References

�      "Schlumberger Oilfield Glossary," by Schlumberger Limited (2003).

�      "Fundamentals of Petroleum Fourth Edition," by Kate Van Dyke (1997).

�      "Petroleum Fundamentals Glossary," by Petroleum Extension Service, Division of Continuing Education, The University of Texas at Austin (1990).

�      "PDMUR Complete Usage Rules," by Schlumberger Limited (2002).