Method for quickly dividing lithofacies and drawing lithofacies distribution diagram

• Main Authors: WANG YING, YANG LIANG, SONG LEI, HE JUNLING, SHEN HUA, JIANG TAO, WANG FENG, ZHANG YONGQING, XING JILIN, XUE WEI
• Format: Patent
• Language: Chinese; English
• Published: 31.05.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; ELECTRIC DIGITAL DATA PROCESSING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PHYSICS

The invention discloses a method for quickly dividing lithofacies and drawing a lithofacies distribution diagram. The method comprises the following steps: preparing a necessary well logging columnar map; establishing a TOC prediction model and a brittle mineral content calculation model based on the logging curve; carrying out single well TOC and brittle mineral content estimation based on a logging curve, and verifying, modifying and perfecting measured data; on the basis of single well TOC and brittle mineral content estimation, the fine-grained sedimentary rock is mainly based on TOC-mineral, and proper ranges and types are selected and lithofacies types are divided according to the actual situation of a research area; and making a plane graph according to the predicted TOC and brittle mineral content, and further drawing a lithofacies plane distribution graph according to each lithofacies identification parameter by combining a TOC and brittle mineral content distribution graph and a single well lithofac