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Numerical simulation and experimental study on dissolving characteristics of layered salt rocks
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作者 Qiqi Wanyan Yiming Xiao Na Tang 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第5期1030-1036,共7页
Underground salt cavern reservoirs are ideal spaces for energy storage. China is rich in salt rock resources with layered lacustrine sedimentary structures. However, the dissolution mechanism of layered salt rocks rem... Underground salt cavern reservoirs are ideal spaces for energy storage. China is rich in salt rock resources with layered lacustrine sedimentary structures. However, the dissolution mechanism of layered salt rocks remains poorly understood, resulting in significant differences between the actual measurements and the designed indices for the layered salt rock water-soluble cavity-making cycle and the cavity shape. In this work, the dissolution rates of 600 groups of layered salt rocks in China under different conditions were determined experimentally.Thus, the established artificial neural network prediction model was used to assess the effects of the contents of NaCl, Na2 SO4, and CaSO4 in the salt rocks, concentrations, dissolution angles, and flow rates on their dissolution rates by performing ANOVA and F-test. The results provide a theoretical basis for evaluating the dissolution rate of layered salt rocks under different conditions and for the numerical simulation of the layered salt rock water-soluble cavity-making process. 展开更多
关键词 SALT CAVERN RESERVOIRS LAYERED SALT rock DISSOLUTION rate ANOVA
Animal influenza virus 预览
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作者 CHEN Hua-lan 《农业科学学报:英文版》 SCIE CAS CSCD 2019年第7期1419-1420,共2页
Animal influenza viruses continuously circulate in their reservoirs in nature and pose severe threat to humans and animals;therefore,understanding and control of animal influenza viruses will have important implicatio... Animal influenza viruses continuously circulate in their reservoirs in nature and pose severe threat to humans and animals;therefore,understanding and control of animal influenza viruses will have important implication to public health and social economy. 展开更多
关键词 viruses RESERVOIRS PUBLIC HEALTH
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巴喀地区八道湾组致密砂岩储集层非均质特征及影响因素 预览
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作者 崔立伟 张晨光 +2 位作者 张苏江 姜爱玲 刘桂云 《科技通报》 2019年第2期26-32,共7页
利用钻井岩心、测井、矿物成份及综合测试等资料,结合物性、地震数据,对巴喀地区八道湾组致密砂岩储集层的物源及非均质性特征进行分析研究。结果表明:巴喀地区八道湾组沉积时期物源来自北部的博格达山;区内储集层的层内、层间及平面非... 利用钻井岩心、测井、矿物成份及综合测试等资料,结合物性、地震数据,对巴喀地区八道湾组致密砂岩储集层的物源及非均质性特征进行分析研究。结果表明:巴喀地区八道湾组沉积时期物源来自北部的博格达山;区内储集层的层内、层间及平面非均质性均很强,其非均质性受沉积相与沉积环境、成岩作用共同的影响。层内非均质性上八二段的非均质程度强于八一段;层间非均质性表现为随埋藏深度增加,孔隙度和渗透率呈现先增大后减小的变化;平面非均质性上储集层孔隙度存在两个高值区,向四周孔隙度数值逐渐降低;渗透率存在一个高值区,向四周数值也逐渐降低。 展开更多
关键词 巴喀地区 八道湾组 储集层 非均质性 物源
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The BET bromodomain inhibitor apabetalone induces apoptosis of latent HIV-1 reservoir cells following viral reactivation
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作者 Xuan-xuan Zhang Jian Lin +5 位作者 Tai-zhen Liang Heng Duan Xing-hua Tan Bao-min Xi Lin Li Shu-wen Liu 《中国药理学报:英文版》 SCIE CAS CSCD 2019年第1期98-110,共13页
The persistence of latent HIV-1 reservoirs throughout combination antiretroviral therapy (cART)is a major barrier on the path to achieving a cure for AIDS.It has been shown that bromodomain and extra-terminal (BET)inh... The persistence of latent HIV-1 reservoirs throughout combination antiretroviral therapy (cART)is a major barrier on the path to achieving a cure for AIDS.It has been shown that bromodomain and extra-terminal (BET)inhibitors could reactivate HIV-1 latency, but restrained from clinical application due to their toxicity and side effects.Thus,identifying a new type of BET inhibitor with high degrees of selectivity and safety is urgently needed.Apabetalone is a small-molecule selective BET inhibitor specific for second bromodomains,and has been evaluated in phase Ⅲ clinical trials that enrolled patients with high-risk cardiovascular disorders, dyslipidemia,and low HDL cholesterol,in the current study,we examined the impact of apabetalone on HIV-1 latency.We showed that apabetalone (10-50 μmol/L)dose-dependently reactivated latent HIV-1 in 4 types of HIV-1 latency cells in vitro and in primary human CD4+T cells ex vivo.In ACH2 cells,we further demonstrated that apabetalone activated latent HIV-1 .through Tatdependent P-TEFB pathway,i.e.,dissociating bromodomain 4 (BDR4)from the HIV-1 promoter and recruiting Tat for stimulating HIV-1 elongation.Furthermore,we showed that apabetalone (10-30 μmol/L)caused dose-dependent cell cycle arrest at the G1/G0 phase in ACH2 cells,and thereby induced the preferential apoptosis of HIV-1 latent cells to promote the death of reactivated reservoir cells.Notably,cardiovascular diseases and low HDL cholesterol are known as the major side effects of cART,which should be prevented by apabetalone.In conclusion,apabetalone should be an ideal bifunctional latency-reversing agent for advancing HIV-1 eradication and reducing the side effects of BET inhibitors. 展开更多
关键词 LATENT HIV-1 reservoirs latency reversing agent BET inhibitors apabetalone P-TEFB HIV eradication.
考虑水文情势变化的黄柏河流域纳污能力 预览
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作者 刘君龙 陈进 +3 位作者 周晓明 周召红 殷大聪 周明圆 《南水北调与水利科技》 CAS 北大核心 2019年第1期84-91,共8页
水体的纳污能力是指在满足水功能区水环境质量达标的基础上,水体最大允许的纳污量,其精确核定对水资源合理开发利用与有效保护具有重要的现实意义。水利工程、人类活动等使河流原有水文情势发生了不同程度的改变,水文情势变化影响下的... 水体的纳污能力是指在满足水功能区水环境质量达标的基础上,水体最大允许的纳污量,其精确核定对水资源合理开发利用与有效保护具有重要的现实意义。水利工程、人类活动等使河流原有水文情势发生了不同程度的改变,水文情势变化影响下的纳污能力精确核定现已逐渐成为当前亟待研究和解决的问题。以长江流域的黄柏河为例,选取汇入支流、水库和调(引)水工程3个主要影响因素分析了对河道水文情势及其对纳污能力的影响,根据水文情势的差异性变化提出了相应的纳污参数确定方法,并基于一维水质数学模型计算得出黄柏河流域水体的纳污能力,最后以典型区段黄柏河东支保护区为例与传统法的纳污能力结果进行了对比分析。结果表明考虑水文情势变化的纳污能力研究中所提出的纳污参数确定方法在一定程度上有助于水域纳污能力的准确核定。研究结果可以为区域有效保护水资源,防治水污染,改善水环境提供一定的技术参考。 展开更多
关键词 纳污能力 水利工程 人类活动 水文情势 黄柏河 汇入支流 水库 调(引)水
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钼同位素地球化学研究进展及其在成矿作用研究中的应用潜力 预览
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作者 王欢 姚军明 李杰 《地球化学》 CAS CSCD 北大核心 2019年第3期213-229,共17页
近年来,随着多接收器电感耦合等离子体质谱仪(MC-ICP-MS)的广泛应用和测试精度的不断提高,非传统稳定同位素成为同位素地球化学最前沿和最活跃的研究领域。其中钼同位素作为非传统稳定同位素发展较为成熟的方向之一,已经逐步应用到地球... 近年来,随着多接收器电感耦合等离子体质谱仪(MC-ICP-MS)的广泛应用和测试精度的不断提高,非传统稳定同位素成为同位素地球化学最前沿和最活跃的研究领域。其中钼同位素作为非传统稳定同位素发展较为成熟的方向之一,已经逐步应用到地球科学、生命科学、环境科学等各个重要领域,并取得了长足的发展。本文对近些年国内外所取得的钼同位素研究成果进行了系统整理、总结,并对钼同位素的应用潜力进行了概括性的综述,主要包括钼元素及其同位素的地球化学特征、钼同位素分析测试技术、钼同位素的分馏机制、不同地球化学储库的钼同位素组成、成矿作用过程中钼同位素组成的变化特征及其在矿床中的应用。以期让更多人了解钼同位素这一非传统稳定同位素的最新研究进展,进一步探索成矿作用过程中钼同位素的组成特征、分馏机制和影响因素等,并有效推动钼同位素地球化学在成矿作用研究方面的应用。 展开更多
关键词 钼同位素 分馏机制 储库 成矿作用
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Control factors of reservoir oil-bearing difference of Cretaceous Mishrif Formation in the H oilfield, Iraq 预览
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作者 ZHAO Limin ZHOU Wen +3 位作者 ZHONG Yuan GUO Rui JIN Zhimin CHEN Yantao 《石油勘探与开发:英文版》 2019年第2期314-323,共10页
To reveal the law of oiliness of the Upper Cretaceous carbonate reservoirs in the Middle East and factors controlling the oiliness, the Mishrif Formation of the H oilfield in Iraq was examined comprehensively. Based o... To reveal the law of oiliness of the Upper Cretaceous carbonate reservoirs in the Middle East and factors controlling the oiliness, the Mishrif Formation of the H oilfield in Iraq was examined comprehensively. Based on core observation and description, casting thin section analysis, and statistics of physical property and pore-throat structure parameter, etc., in combination with previous achievements and understanding, it is pointed out that the coring interval of Mishrif Formation has strong oiliness heterogeneity, and can be divided into 4 grades, oil rich, oil immersed, oil spot, and oil trace;the oil-bearing grade has obvious facies-controlled characteristic in macroscopic view;and in different oil-bearing grades, relatively oil-rich sections present higher karst development intensity, better physical properties and pore-throat structure characteristics. It is concluded through the study that the sedimentary microenvironment and eogenetic karstification determine the macroscopic oiliness of the reservoir in Mishrif Formation of H Oilfield, and the improvement of pore-throat structure caused by eogenetic karstification is the decisive factor of the micro oil-bearing difference of the reservoir. Finally,the genetic model of reservoir development and oil-bearing difference was established. 展开更多
关键词 carbonate RESERVOIRS eogenetic KARSTIFICATION RESERVOIR oiliness Mishrif FORMATION Upper CRETACEOUS Iraq
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Carbonate pore type characterization using a statistical inversion method 预览
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作者 LI Bonan 《世界地质:英文版》 2019年第1期21-28,共8页
For carbonate reservoirs, vertical pore type heterogeneity records regional depositional history. However, from the geophysics point of view, these microscopic characteristics cannot be described with conventional dat... For carbonate reservoirs, vertical pore type heterogeneity records regional depositional history. However, from the geophysics point of view, these microscopic characteristics cannot be described with conventional data-driven approaches. The author presents an upscale rock physics model which includes both modeling and inverting schemes in this study. According to the statistical comparability between lab measurements and well logs, the main idea is to study and utilize inherent statistical features in naturally occurred carbonate rocks. Firstly, using the critical porosity model as rock physical theory, relationships are built between pore structures and elastic responses. Furthermore, in logging data scale, key parameters are estimated through a statistical method, and thus pore types are classified. The methodology is successfully applied in the well YS1. It is believed that this method will be a promising tool on handing pore complexity and inversion uncertainty in carbonate reservoir exploration. 展开更多
关键词 CARBONATE RESERVOIRS rock PHYSICS modeling critical POROSITY BAYESIAN estimation
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浙江水源地水库浮游动物丰度和生物量与水质参数的通径分析 预览
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作者 李共国 徐杭英 +2 位作者 于海燕 俞建 韩明春 《水生生物学报》 CAS CSCD 北大核心 2019年第1期165-172,共8页
为探明浙江水源地水库浮游动物群落特征及与环境因子的关系,达到用浮游动物群落参数监测水源地水库水质的目的。于2014年1月至2016年10月,对10个饮用水源地水库(K1—K10)展开了水质参数、浮游动物丰度和生物量的季节调查。采用多元逐步... 为探明浙江水源地水库浮游动物群落特征及与环境因子的关系,达到用浮游动物群落参数监测水源地水库水质的目的。于2014年1月至2016年10月,对10个饮用水源地水库(K1—K10)展开了水质参数、浮游动物丰度和生物量的季节调查。采用多元逐步回归与通径分析的方法,研究了浙江水源地水库环境因子与浮游动物群落之间的相互关系和作用过程。结果表明,2014—2016年水库浮游动物平均密度97.5ind./L,主要由桡足类无节幼体(占36.3%)、轮虫(28.4%)和剑水蚤(20.0%)组成。平均生物量289.3μg/L,主要由枝角类(占39.3%)、剑水蚤(29.0%)和哲水蚤(14.5%)组成。Chl.a含量是春、夏季水库浮游动物丰度的决策因子,TP含量是秋、冬季群落丰度波动的限制因子,春季TN通过N﹕P比率影响群落丰度。DO含量是冬季和夏季水库浮游动物生物量发展的决策因子,冬季DO通过降低N﹕P比促进群落生物量发展。水库浮游动物现存量受到了TP含量消长、N﹕P比率变化,以及最终反映的水体Chl.a含量共同影响。 展开更多
关键词 水库 浮游动物 丰度 生物量 水质参数 通径分析
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Characteristics of Tight Sandstone Reservoirs and Controls of Reservoir Quality:A Case Study of He 8 Sandstones in the Linxing Area,Eastern Ordos Basin,China 预览
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作者 GAO Xiangdong WANG Yanbin +4 位作者 LI Yong GUO Hui NI Xiaoming WU Xiang ZHAO Shihu 《地质学报:英文版》 SCIE CAS CSCD 2019年第3期637-659,共23页
Determining the process of densification and tectonic evolution of tight sandstone can help to understand the distribution of reservoirs and find relatively high-permeability areas.Based on integrated approaches of th... Determining the process of densification and tectonic evolution of tight sandstone can help to understand the distribution of reservoirs and find relatively high-permeability areas.Based on integrated approaches of thin section,scanning electron microscopy(SEM),cathode luminescence(CL),nuclear magnetic resonance(NMR),X-ray diffraction(XRD),N2 porosity and permeability,micro-resistivity imaging log(MIL)and three-dimensional seismic data analysis,this work discussed the reservoir characteristics of the member 8 of the Permian Xiashihezi Formation(He 8 sandstones)in the Linxing area of eastern Ordos Basin,determined the factors affecting reservoir quality,and revealed the formation mechanism of relatively high-permeability areas.The results show that the He 8 sandstones in the Linxing area are mainly composed of feldspathic litharenites,and are typical tight sandstones(with porosity<10%and permeability<1 mD accounting for 80.3%of the total samples).Rapid burial is the main reason for reservoir densification,which resulted in 61%loss of the primary porosity.In this process,quartz protected the original porosity by resisting compaction.The cementation(including carbonate,clay mineral and siliceous cementation)further densified the sandstone reservoirs,reducing the primary porosity with an average value of 28%.The calcite formed in the eodiagenesis occupied intergranular pores and affected the formation of the secondary pores by preventing the later fluid intrusion,and the Fe-calcite formed in the mesodiagenetic stage densified the sandstones further by filling the residual intergranular pores.The clay minerals show negative effects on reservoir quality,however,the chlorite coatings protected the original porosity by preventing the overgrowth of quartz.The dissolution of feldspars provides extensive intergranular pores which constitute the main pore type,and improves the reservoir quality.The tectonic movements play an important role in improving the reservoir quality.The current tectonic traces of the study area are m 展开更多
关键词 TIGHT gas RESERVOIR quality high-permeability RESERVOIRS Linxing area EASTERN ORDOS Basin
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一种基于油水两相渗流理论的水驱图版的建立与应用 预览
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作者 侯建锋 胡亚斐 +2 位作者 赵辉 林长庆 谢琳 《新疆石油天然气》 CAS 2019年第1期33-37,3共6页
水驱图版是一种重要的油藏工程方法,常用于分析水驱油藏的含水上升规律,评价水驱开发调整效果和预测采收率。目前国内应用比较广泛的童氏图版及其改进水驱图版初期含水率较高,预测采收率偏大,不能适应注水开发油藏特别是低渗透注水开发... 水驱图版是一种重要的油藏工程方法,常用于分析水驱油藏的含水上升规律,评价水驱开发调整效果和预测采收率。目前国内应用比较广泛的童氏图版及其改进水驱图版初期含水率较高,预测采收率偏大,不能适应注水开发油藏特别是低渗透注水开发油藏开发全过程水驱开发效果评价的需要。本文基于油水两相渗流理论,利用相对渗透率资料,推导并提出了一种水驱规律预测模型。在此基础上,建立了一种新型水驱图版。研究和实例应用表明,新型水驱图版客观描述了注水开发油藏开采全过程的含水与采出程度变化规律,可靠性强,适用范围广,对水驱规律和采收率的预测更加客观、准确。 展开更多
关键词 油藏 童氏图版 水驱规律 水驱图版 相对渗透率 含水率 采出程度 采收率
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辽河东部凹陷新生界火成岩岩性、岩相特征和储层控制因素
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作者 张斌 顾国忠 +5 位作者 单俊峰 王璞珺 郭强 徐琛琛 杨帆 陈星州 《吉林大学学报:地球科学版》 CAS CSCD 北大核心 2019年第2期279-293,共15页
基于110口探井1 100m岩心、500余口探井总长107 000m火成岩井段资料,通过岩心观察、岩矿鉴定、物性测试和含油气性分析,研究了辽河坳陷东部凹陷新生界不同层系火成岩岩性、岩相发育特征和储层控制因素。结果显示:本区发育火山岩、侵入... 基于110口探井1 100m岩心、500余口探井总长107 000m火成岩井段资料,通过岩心观察、岩矿鉴定、物性测试和含油气性分析,研究了辽河坳陷东部凹陷新生界不同层系火成岩岩性、岩相发育特征和储层控制因素。结果显示:本区发育火山岩、侵入岩、沉火山碎屑岩3大类16种岩性,其中玄武岩类占91.0%;发育6相16种亚相,其中溢流相占63.0%;发育4类9种储集空间,次生孔隙和次生裂缝占主体。砾-粒间孔隙和裂缝发育的粗面岩类、玄武质火山碎屑(熔)岩和火山口-近火山口相带的侵出相、火山通道相和爆发相是最有利的储集岩性、岩相带。储层主要受岩性、岩相、断裂等多方面控制,岩性决定储集空间类型和储层微观特征,岩相控制储层宏观分布规律,断裂控制岩体分布范围、火山口位置和储层有效性。近油源、靠断裂的优势岩性、岩相带是火成岩油气勘探最有利目标。 展开更多
关键词 辽河坳陷 东部凹陷 新生界 岩相 火成岩 储层 主控因素
Competitive and synergistic adsorption of binary volatile organic compound mixtures on activated carbon
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作者 祝静 詹洪磊 +3 位作者 赵昆 苗昕扬 周琼 岳文正 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第2期106-110,共5页
The adsorption of four substances and their binary mixture is investigated via the terahertz time domain spectroscopy(THz-TDS). The selected unary compound(ethanol, acetone, ethyl acetate, and n-propyl acetate) and bi... The adsorption of four substances and their binary mixture is investigated via the terahertz time domain spectroscopy(THz-TDS). The selected unary compound(ethanol, acetone, ethyl acetate, and n-propyl acetate) and binary mixture(solution 1 is composed of ethanol and acetone, and solution 2 is composed of ethyl acetate and n-propyl acetate) exhibit different adsorption behaviors with varied polarities. In comparison with single component, solution 1 shows shorter adsorption equilibrium time, faster adsorption rate, and stronger adsorption capacity, which conform to a synergistic adsorption mechanism, while the competitive behavior is attributed to the slower adsorption in solution 2. In addition, the pseudo-second-order equation with terahertz parameter is used to assess the rate of binary component organics. The present results indicate a further understanding of multicomponent adsorption mechanisms. 展开更多
关键词 COMPETITIVE ADSORPTION SYNERGISTIC ADSORPTION oil–gas RESERVOIRS terahertz time domain spectroscopy(THz-TDS)
鄂尔多斯盆地南部延长组长7段致密油成藏条件与富集主控因素 预览
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作者 王永炜 李荣西 +3 位作者 王震亮 屈红军 赵谦平 高潮 《西北大学学报:自然科学版》 CAS CSCD 北大核心 2019年第1期144-154,共11页
为评价鄂尔多斯盆地南部延长组长7段致密油的勘探前景,以地化分析测试、场发射扫描电镜、平衡深度法等研究手段,通过对烃源岩、储层、油气运移等方面的研究,深入探究该区长7段致密油各项成藏条件并进行潜力评价。结果表明,该区长7段优... 为评价鄂尔多斯盆地南部延长组长7段致密油的勘探前景,以地化分析测试、场发射扫描电镜、平衡深度法等研究手段,通过对烃源岩、储层、油气运移等方面的研究,深入探究该区长7段致密油各项成藏条件并进行潜力评价。结果表明,该区长7段优质烃源岩分布稳定,生油能力强,且上下邻近砂岩发育,具有良好的源储配置条件;该区致密油藏在早白垩世大规模形成,属于晚期成藏;在形成和聚集过程中主要受沉积微相和物性条件控制;根据评价结果可知,长7 1亚段油层组I类,II类有利区发育较多。研究后认为,长7段致密油藏富集的主控因素有:源储配置是致密油形成的关键因素,各类孔隙发育是致密油富集的重要前提,顶部盖层和侧向遮挡是致密油保存的必要条件。 展开更多
关键词 鄂尔多斯盆地 致密油 成藏条件 烃源岩 储层特征
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Ecological and efficient polyculture Technology of sautéed mochitis mogulis 预览
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作者 Wanjun Zhao 《探索-水产科学与水产养殖》 2019年第1期10-12,共3页
Yunban (Ictalurus Nebraska),Also known as brown catfish,Genus catfish Formolidae,native to North America,is a freshwater breed of the United States.Diet is relatively broad,the meat is fresh and delicious,no muscle sp... Yunban (Ictalurus Nebraska),Also known as brown catfish,Genus catfish Formolidae,native to North America,is a freshwater breed of the United States.Diet is relatively broad,the meat is fresh and delicious,no muscle spines.It is a freshwater fish with high economic value..Oblique jaw (Plagognathops microlepis Bleek-Er),Cyprinidae,subfamily arinae,genus oblique jaw,middle and lower classes economic fishes,GuangzhouThe nutritional level of meat is high,and the market is well received by consumers..The internal quality of the fine-scale oblique jaw is tender and delicious,and the feeding habits are wide,and the feeding is simple and easy.As the mixed-breeding object,the yield per unit area and economic benefit can be improved without increasing the feed..The purpose of this experiment is to raise the microscaly oblique jaw by raising the polychaete Globus,in order to reduce the organic matter pollution and eutrophication degree of aquaculture water,and to reduce the water quality. 展开更多
关键词 Widely distributed RESERVOIRS FINS yellow or yellowish Middle Nitrogen Phosphorus Content in the BREEDING way reduce the occurrence of disease head down only the TAIL is SHAKING
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四川盆地中三叠统雷口坡组天然气勘探的关键地质问题 被引量:1
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作者 刘树根 孙玮 +3 位作者 宋金民 雍自权 王浩 赵聪 《天然气地球科学》 EI CAS CSCD 北大核心 2019年第2期151-167,共17页
基于四川盆地中三叠统雷口坡组的深入研究和油气勘探过程分析,总结了目前有关雷口坡组的基本认识:①烃源复杂且主力烃源层不明确,混源气占多数;②储集层类型多样,既有滩相储层、风化壳岩溶储层,又有微生物岩储层;③储集层层位多,雷一段... 基于四川盆地中三叠统雷口坡组的深入研究和油气勘探过程分析,总结了目前有关雷口坡组的基本认识:①烃源复杂且主力烃源层不明确,混源气占多数;②储集层类型多样,既有滩相储层、风化壳岩溶储层,又有微生物岩储层;③储集层层位多,雷一段、雷三段、雷四段均有优质储层发育,但各段优质储层发育的主控因素和形成机理不清楚;④油气成藏机理复杂,过程不明。据此,提出四川盆地中三叠统雷口坡组天然气勘探的关键地质问题有:①气藏主力烃源岩和输导系统问题;②储层类型、成因和分布问题;③气藏成藏过程和机制问题。只有这些关键地质问题的研究取得较大进展,雷口坡组的勘探才有望发现成片成带的规模性天然气藏。 展开更多
关键词 雷口坡组 烃源岩 储层成因 成藏过程 四川盆地
Optimization of refracturing timing for horizontal wells in tight oil reservoirs: A case study of Cretaceous Qingshankou Formation, Songliao Basin, NE China 预览
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作者 GUO Jianchun TAO Liang ZENG Fanhui 《石油勘探与开发:英文版》 2019年第1期153-162,共10页
Tight oil reservoirs in Songliao Basin were taken as subjects and a novel idealized refracturing well concept was proposed by considering the special parameters of volume fracturing horizontal wells, the refracturing ... Tight oil reservoirs in Songliao Basin were taken as subjects and a novel idealized refracturing well concept was proposed by considering the special parameters of volume fracturing horizontal wells, the refracturing potential of candidate wells were graded and prioritized, and a production prediction model of refracturing considering the stress sensitivity was established using numerical simulation method to sort out the optimal refracturing method and timing. The simulations show that: with the same perforation clusters, the order of fracturing technologies with contribution to productivity from big to small is refracturing between existent fractured sections, orientation diversion inside fractures, extended refracturing, refracturing of existent fractures;and the later the refracturing timing, the shorter the effective time. Based on this, the prediction model of breakdown pressure considering the variation of formation pressure was used to find out the variation pattern of breakdown pressure of different positions at different production time. Through the classification of the breakdown pressure, the times of temporary plugging and diverting and the amount of temporary plugging agent were determined under the optimal refracturing timing. Daily oil production per well increased from 2.3 t/d to 16.5 t/d in the field test. The research results provide important reference for refracturing optimization design of similar tight oil reservoirs. 展开更多
关键词 Songliao Basin tight oil reservoirs REFRACTURING volume FRACTURING breakdown pressure TEMPORARY plugging and diverting
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Iterative static modeling of channelized reservoirs using historymatched facies probability data and rejection of training image
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作者 Kyungbook Lee Sungil Kim +2 位作者 Jonggeun Choe Baehyun Min Hyun Suk Lee 《石油科学:英文版》 SCIE CAS CSCD 2019年第1期127-147,共21页
Most inverse reservoir modeling techniques require many forward simulations, and the posterior models cannot preserve geological features of prior models. This study proposes an iterative static modeling approach that... Most inverse reservoir modeling techniques require many forward simulations, and the posterior models cannot preserve geological features of prior models. This study proposes an iterative static modeling approach that utilizes dynamic data for rejecting an unsuitable training image (TI) among a set of TI candidates and for synthesizing history-matched pseudo-soft data. The proposed method is applied to two cases of channelized reservoirs, which have uncertainty in channel geometry such as direction, amplitude, and width. Distance-based clustering is applied to the initial models in total to select the qualified models efficiently. The mean of the qualified models is employed as a history-matched facies probability map in the next iteration of static models. Also, the most plausible TI is determined among TI candidates by rejecting other TIs during the iteration. The posterior models of the proposed method outperform updated models of ensemble Kalman filter (EnKF) and ensemble smoother (ES) because they describe the true facies connectivity with bimodal distribution and predict oil and water production with a reasonable range of uncertainty. In terms of simulation time, it requires 30 times of forward simulation in history matching, while the EnKF and ES need 9000 times and 200 times, respectively. 展开更多
关键词 History-matched FACIES PROBABILITY map Training image REJECTION ITERATIVE STATIC modeling ? Channelized RESERVOIRS - Multiple-point statistics History matching
北方干旱半干旱城市雨水利用设施的应用 预览
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作者 曹增博 宁国强 韩涛 《建筑技术开发》 2019年第2期98-99,共2页
针对雨水利用设施这种“海绵细胞”终端形式在呼和浩特地区的应用,及伴随应用所产生具有代表性的效益,提出了雨水利用设施在中国北方干旱半干旱城市中适宜的应用方法。结合中国北方干旱半干旱地区特有的地区性及代表性,论述了符合其地... 针对雨水利用设施这种“海绵细胞”终端形式在呼和浩特地区的应用,及伴随应用所产生具有代表性的效益,提出了雨水利用设施在中国北方干旱半干旱城市中适宜的应用方法。结合中国北方干旱半干旱地区特有的地区性及代表性,论述了符合其地域特性的雨水利用设施的应用模式。解决了雨水利用设施积蓄雨水在干旱时期进行雨水利用、滞留雨水、减少地表径流、减小城市内涝发生隐患的问题,同时还兼具净化水体和补充涵养地下水的功能目的。 展开更多
关键词 雨水利用设施 干旱半干旱地区 蓄水池 雨水花园
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Technological progress and prospects of reservoir stimulation 预览
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作者 LEI Qun GUAN Baoshan +7 位作者 CAI Bo WANG Xin XU Yun TONG Zheng WANG Haiyan FU Haifeng LIU Ze WANG Zhen 《石油勘探与开发:英文版》 2019年第3期605-613,共9页
Through reviewing the development history of reservoir hydraulic fracturing technology, this paper demonstrated the latest research progress at home and abroad and summarized six technical gaps between China and the w... Through reviewing the development history of reservoir hydraulic fracturing technology, this paper demonstrated the latest research progress at home and abroad and summarized six technical gaps between China and the world, that is fracture propagation mechanism, fracturing software development, fracturing vehicle equipment, downhole tools temperature and pressure resistance, proppant replacement and big data information database. The technical difficulties include lack of geological-engineering deep integration, unclear factors on horizontal well multi-fracture propagation, difficulty in reducing construction costs, environment protection pressure, lack of new experimental and field test equipment, immature techniques for fracturing fluid, and low efficacy of factorized fracturing equipment. We proposed six suggestions on China’s future reservoir hydraulic fracturing technology:(1) strengthen the mechanism study of unconventional reservoir hydraulic fracturing;(2) accelerate the development of geological-engineering integration software;(3) promote the upgrading of EOR fracturing techniques;(4) carry out low-cost multi-functional fracturing fluid formula experiment;(5) complete high-efficiency fracturing equipment;(6) build big database, informational and remote decision-making system of hydraulic fracturing. 展开更多
关键词 UNCONVENTIONAL RESERVOIRS HYDRAULIC FRACTURING HYDRAULIC FRACTURING equipment HYDRAULIC FRACTURING materials HYDRAULIC FRACTURING design remote DECISION-MAKING TECHNOLOGICAL progress
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