Abstract This study introduces an AI-integrated geology-engineering workflow for efficiently and accurately determining the ratio of effective fractures to hydraulic in unconventional reservoirs. The combines a boundary element-based fracture simulator with GPU-accelerated reservoir using Embedded Discrete Fracture Model (EDFM). Geological geomechanical complexities, including natural stress heterogeneity, are incorporated precise modeling. was applied shale gas pad Longmaxi formation...

Abastract The technological lag in the development of upper shale gas low-permeability reservoirs southern Sichuan has impeded advancement exploration and resulted inefficient utilisation resources. findings this study can serve as a foundation for efficient techniques production deep Sichuan. This presents reservoir fracturing model unconventional reservoirs, which is based on extended finite elements XGBoost artificial intelligence algorithm. capable fulfilling requirements geological...

The generation method of three-dimensional fractal discrete fracture network (FDFN) based on multiplicative cascade process was developed. complex multi-scale system in shale after fracturing characterized by coupling the artificial model and natural model. Based an assisted history matching (AHM) using multiple-proxy-based Markov chain Monte Carlo algorithm (MCMC), embedded modeling (EDFM) incorporated with reservoir simulator used to predict productivity gas well. When method, distribution...

Abstract During the unconventional reservoir development, a proper modelling of underground fracture networks and their effects on production is crucial for development potential realistic economic analysis. Conventionally, complex system formed by hydraulic natural fractures extremely difficult to capture, let alone numerically simulate it. Most importantly, current best solution can only rely knowledge from geology geophysics team engineering team. Nevertheless, this fails realize dynamic...

Understanding subsurface natural fracture systems is crucial to characterize well production dynamics and long-term productivity potential. In addition, the placement of future wells can benefit from in-depth network connectivity investigations, vastly improving new wells’ profitability life cycles if they are placed in dense, well-connected zones. this study, a novel calibration workflow proposed. This starts with extraction sector geology model pre-built full-field model. Then, cross...

Abstract Optimum well spacing is an essential element for the economic development of shale gas reservoirs. We present integrated assisted history matching (AHM) and embedded discrete fracture model (EDFM) workflow optimization by considering multiple uncertainty realizations analysis. This applied in reservoirs Sichuan Basin China. First, we AHM to calibrate ten matrices uncertain parameters using a real well, including matrix permeability, porosity, three relative permeability parameters,...

ABSTRACT Due to highly uncertain nature of unconventional reservoirs and difficult monitoring the engineering effectiveness, a reliable, accurate, efficient reservoir model calibration workflow is essential help operators understand/plan their assets. In this paper, collection non-intrusive EDFM (Embedded Discrete Fracture Model), AI (artificial intelligence), an unconventional-targeting in-house simulator URSim built perform automatic history matching uncertainty hydraulic natural fractures...

Abstract Shale field developmentfinds significant challenges when operators have to define optimal spacing of infill wells and further fracture optimization, based on biased understanding the physical phenomena behind fluid flow in complex unconventional reservoir systems. Although proper modeling has been employed other studiesto address detrimental impact well interference, this study poses how these hits can be beneficial after estimating their impacts hydrocarbon cumulative recoveries....

Abstract This study presents a new workflow by integrating robust 3D hydraulic fracture propagation model in conjunction with reservoir simulation through the embedded discrete (EDFM). Specifically, is applied to simulate more realistic geometry considering geomodel rescue format and natural fractures. Multiple wells varying well spacing are considered. After simulation, predicted fractures, activated non-activated fractures easily transferred simulator. The EDFM method can accurately...

Abstract Microseismic technology has proven its efficiency to monitor hydraulic fracturing effectiveness. The objective of this study is develop a novel method calibrate and generate the fracture cluster-based model multi-stage horizontal shale well using microseismic data. We use microcosmic numerical known as EDFM software feature (MSE-Frac) with embedded discrete simulate natural fractures network. MSE-Frac can handle grouping clustered events around wellbore complex Afterwards, we apply...

At present, investigation of the effects natural fractures on optimal well spacing shale gas reservoirs from an economic perspective has been lacking. Traditional frameworks fracture characterization, such as local grid refinement, make it unfeasible and inaccurate to study these high-density with complex geometries spacing. In this study, non-intrusive EDFM (embedded discrete model) method was presented characterize fast accurately. The non-intrusiveness removed necessity accessing codes...

In order to account for big uncertainties such as well interferences, hydraulic and natural fractures’ properties matrix in shale gas reservoirs, it is paramount develop a robust efficient approach spacing optimization. this study, novel optimization workflow proposed applied real reservoir with two-phase flow, incorporating the systematic analysis of uncertainty fracture parameters. One hundred combinations these uncertainties, considering their interactions, were gathered from assisted...

Abstract A robust and reliable workflow for well spacing optimization in shale reservoirs development incorporating various types of uncertainties detailed economics analysis is paramount to achieve a sustainable unconventional production. In this study, we show novel based on the results assisted history matching apply it real gas well, uncertainty parameters such as matrix permeability, porosity, fracture half-length, height, width, conductivity water saturation. The input ranges these are...

ABSTRACT Choke management and important aspect of an oil or gas well production life cycle. Effective understanding modelling choke usually revolves around different paths bottomhole drawdown. Limited numerical study within fractured reservoirs has been dedicated. In this paper, examinations effects on a shale performance is conducted, with the help embedded discrete fracture model (EDFM). A realistic geological setting also incorporated by simulation corner point structural complex 3D...

ABSTRACT Due to the highly uncertain nature of unconventional reservoirs and difficult monitoring engineering effectiveness, a reliable, accurate, efficient fracture propagation model is essential help operators understand/plan their assets. The modeling sensitivity study comprehensive investigation key factors that influence behavior hydraulic fractures in subsurface rock formations. This utilizes advanced numerical simulation techniques various geomechanics conditions evaluates changes...

Abstract Integrated modelling of refracturing is a comprehensive and complex task for engineers involved in field development, especially previously developed mature fields. The process requires consideration numerous factors to accurately predict fracture propagation patterns during production. During the initial fracturing process, hydraulic fractures generate an altered induced stress field. Later, post-fracturing production hydrocarbon extraction causes formation pore pressure depletion,...

Abstract This study presents a comprehensive methodology for evaluating the performance and economic viability of two shale gas wells in Sichuan Basin, Southwest China. A hydraulic fracture simulator was utilized to model propagation, incorporating 3D geomechanics natural fractures. The calibrated using real pumping pressure data, geometry integrated into reservoir Embedded Discrete Fracture Model (EDFM) method history matching with field production data. introduces new calculate drainage...

ABSTRACT: Casing deformation in shale gas wells is a significant challenge that compromises wellbore integrity and reduces production efficiency, particularly complex geological settings such as the Sichuan Basin, China. This study focuses on mitigating casing risks typical pad consisting of four horizontal wells. A detailed geomechanical analysis was conducted, examining stress distribution rock brittleness. natural fracture model developed, identifying groups fractures with lateral scales...