Abstract:

Problems including insufficient quantity and low resolution of data face exploration and development of deep and complex reservoir targets， and the traditional geological modeling methods have been inadequate in terms of technical needs. The intelligent geological modeling represented by deep learning capable of fully integrating multi-scale and multi-dimensional data as well as expert knowledge， is a key research and development direction of geological modeling technology. The study discusses the deep learning-based geological modeling driven by sedimentary process simulation following the comprehensive analysis of the advantages and disadvantages of stratigraphic forward modeling and deep learning-based geological modeling technology. First， forward modeling of sedimentation is carried out based on comprehensive geological analysis， parameter uncertainty is analyzed， and a large amount of geological models are established through parameter disturbance as a training dataset； Second， the geological patterns contained in the learning dataset are learned with the conditional Generative Adversarial Nets （cGAN）， in which the Generative Adversarial Networks （GAN） takes the conditional data such as well and seismic data as the input， and the geological model as the output； Finally， the trained GAN is applied to the real conditional data to obtain the geological model of the target block. The feasibility of this method is verified through testing on the typical geological profiles of the main block of Puguang gas reservoir， and the impact of the training dataset scale on simulation results is analyzed. The combination of sedimentary simulation and deep learning could make up for the shortage of training data and indirectly realize knowledge-driven deep learning-based geological modeling. The method is therefore of great significance to popularization.

Key words: artificial intelligence （AI）, big data, knowledge-driven, Generative Adversarial Networks （GAN）, sedimentary process simulation, deep learning-based geological modeling, Puguang gas reservoir, Sichuan Basin