检索结果-南通市图书馆

New insights into the DPR mechanism of elastic energy released by polymer gel for enhanced oil recovery

Petroleum 2024年第3期10卷 539-547页

作者： Hu Jia Junyi Wu Shaowei Wu yanbin liang Minghao Wang Xiaojin Wan Pengwu Li State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina CNOOC Zhanjiang Branch ZhanjiangChina Oil Production Technology Institute of PetroChina Dagang Oilfield Company TianjinChina

Polymer gel was widely used as water shutoff agent in mature oil *** the results of single-phase plugging experiments show that the plugging rate of the polymer gel to the oil phase is lower than that of the water ***,the disproportionate permeability reduction(DPR)mechanism of polymer gels still remains *** this paper,we used four gel formulations including polyethyleneimine(PEI)and phenol-formaldehyde crosslinked gel with and without adding laponite to investigate the effect of gel elastic property on the water shutoff *** result of sand pack flooding experiments shown that the gel with higher elastic modulus has better effects on decreasing water cut and increasing oil *** adding laponite,the elastic modulus of phenol-formaldehyde crosslinked gel increased from 64.2 Pa to 192 Pa,and the elastic modulus of PEI crosslinked gel increased from 27.4 Pa to 36.5 *** to the phenol-formaldehyde-HAPM gel,the oil recovery of laponite-phenol-formaldehyde-HPAM gel increased by 5.2%and the maximum water cut decreased by 8.3%.Besides,comparing with PEI-HPAM gel,the oil recovery of laponite-PEI-HPAM gel increased by 2.7%and the water cut dropped by 27.8%.In the meanwhile,the laponite-phenol-formaldehyde-HPAM gel with higher elastic modulus obviously swells in the formation water but almost remains constant in oil at 105℃.The mass of gel soaked in the formation water increased from 42 g to 96 g and the gel volume increased by 300%within 48 *** study improves the understanding of the DPR mechanism of polymer gel for water shutoff.

关键词： Gel elasticity Water shutoff DPR Laponite Oil recovery

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of fuzzy comprehensive evaluation method to assess effect of conformance control treatments on water-injection wells

引用

Petroleum 2024年第1期10卷 165-174页

作者： Hu Jia Pengwu Li Wei Lv Jianke Ren Chen Cheng Rui Zhang Zhengjun Zhou yanbin liang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina Oil and Gas Technology Research Institute PetroChina Changqing Oilfield CompanyXi'anChina Oil Production Technology Institute of PetroChina Dagang Oilfield Company TianjinChina

As an effective method to prolong the life of mature field,conformance control in water-injection well has been used ***,effect evaluation of conformance control has attracted great attention because it is an important guideline for the design of later enhanced oil recovery(EOR)***,production responses such as excessive water reduction and oil production increment are widely used as the ***,production responses may be unreliable due to the difficulty in determining an effective injection well which is caused by a large number of treated water-injection wells in a well ***,with the application of fuzzy comprehension evaluation(FCE),five evaluation indexes(injection pressure,injectivity index,slope of hall curve,variation coefficient and homogenization coefficient of injection profile)describe injection responses were selected to establish a new evaluation method in this *** on fuzzy mathematics,FCE reflects the difference of evaluation ***,weights of evaluation indexes were obtained by analytic hierarchy process(AHP),which made the results more *** Bai 239 oilfield as an example,the five injection responses indexes were used to assess treatment effect on five water-injection wells by single index evaluation and *** results showed that among the five evaluation indexes mentioned above,the slope of hall curve was the most important factor affected evaluation *** single index evaluation,opposite results may be produced easily on account of the one-sidedness of single index or human ***,we found that effective treatment was a relative concept *** result of FCE was consistent with single index evaluation but FCE was more *** study suggests that FCE could be applied to another field such as water flooding,acidizing and hydraulic fracturing.

关键词： Enhanced oil recovery Injection responses Fuzzy mathematics Analytic hierarchy process Effect evaluation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

The ternary combination of polymer gel, microsphere and surfactant for conformance control and oil displacement to improve oil recovery in strong heterogeneous reservoir

引用

Petroleum Research 2023年第2期8卷 151-166页

作者： Siqi Liu Hu Jia Hongshen Wang yanbin liang Duansheng Shi Zhichong Lu Junyi Wu State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina CNOOC Energy Technology&Services Limited Engineering Technology BranchTianjinChina Oil Production Technology Institute of PetroChina Dagang Oilfield Company TianjinChina

The reservoir heterogeneity of Suizhong 36-1 oilfield is very obvious,the average permeability reaches ***-term water injection development leads to serious water channeling in high permeability layers,resulting in ineffective circulation of injected water and reduction of oil *** is urgent to form an effective EOR *** this paper,the oil displacement effect of different combination slugs including polymer gel,polymer microsphere and surfactant is evaluated by means of conformance control and chemical ***-layer heterogeneous 3-D plate model is used for oil displacement *** experimental results show that the combination slug sequentially composed of polymer gel,polymer microspheres and surfactant have the best oil displacement effect with the oil recovery increment by 21.2% after the first water *** addition,using the best slug combination for two rounds flooding,the recovery factor increased by 28.2% compared with the first water *** paper provides some new insights for enhanced oil recovery in strong heterogeneity reservoir.

关键词： Heterogeneity reservoir EOR Polymer gel Microsphere Surfactant Combined slug

来源：

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

知识表示的F-K系统

引用

南京航空航天大学学报 2000年第6期32卷 614-619页

作者：梁彦彬南京航空航天大学计算机科学与工程系南京210016

对经典知识表示系统 (多系统 )进行了扩充 ,引入一个刻划“大概知道”的模态词“F”,并建立了相应的公理系统 F- K,该公理系统除包含“F”外也包含经典模态词“K”。同时 ,基于滤子对经典 Kripke框架及模型进行了扩充 ,从而给出了“F”... 详细信息

对经典知识表示系统 (多系统 )进行了扩充 ,引入一个刻划“大概知道”的模态词“F”,并建立了相应的公理系统 F- K,该公理系统除包含“F”外也包含经典模态词“K”。同时 ,基于滤子对经典 Kripke框架及模型进行了扩充 ,从而给出了“F”的语义 ,并证明了该语义下 F-

关键词：人工智能模态逻辑知识表示克里普克结构

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于光纤陀螺的转台周期性误差抑制方法

引用

红外与激光工程 2015年第6期44卷 1898-1903页

作者：杨永清梁雁冰李治国梁冬生中国科学院西安光学精密机械研究所陕西西安710119 中国科学院大学北京100049

为抑制测角系统周期性测量误差对光电跟踪系统速度平稳性和成像效果的影响,采用光纤陀螺系统建立误差模型和误差补偿器,对系统进行误差补偿控制。首先,对测角系统测量结果中含有周期性误差的机理进行分析,建立了周期性测角误差的数学模... 详细信息

为抑制测角系统周期性测量误差对光电跟踪系统速度平稳性和成像效果的影响,采用光纤陀螺系统建立误差模型和误差补偿器,对系统进行误差补偿控制。首先,对测角系统测量结果中含有周期性误差的机理进行分析,建立了周期性测角误差的数学模型;其次,采用高精度光纤陀螺建立了一套基于傅里叶理论的角度测量误差模型采集系统,并通过七个步骤提取了测角误差模型的具体表达式;然后,根据提取的测角误差表达式,分四个步骤对系统周期性误差进行补偿控制。最后,通过跟踪成像实验来验证控制补偿的有效性。实验结果表明,跟踪速度误差的最大值降低到0.04(°)/s,比未补偿控制时降低了8倍左右,满足光学成像系统速度误差小于0.1(°)/s的要求,条纹成像效果得到了明显改善。

关键词：光纤陀螺测角周期误差跟踪转台傅里叶理论

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

金融支持关中协同发展研究

引用

西部金融 2021年第7期 83-89页

作者：梁艳彬中国人民银行渭南市中心支行陕西渭南714000

协同发展是促进区域经济发展的有效路径,金融作为经济运行的血脉,如何支持区域协同发展具有重要意义。本文基于陕西省关中区域,运用复合系统协同度评价模型,测度了2010-2019年十年来关中地区的经济协同度,并通过多元线性回归模型,分析... 详细信息

协同发展是促进区域经济发展的有效路径,金融作为经济运行的血脉,如何支持区域协同发展具有重要意义。本文基于陕西省关中区域,运用复合系统协同度评价模型,测度了2010-2019年十年来关中地区的经济协同度,并通过多元线性回归模型,分析了各地金融支持关中区域经济协同发展的力度,最后对如何更好地支持区域经济协同发展,从政府和金融层面提出了政策建议。

关键词：关中协同发展复合系统评价区域经济

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

一种高电源抑制比的CMOS带隙基准电压源

引用

华中科技大学学报（自然科学版） 2007年第11期35卷 106-108页

作者：张道礼梁延彬吴艳辉陈胜华中科技大学电子科学与技术系湖北武汉430074 弥亚微电子上海有限公司上海201204

基于CSMC 0.5μm CMOS工艺,采用CMOS技术,设计一种高性能的带隙基准电压源.带隙基准电压源输出电压经过电平转换电路,反馈回带隙基准电压源中的运算放大器,可以获得良好的电源特性和带负载能力.采用可修调电阻阵列,精确地控制温度系数.... 详细信息

基于CSMC 0.5μm CMOS工艺,采用CMOS技术,设计一种高性能的带隙基准电压源.带隙基准电压源输出电压经过电平转换电路,反馈回带隙基准电压源中的运算放大器,可以获得良好的电源特性和带负载能力.采用可修调电阻阵列,精确地控制温度系数.仿真结果表明:在5 V电源电压下,温度系数为8.28×10-6/℃,低频电源抑制比为83 dB.

关键词：带隙基准反馈温度系数电源抑制比可修调电阻

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

农村地区支付服务环境建设与农民收入增长关系研究——以陕西省渭南市为例

引用

西部金融 2016年第6期 72-75页

作者：梁艳彬中国人民银行渭南市中心支行陕西渭南714000

近年来,围绕"稳增长促消费"的发展目标,中央下大气力拓宽农民增收渠道,增强农村活力。改善农村地区支付结算环境,促进农村地区支付转型,也是促进农民收入增加,推进新型城镇化建设的需要。本文首先构建了描述农村地区支付服务环境建设情... 详细信息

近年来,围绕"稳增长促消费"的发展目标,中央下大气力拓宽农民增收渠道,增强农村活力。改善农村地区支付结算环境,促进农村地区支付转型,也是促进农民收入增加,推进新型城镇化建设的需要。本文首先构建了描述农村地区支付服务环境建设情况的4个指数,其次以渭南市为例,通过主成分分析将4个指数"浓缩"成1个综合指数,最后利用时间序列分析论证了农村支付环境建设与农民收入之间的协整关系,将农村支付环境建设对农民收入增长的促进作用进行了量化。

关键词：农村支付环境建设农民收入主成分分析

来源：

维普期刊数据库

同方期刊数据库评论