Canopy Temperature Depression as a Potential Selection Criterion for Drought Resistance in Wheat

Field studies were conducted at Bushland, Texas, USA, in 2004 to examine usefulness of canopy temperature depression （CTD）, the difference of air-canopy temperature, in screening wheat （Triticum aestivum L.） genotypes for yield under dryland and irrigated. Forty winter wheat genotypes were grown under irrigation and dryland. CTDs were recorded after heading between 1 330 and 1 530 h on 6 clear days for dryland and 9 days for irrigation. Drought susceptible index （DSI） for each genotype was calculated using mean yield under dryland and irrigated conditions. Genotypes exhibited great differences in CTD under each environment. The dryland CTDs averaged 1.33℃ ranging from -0.67 to 2.57℃, and the average irrigation CTD were 4.59℃ ranging from 3.21 to 5.62℃. A low yield reduction was observed under dryland conditions relative to irrigated conditions for high-CTD genotypes. CTD values were highly negatively correlated with DSI under dryland, and genotypes of CTDs = 1.3℃ in dryland condition were identified as drought resistant. For 21 genotypes classified as drought resistant by DSI, their CTDs were 1.68℃ for dryland and 4.35℃ for irrigation on average; for 19 genotypes classified as drought susceptible by DSI, average CTD was 0.94℃ in dryland and 4.85℃ in irrigation. The high-yield genotypes consistently had high CTD values, and the low-yield ones had low CTD values for all measurements in dryland. After heading, genotypes maintained consistent ranking for CTD. Regression results for CTD and yield suggested that the best time for taking CTD measurement was 3-4 weeks after heading in irrigation but any time before senescence in dryland. Crop water stress index （CWSI） calculated from CTD data was highly correlated with CWSI calculated from yield, which suggesting traditional costly CWSI measurement may be improved by using portable infrared thermometers. Most importantly, grain yield was highly correlated with CTD under dryland （R^2 = 0.79-0.86） and irrigation （R^2 = 0.46-0.58） conditions. These results clearly indicated grain yield and water stress can be predicted by taking CTD values in field, which can be used by breeding programs as a potential selection criterion for grain yield and drought resistance in wheat, but a second study year is needed to confirm further.

INVERSION OF TEMPERATURE FROM AMSU-A AND ITS APPLICATION ON WARM-CORE OF TROPICAL DEPRESSION OVER THE SOUTH CHINA SEA

The linear regression and horizontally stepwise correction are conducted on the observational data from AMSU-A L1 B of NOAA polar orbit satellite to invert a 40-layers(from 1,000 h Pa to 0.1 h Pa) dataset of atmospheric temperature with a horizontal resolution of 0.5°×0.5° after the correction of satellite antenna pattern and limb adjustment. Case study shows that the inversion data of temperature can reveal the detail structure of warm core in tropical cyclone. We choose two categories of tropical depressions(TDs) over the South China Sea, including the non-developing TDs and developing TDs. Both of them are developed downward from the middle and upper level to the lower level. Comparison between the evolutions of warm core in the two categories of TDs indicates that the warm core is developed downward from the middle and upper troposphere to the sea surface in all the downward-developing TDs. The difference is that in the group of further developing TDs, the warm core in the upper troposphere is intensified suddenly when it is extending to the sea surface. The warm core in the upper and lower troposphere is strengthened in a meantime. But the similar feature is not observed in the non-developing TDs. Then it may be helpful to judge the TD development by monitoring the change in its warm-core structure.

Rheological Properties of Waxy Crude at a Low Temperature in the Presence of Pour Point Depressants

Pour point depressants （PPD） are used to improve the theology of waxy crude. The affect of various factors on the theological properties, and the thermal characteristics of waxy crude treated by PPD have been investigated. The conclusions are as follows： PPD can reduce the pour point and abnormal point of waxy crude, broaden the temperature range of Newtonian fluid of waxy crude, and lower greatly the viscosity of non-Newtonian fluid of waxy crude. The influence of reheating and high-rate shear on the effect of PPD mainly depends on their temperature. When the reheating temperature is more than the abnormal point of crude by 10℃, the reheating process has little effect on the modification effect of PPD. However, when the reheating temperature is below the abnormal point of crude, the reheating process will reduce the modification effect of PPD. When temperature is above the abnormal point of crude, the high-rate shear has little effect on the modification effect of PPD. At a temperature range where a lot of wax is precipitating, high-rate shear will greatly reduce the modification effect of PPD.

Characteristics of Oil and Gas Accumulation in Yong'an-Meitai Area of the Fushan Depression,Beibuwan Basin,South China Sea

The Yong＇an-Meitai area is the focus of the present exploration in the Fushan Depression, Beibuwan Basin, South China Sea. All oils from this area are geochemically characterized by higher Pr/Ph ratio, higher proportion of heavy molecular weight hydrocarbons, and higher proportion of C29 regular steranes, which indicate that the organic matter of source rocks might have been deposited in an oxidizing palaeoenvironment and be dominated by higher plant organic matter input. The oil from E3w2 （the second member of Weizhou Fro. of the Oligocene） has a much higher density, relatively higher Pr/nC17 and Ph/nC18 ratios, and a ＂UCM--unresolved complex mixture＂ on gas chromatograms, which indicate that it has been slightly biodegraded. CPI and other terpane and sterane isomer ratios suggest they are all mature oils. The timing of oil charging in E3w2 and E2I1 （the first member of the Liushagang Fro. of the Eocene） determined by the homogenization temperatures of fluid inclusions and thermal evolution history are from 9-3 Ma and 8-3 Ma, respectively. Thus, the interpretation of E3w2 as a secondary reservoir is unlikely. The timing of oil charging is later than that of hydrocarbon generating and expulsion of Liushagang Fin. source rocks and trap formation, which is favorable for oil accumulation in this area. All molecular parameters that are used for tracing oil filling direction decrease with shallower burial depth, which suggests vertical oil migration. The widely occurring faults that penetrate through the source rocks of the Liushagang Fro. may serve as a fine oil charging conduit.

Breakdown characteristics of CF4 and CF4/N2 hybrid gas in refrigeration temperature range

Common insulation gas cannot normally work in refrigeration temperature range(153-243 K), especially in extremely cold regions. To solve this problem, this essay uses cubic equation combined with two-parameter model in theorem of corresponding states to estimate dew-point of hybrid gas. The influence of temperature on mixing ratio is studied by using van der Waals equation. The result shows that the mixing ratio is stable during temperature-fall period. Insulation property of CF_4 and CF_4/N_2 in refrigeration temperature range is studied through self-designed low-temperature test system. The result shows when the density of hybrid gas is invariable, temperature changing has less influence on breakdown voltage, and when the mixing ratio is 20%, CF_4/N_2 is the greatest potential hybrid gas.

Mechanism of Surface Depression on Foam Glass

The mechanism of the surface depression of the foam glass was studied. A method of powder sintering with plate glass as the raw material and carbon black as the foaming agent was adopted to investigate the influences of foaming temperature, soaking time, moisture content in the release agent, and flame preheating temperature on the surface depression of a foam glass blank. The results indicated that insufficient cooling rate and rapid foaming process that could not react synergistically with the surface tension and viscosity of the glass melt aroused the mismatching between the glass melt and the expansion or contraction of gas, resulting in upper surface depression of foam glass. Besides, the batch carbon black at high temperature reacted with residual water in advance to generate large amounts of gas and form the air space which could expand inside, leading to lower surface depression of foam glass.

二十四节气的温湿指数与抑郁症的相关性研究

背景全球抑郁症患者已突破3亿人次,其高致残率引起世界广泛关注。目前温湿指数(Humidex)与抑郁症之间关系的研究较少。目的探讨二十四节气的Humidex与抑郁症之间的关系。方法收集上海市嘉定区精神卫生中心精神科2016-10-08—2019-10-07抑郁症患者的就诊资料(n=18289),包括性别、年龄、就诊时间、就诊门诊及专家门诊数量。通过上海市气象局公布数据收集嘉定区2016-10-08—2019-10-07日均温度、相对湿度、降雨量、气压和平均风速数据,计算Humidex。将患者依据不同年龄分为≤18岁组(n=157)、19~44岁组(n=3099)、45~59岁组(n=4848)、60~74岁组(n=6270)和≥75岁组(n=3915)。通过结合类Poisson分布和分布滞后非线性模型估计二十四节气的Humidex与抑郁症之间的关系。运用Pearson相关性分析计算Humidex和气象变量之间的相关性。以中位Humidex作为对照,计算二十四节气的Humidex和抑郁症的相对风险度(RR)。结果2016-10-08—2019-10-07共纳入抑郁症患者18289人次,男6900人次,女11389人次。2016-10-08—2017-10-07小寒节气对应的平均Humidex最低,抑郁症患者数最多;大暑节气对应的平均Humidex最高,抑郁症患者数最少。2017-10-08—2018-10-07大寒节气对应的平均Humidex最低,抑郁症患者数最多;大暑节气对应的平均Humidex最高,抑郁症患者数最少。2018-10-08—2019-10-07大寒节气对应的平均Humidex最低,抑郁症患者数最多;大暑节气对应的平均Humidex最高,抑郁症患者数最少。二十四节气的Humidex与总人群抑郁症风险呈非线性关系。2016-10-08—2019-10-07总人群、男性、女性、≤18岁、19~44岁、45~59岁、60~74岁和≥75岁抑郁症风险分布前2位Humidex对应的节气分别为大寒、立春,抑郁症风险分布最低Humidex对应的节气为大暑。抑郁症总人群在大寒、立春节气后第10天出现最大滞后效应(RR=1.020,95%CI=1.001~1.040),在大暑节气后第8天出现滞后效应,持续至第9天。60~74岁年龄组人群在大寒、立春节气后第7天出现滞后效应,第9天出现最大滞后效应(RR=1.054,95%CI=1.007~1.104),持续至第11天。男性抑郁症人群在大暑节气后第1天和第8天出现滞后效应,分别持续至第2天和第10天,于第10天出现最大滞后效应(RR=0.952,95%CI=0.911~0.994);60~74岁年龄组人群在大暑节气后第8天出现滞后效应,持续至第9天。结论大寒、立春节气的Humidex是抑郁症的危险因素,临床上应根据不同节气的Humidex,对抑郁症患者人群做到精准诊疗,制订个体化的干预方案。

孕期环境温度暴露与孕妇焦虑及抑郁症状的关联研究

目的探讨不同孕期温度和温湿度指数暴露对孕妇焦虑、抑郁的影响。方法2017年6月至2020年12月在广州市番禺区妇幼保健院(何贤纪念医院)开展前瞻性队列研究。采用问卷收集孕妇基本情况,采用焦虑自评量表(SAS)及抑郁自评量表(SDS)对孕妇进行心理评估。同时收集研究期间气象数据并计算温湿度指数,采用多重线性回归模型和Logistic回归模型分别评估不同孕期温度及温湿度指数与SAS和SDS得分,以及焦虑和抑郁状态的关联。结果纳入研究的孕妇共5553例,孕早期、孕中期、孕晚期完成焦虑自评者分别为2497、2709、857名,焦虑检出率分别为13.1%、8.9%、10.3%;完成抑郁自评者分别为2554、2784、863名,抑郁检出率分别为27.2%、19.3%、18.9%。回归模型结果显示,在孕中期,调查前1周、2周、1月的环境平均温度每升高5℃,SAS标准分(95%CI)分别降低0.61(-1.08,-0.13)、0.70(-1.24,-0.16)、0.75(-1.44,-0.07)分;焦虑发生风险OR(95%CI)分别为0.71(0.56,0.91)、0.61(0.46,0.81)、0.55(0.38,0.79)。以温湿度指数为暴露指标时观察到相似的结果。按调查季节分层分析发现,冷季温度及温湿度指数升高与孕中期焦虑发生风险降低有关,暖季温度及温湿度指数升高与抑郁发生风险降低有关。结论孕期温度暴露与焦虑、抑郁症状的发生有关,这种关联在不同季节存在差异。

松辽盆地中央坳陷及邻区三维地热地质建模与地热资源靶区优选

三维地热地质建模能够直观反映地质体温度场分布格局,有助于圈定地热资源有利靶区。本文利用地球物理及钻孔资料、岩石热物性数据对松辽盆地中央坳陷区进行三维地质建模及温度场模拟,通过钻孔测温和实测大地热流数据,验证了地热地质模型的可靠性。结果表明,中央坳陷在1.0~4.0 km深度的温度分别为30.3℃~62.8℃、68.2℃~120.2℃、110.5℃~166.7℃、158.4℃~214.2℃。4.0 km深度内地温梯度介于36.9℃/km~57.4℃/km之间,平均地温梯度为48.4℃/km。嫩江组、姚家组二段—三段、青山口组二段—三段和泉三段—四段4套主力热储底板温度分别介于15.8℃~71.4℃、23.6℃~88.6℃、31.8℃~107.4℃和48.9℃~133.4℃,其中华字井阶地、大庆长垣、宾县王府凹陷为热储温度高值区。研究区现今地温场主要受基底起伏的控制,基底和沉积层热导率的差异引起的热流“折射”效应促进了浅部热量的再分配,形成了凹凸相间的地温场分布格局;此外,断裂构造对地温场高异常区的分布也有显著影响。结合热源、通道和储盖组合特征,圈定大庆长垣中部地区泉头组三段—四段为松辽盆地中央坳陷地热资源开发有利靶区。

青藏高原南羌塘坳陷白垩纪以来的隆升剥蚀历史——来自低温热年代学的约束

为了重建青藏高原的形成过程和评价羌塘盆地油气的保存条件,对南羌塘坳陷隆升剥蚀历史进行了研究。利用锆石和磷灰石(U-Th)/He和磷灰石裂变径迹技术,对南羌塘坳陷中部嘎尔敖包地区的侏罗系砂岩样品进行了分析,数据显示大部分颗粒经历完全退火阶段;基于实验数据对盆地热史进行反演,并结合区域低温热年代学研究,认为南羌塘坳陷共经历了3期隆升剥蚀历史,即早白垩世、古新世—始新世和中新世以来,分别造成了南羌塘坳陷中部地区1.7~2.6 km、1.89 km和1.13 km的剥蚀量。热历史结果显示,早白垩世南羌塘坳陷中部地区首先遭受剥蚀,随后剥蚀逐渐向南、北两侧传递。南羌塘坳陷第一期冷却历史可能受到羌塘地体和拉萨地体碰撞的影响;第二期冷却历史可能受到印度—亚洲大陆碰撞的影响;第三期冷却历史可能与印度—亚洲大陆持续会聚下羌塘盆地发育大量近南北向断层有关。南羌塘坳陷中部地区位于不同构造位置的样品的热历史显示,其经历了不同的剥蚀过程,这可能受到印度—亚洲大陆的碰撞和随后持续会聚造成的区域性近南北向断裂差异性活动的影响。基于不同构造位置样品热历史的差异性,认为区域性南北向断裂开始活动时间为65~45 Ma。

基于四季抑郁症患者的神经递质变化探讨“天人相应”生物学内涵

目的:观察季节变化对单胺类神经递质的影响,以探讨中医“天人相应”理论的生物学内涵。方法:将65例抑郁组患者以及40例正常组健康人纳入研究。比较四季5-羟色胺(5-HT)、去甲肾上腺素(NE)、多巴胺(DA)的水平。搜集四季气象资料,探讨上述四季单胺类神经递质分泌水平与气象因子的相关性。结果:正常组不同神经递质5-HT、DA、NE的四季整体分泌水平分别呈冬季<秋季<春季<夏季、秋季<冬季<夏季<春季、秋季<冬季<春季<夏季的趋势;抑郁组5-HT抑郁组四季分泌水平之间比较差异无统计学意义(P>0.05),抑郁组DA、NE的四季分泌趋势分别为春季<夏季<秋季<冬季、冬季<秋季<春季<夏季。其次,与正常组比较,四季的抑郁组5-HT、NE水平显著降低;春季、夏季的抑郁组DA水平显著降低,秋季、冬季的抑郁组DA水平显著升高。气象因子与单胺类神经递质的相关性主要体现在四季的日照时数、最低气压以及平均最高气温。结论:正常组和抑郁组的血清神经递质存在不同的季节性变化趋势,四季气象因子对人体情绪相关的单胺类神经递质的变化的影响,可能是“天人相应”理论的生物学基础之一。

库车坳陷深层盐下白垩系储集层氯盐分布模式及意义

库车坳陷克拉苏构造带盐下白垩系巴什基奇克组储集层分布了一批高产、稳产的天然气藏群,其储集层为超深、高温、超压致密砂岩储集层,孔隙度越高,氯盐含量越高,储集层视电阻率越低,储集层中氯盐的分布严重影响流体识别,其对盐下致密砂岩物性的影响较明显。利用岩心观察、铸体薄片、扫描电镜、氯盐含量、常规测井曲线分析等,系统分析了库车坳陷盐下白垩系巴什基奇克组储集层氯盐的分布特征。根据氯盐含量、电阻率、氯盐来源等的差异,提出盐下储集层氯盐分布具有顶渗、侧渗和局部封存3种模式。顶渗模式与侧渗模式的电阻率仅受氯盐含量的影响,顶渗模式储集层氯盐含量呈垂向分带特征,随氯盐含量的降低,电阻率升高;侧渗模式储集层氯盐含量呈横向分带特征,电阻率自构造带边缘向中心表现出由高到低再升高的趋势;局部封存模式电阻率受应力和氯盐含量的共同影响,氯盐含量分布具有偶发性,电阻率变化幅度大。根据测井响应特征划分了各模式的分布段序列,顶渗模式自上而下发育盐层段、泥岩封隔段、饱和氯盐强影响段、未饱和氯盐强影响段、未饱和氯盐影响过渡段和氯盐未影响段;侧渗模式在顶渗模式基础上多发育过饱和氯盐影响段;局部封存模式从上到下划分为盐层段、泥岩封隔段、强挤压应力氯盐未影响段、氯盐应力混合影响段和氯盐应力未影响段。

辐射制冷技术在夏热冬冷地区的应用潜力分析:以杭州为例

为探究辐射制冷在以杭州为代表的常年高湿度的我国夏热冬冷地区的应用潜力,本文基于选择性独立法估算并分析了相对湿度对辐射制冷潜能的影响。计算结果表明,温度的升高及相对湿度的增加会显著降低辐射制冷技术的潜力,其中相对湿度的影响更为明显。杭州在近二十年来的最差工况下平均黑体辐射降温功率可达47 W/m^(2),平均天空温降约为8℃,在典型年的春秋两季具有良好的制冷潜力,辐射制冷技术可作为过渡季节的降温补偿工具。因此,辐射制冷技术在杭州等夏热冬冷地区具有一定的应用前景。

差温顺序输送高凝原油输送工艺设计

根据油品物性,对高凝原油1#原油进行降凝剂试验,通过软件模拟分析差温顺序输送高凝原油过程中的流动特性和传热特性。结果表明:差温顺序输送1#高凝原油时应采用加降凝剂输送工艺,当降凝剂浓度为800ppm时,1#原油凝点可降至36℃;差温顺序输送两种油品时,末站进站温度应高于41℃;投产期间,一个输送批次时间为3.5 d,顺序输送1#原油初期需采用加降凝剂输送工艺;设计流量下,一个输送批次时间为3.0 d,顺序输送1#原油是否采用加降凝剂输送工艺的临界地温为12℃。

基于专利计量的中美低温流动改进剂技术发展现状及关键技术分析

低温流动改进剂是一种广泛应用于能源行业的化学添加剂,旨在改善燃料在低温环境下的流动性能。笔者基于专利文献计量的方法,对中美两国低温流动改进剂的发展现状和关键技术进行了分析。研究发现,中美两国在低温流动改进剂领域都取得了显著的研究成果,但存在一些差异。美国在低温流动改进剂的研究方面更加注重基础理论和实验研究,而中国则更加注重应用技术和工程实践。通过对专利文献的分析,笔者总结了中美两国低温流动改进剂的关键技术,并提出了未来发展的建议。

基于DTS的岩溶洼地渗漏室内试验研究

岩溶洼地是修建水库的理想场所,但岩溶洼地多位于岩溶强发育区,存在岩溶渗漏难题。在各种渗漏监测方法中,分布式光纤温度传感技术(DTS)有着显著优势。通过分析两类光缆在相同渗漏条件下的温度表现规律、不同介质和加热功率下可加热型光缆的温度特征值、可加热型光缆的渗漏感知范围,验证将加热光缆沿PVC管螺旋缠绕工艺提高渗漏感知能力的效果。研究成果可为DTS在岩溶洼地渗漏监测的应用提供参考。

基于露点降估算的APU电子控制系统设计

为了实现商用车电控空气处理系统闭环精确控制、使系统的安全性和经济性得到改善,在商用车空气处理系统中引入了温湿度传感器。根据温湿度和压力数据,经Vogel-Tamma-Fulcher(VTF)方程实现了对高压露点降(DPD)的实时计算和监测。在此基础上,设计了一种适用于底盘域控制器或整车控制器的商用车空气处理单元(APU)电子控制系统。试验结果显示,在中国重型商用车瞬态循环(C-WTVC)工况下使用该系统可以有效降低再生率约4%,商用车空气处理系统的空气压缩机负荷率降低约3%。在APU电控系统中引入露点估算,实现了对空气处理系统DPD的实时监控和稳定控制,提升了系统安全性、降低了空气压缩机负荷。

岩石热导率校正对大地热流计算值的影响——以渤海湾盆地冀中坳陷为例

岩石热导率是计算大地热流的基础热物性参数,热导率的选取和校正是正确评估热流的基础。当前在冀中坳陷乃至渤海湾盆地的大地热流计算中,多以受季节性气温变化和地下水活动等因素影响较小的古近系和新近系砂泥质岩层作为大地热流的计算层位,岩石热导率也多参考区域内已有定值,而忽略了热导率对水饱和度、温度和压力的依赖性。笔者等从岩石热导率的温压校正和饱水校正角度出发,计算并比较了不同校正方法对热流值的影响。主要认识如下:(1)岩石热导率作为1个受多因素综合影响的热物性参数,其大小与岩性和矿物组分密切相关,同时通常与孔隙率呈负相关,而与密度呈正相关;(2)热导率高温实验结果显示,冀中坳陷砂岩样品热导率总体上随温度的升高而降低,在30~130℃的温度区间热导率降低了6.8%~11.3%,热导率下降率具有随热导率的降低而减小的趋势;由于砂岩和泥岩具有相对较浅的埋深和较低的原位温压条件,温压对热导率的正负效应可以在一定程度上相互抵消,对于热导率小于2 W/(m·K)的样品,温压对其的影响较小。(3)饱水校正后的冀中坳陷JZ03井和JZ04井古近系—新近系砂泥岩热导率的平均偏差分别高达43.0%、47.5%;(4)JZ03井和JZ04井古近系—新近系岩层热导率在未经任何校正、经含水率校正及经孔隙率校正情况下的大地热流值分别为43.05 mW/m^(2)、45.39 mW/m^(2)、61.64 mW/m^(2)和52.81 mW/m^(2)、59.81 mW/m^(2)、78.14 mW/m^(2);最终选取经几何平均模型饱水校正后的热导率计算得到的61.64 mW/m^(2)和78.14 mW/m^(2)两个热流值分别作为冀中坳陷牛北斜坡和高阳低凸起中部的大地热流值。

降雨对岩溶峰丛洼地不同地貌部位土壤水分及温度的影响研究

土壤水热因子是影响岩溶区植被恢复、生态修复和水土保持等的主要因素,降雨变化是限制土壤温度和水分变化的一个重要因素,因此在典型峰丛洼地不同地貌部位选择监测点,对不同降雨条件及20、50、80、110 cm深度土壤温度和水分进行连续监测,探讨峰丛洼地区降雨变化对土壤水分和温度的影响机制及其两者耦合关系。结果表明:随土层深度增加土壤水分变异系数增大,土壤温度变化幅度减小。洼地土壤水分对不同条件下的降雨均有响应,但坡地土壤水分对中雨以上级别的降雨发生降雨响应,且坡地土壤水分响应程度较洼地土壤水分强烈。土壤温度日变化特征仅存在于小雨或中雨,大雨或暴雨时,其变化呈现逐渐下降的趋势。土壤水分和温度的相关性在洼地和坡地呈相反的变化。

济阳坳陷缓坡带页岩油储层微观孔隙结构及分形特征

页岩孔隙主要为微—纳米级孔,其微观孔隙结构及分形特征对页岩油储层评价至关重要。通过岩心和薄片观察、X衍射全岩矿物分析和低温氮气吸附-脱附实验等方法,定量表征了济阳坳陷缓坡带陆相页岩油储层的微观孔隙结构和分形特征。结果表明:济阳坳陷缓坡带主要发育碳酸盐质页岩、混合碳酸盐质页岩、含硅灰质页岩、含灰(硅)混合质页岩等4种岩相类型。低温氮气吸附-脱附曲线主要呈现为Ⅳ类,发育4种迟滞回线类型。选取多层吸附区域氮气吸附数据,计算分形维数,页岩样品分形维数介于2.4106~2.6160,平均为2.5275,页岩样品孔隙结构整体复杂,粗糙程度中等偏高,非均质性较强。页岩的有机质丰度变化主要受陆源碎屑质量分数的影响。分形维数与比表面积和平均孔径关系密切,页岩比表面积和平均孔径越小,分形维数越大。页岩孔隙结构特征多与页岩层理的发育程度密切相关,纹层状页岩具有更大的平均孔径、更好的孔隙结构及更弱的非均质性。