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My — Oil & Gas Glossary

Abbreviation for million years. The preferred abbreviation is Ma.

← All “M” terms Browse full glossary

Related Terms

MBT test

A test to determine the amount of clay-like materials in a water-base drilling fluid based on the amount of methylene bl

MD

The length of the wellbore, as if determined by a measuring stick. This measurement differs from the true vertical depth

MMH

A compound containing hydroxide anions in association with two or more metal cations. MMH particles are extremely small

MMS

A product similar to mixed-metal hydroxide, but based on silicate chemistry

MMscf

Abbreviation for million standard cubic feet, a common measure for volume of gas. Standard conditions are normally set a

MODU

A generic term for several classes of self-contained floatable or floating drilling machines such as jackups, semisubmer

MRS

(noun) Abbreviation for Magnetic Reversal Sequence. A chronostratigraphic tool based on the record of periodic reversals

MSDS

A specific document that shows important physical and chemical characteristics of a chemical or product to alert a user,

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