- Home
- Conferences
- Conference Proceedings
- Conferences
1st Geoscience & Engineering in Energy Transition Conference
- Conference date: November 16-18, 2020
- Location: Strasbourg, France
- Published: 16 November 2020
61 - 64 of 64 results
-
-
Evaluation of Potential Applicability of Depleted Gas-Condensate Fields for CO2 Sequestration and EOR: Synthetic Case Study
Authors O. Burachok, M.L. Nistor, G. Sosio, O. Kondrat and S. MatkivskyiSummaryTraditionally, deep saline aquifers are considered and evaluated for long term geological storage of CO2 due to relatively high CO2 solubility in water. In the oil industry, also, CO2 is used is as one of the injection agents to displace oil and enhance its recovery. The utilization of depleted gas fields for CO2 storage, however, is considered to be a more expensive option compared to oil field, since the enhanced recovery of gas with CO2 is not effective. For this reason, our study considers the potential use of CO2 EOR (enhanced oil recovery) in depleted gascondensate fields.
This potential is evaluated by performing numerical simulations for typical-size gas-condensate reservoirs with and without active aquifers, in order to estimate both storage efficiency and additional oil recovery from condensed C5+ hydrocarbon fractions, that otherwise will be never recovered and lost in the reservoir. Obtained results indicate significant potential for CO2 storage and additional condensate recovery from the typical gas-condensate field of Eastern Ukraine.
-
-
-
Natural Gas Storage - Viability as Hydratesb
By D. PandeySummaryGas Hydrates or Clathrate Hydrates are crystalline solids, its unit cell consists of a gas molecule (Methane in context of Natural Gases) surrounded by water molecules and the crystalline structure is stabilized by the presence of gas molecule within the cage of water molecules around it. Experiments have proved that Methane Hydrates remained stable and did not decompose when stored at temperatures in the range of -15°C to -5°C, at atmospheric pressure whereas LNG needs to be stored at -162°C. Also, one litre of fully saturated Methane Clathrate contains around 169 litres of methane gas at 0°C and 1 atm, thus requires less volume for storage. In laboratories Methane Clathrates have been successfully produced in stirred vessels at pressure from 2 to 6 MPa and temperatures ranging from 0 to 20°C, thus making it feasible for conversion of Natural Gas into Hydrates and storing them, which can be later used during peak demands. Better stability and reduction of storage cost makes Clathrate Hydrates a compelling alternative to LNG and operating costs can be reduced. This technical paper aims to provide an insight into LNG alternative Hydrates and its feasibility.
-
-
-
Characterization of the Basement/Cover Unconformity Based on Saint Pierre Bois Quarry Observations (Rhine Graben, France)
Authors C. Dezayes, C. Lerouge and P. LachSummaryAccording to the literature, deep geothermal energy reserves are associated with naturally fractured/faulted reservoirs in various geological contexts. In the Upper Rhine graben, several deep geothermal plant exploit the transition zone between crystalline basement and sedimentary cover as a reservoir for heat and power. However, the complexity of this zone makes characterization of its heterogeneities a great challenge to the development of geothermal resources.
At the Saint Pierre Bois quarry, on the western graben border, the granitic crystalline basement is overlain by arkoses. Fracture orientation measurements and rock sampling were conducted on all accessible quarry benches, providing rich datasets for both the granite and the arkose.
The fracture dataset in granite can be interpreted as a large evolved Riedel N80°E fault zone. The core zone is the most highly weathered-fractured zone in the quarry. The two major fracture sets (E-W and N30°E) identified in the damage zone represent shear fracture in the R-direction and P’ fracture, respectively. The E-W structures were the pathways of deep hot fluid circulation at the cover/basement transition. Most of the smallest cataclastic structures associated with this stage are sealed, whereas the highest porosities are present at the margins of large breccia corridors.
-
-
-
Insitu Hydrogen Production from Hydrocarbon Reservoirs - What Are the Key Challenges and Prospects?
Authors P. Ikpeka, J. Ugwu, P. Russell and G. PillaiSummaryIn-situ production of hydrogen from hydrocarbon reservoirs presents an innovative and cost-effective solution to produce hydrogen from fossil fuel sources. It involves the injection of oxygen-enriched air into the reservoir to initiate combustion within the reservoir. As the temperature of the reservoir increases above 500 - 700oC, thermochemical reactions take place to produce hydrogen: aquathermolysis, thermal cracking, water-gas shift reaction, and coke gasification. In this study, the strength, weaknesses, opportunities, and threats to this technology are discussed. The weaknesses identified presents important research direction for this technology.
-