Research on Reservoir Prediction Methods for Complex Fault-Block Reservoir Based on Global Optimization of High-Density Sequence Stratigraphic Model

The Hailar Basin is a typical terrestrial faulted lake basin that has undergone multiple periods of tectonic evolution, with complex geological conditions and sedimentary characteristics of multiple directions and short processes. Horizontally, the lithology changes rapidly, and the reservoir heterogeneity is strong. There is a significant error between the inversion results and the actual drilling situation, which makes it difficult to meet the requirements of well location deployment in complex fault block oil fields. The traditional inversion method uses simple linear interpolation to establish a three-dimensional low-frequency model. When modeling, the model has fewer control layers and is affected by the timing of stratigraphic penetration. The internal sequence changes are not obvious, and the geological structural characteristics are not clear. The inversion results have a low recognition rate for thin sandstone layers. To increase the number of control layers, manual or local tracking methods need to be used for interpretation and tracking, and human intervention requires a huge amount of work. This study started with the sequence stratigraphy model, constructed a grid panel model, considered the isochronicity of layer information, and based on the principle of minimizing the cost function, established a globally optimized high-density sequence stratigraphy model through human-computer interaction intelligent interpretation and continuous iteration, effectively improving inversion resolution and accuracy. This model has shown significant effectiveness in predicting thin sandstone reservoirs, providing strong technical support for sweet spot prediction in complex fault block reservoirs in Hailar. The abstract should summarize the contents of the paper in short terms containing 235–450 words. This document explains and demonstrates how to prepare your camera-ready manuscript for IFEDC 2020. The best is to read these instructions and follow the outline of this text. The text area for your manuscript must be 17 cm wide and 25 cm high (6.7 and 9.8 inches, resp.). Do not place any text outside this area. Use good quality, white paper of approximately 21 × 29 cm or 8 × 11 inches (please do not change the document setting from A4 to letter).