SLICK WILLIE™ – OF STICKS are primarily used to remove water and condensate from gas wells and increase gas production. The foaming action decreases the hydrostatic back-pressure which increases gas production that further enhances the foaming action until the well unloads.
SLICK WILLIE™ – OF STICKS can be used to remove condensate and water from gas-condensate wells and flowing oil wells. Part of the stick contains water-foam with the balance being useful as condensate and oil remover.
SLICK WILLIE™ – OF STICKS contain 100% active chemicals in a water soluble tube that can produce up to four (4) times more foam than some other sticks on the market. The entire stick (tube, caps, and contents) are water soluble. The sticks are shipped ready-to-use and will not dissolve while in cool dry storage.
SLICK WILLIE™ – OF STICKS can develop stable foam in high temperature deep gas wells. Lab tests indicate that stable foam can be developed at 212ºF and above. For extremely high temperature wells the formulation can be altered.
SLICK WILLIE™ – OF STICKS are an economical way to remove water and oil from gas wells without using expensive well service operations such as swabbing, jetting with coiled tubing, or installing artificial lift and siphon strings.
TREATMENT DETERMINATION & PROCEDURE FOR WATER REMOVAL
The number of SLICK WILLIE™ – OF STICKS to be used is based on the volume of water above the perforations. Field tests indicate that the best results were achieved by using a larger initial slug treatment of 1/8 to ¼ percent by weight of SLICK WILLIE™ – OF STICKS to fluid above the perforations. A treatment of 1/8 to ¼ percent by weight would require .44 to .88 LB of stick per BBL of water.
|SLICK WILLIE™ – OF STICK SIZE||STICKS PER BBL (Initial Treatment)|
|JUNIOR SF-100 (1 ¼” X 18”)||½ to 1 sticks per 1 BBL of water|
|JUNIOR SF-50 (1 ¼” X 9”)||1 to 2 sticks per 1 BBL of water|
|MIDGET SF-25 (3/4” X 15”)||2 to 4 sticks per 1 BBL of water|
The above amount is recommended for an initial slug treatment. In many cases, removing the top few hundred feet of fluid may be sufficient to allow the production of natural gas to blow out the remaining fluid in the well. To determine the optimum amount for periodic treatments you may choose to gradually reduce the initial treatment amount until the most economical point is reached. Periodic treatments with SLICK WILLIE™ – OF may be necessary to prevent production decline due to the gradual fluid build-up. It is much easier to maintain gas production with regular insertion of SLICK WILLIE™ – OF STICKS than it is to kick off a dead well. Gas bubbling though water is necessary to create foam. If a well is totally dead, GAS STICKS™ may be used in conjunction with SLICK WILLIE™ – OF STICKS to provide agitation energy.
THE MOST COMMON PROCEDURE
Shut-in the well and drop sticks through a lubricator. Wait 30 minutes or until sticks dissolve then slowly return well to normal production. Repeat procedure if or when it becomes necessary. FOR HIGH RATE WELLS (after sticks have dissolved) flow well at about 25% of pretreatment rate for about 30 minutes or until foam reaches surface then return to normal production. FOR SHALLOW OR LOW RATE WELLS leave well flowing while dropping sticks.
The estimated hydrostatic back-pressure reduction for each BBL of water removed (for various tubing sizes) is shown below: (Based on .43 PSI per foot of depth)
|2 3/8 INCH||100 PSI REDUCTION FOR 1 BBL OF WATER REMOVED|
|2 7/8 INCH||75 PSI REDUCTION FOR 1 BBL OF WATER REMOVED|
|3 ½ INCH||50 PSI REDUCTION FOR 1 BBL OF WATER REMOVED|
The sticks will normally dissolve in 30 to 90 minutes depending on temperature, salt content, and relative water motion. The melting point of the sticks is 140ºF. The stick will dissolve in fluid in wells with BHT below 140º (just at a slower rate). Lab tests indicate (tube & contents) will dissolve in 90 minutes @ 100º, 62 minutes @ 120º, 25 minutes @ 140º, and 15 minutes @ 180º. The specific gravity is 1.16. The falling rate through fresh water is approximately 100 feet per minute. The sticks can free fall (through air) 3,000 feet in about 15 seconds. Gas moving up tubing will often change falling characteristics.
Sticks are packaged in plastic chests, plastic tool boxes, cardboard cartons and drums.
As with all industrial chemicals, contact with eyes or skin should be avoided. Wash thoroughly with water. Sticks should be stored in a cool dry place. Always remove stick from plastic bag or paper tube before using. Bag or tube can be used as a glove to avoid contact with hands.