FRACTIONAL FLOW

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TIGHT OIL AND OIL SAND VERSUS SMALL DEEP WATER DEVELOPMENTS, SOME OBSERVATIONS

This post which is based on results from earlier research and analytic work posted on The Oil Drum, Fractional Flow and not least in recent (private) discussions with other international acknowledged experts present some facts and observations about developments of tight oil (which to some extent also applies to oil sands) versus small deep water discoveries*.

*Small deep water discoveries are here meant discoveries with Estimated Ultimate Recovery (EUR) below 100 Million Barrels of Oil Equivalents (MBOE).

Figure 1: Chart above shows relative developments in annualized yield curves (lh scale) of oil for so-called elephants (Norwegian deep water discoveries estimated to hold ultimate recoverable reserves (EUR) above 1,000 million barrels with crude oil [red lines]). Small discoveries (Norwegian deep water discoveries estimated to hold ultimate recoverable reserves (EUR) below 100 million barrels with crude oil, [green lines]). The reference tight oil well for Bakken [violet lines]. The cumulative versus time is plotted against the rh scale.  Note also the short high flow life cycles of small deep water developments and tight oil.

Figure 1: Chart above shows relative developments in annualized yield curves (lh scale) of oil for so-called elephants (Norwegian deep water discoveries estimated to hold ultimate recoverable reserves (EUR) above 1,000 million barrels with crude oil [red lines]).
Small discoveries (Norwegian deep water discoveries estimated to hold ultimate recoverable reserves (EUR) below 100 million barrels with crude oil, [green lines]).
The reference tight oil well for Bakken [violet lines].
The cumulative versus time is plotted against the rh scale.
Note also the short high flow life cycles of small deep water developments and tight oil.

One big takeaway from the chart above is that both developed small deep water discoveries and tight oil wells have steep decline rates and short high flow life cycles. These are now the major sources that offset declines from the bigger, heavily depleted legacy fields (with long productive life cycles) and provide any growth in global oil supplies.

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