Technology and equipment for well stimulation by high-energy methods
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Well stimulation

Application technology CPG-100 in acid-ammonia medium

Application technology CPG-100 in acid-ammonia medium

I – pumping of acid-ammonium medium into the well and lowering pressure generator CPG-100;

II – burning of acid-ammonium medium;

1 – tubing;

2 – producing string;

3 – well fluid;

4 – acid-ammonia medium;

5 – powder pressure generator;

6 – production zone;

7 – perforations.

Nowadays ammonium acid compositions are being designed. They allow operating in oil and gas wells with temperatures up to 170 ⁰C and hydrostatic pressure up to 120 MPa.

Inflammation of the acid-ammonium medium is made by means of pressure generators GDK-100. When burning an acid ammonium medium, conditions for fracturing occur in the hole. Duration of the positive phase of the pressure pulse can reach a few tens of seconds and give rise to residual cracks longer than 10 m. In addition, acid ammonium medium has high detergency and during injection into the formation and washes pores of collector from asphaltene sediments.
Combined Perforator-Gas Generator KPG105
Combined Perforator-Gas Generator KPG105

KPG105 Combined Perforator-Gas Generators are used for jet perforating with simultaneous gas-dynamics treatment of bottomhole zone, in order to stimulate well production..

Parameters Value
Outer diameter, mm 105
Minimal inner diameter of casing, mm 125
Average service life, volleys 25
Maximum allowable temperature, оС 150
Maximum allowable hydrostatic pressure, MPa 60
Shot density, shot per meter 10
Phasing, degrees 60, 90
Number of propellant chambers 2
Maximum number of propellant charges in one chamber 6
Propellant charge weight, kg 0,5
Minimum allowable hydrostatic pressure, MPa 5
Maximum pressure of combustion products in chamber, MPa 100
Currently well production rate decrease is observed practically in all Russian and Commonwealth of Independent States's fields. In addition many oil and gas fields with difficult geological-and-technical conditions are implemented now. Therefore, well stimulation technologies are in good demand in Russian and abroad.
One of methods of solution of this problem is well stimulation by explosive energy application for the gas-dynamic borehole treatment. This method is based on formation breakdown by high-energy treatment of combustion products of solid and liquid combustible-oxidizing compositions.
The result of gas-dynamic treatment is cyclical "repressive-depressive" dynamic influence to the borehole. Time of this influence is more than the combustion time. Thereby there are mechanical, thermal and physical-chemical effects to the formation. Extending cracks fixation is not required here, because the formation is irreversibly deformed under high-speed dynamic load.
STS-GeoService works in the field of gas-dynamic treatment methods from 1993 year. We design the required technique and technologies for various geological-and-technical conditions.