Damage-Remediation Chemicals

Throughout a well’s lifetime, paraffin, asphaltenes, inorganic scale and emulsion blockages can build up in the near-wellbore area, causing formation damages that restrict the flow of fluids and gases, resulting in decreased production and increased lifting cost. Baker Hughes introduced a series of chemicals for near-wellbore damage (CNDs) that help restore wells to a healthy, productive state by removing multiple skin-­damage problems with a single, time-saving treatment. The CND remediation treatments are made from ­specially-formulated multifunctional microemulsions that remove existing damage and leave the formation surface water-wet for easier and faster hydrocarbon production. The chemicals are applied directly down the annulus or production tubing, requiring no additional equipment so that major investment is avoided. The chemicals can be used in conventional and unconventional mature fields, gas-storage wells, production and injection wells, and disposal wells. Additionally, these products can be combined with the acids used in traditional stimulation methods to protect against common side effects such as asphaltene destabilization and rigid film emulsions that may lead to additional formation damage.

Baker Hughes’ near-wellbore-damage-remediation chemicals at work. (1) Near-wellbore formation damage slows or prevents oil flow into the well. (2) CND treatments penetrate and dissolve or disperse the skin damage. (3) After a 24-hour shut-in period, production is resumed and deposits are removed. (4) The formation is returned to a healthy production state; surfaces are water-wet with no organic deposits.