Low-resistance hydrocarbon reservoir conductivity evaluation method based on XRF element logging technology

• Main Authors: GUO HUAIYU, XIANG XIAO, LIU DENGWEN, ZHANG XUEZHONG, ZHANG ZE, HUANG WANGUO, MENG SHUHUA, LI ZHIQIANG, HU XUEWU, YANG KAICHENG
• Format: Patent
• Language: Chinese; English
• Published: 21.03.2025
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a low-resistance hydrocarbon reservoir conductivity evaluation method based on an XRF element logging technology. The method comprises the following steps: determining a main internal cause causing low resistivity; determining main minerals influencing the low resistivity of the sedimentary rock; setting an element conductivity index; dividing the element into a low-conductivity region, a middle-conductivity region and a high-conductivity region according to the interval size of the element conductivity index, and determining the type of the reservoir according to the three regions. According to the method, on the basis of element analysis of rock mineral components of a regional target low-resistance hydrocarbon reservoir, the correlation between the mineral components and rock conductivity is obtained through inversion, optimal mineral evaluation parameters are selected, element conductivity indexes are established, and the reservoir type is determined according to the element conduc