The first returns to surface indicate a mixture of hydrocarbon gas, CO2 and brine, although it is not fully clear yet whether the brine is formation water
or disintegrated mud due to CO2, or both.
Nine Drill Stem Tests (DSTs) were conducted sequentially over 46 hours over the majority of the coals to evaluate permeability via the recovery of formation water
. A preliminary review indicates permeability is in line with expectations at this location and that vertical well development of this region could be successful.
Hurricane undertook two flow tests, requiring an Electrical Submersible Pump, predominantly recovering drilling brines and formation water
with oil and gas traces.
A week-long pressure build-up test has taken place at the portland discovery, which is continuing to produce at a stable rate of more than 220 barrels of dry oil per day with no formation water
produced to surface so far.
In a second round of simulations, H2O molecules were added to mimic the "formation water
" that is often present beneath oil and gas drilling sites.
resistivity represents the resistivity value of the water which is uncontaminated by the drilling mud that saturates the porous formation.
The produced water can come from two sources: water vapor in the gas that condenses into liquid water and formation water
containing salts .
The crude oil and formation water
are from Dagang oil field; high speed centrifuge is used to remove the sediments in formation water
and crude oil.
Therefore, when the surfactant fracturing fluid meets the appropriate amount of formation water
and oil gas, the intermolecular interaction distance between the surfactant and salt will increase.
The experimental water is the simulated formation water
based on the results of water quality test configuration, the mineralization degree is 200000 mg/L at 20[degrees]C, and the viscosity is 1.15 mPa x s.