A study on hydrocarbon generation potential of deep source rocks and gas sources in Changling Fault Depression,Songliao Basin     

Ling Zan  Zhihuan Zhang  Jiajia Fei  Yuyuan Wu  Zhenying Zhang  Liming Qin  Ling Mei  Wenhao Li 《中国地球化学学报》2011,30(2):255-263

Through natural gas exploration in the Changling Fault Depression,abundant natural gas flows were obtained and high-quality source rocks were also reveiled.Based on bulk analyses,organic matter abundance,organic matter type and thermal maturity of the source rocks were studied systematically.At the same time,gas gener-ating intensity and gas generating quantity were quantitatively analyzed by using basin modeling technologies.The results indicated that gas source rocks of the Shahezi Formation are characterized by abundant organic matter and dark mudstone distributions and high-over thermal maturity.They possess high gas generating intensity with the biggest value surpassing 500×108 m3/km2,and large gas generating quantity,accounting from 74.40% of the total amount.The Yingcheng Formation has good gas-source rocks with moderate dark mudstone and relatively high organic matter.It has type-Ⅲ organic matter and low-over thermal maturity.The gas generating intensity is moderate,between 20×108 and 60×108 m3/km2.The gas generating quantity is 13.63% of the total amount.The Huoshiling Formation has relatively good source rocks with limited dark mudstone and low organic matter.It has type-Ⅲ kerogen and over-thermal maturity.The gas generating quantity is 7.10% of the total amount.The Denglouku Formation has poor-gas source rocks,and is characterized by undeveloped dark mudstone and low organic matter abundance.It has type-Ⅲ organic matter and low-high thermal maturity.Hydrocarbon gases in the Changling Fault Depression mainly originated from the Shahezi Formation,and secondarily from the Yingcheng Formation.The contribution of the Huoshiling Formation gas source rocks is relatively small.  相似文献   

新疆艾比湖生态脆弱区生态服务价值对土地利用变化的响应   总被引：2，自引：0，他引：2  

马倩  孙虎  昝梅 《地域研究与开发》2011,30(4):112-116

以干旱区生态脆弱区新疆艾比湖区域为研究对象,运用GIS手段和生态经济学的方法,采用Costanza生态系统服务价值计算公式,并参照谢高地等人的中国陆地生态系统服务单位面积价值,探讨了艾比湖区域1990—2007年土地利用和生态系统服务价值的变化特征。结果表明:1990—2007年间,艾比湖区域土地利用处于发展阶段,土地利用程度呈增大趋势;1990,2001和2007年艾比湖区域生态服务价值分别为53.63,63.01和56.96亿元,呈波动性变化;研究区生态系统的服务性功能远大于生产性功能。2001—2007年间研究区生态系统服务价值下降速度较快,作为艾比湖湿地自然保护区的核心部分,生态系统服务价值具有退化的趋势,需要加强管理,控制人类活动的影响强度。  相似文献   

Strike-slip faults parallel to crustal spreading axes: data from Iceland and the Afar Depression     

Pietro Passerini  Marta Marcucci  Giovanni Sguazzoni  Leonardo Zan  Abdourahman Omar Haga 《地学学报》1991,3(6):607-618

Slickenside studies in regions of crustal spreading such as Iceland and the Afar Depression, East Africa, reveal that a significant number of faults parallel and close to rift axes are strike-slip rather than normal. Therefore, the pattern of brittle deformation in these regions does not conform to the classic two-dimensional schemes of oceanic tectonics and pre-oceanic rifting. Dip-slip and strike-slip faulting presumably alternated along or in the vicinity of spreading axes, indicate a varying stress field and a combination of transverse and longitudinal movements. In Iceland, strike-slip faults parallel to rifts are observed both west and east of the rift system as well as in a median area between overlapping rifts; the mechanisms proposed for their origin include accommodation of oblique convergence or divergence of crustal sections due to variations of spreading directions along axis and the interaction of overlapping rifts. In the Afar Depression this kind of fault is recorded west of the rift of Asal and can be imputed to reflect an interaction among rifts in the vicinity of the Afar triple junction. Rift-parallel strike-slip faults cannot however be assumed to be a feature of all crustal spreading axes due to the peculiarity of the examined regions: both of them are hot-spot areas and the Afar Depression lies at a triple junction.  相似文献   

基于灰色关联法的泥石流灾害易发性影响因素分析——以甘肃舟曲瓜咋沟泥石流为例     

郭瑞  彭杨洪  王其杰  付江涛 《地质论评》2018,64(6):1481-1488

2010年,甘肃舟曲“8·7”特大泥石流灾害给当地人民生命财产造成严重损失,泥石流的发生及其易发性程度受多种因素影响。为分析不同因素对泥石流灾害易发性影响程度,基于对甘肃舟曲瓜咋沟内不同泥石流沟道野外调查资料的总结与分析,运用层次分析法计算了泥石流灾害易发性指标,利用灰色关联度理论分析了泥石流灾害易发程度与各影响因素间关联程度。研究结果表明：运用层次分析法确定的泥石流灾害易发性程度与野外调研结果相一致;泥石流灾害的易发性受沟道内灾害点数量、主沟道坡降、日最大降雨量、植被覆盖率及汇水面积等的影响显著;沟道内灾害点数量和主沟道坡降,日最大降雨量、植被覆盖率及汇水面积,沟道长度、岸坡坡度及沟道宽度等分别对泥石流灾害易发性的影响程度较为接近;研究成果为类似地区泥流灾害防治工作部署具有一定指导作用。  相似文献   

天津馆陶组地热回灌井钻井和射孔工艺探讨          下载免费PDF全文

马忠平  王艳宏  沈健  刘赞  王连成 《探矿工程》2014,41(8):36-39

天津地热在开采的同时重视回灌,有效地保护了宝贵的地热资源。天津在基岩裂隙型地热中回灌效果良好,但馆陶组地热井回灌量欠佳,为了解决这一问题,进行了研究探索。介绍了采用射孔工艺成井,在保证取水效果的同时,使稳定无压回灌量达到了101 m^3/h,取得了很好的效果。  相似文献   

InSAR部分地学参数反演     

李志伟  许文斌  胡俊  冯光财  杨泽发  李佳  张恒  陈琦  朱建军  王琪洁  赵蓉  段梦 《测绘学报》2022,51(7):1458-1475

自然因素或人类活动可使地球表层或内部应力发生变化,进而产生灾害事件。获取灾害事件与灾害过程的关键地学参数对于准确理解灾变过程、科学解释灾变机制、正确拟定应对策略具有重要意义。InSAR技术已广泛应用于自然因素或人类活动导致的灾害事件与灾变过程的参数反演。本文首先介绍了InSAR卫星的发展和地表形变监测的基本原理;然后分析了InSAR地学参数反演在地震、火山活动、地下水抽取、矿山开采、冻土冻融、冰川运动、地下流体迁移等各类潜在致灾事件中的研究现状;最后分析了InSAR地学参数反演存在的主要挑战和问题。  相似文献   

棘皮动物育种数据管理与分析平台的开发及应用     

李彬  王卫军  王扬帆  孙国华  徐晓辉  冯艳微  李赞  崔翠菊  杨建敏 《海洋与湖沼》2022,53(5):1225-1233

以刺参为代表的高价值棘皮动物在我国的养殖规模不断扩大,市场价值越来越高,但有关棘皮动物育种数据管理与分析的系统并未开发。本平台是以ASReml软件为遗传评估核心,使用Mysql数据库和java、R语言,利用maven、myeclipse2017工具开发的一套基于B/S框架,在Linux环境下运行的育种数据管理与分析系统。平台包含6大功能模块:系统管理、种质信息、表型数据库、表型数据分析、基因组数据库和基因组数据分析等。能实现棘皮动物表型数据、系谱数据和基因组数据的管理、育种值分析、遗传力估算、近交和亲缘系数计算、遗传进展计算和选种配种方案制定。运用该平台对刺参育种模拟数据进行管理、分析与应用,利用模拟表型数据和基因组数据对刺参的棘刺、体重进行了遗传力分析和育种值计算,并提出选种配种方案。该平台的推广和应用将提升棘皮动物育种效率,对我国棘皮动物育种工作的发展具有重要的促进作用。  相似文献   

松南油伴生CO₂气的成因及其对油气藏的影响     

曲希玉  杨会东  刘立  刘娜  齐赞  唐惠 《吉林大学学报(地球科学版)》2013,(1):39-48

以松辽盆地南部长岭断陷油伴生气和含片钠铝石砂岩为对象,研究松南伴生CO2气的成因,并在此基础上,讨论幔源-岩浆CO2混入对油气动态成藏的影响。通过对伴生气组分,碳、氧及氦同位素数据的分析,发现松南油伴生CO2气的体积分数为1.57%～75.25%,主体在20%以上,δ13 CCO2值为-9.90‰～-4.00‰,R/Ra为0.95～4.46,说明松南油伴生气中CO2的体积分数很高,伴生CO2气主体为幔源-岩浆成因。如果幔源-岩浆CO2气大量混入油藏,将发生CO2驱油,形成次生油气藏。由松南油气藏的典型剖面特征及片钠铝石中原生烃类包裹体的发现,证实松南存在幔源-岩浆CO2驱油的事实。在幔源-岩浆CO2与油气混合成藏地区,寻找幔源-岩浆CO2充注驱油成因的次生油气藏已成为新的勘探思路。  相似文献   

The formation environment and development modes of Cenozoic source rocks in the Qiongdongnan Basin     

Wenhao Li  Zhihuan Zhang  Youchuan Li  Ning Fu  Yanran Huang  Ling Zan  Huimin Zhang 《中国地球化学学报》2012,31(4):431-440

According to the drilling results,there are three sets of source rocks of the Cenozoic Group in the Qiongdongnan Basin,including the Yacheng Formation transitional facies mudstone,the Oligocene Lingshui Formation semi-enclosed marine facies mudstone,and the Miocene neritic-bathyal facies mudstone.The hydrocarbon generating conditions of the source rocks in the study area are mainly controlled by sedimentary environment and organic matter input.The abundance of organic matter in the Oligocene source rocks which were formed in a low-energy back shore environment is confined by organic matter input and hydrodynamic condition.The Miocene source rocks formed in the open marine environment lack terrestrial organic matter input,whose organic matter abundance is constrained by the primary production of the ocean and the preservation condition of organic matter.In addition,the redox conditions are also significant to the formation of source rocks in the study area.According to the differences in key factors controlling the development of source rocks in different time periods and structural belts revealed by drilling practice,three development patterns of source rocks have been put forward.The first one is the transitional facies model featuring a great deal of terrestrial organic matter and weakly hydrodynamic conditions which are apt to develop high effective source rocks in the Yacheng Formation.The second one is the semi-enclosed marine facies featuring abundant terrestrial organic matter,weakly hydrodynamic condition and fine preservation condition in the central depression zone,which are apt to form fine-quality source rocks in the Lingshui Formation.The third one is the marine facies model featuring strong hydrodynamics in the shore-shallow area of northern continental shelf and the lack of benthic algae which are against the development of source rocks.It can be predicted that the continental slope is the perfect place to form source rocks where adequate amounts of light favor the photosynthesis of plants,besides the fine preservation and weakly hydrodynamic conditions.In the deep sea area,although accompanied with weakly hydrodynamic conditions and a reduction environment,it is not suitable for the development of source rocks on account of less aquatic organisms causing low primary production.  相似文献   

3Ma以来黄土高原朝那黄土-红粘土序列赤铁矿记录及其古气候意义   总被引：2，自引：0，他引：2  

李香钰  方小敏  杨一博  昝金波 《第四纪研究》2012,32(4)

土壤和前期研究表明黄土-红粘土序列的赤铁矿含量与环境密切相关,对气候的干湿变化非常敏感,气候越湿热,赤铁矿含量越高.本文研究表明黄土-红粘土样品漫反射光谱一阶导数曲线在555～575nm间的峰面积作为赤铁矿指数可以客观有效地指示赤铁矿含量的高低.通过黄土高原朝那剖面红粘土-黄土序列的系统漫反射光谱分析,建立了3Ma以来黄土高原赤铁矿含量变化记录,揭示赤铁矿含量在约2.5Ma,1.5Ma,0.6Ma和0.15Ma显著阶段性减小,指示了黄土高原阶段性变冷干的演化历史.  相似文献