Upstream liability, upstream property gen.

[sega_tarasov]

Прошу помочь с переводом сочетаний:
Upstream property
Upstream liability
Downstream property
Downstream liability
Контекст:
The Company was engaged by the captive of one of the world’s largest oil and gas companies to assess the potential effect on the estimated claims cost of decreasing policy deductibles. To deliver this project models were developed separately for four categories of loss:
• Upstream Property
• Upstream Liability
• Downstream Property
• Downstream Liability

Заранее спасибо

[Ухтыш]

upstream - то, что относится к началу работ - разведка, добыча
downstream - переработка и продажа

есть еще midstream - обработка, хранение, транспортировка