塔里木盆地塔中低凸起中古43井区碳酸盐岩油气属性分布特征及成藏模式     

汪文基  韩杰  庞雄奇  潘文庆  吴美珍  张敏 《海相油气地质》2012,17(4):57-62

塔中地区中古44和中古10两条走滑断裂切割了塔中低凸起中古43井区,它们对油气输导具有控制意义。油气从中—下寒武统沿两条走滑断裂向上运移后,在下奥陶统鹰山组内向两侧输导,呈"T"字形的油气充注方式。从断裂向两侧,V/Ni值呈减小趋势,原油密度、黏度、含硫量和含蜡量等物性参数,距离断裂由近到远,均表现为逐渐变大的趋势,这些都证明油气是由走滑断裂向两侧运移的。水、油、气井的目的层海拔分别为-4 700 m以下、约-4 600～-4 500 m和-4 500 m以上;出油气层位在海拔-4500 m以上的井,平均气油比较高,在海拔-4 500 m以下的井,平均气油比较低。研究井区油气开发的连通半径平均约600 m,小于油气成藏的连通半径。在开发和成藏两种时间尺度下隔挡层的物性上限有着显著差别。  相似文献   

德宏州芒市2014年“7·21”暴雨洪灾分析          下载免费PDF全文

张正强  叶新明  李月清  杨丽萍  孙涛 《水文》2016,36(2):92-95

2014年7月受第九号超强台风"威马逊"残余云系影响,德宏州各县市普遍遭到暴雨袭击,伊洛瓦底江和怒江流域发生了特大暴雨洪水,特别严重的是21日6:00,芒市芒海镇发生特大山洪、滑坡、泥石流灾害。分析本次暴雨洪水的雨量、暴雨特性及灾害特征,有助于掌握和了解该地区暴雨洪水的特性,为防洪减灾、防御自然灾害[1]提供依据。  相似文献   

Risk prediction of low temperature in Nanjing city based on grey weighted Markov model   总被引：1，自引：0，他引：1  

Zaiwu Gong  Caiqin Chen  Xinming Ge 《Natural Hazards》2014,71(2):1159-1180

In this research, we calculate the days whose temperature is less than or equal to ?5 °C in a year according to the data of the daily minimum temperature in Nanjing city (China) from 1951 to 2011, divide these days into 6 categories according to the number (one, two, three, four, five, six and above) of consecutive low-temperature days, and introduce a annual low-temperature weighted index series. We divide the 61 annual low-temperature weighted indexes of 1951–2011 into five states using the mean standard deviation method. Based on the observation sequence of state of low-temperature in 1951–2009, we simulate the real low-temperature states of 2010 and 2011 by employing both weighted Markov method and grey weighted Markov method. The results of both methods show that the values of simulation (predicted) state agree with those of real state. Based on the state series of low temperature in 1951–2011, we predict the future state of low temperature of Nanjing city in 2012 by utilizing both weighted Markov method and grey weighted Markov method. It is found that the risk of low temperature belongs to the third state when we use weighted Markov method; however, the risk of low temperature belongs to the second state when we use the latter method. Although the states of the risk of low temperature are different because they are predicted by different methods, the two states illustrate that the risk of low temperature of Nanjing city in 2012 is in a normal situation.  相似文献   

水泥生产碳排放的产生环节及减排措施     

逄思宇  曹烨 《化工矿产地质》2014,(4):250-254

在工业生产过程中,CO2的大量排放被认为是导致气候变暖的重要因素之一,因此控制和减少CO2排放已成为人类社会面临的紧迫任务。水泥工业是人为排放CO2的重要来源之一,这就意味着水泥工业会在一种不断增加的管理压力下减少CO2的排放量,以应对全球变暖的现状。水泥生产过程中CO2的直接排放和间接排放两大排放途径,直接排放主要包括碳酸盐分解,烧成燃料/非烧成燃料的燃烧。间接排放主要是指电力消耗所产生的CO2。针对碳的排放环节,有效可行的CO2减排措施,例如原料、燃料的替代,熟料化学成分的改变,能源效率的提高等,对我国水泥工业的碳减排提出一些建议和看法。  相似文献   

Lateral Migration of Petroleum in the Jurassic Toutunhe Formation in the Fudong Slope,Junggar Basin,China     

Junqing Chen  Zhenxue Jiang  Hong Pang  Xiongqi Pang 《Resource Geology》2014,64(1):35-46

New oil reservoirs have been discovered recently in the Jurassic Toutunhe Formation in the Fudong slope, Junggar basin in China. The process and mechanism of lateral petroleum migration in the Jurassic System in the Fudong slope was investigated based on the geological analysis of the strata, porosity and permeability of the reservoir rocks and geochemistry on oil–source correlation and oil–oil correlation. The results indicate that hydrocarbons of the Toutunhe Formation were primarily derived from the Middle–Lower Jurassic and Middle Permian source rocks of the western Fukang Depression and migrated along the axis from west to east. The thickness, sand/strata ratio, porosity and permeability of the Toutunhe 2 member are all better than that of the Toutunhe 1 member, making it the main carrier bed of the hydrocarbons lateral migration.  相似文献   

南海典型珊瑚礁生态系统健康评价方法研究     

吴莹莹  雷新明  黄晖  张浴阳  丁德文 《热带海洋学报》2021,40(4):84-97

本研究基于系统复杂性原理, 提出了南海典型珊瑚礁生态系统健康评价方法——组织力及系统功能评价法。该方法的评价框架包括珊瑚礁生态系统结构及功能、珊瑚礁生态系统与其他海洋生态系统间关系、与人类社会生态系统间关系、珊瑚礁生态系统发展制约因素等四大模块; 评价指标体系分为目标层、准则层、因素层、要素层等6个层级共计67个指标。同时, 本研究系统地提出了珊瑚礁生态系统健康评价的流程, 提高了珊瑚礁健康评价工作的规范性和时效性。应用组织力及系统功能评价法对2011—2018年西沙群岛珊瑚礁生态系统进行了健康评价, 结果显示自2011年起健康指数年均下降2.3%~2.4%, 除2012年、2015年健康指数稍有回升外, 其余年份均呈下降走势, 整体评价为亚健康状态。根据七连屿周边岛屿的实地考察和居民生活问卷调查结果, 2006—2008年的渔业发展、2012年的海星泛滥和2014—2015年的岛礁建设均对珊瑚礁生态系统造成了较大影响, 使10年内渔业产量下降了50%~80%。这与应用组织力及系统功能评价法的评价结果相吻合, 侧面验证了该评价方法的科学性和可行性。  相似文献   

荣成湾毗邻海域浮游动物群落季节分布特征   总被引：2，自引：0，他引：2  

刘萍  宋洪军  傅明珠  王晓  张学雷  蒲新明 《海洋学报》2013,35(4):168-175

利用2009年度4个季度月的现场调查资料研究了荣成湾毗邻海域浮游动物群落的季节分布特征。研究表明, 在荣成湾毗邻海域出现的浮游动物共59个种类, 秋季、夏季和春季浮游动物均为30种以上(依次为38种、35种和32种), 而冬季种类数相对较少(22种)。浮游动物优势种主要为强壮箭虫(Aidanosagitta crassa)、中华哲水蚤(Calanus sinicus)、小拟哲水蚤(Paracalanus parvus)和拟长腹剑水蚤(Oithona similis)等种类, 其个体丰度的空间和季节分布特征差异较大。浮游动物湿重生物量冬季最高(433.8 mg/m3), 春季(220.7 mg/m3)和秋季(162.4 mg/m3)次之, 而夏季(52.5 mg/m3)相对较低。浮游动物群落物种多样性指数H′年平均值为2.50, 均匀性指数J′年平均值为0.65, 季节比较上, 夏季浮游动物多样性和均匀度均较高, 而春季多样性和均匀性平均值为低值, 且最大值和最小值之间波动范围较大。进一步分析显示, 湾内的筏架养殖对浮游动物群落的分布有显著影响。  相似文献   

Cenozoic sedimentary evolution of deepwater sags in the Pearl River Mouth Basin, northern South China Sea   总被引：2，自引：0，他引：2  

Hui Xie  Di Zhou  Xiong Pang  Yuanping Li  Xiangjie Wu  Ning Qiu  Pengchun Li  Guanghao Chen 《Marine Geophysical Researches》2013,34(3-4):159-173

Recent exploration revealed the high potential for hydrocarbon in the deepwater sags, Pearl River Mouth Basin, northern South China Sea. This paper reports its Cenozoic sedimentary evolution through backstripping of high precision depth data of interpreted sequence boundaries. Local backstripping parameters were mapped based on well and geophysical data. Sensitivity analysis indicates that the reliability of decompaction results were largely improved by using the local porosity parameters and the lithological parameters that vary with grid nodes. Maps of sedimentation rates of 17 sequences from 65 Ma to the present were constructed, showing the spatial–temporal variation of the sedimentation rate. Three rapid depositional stages, 65–32, 29–23.3, 18.5–10.5 Ma, and three slow depositional stages, 32–29, 23.3–18.5, 10.5–0 Ma, were identified with abrupt changes of sedimentary patterns. The three rapid depositional stages were in accord with syn-rifting stage, the first post-rifting depositional stage, and the second post-rifting depositional stage, respectively. And the three slow depositional stages were in keeping with three tectonic events respectively. Several significant sedimentary discontinuities at 32, 23.3 and 10.5 Ma were observed and discussed. The comparison between the study area and the ODP Site 1148 at 32–23.3 Ma indicates that before ~29 Ma the ODP Site 1148 was at similar sedimentation regime as that in the Baiyun and Liwan sags, but significant diversity appeared after ~29 Ma, when a large quantity of terrigenous sediments was trapped by strong post-rifting subsidence in the Baiyun and Liwan sags and could not reach the lower slope areas. Study revealed that the most rapid accumulation from 18.5 to 17.5 Ma might be mainly owing to the large sediment supply during this strong monsoon period.  相似文献   

辽宁红阳煤田石炭—二叠纪聚煤期古地理与控煤分析     

张新福  逄礡  马金利  周效志 《中国煤炭地质》2010,(7):1-6,15

依据华北地台晚古生代陆表海沉积建造层序界面的识别标志,在红阳煤田石炭—二叠系残余地层中识别出了6个层序界面,并据此建立了由DS1-DS55个三级层序构成的层序地层格架,揭示了红阳煤田石炭—二叠纪沉积环境由海相到陆相演化的过程。DS1-DS5层序地层岩性岩相分析表明:DS2、DS3层序是石炭—二叠纪主要聚煤期。DS2层序发育堡岛体系,岛后泥炭坪与滨岸沼泽相沉积在区内形成了厚度较大且连续性较好的12、13煤;DS3层序发育三角洲体系,泛滥盆地与分流间湾相沉积发育了多层不可采或局部可采煤层。与DS3层序海陆过渡相沉积成煤相比,DS2层序海相沉积煤层的灰分与硫分相对较高,且在区域上都呈现由北向南逐渐升高的趋势,这与海水退出红阳煤田的方向相吻合,表明红阳煤田石炭—二叠纪聚煤期古地理格局对煤层发育及煤质特征具有明显的控制作用。  相似文献   

东北地区中生代岩石圈减薄时间上限的厘定:来自松辽盆地营城组火山岩年代学约束   总被引：1，自引：0，他引：1  

徐岩  陈汉林  章凤奇  董传万  余星  肖骏  庞彦明  舒萍  丁日新 《地质科学》2010,45(1)

松辽盆地是我国东北地区一个大型的晚中生代含油气沉积盆地。在盆地发育早期阶段受强烈伸展作用影响形成了大规模的断陷和大量的火山活动。本文以松辽盆地北部徐家围子断陷区火山岩的年代学研究为切入点,通过对徐家围子断陷升深更2井和徐深9-2井营城组(K_1y)火山岩的岩芯样品进行SHRIMP U-Pb定年,获得了营城组火山岩年龄为114～112 Ma,并认为该年龄结果代表了松辽盆地区域晚中生代岩浆作用的上限时间。通过对松辽盆地及邻区的火山年代学的对比发现:中国东北地区晚中生代曾发生过多期的岩浆事件,时间分别为:166～150 Ma;140～130 Ma;130～120 Ma;114～109 Ma。松辽盆地内早白垩世营城组火山岩年龄与我国东北地区中生代最后一期岩浆作用时间一致,指示了东北地区中生代最后一期岩浆事件年龄。松辽盆地营城组火山岩年龄的厘定将为本区中生代岩石圈减薄的上限时间提供进一步可靠的年代学约束。  相似文献