Enterprise Products on Monday raised to "approximately two weeks" the time it would take for oil to reach Houston from Cushing, Oklahoma, on the reversed Seaway pipeline.

Earlier, an industry monitor said Seaway had delivered little or no oil to Houston by Sunday, which was already day 15.

At startup on May 19, an Enterprise spokesman said it would take about 12 days -- or until last Thursday -- for the first oil from the U.S. futures contract delivery hub to make the trip and that he planned no incremental progress reports.

Industry monitor Genscape, which uses helicopter overflights and electronics to monitor oil pipeline and storage tank activity in Canada and the United States, said little or no oil had reached Houston as of Sunday, 15 days after startup.

Enterprise spokesman Rick Rainey said the 12-day estimate was always based on the line at 150,000 barrels per day, the initial planned capacity, and that it would take several days for the line to reach that flow rate.

The project is on schedule, Rainey said, declining to provide further details because "we don't typically provide daily reports or data related to the operating status of particular assets."