松辽盆地滨北地区层序地层学研究及隐蔽油气藏预测     

初丽兰  纪友亮  胡光明  陈世悦 《上海国土资源》2006,(3):1-4,18

在地震、测井、岩心、地球化学等各种资料的基础上将松辽盆地滨北地区划分为3个一级层序,11个二级层序,16个三级层序。重点研究青山口组、姚家组以及嫩江组的层序特征,分析了滨北地区油气勘探缓慢的原因,指出下一步油气勘探的方向,确定有利隐蔽圈闭的勘探目标为青山口组中的透镜状砂体以及姚家组的河流相薄层砂体。  相似文献   

滇西南昌宁-孟连构造带西带研究初探--以耿马弄巴剖面为例   总被引：3，自引：0，他引：3  

张凡  冯庆来  段向东  张志斌 《地质科技情报》2006,25(3):13-20

昌宁-孟连构造带的地层层序、地层时代归属和构造背景一直是热点争议问题.在1:25万临沧幅区域地质调查和系统总结前人研究的基础上,对该区弄巴剖面进行了细致的地层学、古生物学、沉积学、岩石地球化学等方面的研究,重新厘定了该区的地层层序,更正了其地质时代,在恢复该区的构造背景和古地理格架等方面取得了突破性进展.研究表明,滇西南耿马弄巴剖面是由不同时代、不同岩性的7个地层断片组成的断片型地层体,其地层序列为:上覆新近系南林组,下伏大陆斜坡相碎屑岩沉积和代表洋盆沉积环境的两套地层.在此基础上,重新对岩石地层单位进行了划分,厘定了温泉组、曼信组、平掌组和南皮河组,并恢复了该区被动大陆边缘至洋盆构造背景,进而探讨了其古地理格架的演化历史.  相似文献   

太行山东麓石家庄——漳河三叠系下统刘家沟组地层分段探讨     

戴上京 《中国煤田地质》2006,18(4):31-32

三叠系下统刘家沟组地层在河北省南部广泛分布，通过对刘家沟组地层的分段研究，对三叠系地层覆盖下含煤有利地段的寻找及深部煤田的预测具有一定的积极意义。  相似文献   

复杂地层中深孔绳索取心钻探技术研究          下载免费PDF全文

孙建华  张永勤  赵海涛  刘秀美 《探矿工程》2006,33(5):46-50

究开发成功的SQ系列高强度绳索取心钻杆首次采用了薄壁钻杆内镦粗技术。同时，通过优化接头螺纹参数，改进钻杆接头热处理和表面处理工艺，简化钻具结构等措施，使绳索取心钻杆强度提高40%以上，使用寿命明显增加，钻具冲洗液过流阻力大幅降低。钻杆可以采用垫叉和扳叉拧卸。在地质条件复杂的勘探区试验示范，取得了良好的应用效果。  相似文献   

浙江嵊泗海域第四纪沉积层序及承压水层位特征初探   总被引：1，自引：0，他引：1  

李珍  李杰  李贞  张莱  骆祖江 《上海国土资源》2008,(2):7-14

通过对“嵊泗二井”地层层序和孢粉层序分析结果与前人研究成果及数据进行对比,同时参考长江三角洲、东海内陆架的第四纪沉积环境演化的总体框架,对嵊泗二井进行了第四纪地层的划分,并初步探讨了各含水层和隔水层的地层特征,为今后对东海陆架区地下水的开采和利用提供研究基础。  相似文献   

深覆盖区综合找煤技术方法在鲁西曹县煤田张湾勘查区中的成功运用          下载免费PDF全文

马祥县  张洪波  张尚坤  杨斌  罗文强  唐璐璐  仵康林  陈文韬 《山东国土资源》2022,38(5):15-19

石炭二叠系是山东省重要含煤层位。鲁西曹县煤田3煤层上覆近千米的新生代地层,以其为主形成的地震反射波在张湾勘查区内可连续追踪,是3煤层构造解释和宏观结构解释的主要依据。区内煤系地层为一单斜构造形态,走向NW,倾向SW,倾角一般约2°～7°左右。通过区域地质分析、构造演化研究以及物探钻探相结合的综合勘查方法,山东省地质科学研究院对张湾勘查区进行了勘探评价,查明煤炭资源量6亿多吨。实践证明,区域地质分析、构造演化研究以及物探钻探相结合的综合勘查方法在深覆盖区找煤是行之有效的。  相似文献   

Growth and demise of the Jurassic carbonate platform in the intracratonic Paris Basin (France): Interplay of climate change,eustasy and tectonics     

《Marine and Petroleum Geology》2014

It is usually very difficult to identify and quantify the relative influence of tectonics, eustasy and climate on carbonate system evolution from sedimentary records. In order to improve our understanding of these mechanisms, we have traced for the first time, the evolution of the eastern Paris Basin platform throughout the entire Jurassic period. This carbonate platform underwent eight successive growth and demise phases, with different depositional profiles ranging from ramps to flat-topped geometries. The eight carbonate growth periods are compared with the standard sea-level curves, local tectonic regimes and recently published oxygen-isotope and/or clay mineralogy databases. Prograding heterozoan facies along ramp profiles mark periods dominated by second-order eustatic sea-level rise, relatively cool sea surface temperatures, and mesotrophic and humid conditions (Hettangian, Pliensbachian, late Oxfordian, Tithonian). During these periods, variable detrital contents in the sedimentary succession hampered the efficiency of shallow-marine carbonate factories. Higher sea surface temperatures, oligotrophic and humid conditions associated with either eustatic sea-level rise or very high local subsidence occurred during the early Bajocian and the mid-Oxfordian. These seawater properties seem to have favoured the aggradation of scleractinian corals forming dome-shaped bioherm buildups. An oolitic and lime-mud carbonate system, deposited during the Bathonian second-order eustatic sea-level fall, is characterised by miliolid-rich micritic facies on a rimmed-ramp under stable, cooler and drier conditions. The second-order maximum flooding associated with a sea surface temperature decline and/or a seawater eutrophication caused at least five carbonate demise periods (i.e. Toarcian, earliest late Bajocian, Callovian/Oxfordian transition, earliest late Oxfordian and Kimmeridgian).  相似文献   

探地雷达在确定全新世海侵线方面的应用   总被引：1，自引：0，他引：1  

祁雅莉  黄海军  刘艳霞  刘晓  杨曦光 《海洋科学》2014,38(11):108-115

针对全新世大暖期古海岸线位置的不确定性问题,提出了一种利用探地雷达进行最大海侵位置追踪的方法,在探地雷达可获得连续沉积地层图像的理论基础上,在具有丰富研究资料的莱州湾东岸开展了实验研究。结果表明,利用Mala RAMAC100MHz天线结合相应的图像处理手段,能够识别区域10 m以内浅地层中海陆相沉积物分界面,与已有钻孔和现场探挖浅孔剖面对比,具有较好的一致性。证实了利用探地雷达追踪全新世海侵时期古地层、将海相层尖灭点处确定为最大海侵线位置,进一步恢复古环境是可行的。本文为研究古海岸线位置提供的方法,即通过探地雷达探测地层,得到高清的可视化图像,这使得古海岸线位置确定更精确、更直观。  相似文献   

Tectono-sequence stratigraphic analysis of the Lower Cretaceous Abu Gabra Formation in the Fula Sub-basin,Muglad Basin,southern Sudan     

《Marine and Petroleum Geology》2015

The Fula Sub-basin of the Muglad Basin of southern Sudan is an active-fault bounded basin with an area of approximately 3300 km². The Lower Cretaceous Abu Gabra Formation formed during the first of three rifting cycles. It can be subdivided into five 3rd-order sequences named SQA∼SQE from bottom to top, indicating five stages of tectonostratigraphy and tectonosedimentary evolution. The spatial distribution and temporal evolution of clastic depositional systems are described in this paper based on integrated analysis of seismic, core and well logging data. In the Abu Gabra Formation of the Fula Sub-basin, a variety of depositional systems are recognized, namely, fan delta, braided delta, delta, sublacustrine fan and lacustrine system. The Fula Sub-basin has undergone a complex and phased rifting evolution, and a high abundance of transfer zones developed, causing the resulting distribution and architecture of both the sequence and depositional system to be controlled by various types of transfer zones. The following three types of sequence architectures from northern to southern part of the Fula Sub-basin have been identified: simple dustpan-shaped sequence architecture in the north, transfer-zone sequence stratigraphic architecture in the middle and graben-shaped sequence architecture in the south. The sequence architecture is under the control of the large-scale central transfer zone, and nine models are built to study the effect of at least three categories of small-scale transfer zones on the depositional systems in the Fula Sub-basin. The small-scale transfer zones play significant roles in basin fill, primarily in controlling of the positions of deposit-input points. This study provides valuable insights into tectonic control of depositional systems and sequence architectures in a continental rift basin such as the Fula Sub-basin.  相似文献   

IVSA模型在双来源自动站小时降水数据实时拼接中的应用     

刘一鸣 《气象》2015,41(11):1398-1407

利用2012年5月1日至7月31日全国自动气象站两种来源实时上传资料中的“非缺测不一致”小时降水数据,详查了问题的产生原因,为在实时拼接过程中高效判断数据正确性,提出较小尺度时间序列求证比对模型（IVSA）：当同一时间同一台站的两种来源小时降水值发生不一致时,首先在较小时间尺度（分钟级）序列上使用内部一致性检查方法分别求证小时降水的正确性;当各自在较小时间尺度序列均无法证伪时,将单元出错概率引入两分钟降水序列的比对过程,并据此竞优遴选得出较为可靠的小时降水数据。指出：（1）产生非缺测不一致问题的原因主要有生成报文时观测数据不全、报文处理环节不一致、台站信息不正确三类。（2）使用2012年5月1360组实例形成IVSA模型参数后,模型在2012年6—7月的4017组非缺测不一致数据中取得了99.65%的判断准确率。通过IVSA模型,非缺测不一致的小时降水数据取舍问题可在分钟降水序列比对中找出答案。  相似文献