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Petroleum 2022年第2期8卷 278-290页

作者： Ivan Makhotin Denis Orlov Dmitry Koroteev Evgeny Burnaev Aram Karapetyan Dmitry Antonenko Skolkovo Institute of Science and Technology MoscowRussia JSC Zarubezhneft MoscowRussia

Well-known oil recovery factor estimation techniques such as analogy,volumetric calculations,material balance,decline curve analysis,hydrodynamic simulations have certain *** techniques are time-consuming,and require specific data and expert ***,though uncertainty estimation is highly desirable for this problem,the methods above do not include this by *** this work,we present a data-driven technique for oil recovery factor(limited to water flooding)estimation using reservoir parameters and representative *** apply advanced machine learning methods to historical worldwide oilfields datasets(more than 2000 oil reservoirs).The data-driven model might be used as a general tool for rapid and completely objective estimation of the oil recovery *** addition,it includes the ability to work with partial input data and to estimate the prediction interval of the oil recovery *** perform the evaluation in terms of accuracy and prediction intervals coverage for several tree-based machine learning techniques in application to the following two cases:(1)using parameters only related to geometry,geology,transport,storage and fluid properties,(2)using an extended set of parameters including development and production *** both cases,the model proved itself to be robust and *** conclude that the proposed data-driven approach overcomes several limitations of the traditional methods and is suitable for rapid,reliable and objective estimation of oil recovery factor for hydrocarbon reservoir.

关键词： oil recovery factor Machine learning Regression Uncertainty estimation Conformal predictors Clustering oilfield oil reservoir

Stabilized oil production conditions in the development equilibrium of a water-flooding reservoir

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Petroleum 2016年第4期2卷 381-392页

作者： Renshi Nie Ting Ren Yonglu Jia State Key Laboratory of oil&Gas reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu 610500Sichuan ProvincePeople's Republic of China

Water injection can compensate for pressure depletion of *** paper firstly investigated into the equilibrium issue among water influx,water injection and *** principle was elaborated through deduction of equilibrium equation and presentation of equilibrium curves with an“equilibrium point”.Influences of artificial controllable factors(*** ratio of injection to production and total well number)on equilibrium were particularly analyzed using field *** was found that the influences were mainly reflected as the location move of equilibrium point with factor *** reservoir pressure maintenance level was especially introduced to reveal the variation law of liquid rate and oil rate with the rising of water *** was also found that,even if reservoir pressure kept constant,oil rate still inevitably ***,in the field,a stabilized oil rate was always pursued for development ***,the equilibrium issue of stabilized oil production was studied deeply through probing into some effective measures to realize oil rate stability after the increase of water cut for the example *** example application indicated that the integrated approach was very practical and feasible,and hence could be used to the other similar reservoir.

关键词： Development equilibrium oil reservoir Water injection Water influx Water cut Stabilized production

Texture development of mesophase in reservoir pyrobitumen and the temperature-pressure converting of the gas reservoir in the Chuanzhong Uplift, Southwestern China

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Petroleum Science 2023年第2期20卷 721-732页

作者： Cheng-Yu Yang Mei-Jun Li Tie-Guan Wang Ning-Ning Zhong Rong-Hui Fang Long Wen State Key Laboratory of Petroleum Resources and Prospecting China University of PetroleumBeijing102249China oil&Gas Survey China Geological SurveyBeijing100083China The Key Laboratory of Unconventional Petroleum Geology China Geological SurveyBeijing100083China Exploration and Development Research Institute of Southwest oil&Gasfield Company PetroChinaChengduSichuan610041China

The Neoproterozoic-Lower Paleozoic dolostone gas reservoirs in the Chuanzhong Uplift in Southwestern China contain the mesophase pyrobitumen (pyrobitumen with mesophase). The mesophase in the pyrobitumen is mostly composed of a mixture of condensed macromolecule polycyclic aromatic hydrocarbons (PAH), and has been mostly converted to various grain, flow, and domain textures. The volcanic activity nearby the Chuanzhong Uplift may have generated very hot (over 300 °C) hydrothermal fluid, with migration of the fluid into the dolostone reservoir transforming the hydrocarbons in the reservoir into an anisotropic carbon by-product, which formed under high temperature and pressure conditions;over 300 °C and 200 MPa according to fluid inclusion analysis. The high temperature-pressure in reservoir was caused by sudden devolatilization of the hydrocarbons due to hydrothermal heating, which formed the unusual texture of the mesophase. The elliptical mesophase grains (EG), the honeycomb structure of pyrobitumen, and the occurrence of polarized classes of mesophase in single pyrobitumen deposits are all unusual textures. This study investigates the texture development of this pressure-affected pyrobitumen. Observation and study of the mesophase suggest that the class of mesophase in pyrobitumen is determined by temperature, while pressure (assessed from associated fluid inclusions) significantly affected the texture. Analysis of the texture of the pyrobitumen in conjunction with previous thermometry results from methane inclusions suggests that the high class mesophase of the pyrobitumen could be applied as a temperature indicator for geological conditions. Furthermore, the unusual textures of the pyrobitumen including elliptical mesophase grains (EG), the honeycomb structure of pyrobitumen, and the occurrence of polarized classes of mesophase in single pyrobitumen could reflect the abnormal high formation pressure.

关键词： Pyrobitumen Mesophase Optical texture Pressure affect oil reservoir Chuanzhong Uplift

Methane in soil gas and its transfer to the atmosphere in the Yakela condensed gas field in the Tarim Basin,Northwest China

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Petroleum Science 2013年第2期10卷 183-189页

作者： Tang Junhong Wang Guojian Yin Haoyong Li Hongjun College of Materials & Environmental Engineering Hangzhou Dianzi University Wuxi Research Institute of Petroleum Geology Research Institute of Petroleum Exploration and ProductionSINOPEC

In this study, by analyzing CH4 concentration and 613CCH4 in soil-gas profiles, the potentials of CH4 gas transfer from ground to atmosphere were studied at four representative sectors in the Yakela condensed gas field in the Tarim Basin, Xinjiang, China. These are： 1） the oil-gas interface sector, 2） fault sector, 3） oil-water interface sector, 4） an external area. Variation in CH4 in soil-gas profiles showed that CH4 microseepage resulted from the migration of subsurface hydrocarbon from deep-buried reservoirs to the earth＇s surface. It was found that CH4 from deep-buried reservoirs could migrate upwards to the surface through faults, fissures and permeable rocks, during which some CH4 was oxidized and the unoxidized methane remained in the soil or was emitted into the atmosphere. The lowest level of CH4 at the soil-gas profile was found at the CH4 gas-phase equilibrium point at which the CH4 migration upwards from deep-buried reservoirs and the CH4 diffusion downwards from the atmosphere met. The 613CcH4 and ethane, propane in soil gas exhibited thermogenic characteristics, suggesting the occurrence of CH4 microseepage from deep-buried reservoirs. A linear correlation analysis between CH4 concentrations in soil gas and temperature, moisture, pH, Eh, Ec and particle size of soil indicated that both soil Eh and soil temperature could affect CH4 concentration in soil gas while soil pH could indirectly influence soil methanotrophic oxidation via impacting soil Eh.

关键词： Soil gas CH4 concentration carbon isotope microseepage oil reservoir

Analyzing the effect of steam quality and injection temperature on the performance of steam flooding

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Energy Geoscience 2021年第1期2卷 83-86页

作者： Farzain Ud Din Kirmani Arshad Raza Raoof Gholami Muhammad Zeshan Haidar Chaudary Sarosh Fareed Department of Petroleum&Gas Engineering University of Engineering&Technology(UET)LahorePakistan Department of Energy Resources University of StavangerNorway

The heavy oil reservoirs are currently mainly targeted by thermal enhanced oil recovery technologies,particularly,steam *** flooding is carried out by introducing heat into the reservoir to unlock the recovery of heavy oil by reducing oil *** investigations were carried out to improve oil recovery by steam *** recently,high steam flooding is reported as an effective approach to improve recovery in high pressure heavy oil *** oil recovery from steam flooding is sub-stantially affected by the steam quality and injection *** this study,an attempt was made to look into the integration of parameters,*** quality and injection temperature upon steam flooding on oil recovery by using a simulation approach via *** results obtained indicated that high temperature along with the moderate value of steam quality gives the best result regarding oil recovery for steam flooding in an economical way.

关键词： Steam flooding Recovery Steam quality Temperature oil reservoir

Brief Review of Numerical Simulation Applied to Solve oil Extraction Problems

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International Journal of Geosciences 2015年第5期6卷 504-536页

作者： M.M.Onofre-Ramos L.Castaneda E.Austria-Aguilar E.E.Hernández-Martínez A.Oropeza-Osornio Escuela Superior de Ingeniería Mecánica y Eléctrica Unidad Ticomán Instituto Politécnico NacionalMéxico D.F.México

In the last decades, the numerical analysis has abridged the time and cost of oil extractive operations, and thus their implementation has been promoted so much that today is used to solve a large number of phenomena that occur during the extraction of hydrocarbons, not only economizing the operation, but also shedding light to the phenomenon, and helping to have a better understanding. Nevertheless in spite of the success of the applications of numerical simulations, it has been until today, looking for their optimization, because the discretization methods of the domain and the model are through meshes, which require modifying the physics of the problem so that this matches the numerical method, and not in backwards.

关键词： Numerical Simulation oil reservoir Smooth Particle Hydrodynamics

Global stability analytical method of cavern group in salt rock based on energy criterion

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Global stability analytical method of cavern group in salt r...

Harmonising Rock Engineering and the Environment—12th ISRM International Congress on Rock Mechanics

作者： Q.Yang J.Q.Deng Q.C.Lu & Y.R.Liu State Key Laboratory of Hydroscience and Engineering Tsinghua University Beijing China

＜正＞1 INTRODUCTION Salt rock possesses good leak tightness,low permeability, property of damage self-healing,so deep underground salt mine becomes the main media for energy reserves in countries of the *** from the thick salt dome abroad formed by marine deposit,the salt rock in China is the stratified structure formed by lacustrine *** has three characteristics: small thickness of salt layer,much insoluble intercalation, shallow burial *** intensive underground storage cavern group is constructed in such salt rock,the global sta-

关键词： numerical modeling oil reservoir rock caverns rock failure stability analysis

Model-Based Control and Optimization of Large Scale Physical Systems-Challenges in reservoir Engineering

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Model-Based Control and Optimization of Large Scale Physical...

2009中国控制与决策会议

作者： Paul M.J.Van den Hof Jan-Dirk Jansen cijs van Essen Okko H.Bosgra Delft Center for Systems and Control Delft University of TechnologyMekelweg 22628 CD DelftThe Netherlands Department of Geotechnology Delft University of TechnologyThe Netherlands Shell International Exploration and Production RijswijkThe Netherlands

＜正＞Due to urgent needs to increase efficiency in oil recovery from subsurface reservoirs new technology is developed that allows more detailed sensing and actuation of multiphase flow properties in oil *** of the examples is the controlled injection of water through injection wells with the purpose to displace the oil in an appropriate direction. This technology enables the application of model-based optimization and control techniques to optimize production over the entire production period of a reservoir,which can be around 25 *** scale reservoir flow models are used for optimizing production settings,but suffer from high levels of uncertainty and limited validation *** of the challenges is the development of reduced complexity models that deliver accurate long-term predictions,and at the same time are not more complex than can be warranted by the amount of data that is *** this paper an overview will be given of the problems and opportunities for model-based control and optimization in this field aiming at the development of a closed-loop reservoir management system.

关键词： oil reservoir production optimization optimal control parameter estimation dynamic optimization identifiability nonlinear observers

A fully coupled thermoporoelastic model for drilling in HPHT formations

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A fully coupled thermoporoelastic model for drilling in HPHT...

Harmonising Rock Engineering and the Environment—12th ISRM International Congress on Rock Mechanics

作者： A.Diek L.White J.-C.Roegiers D.Blankenship The University of Oklahoma NormanOKUSA Sandia National Laboratories AlbuquerqueNMUSA

＜正＞Coupled processes in porous media impact drilling and borehole *** coupling of the matrix deformation,and fluid and heat diffusions results in a time dependent response in the *** the drilling of an oil or gas well, temperature gradients between the drilling mud and the formation can significantly change the pore pressure and stress distributions around the borehole.A general theory of thermoporoelasticity is developed that fully couples the three processes: mechanical,hydraulic,and thermal in porous media

关键词： Geothermal oil reservoir physical modeling numerical modeling fluid flow

Geomechanical model test of underground caverns in salt rock

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Geomechanical model test of underground caverns in salt rock

Harmonising Rock Engineering and the Environment—12th ISRM International Congress on Rock Mechanics

作者： Y.R.Liu B.Li F.H.Guan & Q.Yang State Key Laboratory of Hydroscience and Hydraulic Engineering Tsinghua University Beijing China

＜正＞This paper simulated the injection-production cycles of 4-cavern reservoir group under different internal pressure with small block *** variation of the displacement and strain of the bedrock and the cavern group is automatically recorded by the displacement meters and the strain gauges buried in the *** stability under different gas production process,the failure pressure of the caverns and the impact of mudstone interlayer on cavern stability are analyzed.

关键词： oil reservoir physical modeling stability analysis