Sourceless formation evaluation reduces HSE risks

摘要

Avoiding chemical sources saves time and money logging a directional well in Egypt. Pulsed neutron generator (PNG) technology has been successfully used by the well logging industry for years to acquire a variety of measurements. This radioisotope-free source of high-energy neutrons has been used in wireline-conveyed logging tools for various commonly used measurements such as neutron porosity, spectroscopy, and thermal neutron capture cross section (also known as sigma). These are all acquired without the need for chemical sources such as americium-beryllium. Recent developments have extended the suite of measurements to include a radioisotope-free bulk density measurement, eliminating the need for cesium sources. This density is referred to as the sourceless neutron-gamma density (SNGD).