RE: MURPHY HITS A GOOD ONE Good one, Rigrat. Naturally flowed 300 bbl/day of high-quality oil for 42 consecutive days ON A SMALL CHOKE!! That speaks for itself. Very Positive!!
For some that may not have understood "overpressure", this Murphy well shows what that overpressure can do for oil production in this area. Also, for informations sake, a choke is a fixed or adjustable device that is placed in a flowline to adjust flow rates, usually measured in 64th's of an inch. When chokes are used with down hole pressure recorders, they show valuable information to reservoir engineers to calculate potential volume of the reservoir. With a well shut in, the recorders show down hole static (not moving) formation pressure. When the well is opened to flow, the recorders will show a drop in pressure as flowing reservoir pressure. The more it is opened to flow, the more the flowing bottom hole pressure will drop (drawdown pressure). In a reservoir, you want to see flowing drawdown pressures remain close to static formation pressure to indicate a large reservoir. On the other hand, if flowing pressures gradually show a reduction of pressure, it could indicate a small reservoir. in any case, managing the well during initial production should be delicately handled to avoid formation damage to the producing zone. Ideally, and especially in a new production area, giving the well time to flow and "clean up" is prudent.