... ABSTRACT Geothermal resources in low-permeability and medium-to-high temperature reservoirs in sedimentary sequence require hydraulic stimulation. However, hydrothermal fluid migration for geothermal energy use in enhanced geothermal systems (EGS) is dependent on the in-situ flow pathway...

... ABSTRACT A series of hydraulic stimulation experiments were performed in the Bedretto Underground Laboratory for Geosciences and Geoenergies in Switzerland to answer questions about the creation of an engineered geothermal reservoir in crystalline rocks. A 400 m long stimulation borehole...

... efficient results were observed when in combination with another conventional EOR method, where ultrasound boosts the recovery efficiency. INTRODUCTION Current oil well stimulation methods, such as acid stimulation, are in many cases ineffective and might cause additional operational issues...

.... To that end, we use novel equipment that allows drilling, casing, stimulation, and multi-physics monitoring all under in-situ stress and temperature conditions, with multiple oriented wellbores and complex fracture networks connecting them. The laboratory EGS environments are assessed through acoustic...

... geology fracture hydraulic fracturing hydraulic fracture reservoir characterization geologist united states government reservoir geomechanics wolfcamp stimulation middle wolfcamp geometry hydraulic fracture geometry gross natural fracture mechanical stratigraphy image log propagation...

... temperature of 241°C (465°F). Injection tests indicate a minimum horizontal stress gradient of 16.74 kPa/m (0.74 psi/ft) and a permeability of ∼20 micro-Darcies. A three-stage stimulation of the injection well was performed in April 2022. In the first stage, slickwater was pumped into the open hole section...

... and associated with the stimulation. The risk analysis helps evaluate alternative operational procedures, including those that could mitigate negative effects and minimize the risk from induced seismicity. INTRODUCTION As part of the development of Induced Seismicity Mitigation Plans (ISMPs) for four...

... advancements. INTRODUCTION The concept of fracture caging was initially focused on containing the growth of hydraulic fractures by placing boundary wells around an injection well prior to high-pressure high-rate hydraulic stimulation (Frash et al., 2018). In addition, it appears to be possible...

... been used as a qualitative measure for assessing hydraulic fracture geometry during the stimulation process in unconventional plays (Maxwell et al. 2010; Grechka and Heigl 2017). It is an effective tool in outlining the stimulated reservoir volume (SRV) to estimate fracture height, length, complexity...

... In traditional hydraulic fracturing stimulation, the effective conductivity of low permeability rock is increased by generating or activating fractures through injection of pressurized fluid. Methods that use dynamic loading from explosives and propellants potentially extend stimulation to previously unrealized...

... ABSTRACT: Multi-stage stimulation concepts are considered the most promising approach for a breakthrough in EGS technology. Multi-stage stimulation enables a reduction of seismic risks and an increase of circulation flow rates through the reservoir and thus an increase of energy production...

... ABSTRACT: Enhanced Geothermal System (EGS) design optimization requires simultaneous evaluation of well placement, well stimulation, flow rates, pumping pressures, seismic stability, and power production. Furthermore, it is crucial to consider subsurface uncertainty to evaluate the probability...

... ABSTRACT: Stimulation techniques are performed to improve the well productivity in fields where a large number of wells is present. However, the selection of candidate wells for stimulation treatments, in particular acidizing and hydraulic fracturing, is a challenging task. The conventional...

... ABSTRACT: A series of hydraulic stimulation treatments were performed in the Bedretto Underground Lab for Geosciences and Geoenergies (BULGG) between 2020 and 2021. The objective of this experiment was to prove that multi-stage stimulation is a suitable technology to improve the reservoir...

... and the second for production. During the initial stimulation of well 16A(78)-32, the injection well at the Utah Frontier Observatory for Research in Geothermal Energy, an array of three downhole, high-temperature, eight-level digital receiver strings will be deployed to monitor the fracture system. The well has...

... the oil and gas prices are low. The shock wave (pulsed loading) stimulation is a potential complement to traditional stimulation (e.g., hydraulic fracturing), that can add additional permeability enhancement to rock (via dynamic fracture processes) and bypass the skin region. The shock wave technique...

..., the travel time to the mudline prolongs, resulting in the demand for extended crosslink delay times. Therefore, fracturing fluids that provide flexibility in density, lower friction and extended crosslink times are required for effective stimulation in ultra-deep reservoirs. This paper presents details...

... the Hydraulic Fracture Test Site-1 to simulate hydraulic fracture growth in different landing zones along the length of horizontal wells. We found that strata with lower stress allow for significant lateral growth while strata with higher stress act as barriers to vertical growth. When stimulation occurred...

... for stimulation and geophysical monitoring boreholes. During a hydraulic stimulation injection in winter 2020 into injection borehole ST2 interval ranging from 313 to 320 m, we observe a thermal perturbation using distributed fiber optic temperature sensing in a neighboring open borehole (MB1) at a depth of 275 m...

... ABSTRACT: The EGS Collab project, supported by the US Department of Energy, is performing intensively monitored rock stimulation and flow tests at the 10-m scale in an underground research laboratory to address challenges in implementing enhanced geothermal systems (EGS). Data and observations...