A NovelApproach for the TotalAmount of Clay in Clastic Reservoirs

Key words: 
• clay minerals /
• X-ray diffraction /
• particle radius /
• total amount /
• clastic reservoirs

Abstract: On the basis of experimental ana lysis, a new method, twice grain size segregation plus X-ray diffraction of randomly oriented powers of clay minerals, was put forward to calculate the total amount in clastic reservoir rock.Firstly, particles of which radius less than 10μm and 10 to 64μm w are separated from the samples by the way of traditional segregation of clay minerals, and then weigh them respectively. Secondly, the weight of the part of clay minerals in the particles with radius 10 to 64μm can abe available by means of analysis of X-ray diffraction of randomly or-iented powers of clay m ineral. Finally, the first part of clay minerals. weight plus the second part, the total amount of clay of the sample can be obtained. In order to concretely discuss the course and the effect of practical application of the method, clastic reservoirs in WN oil field was introduced. The study result ind icates that themethodment ioned in the paper has simpler principle,higher precision, good theorization and show s a satisfactory effect, so it is a reliab le approach for the total amount of clay in clastic reservoir rocks.