New available ways to increase oil and gas well productivity using coiled tubing without resorting to standard engineering solutions for well recovery

01.10.2014

If we descended to the hole bottom, we would at once understand why at a wide perforation range (often more than 50 or 200 m) attenuation of the well rate takes place. After taking a look at the perforations we would immediately assess how clogged they are with asphalt, resin and paraffin deposits (if it is an oil-yielding well) or methane hydrates (if it’s a gas well).

But why did it happen shortly after bringing the well into production? That way the well can be lost entirely with all ensuing negative consequences. Unfortunately, there is one reason for that: the thermobaric regime of oil and gas filtration was disturbed in the formation system at the entry to the bottom-hole zone. In case of the rapid change in the movement rate of hydrocarbons, conditions for the penetration of asphalt, resin and paraffin compounds occur in the oil flow and in case of the gas flow conditions are created for the formation of solid methane hydrates.

If such disturbance of the thermobaric regime is not eliminated, negative consequences will not be long in coming and can even cause the operating well to become inactive or be removed from the balance sheet.

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