| dbo:abstract |
Drilling fluid invasion is a process that occurs in a well being drilled with higher wellbore pressure (normally caused by excessive mud weights) than . The liquid component of the drilling fluid (known as the , or spurt) continues to "invade" the porous and permeable formation until the solids present in the mud, commonly bentonite, clog enough pores to form a mud cake capable of preventing further invasion. If invasion is severe enough, and reservoir pressures are unable to force the fluid and associated particles out entirely when the well starts producing, the amount of oil and gas a well can produce can be permanently reduced. This is especially true when a process called occurs. This is when a fluid enters a formation that is below its of that fluid. Once the fluid is present, it is held in place by capillary forces and usually can not be removed. Invasion also has significant implications for well logging. In many cases the "depth of investigation" of a well logging tool is only a few inches (or even less for methods such as sonic logs), and it is quite possible that drilling fluid has invaded beyond this depth. In these cases readings are strongly influenced by mud filtrate properties rather than pure formation (in situ) properties. This influence must be considered when interpreting the resulting logs. (en) |
| dbo:wikiPageExternalLink |
https://books.google.com/books%3Fid=6VM0Xqxe0QUC&pg=PA56%7Cdate=21 |
| dbo:wikiPageID |
8236339 (xsd:integer) |
| dbo:wikiPageLength |
1882 (xsd:nonNegativeInteger) |
| dbo:wikiPageRevisionID |
1079858597 (xsd:integer) |
| dbo:wikiPageWikiLink |
dbc:Drilling_fluid dbc:Well_logging dbr:Bentonite dbr:Drilling_mud dbr:Well_logging dbr:Mud_cake_(oil_and_gas) dbr:Sonic_logging dbr:Resistivity_logging dbr:Formation_pressure dbr:Irreducible_saturation dbr:Mud_filtrate dbr:Phase_trapping |
| dbp:wikiPageUsesTemplate |
dbt:Cite_book dbt:Petroleum-stub dbt:Petroleum_industry |
| dct:subject |
dbc:Drilling_fluid dbc:Well_logging |
| gold:hypernym |
dbr:Process |
| rdf:type |
dbo:Election |
| rdfs:comment |
Drilling fluid invasion is a process that occurs in a well being drilled with higher wellbore pressure (normally caused by excessive mud weights) than . The liquid component of the drilling fluid (known as the , or spurt) continues to "invade" the porous and permeable formation until the solids present in the mud, commonly bentonite, clog enough pores to form a mud cake capable of preventing further invasion. (en) |
| rdfs:label |
Drilling fluid invasion (en) |
| owl:sameAs |
freebase:Drilling fluid invasion wikidata:Drilling fluid invasion https://global.dbpedia.org/id/4iZFJ |
| prov:wasDerivedFrom |
wikipedia-en:Drilling_fluid_invasion?oldid=1079858597&ns=0 |
| foaf:isPrimaryTopicOf |
wikipedia-en:Drilling_fluid_invasion |
| is dbo:wikiPageWikiLink of |
dbr:Underbalanced_drilling dbr:Bentonite dbr:Resistivity_logging |
| is foaf:primaryTopic of |
wikipedia-en:Drilling_fluid_invasion |