Method for geosteering based on while-drilling parameters

• Main Authors: GAO YANG, LIU WEI, LIU QIANG, ZHAO JINQIAN, ZHANG ZHANRONG, WANG YAFEI, LI DONGLI, LYU JUNLEI, LI PENGCHENG, LI WEI, LI SHILIANG, MAO ZEYU, LIU HUAJI, YUE JIANGANG
• Format: Patent
• Language: Chinese; English
• Published: 28.03.2023
• Subjects: EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MINING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS

The invention provides a method for geosteering based on while-drilling parameters, which comprises the following steps: S10: based on a drilling process, acquiring drilling parameters; s20, acquiring key parameters of the rock-soil body based on field lithology logging and physical and mechanical tests; s30, the drilling parameters are preprocessed, abnormal data are removed, and the mapping relation between the drilling parameters and the drilling hole depth is established; s40, on the basis of correlation analysis, correlation between the drilling parameters is obtained so as to establish the mapping relation between the drilling parameters and the formation lithology; and S50, establishing a model based on the mapping relation among the drilling parameters, the drilling hole depth and the stratum lithology and a grey correlation algorithm, and carrying out lithology judgment of real-time drilling. According to the method, the drilling parameters and the rock-soil body parameters in the pre-drilling proces