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Petroleum January 1981, the refinery input of unfinished oils typically exceeded the available supply of unfinished oils. Note 1. Petroleum Survey Respondents. The Energy That discrepancy was assumed to be due to the redesigna- Information Administration (EIA) uses a number of sources tion of distillate and residual fuel oils received as such but and methods to maintain the survey respondent lists. On a used as unfinished oil inputs by the receiving refinery. The regular basis, survey managers review such industry publi- imbalance between supply and disposition of unfinished oils cations as the Oil & Gas Journal and Oil Daily for informa- would then be subtracted from the production of distillate tion on facilities or companies starting up or closing down and residual fuel oils. Two-thirds of that difference was operations. Those sources are augmented by articles in subtracted from distillate and one-third from residual. newspapers, communications from respondents indicating Beginning in January 1981, EIA modified its survey forms changes in status, and information received from survey to account for redesignated product and discontinued the systems. above-mentioned adjustment. Prior to 1983, crude oil burned on leases and used at pipeline To supplement routine frames maintenance and to provide pump stations was reported as either distillate or residual fuel more thorough coverage, a comprehensive frames investiga- oil and was included as product supplied for these products. tion is conducted every 3 years. This investigation results in the reassessment and recompilation of the complete frame for each survey. The effort also includes the evaluation of Note 4. Petroleum New Stock Basis. In January 1975, the impact of potential frame changes on the historical time 1979, 1981, and 1983, numerous respondents were added to series of data from these respondents. The results of this bulk terminal and pipeline surveys, affecting subsequent frame study are usually implemented in January to provide stocks reported and stock change calculations. Using the a full year under the same frame. expanded coverage (new basis), the end-of-year stocks, in million barrels, would have been: In 1991, EIA conducted a frame identifier survey of compa- Crude Oil: 1982—645 (Total) and 351 (Non-SPR). nies that produce, blend, store, or import oxygenates. A Distillate Fuel Oil: 1974—224; 1980—205; and summary of the results from the identification survey was 1982—186. published in the Weekly Petroleum Status Report dated Jet Fuel (Total): 1974—30; 1980—42; and 1982—39. February 12, 1992, and in the February 1992 issue of the Liquefied Petroleum Gases: 1974—113; 1978—136; Petroleum Supply Monthly. In order to continue to provide 1980—128; and 1982—102. relevant information about U.S. and regional gasoline Propane and Propylene: 1978—86; 1980—69; and supply, EIA conducted a second frame identifier survey of 1982—57. those companies during 1992. As a result, numerous Motor Gasoline (Total): 1974—225; 1980—263; respondents were added to the monthly surveys effective in 1982—244. January 1993. See Petroleum Supply Monthly (PSM), Residual Fuel Oil: 1974—75; 1980—91; and 1982—69. Appendix B, “Frame.” Total Petroleum: 1974—1,121; 1980—1,425; and 1982—1,461. Note 2. Motor Gasoline. Beginning in January 1981, EIA Stock change calculations beginning in 1975, 1979, 1981, expanded its universe to include non-refinery blenders and and 1983 were made by using new basis stock levels. separated blending components from finished motor gasoline as a reporting category. Also, survey forms were In January 1984, changes were made in the reporting of modified to describe refinery operations more accurately. natural gas liquids. As a result, unfractionated stream is now reported on a component basis (ethane, propane, Beginning with the reporting of January 1993 data, EIA normal butane, isobutane, and pentanes plus). This change made adjustments to the product supplied series for finished affects stocks reported and stock change calculations. motor gasoline. It was recognized that motor gasoline Under the new basis, 1983 end-of-year stocks, in million statistics published by EIA through 1992 were underre- barrels, would have been 108 for liquefied petroleum gases, ported because the reporting system was (1) not collecting and 55 for propane and propylene. all fuel ethanol blending, and (2) there was a
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