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- Federal Energy Regulatory Commission
- Technical Conference
- September 28, 2004
- Elizabeth Campbell
- Energy Information Administration (EIA)
- Elizabeth.Campbell@eia.doe.gov
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- Survey respondents and sample
- Survey content
- Collection methods
- Estimation
- Release of estimates
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3
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4
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5
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6
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7
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- Working gas volumes as of 9:00 a.m. on Friday; due by COB Monday
- Respondents report company volumes at a regional level; estimates
allowed
- EIA edits data; quality comparisons provided to monthly surveys
- EIA provides secure work areas for processing
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8
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- Revised data should be submitted whenever the measure of working gas for
the prior week in any region has been revised by 500 million cubic feet
or more.
- Respondents are requested to submit a revised form when that happens
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9
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- Revisions shall be disseminated in the WNGSR according to the
established schedule and shall occur when the effect of reported changes
is at least seven billion cubic feet at either a regional or national
level.
- If a revision is made, changes to all regions shall be recorded.
- Changes shall only lead to a published revision when it exceeds the
seven billion cubic feet threshold.
- Revisions shall not be disseminated on an unscheduled basis.
- EIA will include revisions in the estimates as part of the next release
of the Weekly Natural Gas Storage Report on its web site.
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- where:
- Y = Estimate of working gas for a region
- A = Estimation factor in the given region
- wwg = Weekly working gas in storage for sample operators in region for
the collection week
- n = Number of operators in the estimation companies group
- m = Number of operators in the base group; hence the total number of
operators in the sample group equals n + m
- K = Volumes of working gas that exhibited little or no variation at a
company level, for companies in the nonsampled group
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11
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12
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13
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Notes