0.00000       0.00000       0.00000       0.00000       0.00000       0.00000       0.00000       0.00000       0.00000 
   1190.24440    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1190.39680    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1190.54920    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1190.70160    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1190.85400    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1191.00640    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1191.15880    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1191.31120    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1191.46360    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1191.61600    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000 
   1191.76840    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    -999.25000    

这就是我目前所做的：

import lasio
import json
import numpy
import re

data = lasio.read("./tests/well/O-CMS-001_KGAS-KINT-KOIL-KWTR-PIGN-VCL-   SUWI.las")

print data

当我构建程序时，输出如下：

> 'DEPT': [ 1190.092   1190.2444  1190.3968 ...,  2429.4088  2429.5612  2429.7136],
 'KGAS': [  0.  nan  nan ...,  nan  nan  nan],
 'KINT': [  0.  nan  nan ...,  nan  nan  nan],
 'KOIL': [  0.  nan  nan ...,  nan  nan  nan],

-999.25000读作nan。为什么会发生这种情况？如何读取las文件中的负字符串？我写了这个程序，它可以很好地工作，但不适用于负整数。。！！请帮帮我，我是Python新手…

如果升级到lasio，您应该能够使用

null\u subs=False

关键字参数防止将-999.25替换为

numpy.nan

：

import lasio

data = lasio.read("./tests/well/O-CMS-001_KGAS-KINT-KOIL-KWTR-PIGN-VCL-   SUWI.las", null_subs=False)

---

您可以发布您迄今为止尝试过的内容吗？这是我到目前为止尝试过的代码。似乎LAS文件头部分中的

NULL

项设置为-999.25，并且数据中的那些负值确实应该作为NULL或无效值读入。如果您将该行从-999.25更改为其他值，则应该删除lasio读入的数据中的

nan

值。