MLchartDataset catalogue

Cushion

Term · Oil and gas · MLC-T-OAG-000930

A column of fluid, such as water, brine, or diesel, placed in the drill string before running a drillstem test (DST). The cushion's hydrostatic pressure partially balances the formation pressure, which prevents formation damage and uncontrolled flow when the test tool is opened. The height and density of the fluid column are selected to achieve a specific underbalance against the expected reservoir pressure.

Table 1. Record
IdentifierMLC-T-OAG-000930
FieldOil and gas
SubjectWell Testing
Record as JSON 
{
  "id": "MLC-T-OAG-000930",
  "term": "Cushion",
  "field": "Oil and gas",
  "definition": "A column of fluid, such as water, brine, or diesel, placed in the drill string before running a drillstem test (DST). The cushion's hydrostatic pressure partially balances the formation pressure, which prevents formation damage and uncontrolled flow when the test tool is opened. The height and density of the fluid column are selected to achieve a specific underbalance against the expected reservoir pressure.",
  "subject": "Well Testing",
  "url": "https://mlchart.com/terminology/oil-and-gas/cushion/"
}

Record 997 of 4,469 in Oil and gas terminology (MLC-0103). Request the full dataset.