Method for distinguishing calcareous mudstone from sandstone

• Main Authors: XU SHUFANG, JIANG RUIBO, MA LICHI, SUN CHAO, ZHANG YUE, GUO YUXIN, WEI XIAOYAN, XIONG WEI, GUO LILI, SUN YAOTING, SHAN TIZHEN, ZHAO YUEHAN, XIN YE, LI HUI, WANG YONGSHI, BI JUNFENG, BAO QIANQIAN, WANG YALIN
• Format: Patent
• Language: English
• Published: 03.02.2016
• Subjects: DETECTING MASSES OR OBJECTS; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The present invention provides a method for distinguishing calcareous mudstone from sandstone. The method includes the steps as follows: S1, establishing an isochronous stratigraphic framework; S2, performing sparse impulse wave impedance inversion on the basis of the isochronous stratigraphic framework establishment so as to acquire a wave impedance data volume with high lateral continuity; S3, performing sensitivity curve optimization and correction; S4, performing variation function analysis by utilizing the optimized sensitivity curve so as to acquire a parameter probabilistic model with high longitudinal resolution. The method for distinguishing calcareous mudstone from sandstone can increase reservoir prediction precision by utilizing macro-view cognition such as geology and well drilling as a guide, utilizing well log curve as a starting point, and utilizing the corresponding reservoir prediction method as a tool.