One week to go..., page-35

From the imbibition articles around half of the remaining fracture fluid can be imbibed, but varies considerably dependent on rock type. Working with half 14% remains to be backflowed prior to substantial amounts of hydrocarbon reaching the well.
We know 28000 barrels were injected during the stimulation, so 7% of that is, 1960 barrels frak juice flow we can expect before kick off is fully in play. In the week of flow after the initial stimulation 13% was recovered, giving an average 520 barrels/day recovery rate, as a proven capability at full reservoir pressure with a fresh frack.
After completion of the 6 weeks shut in, the pressure recovery data will be retrieved and analyzed before a recovery flow rate is chosen.
Even assuming 200 b/d is chosen that's about 10 days,( at 500 4 days). It is important to recall the objective is to remove the water based frac fluid so that hyrocarbons will now occupy the well bore/production tubing. They are considerably lighter, and will reduce the back pressure the hydro static head creates. Currently that is around 5000 psi with water and would expect to reduce to around 3000 psi when replaced with oil and its associated gas.
Then the real test begins with nearly double the differential pressure available and remembering that the oil in the reservoir is a super critical fluid ( a form of gas) and will flow like a gas, not like a liquid. The attraction forces between the molecules are much lower in gases compared to liquids allowing them to flow freely and diffuse through solids and tight fractures.

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