Aiming at the challenges faced by ultra-deep wells in the southern margin of the Junggar Basin, such as strong uncertainty in formation information, difficulties in accurate prediction of three formation pressures, narrow safe density windows, and prominent downhole risks, this paper establishes a method for predicting three formation pressures with confidence levels and quantitatively evaluating drilling risks based on well–seismic fused data. Firstly, rock mechanics and in situ stress calculation models are optimized to characterize the strong uncertainty of deep formations. Then, high-precision well–seismic fused interval velocity is generated through multi-source data preprocessing, well–seismic data fusion, and construction of the MLP-TFT-MCMC hybrid model. On this basis, three formation pressures are calculated, and a pressure profile with confidence levels is constructed using an improved t-distribution. Verified by a field well case, the predicted results are consistent with actual data, providing technical support for the safe and efficient drilling of subsequent ultra-deep wells.
Deep coalbed methane (CBM) is rich in resources and is an important replacement resource for tight gas in China. Accurate prediction of post-fracture production and dynamic change characteristics of fractured wells of partial CBM is of great significance in predicting the final r…
Flood disasters are a natural occurrence around the world, resulting in numerous casualties. It is vital to develop an accurate flood forecasting and prediction model in order to curb damages and limit the number of victims. Water resource allocation, management, planning, flood…
In this study, deep tight sandstone was selected as an example to propose a complete method for predicting reservoir pore structure by capillary pressure curves and conventional well log data. This method pioneers the integration of grey relational analysis, principal component a…
With the continued advancement of shale gas development, the issue of frac hit has become increasingly prominent and has emerged as a key factor influencing the production of shale gas wells. Quantitative evaluation of the impact of frac hit on shale gas wells and proposing diffe…
The yield assessment process during maize harvesting is a necessary means to ensure farmers’ economic benefits and stable agricultural production. Predicting the mass of maize kernels is an important condition for yield detection. This study proposes a maize kernel mass predictio…
Ultra-deep fault-controlled carbonate reservoirs exhibit strong heterogeneity, multi-scale fracture–cavity systems, and complex geological controls, which render conventional analytical well testing methods inadequate. This study proposes a geological model-based numerical well t…