Method for drilling and treating subterranean formations using a low fluid loss agent. [for reducing permeability of oil-containing subterranean formation]
Patent
·
OSTI ID:7329251
Well drilling, completion and workover operations, hydraulic fracturing, acidizing, and other well treating operations are improved by the addition to the drilling or treating fluid of an oil-soluble, water-insoluble low fluid loss agent comprising a particulated, homogeneous solid solution of (1) wax; (2) an oil-soluble polyhydroxy higher fatty acid partial ester surface-active agent; and (3) a water-dispersible surface-active agent such as polyoxyethylene alkyl phenol, a polyethylene glycol higher fatty acid ester, a polyoxyethylene polyhydroxy higher fatty acid ester, a polyoxyethylene tertiary fatty amine, or a polyoxyethylene fatty amide condensate. The agent can optionally include small amounts of a polymeric material and/or a higher fatty alcohol. 8 claims.
- Assignee:
- Union Oil Co. of California
- Patent Number(s):
- US 3979304
- OSTI ID:
- 7329251
- Country of Publication:
- United States
- Language:
- English
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