ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) |
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Dec. 31, 2017 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounting Policies [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule Of Depletion and Depletion Rate Per Barrel Of Oil Equivalents [Table Text Block] |
The following table shows total depletion and depletion per barrel-of-oil-equivalent rate, for the years ended December 31, 2017, 2016 and 2015.
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| Schedule Of Property Plant And Equipment Estimated Useful Lives [Table Text Block] |
Depreciation of buildings and equipment is calculated using the straight-line method based upon the following estimated useful lives:
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- Definition Tabular disclosure relates to depletion of oil properties and depletion rate per barrel of oil equivalents. No definition available.
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- Definition Tabular disclosure relates to estimated useful lives of property, plant and equipment. No definition available.
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- References No definition available.
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