The Effect Of Sonic Logs On The Petroleum Industry And The...

Logging is a method which has been used over a period of time to better understand subsurface parameters and reservoir conditions. The Acoustic or Sonic log is one such method which is used in combination with density and neutron logs in order to determine these parameters. Full-waveform acoustic logging has advanced significantly in both theory and application in recent years, and these advances have greatly increased the capability of log analysts to measure the physical properties of formations (Paillet et al 1992). This report focuses on the basic application of sonic logs in the petroleum industry and the current advances made in their application. It is also explained how porosity of the rocks are obtained from shaly formations using sonic logs. The principle of sonic logging involves a transmitter and a receiver wherein a signal is sent from the transmitter and the amount of time taken until it has reached the receiver is recorded. The speed of sound in the subsurface depends on the elastic properties of the rock matrix, the porosity of the formations, fluid content and pressure of the formation (Petroleum Transactions, Members AIME 1958). Sonic logging is carried out after the well has been drilled. Background: History of Sonic Logs Sonic logs were first introduced in the 1920s as a part of surface seismic techniques in in oil and gas exploration. In the beginning there was an obvious interpretation problem between the time and depth correlation. Although theShow MoreRelatedTeaching Notes Robert Grant - Strategy 4th Edition51665 Words   |  207 Pages26 3 The US Airline Industry in 2002 33 4 DaimlerChrysler and the World Automobile Industry 41 5 Wal-Mart Stores Inc., May 2002 49 6 Eastman Kodak: Meeting the Digital Challenge 62 7 Organizational Restructuring within the Royal Dutch/Shell Group 70 8 Harley-Davidson, Inc., January 2001 77 9 Online Broking Strategies: Merrill Lynch, Charles Schwab and E*Trade 83 10 11 12 Emi and the CT Scanner [A] [B] 88 Rivalry in Video Games 98 Birds Eye and the UK Frozen Food Industry 109 1 CONTENTS