Something weird about those numbers. Look at casinghead gas from Dec '04 to Jan '05. A sudden massive drop with nothing to explain it that I can think of. Then casinghead numbers are down all through '05.

This looks like bad data.

Chris

Interesting comment, below are the average daily figures.

          GAS WELL GAS      CASINGHEAD GAS
2005          GCF/D               GCF/D

JANUARY       14,08               1,80
FEBRUARY     14,26               1,84
MARCH           14,34               2,00
APRIL             14,42               1,89
MAY                14,18               1,88
JUNE               14,07               1,97
JULY               14,06               1,95
AUGUST         13,88               1,96
SEPTEMBER   13,12               1,77
OCTOBER       13,24               1,92
NOVEMBER      12,91               1,89
DECEMBER      12,27               1,76

(Sorry bout the table, but hopefullu it is readable)
GCF Giga cubic feet; or Bcf which is more commonly used in the US.

Why the significant drop for gas well gas from October 2005 till December 2005?

Bad data?