Abstract: This study discussed in detail the differences between commercial oil-gas flow standard and industrial oil-gas flow standard based on market economic principle and in view of practice for petroleum exploration and development, proposed basic idea for determination of commercial oil-gas flow standard, and establish chart of commercial oil- gas flow standard for an integrated oilfield and reservoir with “three lows” vs crude marketing price and reservoir-buried depth as well as its binary functional equation, by means of “reverse-derived method” for tech-economic assessment of reserves. It means that introduction of commercial oil-gas flow standard into early reservoir evaluation can replace original industrial oil-gas flow standard that could not reflect crude marketing status,thus converting industrial value of oil wells defined by static standard into commercial value of oil wells by dynamic standard. The commercial oil-gas flow standard is allowed to continuously change with crude marketing price, burial depth, reserve scale and operating management of field.

Key words: industrial oil-gas flow standard, commercial oil-gas flow standard, operating cost, crude oil price, reserve scale, binary functional equation