Editing Connate fluids (section)

{{short description|Liquids that were trapped in the pores of sedimentary rocks}}
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In [[geology]] and [[sedimentology]], '''connate fluids''' are liquids that were trapped in the pores of [[sedimentary rock]]s as they were deposited.  These liquids are largely composed of [[water]], but also contain many [[mineral]] components as [[Ion|ions]] in [[Solution (chemistry)|solution]].<ref>{{cite web |url=http://www.glossary.oilfield.slb.com/Display.cfm?Term=connate%20water |title=Connate water |archive-url=https://web.archive.org/web/20110718164016/http://www.glossary.oilfield.slb.com/Display.cfm?Term=connate%20water |archive-date=July 18, 2011 |website=Schlumberger Oilfield Glossary}}</ref>

As rocks are buried, they undergo [[lithification]] and the connate fluids are usually expelled.  If the escape route for these fluids is blocked, the pore fluid [[pressure]] can build up, leading to [[overpressure (geology)|overpressure]].