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In this installment of Get To Know: Women In Energy, we are joined by Veronica Henrichsen, Assistant Driller at Odfjell Technology. In this episode, Veronica shares her insights working as an assistant driller, and reflects on how her childhood in Norway contributed to her love of the offshore lifestyle.
Optimization of producing oil and gas wells has always been important for managing operating expenses and continues to be an important part of production management. Production surveillance and inflow and outflow flow assurance remain key technology areas. As our industry increasingly focuses on the climate impacts of our operations, there is a growing emphasis on optimizing emissions from our operations and on the usage of water. New areas of energy development such as carbon capture and storage, geothermal energy, and subsurface energy storage are built upon skills developed from years of oil and gas production. Digitalization has become an integral part of our ways of working.
- Europe > Serbia (0.60)
- Asia > Azerbaijan (0.60)
- Africa > Ghana (0.60)
- (3 more...)
The energy business is progressively transforming to solve the energy trilemma. The world indeed needs an energy mix that offers a mix of secure and reliable energies, affordable and available energies, and reduced greenhouse emissions. The transition from a 100% carbon-based industry to a more equilibrated and sustainable mix is a long transformational road. Three major levers can be activated though, to facilitate such transformational challenge. Join this SPE Live moderated by Pierre-Emmanuel d'Huart, and our guests David Whitehouse, Kirsten Pasturel, and JinHan Lim, ahead of the 50th Birthday edition of SPE Offshore Europe, as they share their expert perspective on how digital initiatives, robust geo-engineering skills, and innovative investment policies are essential to the energy transition.
Rock-physics model of a gas hydrate reservoir with mixed occurrence states
Wu, Cun-Zhi (China University of Petroleum (Beijing)) | Zhang, Feng (China University of Petroleum (Beijing)) | Ding, Pin-Bo (China University of Petroleum (Beijing)) | Sun, Peng-Yuan (CNPC, National Engineering Research Center for Oil and Gas Exploration Computer Software) | Cai, Zhi-Guang (CNPC, National Engineering Research Center for Oil and Gas Exploration Computer Software) | Di, Bang-Rang (China University of Petroleum (Beijing))
ABSTRACT Seismic interpretation of gas hydrates requires the assistance of rock physics. Changes in gas hydrate saturation can alter the elastic properties of formations, and this relationship can be considerably influenced by the occurrence state of gas hydrates. Pore-filling, load-bearing, and cementing types are three single gas hydrate occurrence states commonly considered in rock-physics investigations. However, many gas hydrate-bearing formations are observed to have mixed occurrence states, and their rock-physics properties do not fully conform to models of single occurrence states. We develop a generalized rock-physics model for gas hydrate-bearing formations with three mixed occurrence states observed in the field or laboratory experiments: coexisting pore-filling-type and matrix-forming-type gas hydrates (case 1); pore-filling type when (gas hydrate saturation) < (critical saturation) and pore-filling + matrix-forming type when (case 2); and matrix-forming type when and matrix-forming + pore-filling type when (case 3). Instead of initial porosity, the apparent porosity (the volume fraction of an effective pore filler) represents the influence of occurrence states on the pore space. These three mixed occurrence states can be modeled using a unified workflow, in which the volume fractions of various gas hydrate types are expressed in general forms in terms of the apparent porosity. In addition, the model considers the effect of a pore filler on shear modulus. The developed model is validated through calibration with real well-log data and published experimental data corresponding to five gas hydrate-bearing formations. The model effectively interprets the influences of gas hydrate saturation and occurrence state on these formations. Thus, the generalized model provides a theoretical basis for the analysis of sensitive elastic parameters and quantitative interpretation for gas hydrate reservoirs.
- North America > United States (0.46)
- Asia > China (0.29)
- Asia > Middle East > Israel > Mediterranean Sea (0.24)
- Europe > Norway > Norwegian Sea (0.24)
ABSTRACT Gassmann’s equations have been known for several decades and are widely used in geophysics. These equations are treated as exact if all the assumptions used in their derivation are fulfilled. However, a recent theoretical study claimed that Gassmann’s equations contain an error. Shortly after that, a 3D numerical calculation was performed on a simple pore geometry that verifies the validity of Gassmann’s equations. This pore geometry was simpler than those in real rocks but arbitrary. Furthermore, the pore geometry that was used did not contain any special features (among all possible geometries) that were tailored to make it consistent with Gassmann’s equations. In other recent studies, I also performed numerical calculations on several other more complex pore geometries that supported the validity of Gassmann’s equations. To further support the validity of these equations, I provide here one more convergence study using a more realistic geometry of the pore space. Given that there are several studies that rederive Gassmann’s equations using different methods and numerical studies that verify them for different pore geometries, it can be concluded that Gassmann’s equations can be used in geophysics without concern if their assumptions are fulfilled. MATLAB routines to reproduce the presented results are provided.
- North America > United States > Massachusetts (0.29)
- Europe (0.29)
Seventeen companies have been offered a total of 24 licenses in the second round of the North Sea Transition Authority's (NSTA) 33rd oil and gas licensing round. Of the 17 companies, several supermajors including Equinor, BP, Shell, and TotalEnergies secured licenses for 74 blocks and part-blocks in the Central North Sea, Northern North Sea, and West of Shetland areas. Remaining blocks in the Southern North Sea and East Irish Sea will be offered when environmental evaluations are finalized by the UK Offshore Petroleum Regulator for Environment and Decommissioning. These awards follow the 27 licenses offered in the first allocation made in October 2023 which consisted of 931 blocks and part-blocks available in the same locations. The application window closed in January 2023 with 115 bids coming in from 76 companies.
- Europe > North Sea (1.00)
- Europe > United Kingdom > North Sea (0.93)
- Europe > Norway > North Sea (0.93)
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- Africa > Namibia > South Atlantic Ocean > Orange Basin (0.99)
- Africa > Nigeria > Gulf of Guinea > Niger Delta > Niger Delta Basin > OML 130 (0.98)
- Africa > Angola > South Atlantic Ocean > Lower Congo Basin > PSVM Development Area > Block 31 > Venus Field > Venus Well (0.98)
- (13 more...)
Distributed fiber-optic sensing (DFOS) allowed the continuous gathering of flow-profile information from a high-temperature, high-rate gas well. The objective of the case study described in the complete paper is to demonstrate that thermal inversion modeling can be used to produce a production-flow profile in an environment where conventional production logging is not possible. As a result of deploying DFOS, data can be acquired at more-realistic rates. Through performing of thermal inversion of distributed temperature sensing (DTS) data and analysis of distributed acoustic sensing (DAS) data, a more-accurate flow profile was achieved.
The Nova field is in the northeastern North Sea. Reservoir sands are at depths of 2500–2800 m, with a pressure of approximately 290 bar and temperatures up to 110 C. The field will be operated with six wells--three oil producers and three water injectors--with an injector/producer pair in each of the main fault compartments.
- Europe > Norway > North Sea > Northern North Sea > North Viking Graben > PL 418 > Block 35/9 > Nova Field > Viking Formation > Heather Formation (0.99)
- Europe > Norway > North Sea > Northern North Sea > North Viking Graben > PL 418 > Block 35/9 > Nova Field > Rannoch Formation > Heather Formation (0.99)
- Europe > Norway > North Sea > Northern North Sea > North Viking Graben > PL 418 > Block 35/8 > Nova Field > Viking Formation > Heather Formation (0.99)
- (3 more...)