检索结果-南通市图书馆

Pressure transient characteristics of non-uniform conductivity fractured wells in viscoelasticity polymer flooding based on oil-water two-phase flow

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第1期21卷 343-351页

作者： Yang Wang Jia Zhang Shi-Long Yang Ze-Xuan Xu Shi-Qing Cheng National Key Laboratory of Petroleum Resources and Engineering China University of Petroleum(Beijing)Beijing102249China

polymer flooding in fractured wells has been extensively applied in oilfields to enhance oil *** contrast to water,polymer solution exhibits non-Newtonian and nonlinear behavior such as effects of shear thinning and shear thickening,polymer convection,diffusion,adsorption retention,inaccessible pore volume and reduced effective ***,the flux density and fracture conductivity along the hydraulic fracture are generally non-uniform due to the effects of pressure distribution,formation damage,and proppant *** this paper,we present an oil-water two-phase flow model that captures these complex non-Newtonian and nonlinear behavior,and non-uniform fracture characteristics in fractured polymer *** hydraulic fracture is firstly divided into two parts:high-conductivity fracture near the wellbore and low-conductivity fracture in the far-wellbore section.A hybrid grid system,including perpendicular bisection(PEBI)and Cartesian grid,is applied to discrete the partial differential flow equations,and the local grid refinement method is applied in the near-wellbore region to accurately calculate the pressure distribution and shear rate of polymer *** combination of polymer behavior characterizations and numerical flow simulations are applied,resulting in the calculation for the distribution of water saturation,polymer concentration and reservoir *** with the polymer flooding well with uniform fracture conductivity,this non-uniform fracture conductivity model exhibits the larger pressure difference,and the shorter bilinear flow period due to the decrease of fracture flow ability in the far-wellbore *** field case of the fall-off test demonstrates that the proposed method characterizes fracture characteristics more accurately,and yields fracture half-lengths that better match engineering reality,enabling a quantitative segmented characterization of the near-wellbore section with high fracture conductivity and th

关键词： polymer flooding Non-Newtonian fluid Non-uniform fracture conductivity Two-phase flow Pressure transient analysis

Necessity and feasibility of improving the residual resistance factor of polymer flooding in heavy oil reservoirs

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2010年第2期7卷 251-256页

作者： Shi Leiting Ye Zhongbin Zhang Zhuo Zhou Changjiang Zhu Shanshan Guo Zhidong State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University ChengduSichuan 610500 China

The efficiency of water flooding in heavy oil reservoirs would be improved by increasing the viscosity of the displacing phase, but the sweep efficiency is not of significance due to the low mobility of the vicious oil. On the basis of mobility control theory, increasing the residual resistance factor not only reduces the water-oil mobility ratio but also decreases the requirement for viscosity enhancement of the polymer solution. The residual resistance factor caused by hydrophobic associating polymer solution is higher than that caused by polyacrylamide solution in brine containing high concentrations of calcium and magnesium ions. The results of numerical simulations show that the polymer flooding efficiency improved by increasing the residual resistance factor is far better than that by only increasing solution viscosity. The recovery factor of heavy oil reservoirs （70 mPa·s） can be enhanced by hydrophobic associating polymer solution of high residual resistance factor （more than 3） and high effective viscosity （24 mPa·s）. Therefore, increasing the residual resistance factor of the polymer solution not only decreases the requirement for the viscosity of polymer solution injected into heavy oil reservoirs but also is favorable to enhanced oil recovery during polymer flooding.

关键词： Heavy oil reservoir polymer flooding mobility control residual resistance factor viscosity

Experimental Study and Numerical Simulation of polymer flooding

在线全文

学校读者我要写书评

暂无评论

Fluid Dynamics & Materials Processing 2022年第6期18卷 1815-1826页

作者： Lei Bai Kai Li Ke Zhou Qingshan Wan Pengchao Sun Gaoming Yu Xiankang Xin Xinjiang Oilfield Company PetroChina(Experimental Testing Research Institute)Karamay834000China Xinjiang Conglomerate Reservoir Laboratory Karamay834000China School of Petroleum Engineering Yangtze UniversityWuhan430100China

The numerical simulation of polymer flooding is a complex task as this process involves complex physical and chemical reactions,and multiple sets of characteristic parameters are required to properly set the *** present,such characteristic parameters are mainly obtained by empirical methods,which typically result in relatively large *** analyzing experimentally polymer adsorption,permeability decline,inaccessible pore volume,viscosity-concentration relationship,and rheology,in this study,a conversion equation is provided to convert the experimental data into the parameters needed for the numerical *** examples are provided to demonstrate the reliability of the proposed approach.

关键词： polymer flooding oil displacement mechanism flooding experiment numerical simulation characteristic parameter

Review on chemical enhanced oil recovery using polymer flooding: Fundamentals, experimental and numerical simulation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum 2020年第2期6卷 115-122页

作者： Ali Mohsenatabar Firozjaii Hamid Reza Saghafi Department of Petroleum Engineering Petroleum University of TechnologyAbadanIran IOR/EOR Research Institute National Iranian Oil CompanyTehranIran

The EOR techniques are employed to recover more oil from mature reservoirs after the primary and secondary oil production *** flooding as a chemical EOR method involves adding polymer molecules in order to increase water *** water viscosity will improve the mobility ratio of injected fluid to reservoir fluid toward a more favorable ***,vertical and areal sweep efficiencies are increased compared to typical water *** flooding will be most effective if applied in the early stages of a water flood while the mobile oil saturation is still *** is also a critical component when considering other chemical EOR technologies such as alkaline-polymer or *** present study covers two main *** the first part,fundamental of polymer flooding as it related to experimental work and simulation are *** challenge of polymer flooding applications in high temperature and high salinity(HTHS)environment is also discussed in this *** the second part,the synergy of polymer with surfactant and alkaline as chemical enhancing oil recovery(CEOR)methods is discussed.

关键词： polymer flooding Enhancing oil recovery Mobility control HPAM TVP

Study of polymer flooding in Heterogeneous Porous Media by Using Nuclear Magnetic Resonance

在线全文

学校读者我要写书评

暂无评论

Energy Engineering 2021年第5期118卷 1453-1467页

作者： Xing Zhang Shengli Oil Field Sinopec GroupDongying257000China

polymer has been successfully used to enhance crude oil recovery at high water cut ***,the application of polymer flooding is limited by the heterogeneity of *** this work,the role of polymer flooding in heterogeneous reservoir was explored by nuclear magnetic resonance(NMR)*** core displacement experiments were carried out to study polymer flooding in heterogeneous *** results showed that the polymer flooding area was related to permeability and pore *** the end of the water flooding stage,the residual oil was not evenly distributed in porous *** percent crude oil recovery increased with the increase of pore *** oil recovery from cores with larger pores was higher,and water broke through the highly permeable core *** 0.3 PV polymer injection,the water mobility of the high permeability core *** injection showed a dual effect,an oil displacement effect and a traction *** oil displacement effect was responsible for driving out the crude oil in large pores,whereas the traction effect was responsible for driving out residual oil from small *** 1 PV polymer injection,the polymer solution channeled through the highly permeable core *** crude oil in large pores was washed out *** NMR water-phase spectrum line of the highly permeable core was much higher than that of the low permeable *** different core permeability and porosity,the NMR peak of the crude oil-phase spectrum line indicated that the polymer flooding is mainly effective on pores>40μm.

关键词： Nuclear magnetic resonance relaxation time polymer flooding displacement effect traction effect

Optimized polymer flooding projects via combination of experimental design and reservoir simulation

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum 2017年第4期3卷 461-469页

作者： Ali Bengar Siyamak Moradi Mostafa Ganjeh-Ghazvini Amin Shokrollahi Department of Petroleum Engineering Petroleum University of Technology(PUT)AbadanIran IOR Research Institute No 22Negar AlleyValiasr St.Vanak Sq.TehranIran Young Researchers and Elites Club North Tehran BranchIslamic Azad UniversityTehranIran

The conventional approach for an EOR process is to compare the reservoir properties with those of successful worldwide ***,some proper cases may be neglected due to the lack of reliable data.A combination of experimental design and reservoir simulation is an alternative *** this work,the fractional factorial design suggests some numerical experiments which their results are analyzed by statistical *** determination of the main effects and interactions,the most important parameters of polymer flooding are studied by ANOVA method and Pareto and Tornado *** of main effects shows that the oil viscosity,connate water saturation and the horizontal permeability are the 3 deciding factors in oil *** proposed methodology can help to select the good candidate reservoirs for polymer flooding.

关键词： polymer flooding Fractional factorial design Reservoir simulation P-value ANOVA

CURRENT COLLOIDAL DISPERSION GELS ARE NOT SUPERIOR TO polymer flooding

在线全文

学校读者我要写书评

暂无评论

大庆石油地质与开发 2006年第5期25卷 71-80页

作者： Seright Randy Han Peihui Wang Dongmei . New Mexico Tech USA Exploration and Development Research Institute of Daqing Oil Field Company Ltd. PetroChina

The suggestion that the colloidal-dispersion-gel (CDG) process is superior to normal polymer flooding is misleading and generally incorrect. Colloidal dispersion gels, in their present state of technological development, should not be advocated as an improvement to, or substitute for, polymer flooding. Gels made from aluminum-citrate crosslinked polyacrylamides can act as conventional gels and provide effective conformance improvement in treating some types of excess water production problems if sound scientific and engineering principles are respected.

关键词： Colloidal-dispersion-gel(CDG) polymer flooding Controversy

Optimization of polymer flooding in a Heavy-Oil River Channel Sandstone Reservoir

在线全文

学校读者我要写书评

暂无评论

Optimization of Polymer Flooding in a Heavy-Oil River Channe...

作者： Tarkhan Imanov（塔尔汗）中国石油大学(北京)

学位级别：硕士

Some of oil fields in Azerbaijan have common challenge due to high level of water ***,rheological parameters of oil in place also add other difficulties while the reservoir have reached high water cut *** this kind of research have been learning throughout years,energy demanding boom in Azerbaijan still requires more researching than before,especially in field of enhanced oil recovery（EOR）.For research“SG400”oilfield have been chosen where part of Sangachal oilfield area and located at the delta of one of the biggest rivers in Azerbaijan:Kura *** 1988,it began to go through development and contains Heavy oil which is hard to *** be more specific,oil-water mobility ratio is so high,therefore,it is almost impossible to extract oil without increasing *** situation is worst in one specific reservoir of field which is named“R45”,which contains high amount of sand sediments due to river *** majority cases sand is considered one of the depositions for oil exploitation with water injection but in this field,due to combination of high heterogeneity in permeability and nature of oil result with poor sweep efficiency of *** flooding is considered one of the most effective methods for that kind of reservoir,because polymer has an ability to enlarge water *** can regulate the mobility of the water phase while also increasing driving efficiency in polymer *** simulate such reservoir with polymer flooding,bunch of factors must be considered,because results are sensitive to many factors such as porosity,relative permeability,permeability distribution,polymer adsorption and polymer shear thinning effect *** of simulations represent that for reservoir（river-channel）with combination of Heavy oil properties and high permeability heterogeneity in reservoir“R45”,polymer flooding is promising action among the other EOR techniques due to high oil recovery after implication of *** detail,simulation illustra

关键词： Black oil model Mobility ratio polymer flooding polymer retention effect polymer adsorption

Characteristics of resistivity log response of oil layers under polymer flooding

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

Applied Geophysics 2012年第2期9卷 187-194,235页

作者：俞军潘保芝杨青山中国石油勘探开发研究院北京100083 吉林大学长春130036 大庆油田有限责任公司勘探开发研究院大庆162712

Resistivity log responses are different when the oil layers is filled by a polymer solution or water and it seriously affects the log interpretation of the water flooded layer. In this paper, we first analyze the electrical properties of the polymer solution. Then, according to the different processes for polymer flooding the reservoir, we perform rock resistivity experiments and analyze the rock resistivity variations in different displacement phases. We also compare the resistivity log responses of oil layers filled with the polymer solution to those filled with water. The results show that when displacing the oil-bearing core by different polymers, the resistivity changes monotonously decrease and show either ＂W＂ type or ＂S＂ type. The resistivity log responses are weak when displacing water and there is no flooded show if the oil layer is injected by a fresh water polymer solution. If the oil layer is injected by a sewage polymer solution, the resistivity log response has similar characteristic as a polluted water flooded layer.

关键词： polymer flooding res!stivity experimental study log response