



Neutron log Well logging measurement Neutron log القياسات التى تتم عن طريق النيوترون اثناء تسجيلات الابار



Neutron tools measure the amount of hydrogen in the formation and relate it to porosity





High hydrogen content indicates water or liquid hydrocarbons





shale sedimentary rocks don't contain hydrogen in their composition





or





Is a porosity logging tool which depends on the presence of hydrogen which may be found in oil, water, gas or chemical composition of some rocks such as shale





The neutron log is the most affected by shale









theory





Neutron are electrically neutral particles with a mass approximately equal to that of a hydrogen atom





High-energy neutrons are emitted from the chemical source





The neutrons collide with a nucleus of the formation minerals in elastic-type collisions





Neutron will lose the most energy when they hit something with equal mass such as hydrogen atom and enter in the thermal state





A few microseconds after being released, the neutron has lost significant energy and enter the thermal state





When in the thermal state, the neutron is captured by the nucleus of other atoms





The detector on the tool may detect epithermal neutrons or high energy gamma ray of capture





Compensate neutrons tools detect epithermal neutrons and use a ratio of near-to-far detector counts to determine porosity





Sidewall neutron tools detect epithermal neutrons and have less matrix effect





The type of neutron logging tools









( CNL ( COMPENSATE NEUTRON





Detect thermal neutron





Has one source and two detector





Can be used in either uncased or cased hole













( SNP ( SIDE WALL LOGGING TOOLS





Detect epithermal neutron





Has asingle detector





Can be used in open hole





( DNL ( DUAL NEUTRON LOG





( TDT ( THERMAL DECAY TIME





Neutron application





Can be used to determine porosity





Determine the amount of liquid filled the zone





Can be used in combination with neutron to determine saturation and lithology





طريقه عمل تسجيل للابار عن طريق النيترون





هى طريقه تستخدم لمعرفه كميه الهيدروجين الموجود داخل البئر ومن خلاله يمكن معرفه ماذا كان هذا البئر يحتوى على كميه كبيره من الماء او السوائل





ومن خلال ذالك يمكن مقارنتها بمساميه التربه ومعرفه مدى وجود مساميه فى التربه من عدمه









القياسات التى تتم عن طريق النيوترون اثناء تسجيلات الابار



