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Episodic Fluid Injections in Overpressured Basins:A Case Study from Yinggehai Basin

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Journal of Earth Science 1999年第3期18卷 233-240页

作者： Hao Fang Hu Jianwu Jiang Jianqun(Department of petroleum Geology, china University of Geosciences, Wuhan 430074)Gong Zaisheng Yang Jiaming(china national Offshore Oil corporation, beijing 100083) Department of petroleum Geology China University of Geosciences Wuhan 430074 china national Offshore Oil corporation Beijing 100083

The characteristics, origin and injection history of the Dongfang gas field, the largest gas field found in the Yinggehai basin, are studied by integrated geological, geothermal and geochemical data. The gas field shows considerable variation in hydrocarbon gas, nitrogen and carbon dioxide content, aud has been filled by at least four stage fluids. A strong thermal anomaIy caused by hydrothermal fluid flows occurs in the gas field, as evidenced rrom drill-stem test and fluid iuclusion homogenization temperatures, rock-eval tmax,vitrinite reflectance as well as clay-mineral transformation profiles. Such a thermal anomaly suggests focused, rapid flow of deeply-sourced hydrothermal rluids. The inter-reservoir heterogeneities, the strong migotion rractionation related to abrupt changes in pressure and temperature and tbe short-lived, transient nature of the thermal effect of fluid flow are evidences of episodic rluid injections from the overpressured systems into the reservoirs.

关键词： fluid history epidemic injection overpressure Yinggehai basin

A novel four-way combining catalysts for simultaneous removal of exhaust pollutants from diesel engine

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Journal of Environmental Sciences 2010年第7期22卷 1104-1109页

作者： Jian Liu,Jie Xu,Zhen Zhao,Aijun Duan,Guiyuan Jiang,Yanni Jing State Key Laboratory of Heavy Oil Processing,china University of petroleum,beijing 102249,china. [a] State Key Laboratory of Heavy Oil Processing China University of Petroleum Beijing 102249 China

A novel four-way combining catalysts containing double layers was applied to simultaneously remove four kinds of exhaust pollutants （NOx, CO, HC and PM） emitted from diesel engine. The four-way catalysts were characterized using scanning electron microscope （SEM） and Ultraviolet visible diffuse reflectance spectroscopy （UV-Vis DRS）. Their catalytic performances were evaluated by temperature-programmed reaction technology. The double layer catalysts could effectively remove the four main pollutants. The highest catalytic activity was given by the two-layered catalysts of La0.6 K0.4CoO3/Al2O3 and W/HZSM-5. Under the simulated exhaust gases conditions, the peak temperature of the soot combustion was 421℃, the maximal conversion of NO to N2 was 74%, the temperature of the HC total conversion was 357℃, and the maximum conversion ratio of CO was 99%.

关键词： four-way combining catalyst diesel engine exhaust double layers perovskite oxides zeolite catalysts

Hierarchy modeling of subsurface palaeochannel reservoir architecture

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Science china Earth Sciences 2008年第S2期51卷 126-137页

作者： WU ShengHe1,YUE DaLi1,LIU JianMin2,SHU QingLin2,FAN Zheng1,3 & LI YuPeng1 1 Earth Sciences and Geoinformatics School,china University of petroleum,beijing 102249,china 2 SINOPEC Shengli Oilfield Co. Ltd.,Dongying 257000,china 3 beijing Telon High-tech corporation,beijing 100085,china china Univ Petr Earth Sci & Geoinformat Sch Beijing 102249 Peoples R China SINOPEC Shengli Oilfield Co Ltd Dongying 257000 Peoples R China beijing Telon Hightech Corp Beijing 100085 Peoples R China

The studies on fluvial reservoir architecture are mainly aimed at outcrop and modern deposition,but rarely at the subsurface reservoir,so there are few effective methods to predict the distribution of subsurface reservoir architectures. In this paper,taking the meandering river reservoir of Guantao formation Gudao Oilfield,Jiyang depression,Baohai Gulf Basin,East china as an example,the archi-tectural modeling method of complex meandering belt reservoir is proposed,that is hierarchy con-straint,pattern fitting and multi-dimensional interaction. Architectures of meandering river reservoir can be divided into three hierarchies: meandering channel sandbody,point bar and lateral accretion body. Different hierarchies of the quantitative architecture pattern are fitted to subsurface well data (including dynamic monitoring data) in different hierarchies through one-dimensional hole,2D profiles and plane and 3D space,which are verified by each other. And then 3D model in different hierarchies is established. At the same time,the quantificational relationship between width of active river and the scale of point bar is set up,and the scale of lateral accretion sand body and shale beddings is con-firmed with horizontal well data. The study not only has significant meaning on the development of geology,but also can improve the oilfield exploitation greatly.

关键词： reservoir architecture hierarchical modeling meandering river point bar lateral accretion body

Landscape ecological assessment and eco-tourism development in the South Dongting Lake Wetland, china

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Journal of Environmental Sciences 2003年第2期15卷 271-278页

作者： HE Ping 1,2, WANG Bao-zhong 1,3 (1.Central South Forestry University, Zhuzhou 412006, china 2.china International Engineering Consulting corporation, beijing 100044, china 3.Nanjing University, Nanjing 210093, china Central South Forestry University Zhuzhou 412006

As an important resource and the living environment of mankind, wetland has become gradually a highlight, strongly concerned and intensively studied by scientists and sociologists. The governments in the world and the whole society have been paying more and more attention on it. The Dongting Lake of china is regarded as an internationally important wetland. For a rational development and protection of the wetland, an investigation and studied on its resources and its value to tourism in the South Dongting Lake was conducted, to create an assessment system of the ecological landscapes, and to evaluate qualitatively and quantitatively the value of wetland landscape to the eco-tourism. The results showed that the scenic value of the South Dongting Lake Wetland satisfied the criterion of AAAA grade of china national scenic attraction. The eco-tourism value of the landscape cultures in the South Dongting Lake Wetland was discussed with emphasis. It were formulated that a principle and frame of sustainable exploitation of the wetland landscapes and it was proposed as well that establishing a Wetland Park and developing eco-tourism in the South Dongting Lake. Wetland is a fragile ecosystem with low resistance to the impact of the exploitation. Thus, we must pay intensively attention to the influence of exploitation on the landscape, take the ecological risk in account to employ a right countermeasure and avoid the negative affection.

关键词： South Dongting Lake wetland landscape eco-tourism Wetland Park ecological assessment

NUMERICAL SIMULATION OF TRANSIENT CUTTINGS TRANSPORT WITH FOAM FLUID IN HORIZONTAL WELLBORE

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Journal of Hydrodynamics 2009年第4期21卷 437-444页

作者： WANG Rui-he CHENG Rong-chao WANG Hai-ge BU Yu-huan College of petroleum Engineering China University of Petroleum Dongying 257061 China CNPC Drilling Research Institute Beijing 100195 China

With considering the interlayer mass transfer and fluid influx from the reservoir, a one-dimensional two-layer hydraulic model was established to describe the mechanism of transient cuttings transport with foam fluid in horizontal well section. The model was numerically calculated based on the modified SIMPLE algorithm, and the height of cuttings bed was predicted by the trial-and-error method. Sensitivity analysis was conducted on the affecting factors on the cuttings transport performance. Results show that cuttings deposition moves along the horizontal wellbore from the drilling bit, and finally achieves a steady state with dynamic balance. Dimensionless cuttings bed height decreases with the increase of foam quality or foam flow rate, but increases with the increase of drillpipe eccentricity, cuttings size or drilling rate. The influx of water and gas from the reservoir is helpful to improve the cuttings transport efficiency with foam. The proposed model offers theoretical guidelines for hydraulic parameter design and hole cleaning control in foamed horizontal drilling.

关键词： foam fluid horizontal wellbore drilled cuttings theoretical model numerical simulation

Reply to ‘Calculation of depth to detachment and its significance in the Kuqa Depression:A discussion’

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petroleum Science 2009年第1期6卷 21-23页

作者： Yu Yixin Tang Liangjie He Chunbo Chen Xuyun State Key Laboratory of petroleum Resource and Prospecting China University of Petroleum Beijing 102249 China Basin ＆ Reservoir Research Center China University of Petroleum Beijing 102249 China

This paper mainly replies to the discussion by Li et al （2009） on the calculation of the detachment depths in the Kuqa Depression. We think that viscous material flowing into or out of the cross section can affect the validity of the calculation method, yet the number of detachment levels does not bring any drawbacks to the calculation. In the Kuqa Depression, the salt flow influenced the structural deformation to some extent, and affected slightly the accuracy of the calculated depths of the true detachment levels. However, it does not mean that the calculation method loses effectiveness in the study area. Therefore, the calculation results are still relatively believable.

关键词： Excess area detachment level reply discussion Kuqa Depression

Biogas recovery from microwave heated sludge by anaerobic digestion

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Science china(Technological Sciences) 2010年第1期53卷 144-149页

作者： QIAO Wei1,WANG Wei2,ZHU CuiPing3 & ZHANG ZhongZhi1 1 College of Chemical Science and Engineering,china University of petroleum,beijing 102249,china 2 Department of Environmental Science and Engineering,Tsinghua University,beijing 10084,china 3 J & K china Cleaning Energy Technology Co.Ltd.,beijing 100085,china 1. College of Chemical Science and Engineering China University of Petroleum Beijing 102249 China2. Department of Environmental Science and Engineering Tsinghua University Beijing 10084 China3. J & K China Cleaning Energy Technology Co. Ltd. Beijing 100085 China

Biogas generated from sewage sludge,livestock waste,and food waste by anaerobic digestion is a valuable renewable energy ***,conventional anaerobic digestion is not an efficient process.A long hydraulic retention time and low biogas recovery rate hinder the applications of those *** effective pretreatment method to destroy sludge microbial cells has been one of the major concerns regarding improvement of the biogas *** article focuses on the effects of microwave heating on sludge anaerobic *** suspended solid(VSS) and chemical organic demand solubilization of heated sludge were *** heating was found to be a rapid and efficient process for releasing organic substrates from *** increase of organic dissolution ratio was not obvious when holding time was over 5 min with microwave *** effect of the VSS solubilization was primarily dependent on heating *** highest value of VSS dissolving ratio,36.4%,was obtained at 170°C for 30 *** COD dissolving ratio was about 25% at 170°*** organic carbon of treated sludge liquor was 1.98 and 2.73 g/L at 150°C and 170°C for 5 min,respectively.A biochemical methane potential(BMP) test of excess sludge and a mixture of primary and excess sludge demonstrated an increase in biogas *** total biogas from microwave treated mixture sludge increased by 12.9% to 20.2% over control after 30 days of *** production was 11.1% to 25.9% higher for excess sludge than for untreated *** VS removal ratios of mixture sludge and excess sludge were 12% and 11% higher,respectively,compared to the untreated sludge.

关键词： biogas recovery microwave heating sludge anaerobic digestion

FINITE VOLUME METHOD FOR SIMULATION OF VISCOELASTIC FLOW THROUGH A EXPANSION CHANNEL

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Journal of Hydrodynamics 2009年第3期21卷 360-365页

作者： FU Chun-quan JIANG Hai-mei YIN Hong-jun SU Yu-chi ZENG Ye-ming Key Laboratory of Enhanced Oil and Gas Recovery of Ministry of Education Daqing Petroleum Institute Daqing 163318 China china national Offshore Oil Company Research Center Beijing 100027 China china national Offshore Oil corporation Limited Beijing 100010 China Oil Recovery Plant No.1 Daqing Oilfield Corp. Ltd. Daqing 163001 China

A finite volume method for the numerical solution of viscoelastic flows is given. The flow of a differential Upper-Convected Maxwell （UCM） fluid through an abrupt expansion has been chosen as a prototype example. The conservation and constitutive equations are solved using the Finite Volume Method （FVM） in a staggered grid with an upwind scheme for the viscoelastic stresses and a hybrid scheme for the velocities. An enhanced-in-speed pressure-correction algorithm is used and a method for handling the source term in the momentum equations is employed. Improved accuracy is achieved by a special discretization of the boundary conditions. Stable solutions are obtained for higher Weissenberg number （We）, further extending the range of simulations with the FVM. Numerical results show the viscoelasticity of polymer solutions is the main factor influencing the sweeo efficiency.

关键词： Upper-Convected Maxwell (UCM) model finite volume method viscoelasticity sweep efficiency

Functional characterization of a biosurfactant-producing thermo-tolerant bacteria isolated from an oil reservoir

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petroleum Science 2011年第3期8卷 353-356页

作者： Wang Jing Ji Guang Tian Jing Zhang Hongdan Dong Hanping Yu Li College of Chemical Engineering China University of Petroleum Beijing 102249 China Langfang Branch Research Institute of Petroleum Exploitation and Development China National Petroleum Corporation Hebei 065007 China

A Bacillus subtilis strain JA-1 isolated from an oil reservoir was studied. This strain is capable of growth and producing biosurfactant at a temperature of 60 ℃. In nutrient medium it produced biosurfactant which reduced the surface tension from 68.2 mN/m to 28.3 mN/m, with the critical micelle concentration （CMC） of 48 mg/L. The measured surface tension indicated that the biosurfactant possessed stable surface activity at high temperature and a specific range of pH and salt concentrations. The results of thin layer chromatography （TLC） together with FT-IR showed that the metabolic product of strain JA-1 is a lipopeptide biosurfactant. The ability to growth at high temperature and to produce biosurfactant makes strain JA-1 promising for enhanced oil recovery.

关键词： Biosurfactant bacillus subtilis lipopeptide surface tension critical micelle concentration(CMC)