..., Morgan, Marsden, Luseland, Plover Lake, Bear Trap, Marwayne, and Wolf Lake. Several wells that had never produced much oil were improved to be economic producers. Blocked wells, where oil rate drops seemed to be associated with perforation plugging or stable sand arch formation, were substantially...

... and the principles of gas/liquid separation. separation perforated sub separator flow rate liquid capacity assembly production monitoring seating nipple collar-size gas separator diameter production control reservoir surveillance downstroke artificial lift system gas separator beam pumping...

... wells that had not been considered acid stimulation candidates due to their total productivity. Propellant was used as a perforation breakdown technique after pumping the Gel treatment and prior to the acid stimulation. This paper will briefly discuss the evolution of the Gel and acid fracturing...

... together by this asphaltene type ‘cement’, the wellbore can eventually clog. Producing heavy oil through this blockage would be similar to filtering cold molasses through a high mesh filter. Methods used to correct inflow problems due to asphaltenes have typically involved re-perforating or the use...

... of the perforations, measuring and transmitting the producing bottom hole pressures and temperaturesto the surface for instantaneous control of the surface pumping motor speedthis insures the lowest possible fluid level back pressures, this allowing forthe highest possible fluid entry into the wellbore from...

... of pressure drop across a single perforation is inadequate in its prediction capability for the experimental range used; and at sufficiently high perforation-to--axial flow velocity ratios, the dominant factor determining the pressure drop across a single perforation is a constriction disruption, or venturi...

... these objectives. They include rigorous flowbacks, acid washes of the existing perforations, perforating additional intervals as well as re-shooting over the existing perforations, and selective acidization. An analysis of more than 50 such workovers has indicated that selective acidizing is probably the most...

... are identified which are in agreement with those identified from field oil and water production rates. Production from wells before steaming, completed with or without casing and perforations, also shows the presence of water-in -bitumen emulsions. The implication of emulsion flow in porous media...

... Abstract The productivity of perforated completions are greatly reduced when fines are mobilized causing particles to plug pore throats within a formation. Even in clean sands, relatively large quantities of particulate matter are present Mobilization of these fines occurs as fluid velocities...

... occur at very early time. pressure recorder rrd mpp liquid level pressure transient analysis wellbore drillstem testing reservoir classical phase redistribution hump wellbore dynamic drillstem/well testing pressure trend sandface presentation perforation recorder upstream oil...

... by conventional solvent or solvent/acid treatments, and hot oiling treatments. References and illustrations at end of paper Introduction The deposition of hydrocarbon material occurs in the near wellbore area, formation face and perforations. These deposits can consist of paraffins, asphaltenes, emulsions...

... adaptability of the acidizing method. Acid stimulation in the Arcs member had, in the past, consisted of batch washes until the zone would no longer hold a fluid column. Recent recompletions had resulted in the need for a method of selectively acid washing to ensure that new perforations were open to allow...

..., immediate, partial crosslink.ing plus high-temperature viscosity. This ensures adequate cool viscosity to carry high proppant concentrations through the perforations plus temperature-stable viscosity. Field testing confirms the advantages of these systems. Introduction Cross linked fracturing fluids were...

... are naturally permeable, as derived from the analysis, permits optimization of completion programs by perforation of only those zones capable of production. Comparison of actual production with that predicted determines the success of the completion and the effectiveness of the stimulation technique...