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Posts Tagged ‘Mars Pipeline System’

Gulf production was stable in July. Looks like the zinc effect was minimal.

Posted in Gulf of Mexico, Offshore Energy - General, pipelines, tagged , , , , , , , on October 1, 2025| Leave a Comment »

In mid-July, zinc, presumably from a zinc bromide fluid used in completing a Chevron well, contaminated oil production destined for an Exxon refinery via Shell’s Mars Pipeline System. Total Gulf of America production was stable in July, so it appears that the contamination issue was quickly resolved.

Meanwhile, two new floating production units, Beacon’s Shenandoah and LLOG’s Salamanca are now on line. More on this and bp’s Tiber announcement in an upcoming post.

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Zinc disrupts Gulf production; SPR to the rescue

Posted in Gulf of Mexico, Offshore Energy - General, tagged , , , , , , , on July 16, 2025| Leave a Comment »

Reuters and others report that zinc from a new Chevron well has contaminated oil production destined for an Exxon refinery via Shell’s Mars Pipeline System. Because contaminated crude may cause maintenance issues and reduces the quality of refined products, Exxon will not accept crude from the Mars system until the zinc issue has been resolved.

The Mars system delivers about 575,000 bopd raising concerns about supplies to Gulf Coast refineries. But fear not, DOE authorized the delivery of up to 1 million barrels of oil from the Strategic Petroleum Reserve to the Exxon’s Baton Rouge refinery.

(Ironically, yesterday’s post pointed to the importance of the SPR and questioned the decision to drastically reduce crude oil purchases. This zinc incident is likely to be minor, and Exxon will repay the SPR in kind. However, more serious regional, domestic, and international events could call for much greater SPR withdrawals.)

The above map shows Chevron platforms that connect with the Mars system at Port Fourchon.

Speculation/commentary:

  • The well/platform responsible for the zinc contamination has not been identified. Given that production is ramping up at Chevron’s Anchor facility, a new well on that platform may be the source of the zinc. Other Chevron platforms that connect to the Mars system are indicated in the diagram above.
  • Given that zinc in crude oil is rare, a well completion fluid containing zinc bromide may be the culprit.
  • Note the integration of offshore production streams, and the involvement of 3 industry super-majors. These companies are highly competitive, as evidenced by the Chevron-Exxon Stabroek dispute, but are also cooperative in producing, transporting, and refining oil and gas. However, they and other majors are restricted (rather illogically) from bidding jointly for leases.

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