Changes

===Sampling===

===Sampling===

A truly representative sample can best be obtained from the flow line. Another sampling method is by drill stem tests, although this water is usually contaminated with filtrate from the drilling mud. (For more details, see [[Drill stem testing]].) Additional sampling methods include formation testers such as the formation interval tester (FIT) and the repeat formation tester (RFT), which due to their ability to hold a limited volume, usually recover only filtrate. (For more on formation testers, see [[Wireline formation testers]].)

A truly representative sample can best be obtained from the flow line. Another sampling method is by drill stem tests, although this water is usually contaminated with filtrate from the drilling mud. (For more details, see [[Drill stem testing]].) Additional sampling methods include [[Wireline formation testers|formation testers]] such as the formation interval tester (FIT) and the repeat formation tester (RFT), which due to their ability to hold a limited volume, usually recover only filtrate. (For more on formation testers, see [[Wireline formation testers]].)

===Analytical methods===

===Analytical methods===