Application Prospects in China of Oil Shale In Situ Mining Method and an Improved Method

2014 ◽  
Vol 535 ◽  
pp. 602-605 ◽  
Author(s):  
Gui Jie Zhao ◽  
Chen Chen ◽  
Fang Qian
Keyword(s):  
Alternative Energy ◽  
Oil Shale ◽  
Oil And Gas ◽  
Outlet Channel ◽  
Heat Efficiency ◽  
Initial Stage ◽  
New Energy ◽  
Development And Utilization ◽  
Mining Methods

Oil shale resources is a new energy has a huge potential for development, as the complement and alternative energy of the oil and gas, more and more people pay attention to it. China's oil shale resources are widely distributed and reserves are huge, but current mining methods are still primitive, mainly to direct exploitation, exploitation efficiency is low and ecological damage is serious, it will be replaced by in-situ mining methods in the future. This paper summarizes the research of oil shale in situ mining, aims at the problems of that the conduction of heat efficiency is low and the outlet channel is less which exist in the in-situ mining at the present, and put forward the concept of in-situ broken that is using some methods to make the oil shale change from huge to small block in the initial stage of the in-situmining, further in-situ heating, mining of oil shale，and put forward the method of in-situ noncontact wind breaking oil shale, this method using the crushing wind to break the oil shale, having high feasibility. This paper did in-depth research on the in-situ mining, and it can provide a reference for the development and utilization of oil shale resources.

scholarly journals Release characteristics of Pb and BETX from in situ oil shale transformation on groundwater environment

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Han Wang ◽  
Wenjing Zhang ◽  
Shuwei Qiu ◽  
Xiujuan Liang
Keyword(s):  
Alternative Energy ◽  
Oil Shale ◽  
Oil And Gas ◽  
Ex Situ ◽  
Rock Interaction ◽  
Groundwater Environment ◽  
Benzene Series ◽  
Over Time ◽  
Water Rock Interaction

AbstractOil shale has received attention as an alternative energy source to petroleum because of its abundant reserves. Exploitation of oil shale can be divided into two types: ex situ and in situ exploitation. In situ transformation has been favoured because of its various advantages. Heating of oil shale leads to the production of oil and gas. To explore the influence of solid residue after pyrolysis of oil shale on the groundwater environment, we performed ultrapure water–rock interaction experiments. The results showed that Pb tended to accumulate in solid residues during pyrolysis. Additionally, the Pb concentration goes up in the immersion solution over time and as the pyrolysis temperature increased. In contrast, when we measured the soaking data of benzene series, the concentrations of benzene and toluene produced at temperatures over 350 ℃ were highest in the four oil shale pyrolysis samples after pyrolysis. The water–rock interaction experiment for 30 days led to benzene and toluene concentrations that were 104 and 1070-fold over the limit of China’s standards for groundwater quality. Over time, the content of benzene series was attenuated via biological actions. The results show that in situ oil shale mining can lead to continuous pollution in the groundwater environment.

scholarly journals Cyclic Subcritical Water Injection into Bazhenov Oil Shale: Geochemical and Petrophysical Properties Evolution Due to Hydrothermal Exposure

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4570
Author(s):  
Aman Turakhanov ◽  
Albina Tsyshkova ◽  
Elena Mukhina ◽  
Evgeny Popov ◽  
Darya Kalacheva ◽  
...  
Keyword(s):  
Energy Demand ◽  
Oil Shale ◽  
Oil And Gas ◽  
Subcritical Water ◽  
Pore Space ◽  
Water Injection ◽  
Microstructural Properties ◽  
Gas Generation ◽  
Geochemical Parameters

In situ shale or kerogen oil production is a promising approach to developing vast oil shale resources and increasing world energy demand. In this study, cyclic subcritical water injection in oil shale was investigated in laboratory conditions as a method for in situ oil shale retorting. Fifteen non-extracted oil shale samples from Bazhenov Formation in Russia (98 °C and 23.5 MPa reservoir conditions) were hydrothermally treated at 350 °C and in a 25 MPa semi-open system during 50 h in the cyclic regime. The influence of the artificial maturation on geochemical parameters, elastic and microstructural properties was studied. Rock-Eval pyrolysis of non-extracted and extracted oil shale samples before and after hydrothermal exposure and SARA analysis were employed to analyze bitumen and kerogen transformation to mobile hydrocarbons and immobile char. X-ray computed microtomography (XMT) was performed to characterize the microstructural properties of pore space. The results demonstrated significant porosity, specific pore surface area increase, and the appearance of microfractures in organic-rich layers. Acoustic measurements were carried out to estimate the alteration of elastic properties due to hydrothermal treatment. Both Young’s modulus and Poisson’s ratio decreased due to kerogen transformation to heavy oil and bitumen, which remain trapped before further oil and gas generation, and expulsion occurs. Ultimately, a developed kinetic model was applied to match kerogen and bitumen transformation with liquid and gas hydrocarbons production. The nonlinear least-squares optimization problem was solved during the integration of the system of differential equations to match produced hydrocarbons with pyrolysis derived kerogen and bitumen decomposition.

New Energy Development and Utilization of the China National Offshore Oil Corporation

2011 ◽  
Vol 347-353 ◽  
pp. 1172-1179
Author(s):  
Nan Jun Lai
Keyword(s):  
Development Strategy ◽  
Global Economy ◽  
Oil And Gas ◽  
Oil Prices ◽  
Energy Development ◽  
Oil And Gas Producers ◽  
New Energy ◽  
Fast Development ◽  
Development And Utilization ◽  
Offshore Oil

Oil belongs to nonrenewable resources. With the oil supply relatively limited and the global economy enters a fast development cycle and oil demand is increasing, oil prices rising is inevitable. Impact of high oil prices is deep and continuous, will change our country’s energy production and consumption structure. As China’s largest offshore oil and gas producers, China’s CNOOC must take positive and correct development strategy, and energetically develop and use of in the new energy, and provide high quality energy for our country’s economic and social development. This paper expounds some effort in the field of new energy development and utilization of the China National Offshore Oil Corporation(CNOOC), mainly including wind power development, bio-fuels development, natural gas hydrate recover and so on.

scholarly journals Thermodynamic mechanism evaluate the feasibility of oil shale pyrolysis by topochemical heat

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shuai Zhao ◽  
Xiaoshu Lü ◽  
Youhong Sun ◽  
Jiandong Huang
Keyword(s):  
Transition State ◽  
Oil Shale ◽  
Oil And Gas ◽  
Early Stage ◽  
Oil Production ◽  
Pilot Project ◽  
Main Stage ◽  
Oil Shale Pyrolysis ◽  
Heat Method

AbstractTopochemical heat in-situ pyrolysis of oil shale is achieved by injecting high temperature nitrogen to promote oil shale pyrolysis and release heat, and then injecting air to trigger oil shale combustion in the early stage of oil shale pyrolysis, and then by injecting normal temperature air continuously to promote local oxidation of oil shale in the later stage. In order to verify the oil and gas recovery by topochemical heat method, Jilin University has chosen Fuyu City, Jilin Province, to carry out pilot project of oil shale in-situ pyrolysis by topochemical heat method. Besides, in order to infer the spontaneity, feasibility and difficulty of continuous pyrolysis of oil shale based on topochemical heat, this paper, the mechanism of solid-state pyrolysis and the thermodynamic analysis of transition state of oil shale in Fuyu area are discussed. Because the second stage of oil shale pyrolysis is the main stage of oil production. Therefore, the characteristics of Gibbs free energy, free enthalpy and free entropy of transition state in the main oil production stage of oil shale pyrolysis are obtained by calculation. The results show that in situ pyrolysis of oil shale topochemical heat can be carried out spontaneously and continuously, and the release characteristics of volatiles during pyrolysis of oil shale are described.

scholarly journals ECONOMIC SECURITY OF THE RUSSIAN OIL AND GAS INDUSTY IN THE CONDITIONS OF ENERGY TRANSITION

2021 ◽  
Vol 3 (26) ◽  
pp. 55-61
Author(s):  
V.A. Plotnikov ◽  
◽  
V.I. Babenkov ◽  
Keyword(s):  
Alternative Energy ◽  
Oil And Gas ◽  
Energy Transition ◽  
Oil And Gas Industry ◽  
Economic Security ◽  
Gas Industry ◽  
Transition Level ◽  
New Energy

The paper describes threats that the Russian oil and gas industry faces due to the transition to a new energy paradigm. It is demonstrated that the level of these threats depends on the time of this transition. Level of these threats will be different for oil and gas industries. Recommendations for adaption of the Russian oil and gas industry to the new energy paradigm. It is demonstrated that the development of alternative energy in our country will be auxiliary.

Uncertainty Quantification of an Explicitly Coupled Multiphysics Simulation of In-Situ Pyrolysis by Radio Frequency Heating in Oil Shale

SPE Journal ◽  
2020 ◽  
Vol 25 (03) ◽  
pp. 1443-1461
Author(s):  
Travis Ramsay
Keyword(s):  
Radio Frequency ◽  
Uncertainty Quantification ◽  
Oil Shale ◽  
Oil And Gas ◽  
Polynomial Chaos ◽  
Epistemic Uncertainty ◽  
Rf Heating ◽  
Commercial Development ◽  
Mc Simulation

Summary In-situ pyrolysis provides an enhanced oil recovery (EOR) technique for exploiting oil and gas from oil shale by converting in-place solid kerogen into liquid oil and gas. Radio-frequency (RF) heating of the in-place oil shale has previously been proposed as a method by which the electromagnetic energy gets converted to thermal energy, thereby heating in-situ kerogen so that it converts to oil and gas. In order to numerically model the RF heating of the in-situ oil shale, a novel explicitly coupled thermal, phase field, mechanical, and electromagnetic (TPME) framework is devised using the finite element method in a 2D domain. Contemporaneous efforts in the commercial development of oil shale by in-situ pyrolysis have largely focused on pilot methodologies intended to validate specific corporate or esoteric EOR strategies. This work focuses on addressing efficient epistemic uncertainty quantification (UQ) of select thermal, oil shale distribution, electromagnetic, and mechanical characteristics of oil shale in the RF heating process, comparing a spectral methodology to a Monte Carlo (MC) simulation for validation. Attempts were made to parameterize the stochastic simulation models using the characteristic properties of Green River oil shale. The geologic environment being investigated is devised as a kerogen-poor under- and overburden separated by a layer of heterogeneous yet kerogen-rich oil shale in a target formation. The objective of this work is the quantification of plausible oil shale conversion using TPME simulation under parametric uncertainty; this, while considering a referenced conversion timeline of 1.0 × 107 seconds. Nonintrusive polynomial chaos (NIPC) and MC simulation were used to evaluate complex stochastically driven TPME simulations of RF heating. The least angle regression (LAR) method was specifically used to determine a sparse set of polynomial chaos coefficients leading to the determination of summary statistics that describe the TPME results. Given the existing broad use of MC simulation methods for UQ in the oil and gas industry, the combined LAR and NIPC is suggested to provide a distinguishable performance improvement to UQ compared to MC methods.

Numerical Simulation of the In-Situ Upgrading of Oil Shale

SPE Journal ◽  
2010 ◽  
Vol 15 (02) ◽  
pp. 368-381 ◽  
Author(s):  
Y.. Fan ◽  
L.J.. J. Durlofsky ◽  
H.A.. A. Tchelepi
Keyword(s):  
Chemical Reaction ◽  
Oil Shale ◽  
Oil And Gas ◽  
Energy Resource ◽  
General Purpose ◽  
Gas Production ◽  
Oil And Gas Production ◽  
Design And Optimization ◽  
Compositional Flow

Summary Oil shale is a highly abundant energy resource, though commercial production has yet to be realized. Thermal in-situ upgrading processes for producing hydrocarbons from oil shale have gained attention recently, however, in part because of promising results reported by Shell using its in-situ conversion process (Crawford et al. 2008). This and similar processes entail heating the oil shale to approximately 700°F (371°C), where the kerogen in the shale decomposes through a series of chemical reactions into liquid and gas products. In this paper, we present a detailed numerical formulation of the in-situ upgrading process. Our model, which can be characterized as a thermal/compositional, chemical reaction, and flow formulation, is implemented into Stanford's General Purpose Research Simulator (GPRS). The formulation includes strongly temperature-dependent kinetic reactions, fully compositional flow and transport, and a model for the introduction of heat into the formation through downhole heaters. We present detailed simulation results for representative systems. The model and heating patterns are based on information in Shell publications; chemical-reaction and thermodynamic data are from previously reported pyrolysis experiments. After a relatively modest degree of parameter adjustment (with parameters restricted to physically realistic ranges), our results for oil and gas production are in reasonable agreement with available field data. We also investigate various sensitivities and show how production is affected by heater temperature and location. The ability to model these effects will be essential for the eventual design and optimization of in-situ upgrading operations.

scholarly journals Progress in Catalytic Pyrolysis of Oil Shale

Scanning ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Donghao Li ◽  
Haodan Pan ◽  
Xiaojing Di ◽  
Xiaoyang Liu ◽  
Hongxiang Hu
Keyword(s):  
Alternative Energy ◽  
Oil Shale ◽  
Supported Catalysts ◽  
Metal Compounds ◽  
Factors Affecting ◽  
Pyrolysis Mechanism ◽  
Natural Minerals ◽  
Oil Shale Pyrolysis ◽  
Development And Utilization ◽  
Alternative Energy Resources

This paper briefly describes the research status of oil shale pyrolysis technology and the main factors affecting oil shale pyrolysis, with emphasis on four kinds of commonly used catalysts: The effects of natural minerals, metal compounds, molecular sixes, and supported catalysts on the pyrolysis of oil shale were discussed. The changes of the pyrolysis mechanism and product composition of oil shale with the addition of different catalysts were discussed. Finally, the development direction of preparation of new catalysts was discussed, in order to provide a prospect for the development and utilization of unconventional and strategic alternative energy resources around the world.

scholarly journals Thermodynamic Mechanism Evaluate the Feasibility of Oil Shale Pyrolysis by Topochemical Heat

2020 ◽  
Author(s):  
Zhao Shuai ◽  
LÜ Xiaoshu ◽  
Sun Youhong ◽  
Huang Jiandong
Keyword(s):  
Transition State ◽  
Oil Shale ◽  
Oil And Gas ◽  
Early Stage ◽  
Oil Production ◽  
Pilot Project ◽  
Main Stage ◽  
Oil Shale Pyrolysis ◽  
Heat Method

Abstract Topochemical heat in-situ pyrolysis of oil shale is achieved by injecting high temperature nitrogen to promote oil shale pyrolysis and release heat, and then injecting air to trigger oil shale combustion in the early stage of oil shale pyrolysis, and then by injecting normal temperature air continuously to promote local oxidation of oil shale in the later stage. In order to verify the oil and gas recovery by topochemical heat method, Jilin University has chosen Fuyu City, Jilin Province, to carry out pilot project of oil shale in-situ pyrolysis by topochemical heat method. Besides, in order to infer the spontaneity, feasibility and difficulty of continuous pyrolysis of oil shale based on topochemical heat, this paper, the mechanism of solid-state pyrolysis and the thermodynamic analysis of transition state of oil shale in Fuyu area are discussed. Because the second stage of oil shale pyrolysis is the main stage of oil production. Therefore, the characteristics of Gibbs free energy, free enthalpy and free entropy of transition state in the main oil production stage of oil shale pyrolysis are obtained by calculation. The results show that in situ pyrolysis of oil shale topochemical heat can be carried out spontaneously and continuously, and the release characteristics of volatiles during pyrolysis of oil shale are described.

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