Hydrodynamic impact on the formation

Increasing the injectivity of injection wells by the method of no-pass hydrodynamic impact of the formation

Sequence of work

Preparatory work:

• The well is disconnected from the conduit by the operator of the Customer’s shop;

• Arrangement of equipment, piping of the mouth, filling the topping tank from the conduit.


Conducting hydrodynamic impact on the formation:

• Measurement of injectivity by hydrodynamic impact on the formation;

• Injection of fluid into the formation at maximum flow rate under pressure not exceeding the stock tubing pressure testing limit/pressure release – cyclical repetition of this operation in order to drain the formation. As a result, the bottomhole zone is washed, a network of artificial fractures is created, and an initial increase in injectivity is achieved (the duration of the operation depends on the progress in injectivity);

• Pumping the acid composition into the formation (Customer’s contractor);

• Acid reaction in the formation (2 hours);

• Dissipation of acid reaction products by injecting fluid into the formation with NEKKO’s pump units.


Final works:

Dismantling of hydrodynamic impact equipment, connection of the well to the water line by the operator of the Customer’s workshop, cleaning of the territory.

Economic efficiency indicators

• Reanimation of wells with a large radius of formation contamination by creating a network of cracks in the bottomhole zone of the formation and filtration of acid compositions through them deep into the formation;

• The hydrodynamic impact uses stock tubing and packer (without lifting it out of the well);

• No costs are required to prepare the well for work;

• There is no need to saturate the formation before hydrodynamic impact;

• During hydrodynamic impact no well workover crew is required, the work is carried out without approach;

• The average duration of work is 6 hours (from the moment the well is driven away from the water conduit until the moment of tamping back to the water conduit).

Advantages of hydrodynamic impact

  1. Increased injectivity of injection wells

  2. Resuscitation of wells with a large radius of formation contamination by creating an additional network of fractures in the bottomhole zone through dynamic impact and the use of acids

  3. Fast delivery of acid reagents to the formation

  4. Pumping acid compositions and/or water into the injection well formation at hydraulic fracturing pressure

  5. Recovery of wells with zero injectivity

Implemented projects

Application of Clean Well technology (well bottomhole normalization after hydraulic fracturing) at Rosneft facilities in Khanty-Mansiysky Okrug

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Project PitMSFrac, Bashkortostan

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Development of wells with a jet pump during geological exploration in the Yamalo-Nenets Autonomous District

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Project “PEV – Online”, Irkutsk region

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