Proper fluid selection minimizes damage
Journal Article
·
· Drilling Contract.; (United States)
OSTI ID:5871237
The proper selection of workover and completion fluids is an important factor in minimizing the possibility of formation damage and production loss while meeting specific job requirements. Since no one fluid has universal application, numerous fluid systems are available to workover or complete producting wells. These systems can be broken down into several major categories which include solids free or clear fluids, oil or invert emulsion fluids, polymer viscosified brines (containing acid, water, or oil soluble bridging agents and/or water soluble weighting materials), conventional water based fluid, and foam. Several types of damage may occur in a given formation: (1) swelling or dispersion of clays, (2) solids invasion, (3) wettability changes, (4) chemical reactions between filtrate and formation water, and (5) the formation of emulsions. The degree of damage that results from these types is dependent upon the formation and the type of fluid used during workover or completion operations. The well's susceptibility to formation damage should determine the type of fluid to be used. Thee criteria for controlling damage are discussed.
- OSTI ID:
- 5871237
- Journal Information:
- Drilling Contract.; (United States), Journal Name: Drilling Contract.; (United States) Vol. 38:7; ISSN DRCOA
- Country of Publication:
- United States
- Language:
- English
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