Method for determining permeability contribution value of reservoir

• Main Authors: SI ZHAOWEI, NI LUQIAO, CHENG DAOXIE, BAI SONGTAO, WAN JINBIN, XU FENG, GUO XIAOKAI
• Format: Patent
• Language: English
• Published: 25.02.2015
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

The invention discloses a method for determining a permeability contribution value of a reservoir, and belongs to the field of reservoir evaluation. The method comprises the steps: firstly carrying out a physic experiment and a nuclear magnetic resonance T2 experiment on a rock core, acquiring the core porosity, permeability and nuclear magnetic resonance T2 spectrum data, and calculating the permeability contribution value of the reservoir by utilizing nuclear magnetic resonance porosity components and the corresponding relaxation time. The method for determining the permeability contribution value of the reservoir by utilizing the nuclear magnetic resonance porosity components and the corresponding relaxation time in the low-permeability rock reservoir is realized, the variation process of the permeability accumulated contribution value of the reservoir can be accurately and reliably acquired according to nuclear magnetic data, the relation between the permeability accumulated contribution value and the relaxation time can be analyzed, the standard for dividing a porosity space by utilizing the permeability accumulated contribution value is established, and reliable reservoir parameters can be provided for the evaluation on the exploitation of the large-area low-permeability reservoir and the development of oil deposit in China.