洛带气田蓬莱镇组气层地震反射特征及横向预测   总被引：1，自引：0，他引：1  

杨开珍  陈代军  陈伟民  曹伟 《物探化探计算技术》2000,22(3):216-219

洛带气田为构造控制下的岩性气藏,储集岩主要为上侏罗统蓬莱镇组砂泥岩互层沉积中的砂岩,它具有厚度薄、层速度低的特点。在地震反射剖须上表现为波谷波峰相随、振幅较强的特点,气层层速度越低,则其反射波的振幅越强。利用气层地震反射特征结合已知钻井进行气层横向预测,取得了较好的实际效果。  相似文献   

冀中坳陷潜山油气输导体系及与油气藏类型的匹配关系     

吴伟涛  高先志  卢学军  崔周旗  孔令武  贾连奇  王海潮 《西安地质学院学报》2011,(1):78-83,88

通过总结前人研究结果,利用测井、钻井地质和地化等资料,对冀中坳陷潜山油气藏类型和油气输导体系特征进行研究,并结合已发现的潜山油气藏,建立了不同油气输导体系与潜山油气藏类型的匹配关系。结果表明：根据不同的圈闭遮挡条件,可将冀中坳陷潜山油气藏分为潜山顶、潜山坡和潜山内幕油气藏等3种类型;潜山油气输导体系发育断裂、不整合、内幕溶蚀层和复合型输导体系等4种类型;受碳酸盐岩地层、断层活动性影响以及与油气生成时间的匹配,断裂型输导体系具有高效性和时效性的特征,有利于形成潜山顶和内幕油气藏;不整合型输导体系由不整合上部底砾岩和下部淋浴带组成,具有＂双层＂输导的特点,有利于形成潜山顶和潜山坡油气藏;内幕溶蚀层型输导体系由潜山内部的溶蚀孔-洞-缝系统组成,其发育程度受内部地层泥质含量控制,有利于形成潜山内幕油气藏;复合型输导体系由单一型输导体系复合形成,具有＂多样式＂的特点,可以形成潜山顶、潜山坡和潜山内幕油气藏。  相似文献   

Research on basic characteristics of 2H, 18O and 14C in geothermal fluid in Guangdong Province,China     

ZENG Tu-rong 《地下水科学与工程》2014,7(1):42-52

In general, previous geothermal geochemical studies in Guangdong Province mainly involves single method to cover limited aspects and areas. In that way, various methods available cannot actually provide more convincing results of geothermal fluid’s circulation system and evolution process from different dimensions, especially in terms of isotope. As a result, more comprehensive researches remain to be done on geochemistry of geothermal fluid, in particular, the space-time law of isotope’s evolution pattern as well as recharge cycle. Based on data of environmental isotopes (2H and 18O) and the isotope of radiometric dating (14C), geothermal geology, characteristics of groundwater flow field and types of goethermal reservior in Guangdong Province are taken into account in this paper, so as to analyze numerical rule and spatial distribution features of isotopes. Thus, corresponding main causes, mechanism and hydrogeological significance can be revealed to further study the potential of geothermal fluid to renew and recharge in the long run, which is conducive to enrich geothermal theories and solve existing hydrogeological problems.  相似文献   

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游姗  孟庆筱  景鹏旭 《大地测量与地球动力学》2015,35(1):150-153

??y????????????????????????????????????????????趨???????????????????????????????????????????????????????????????????????M5.5????????????????????????????????PGA?175 Gal??????????????M5.5????????????????????????PGA?303 Gal???????????PGA????????????????????????????????????????б??????????  相似文献   

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陈俊华  甘家思  李胜乐  狄莉莎  薛军蓉 《大地测量与地球动力学》2007,27(3):97-105

??????2003??6????????????????????????????????????????????????????????????????м?Ъ???????????????????????????????????????????????渽??????????λ?????????2?????????Q????????????;ML??2.0???????????????????????????????????????????????????????????????????????????????????й???,??????????????????????????????????????????????;??????????????????????????????????????????????????????????ж????????????λ???????μ?????????????????????????????????????ú?????????????????????????  相似文献   

岩滩板文地下河及岩溶浸没内涝分析     

张美良 《南方国土资源》1996,(4)

研究目的主要在于通过查明板文地下河的汇水区范围以及板文地下河中下游段的分布轨迹及水文地质特征，岩溶水的补给来源与动态特征等，了解东兰县纳巴片岩溶内涝与岩滩水库蓄水后所引起的板文地下河岩溶浸没之间的关系，提出解决岩溶内涝的途径与措施，为纳巴片岩溶内涝治理提供依据。研究表明，纳巴片的岩溶内涝，除了与特殊的岩溶水文地质条件和大量集中降雨密切有关外，岩滩水库蓄水后，使库水沿板文地下河倒灌，地下水位升高，是造成纳巴片岩溶浸没范围增大，延长浸没时间的主要原因  相似文献   

基于优化-模拟技术的生态库容          下载免费PDF全文

吕孙云  许银山  兰岚  杜亚平  梅亚东 《水科学进展》2013,24(3)

为发挥水库在水资源开发利用与河流生态环境问题之间的协调作用,以丹江口水库为例,探讨了综合利用水库生态库容划分方法.以丹江口水库下游襄阳和仙桃为控制断面,采用Tennant法计算下游河道生态流量的参考值.在考虑丹江口水库的防洪、生态、供水、调水、发电、航运等综合任务和汉江中下游水量联系的基础上,建立了综合利用水库的生态库容优化模型,拟定了4组调度规则,应用自适应遗传算法和模拟调度方法进行求解.计算结果表明:设置生态库容后的调度图能较好地满足控制断面对生态流量的需求,获得较佳综合利用效益.  相似文献   

汉江丹江口流域水文气象预报系统          下载免费PDF全文

彭涛  位承志  叶金桃  王俊超  殷志远  沈铁元 《应用气象学报》2014,25(1):112-119

汉江丹江口流域水文气象预报系统在GIS技术的支持下,以水文气象监测网、定量降水估算、定量降水预报、洪水预报技术为基础,通过雷达估算降水技术、中尺度数值模式预报技术获取高时空分辨率的降水信息输入水文模型来进行水文气象预报。以Web形式为基础的汉江丹江口流域水文气象预报系统平台在2010年7月以及2011年9月汉江丹江口两次洪水过程中及时、准确地显示了流域实况降水、预报降水,准确地预报了洪水入库过程。目前系统已成功移植到三峡区间、清江水布垭、淮河王家坝、漳河水库等流域开展汛期试验与服务,取得了较好的应用效果。  相似文献   

Spatial and temporal patterns of the water quality in the Danjiangkou Reservoir,China     

《水文科学杂志》2013,58(1):124-134

Abstract

The three-route South-to-North Water Diversion Project (SNWDP), transferring water from the water-rich Yangtze River and its tributaries to the much drier area of North China for irrigation, industrial and domestic use, has been implemented in China since 2002. Thus, water quality in the Danjiangkou Reservoir, the water source area of the SNWDP's Middle Route, is of great concern. We investigate its water quality from 2004 to 2006 by monitoring some important physical (T, turbidity and SPM) and chemical (DO, pH, alkalinity, TDS, SpCond, ORP, COD_Mn and BOD) parameters and nutrient (nitrogen and phosphorus) contents. Consequently, their spatial and temporal patterns in the reservoir were examined. The results indicate that the water of the reservoir is of a Ca and HCO₃ type, and the major pollutants are nitrogen and COD_Mn. Comparisons among the sampling sites show that water quality increases downstream, implying the self-purification capacity of the reservoir. The reservoir in general has better water quality in the dry season than in the wet season. Integrated basin management would be critical of the water quality in the Danjingkou Reservoir for the interbasin water transfer project.  相似文献   

柴达木盆地西北缘现代冲积扇沉积特征及石油地质意义   总被引：3，自引：0，他引：3       下载免费PDF全文

王勇  钟建华  王志坤  段宏亮  连承波 《地质论评》2007,53(6):791-796

柴达木盆地处于古亚洲构造域和特提斯－喜马拉雅构造域的结合部，构造应力大而复杂，导致盆内地势起伏大，加上西南暖湿气流受喜马拉雅山系阻隔难以进入境内，盆内气候干旱，最终导致盆地内冲积扇极为发育。通过对大柴旦地区大头羊煤矿、鱼卡河、波门河和八里沟四个冲积扇的实地考察，共观测到3个亚相8个微相：扇根亚相沉积物最粗，分为古沟道、主水道和主水道间微相；扇中亚相沉积物偏细，成熟度增高，分为辫状水道、辫状水道间和纵坝微相；扇缘亚相沉积物最细，流体能量最低，分为水道径流和片流微相。不同沉积微相其沉积特征差异较大，认为古沟道、主水道和辫状水道微相具有较好的储集性能。勘探表明，冲积扇沉积与储层有着密切的关系，其内形成的油藏具有“自我保护”的能力；另外，冲积扇的形成很可能导致上覆地层形成扇背斜油藏，也可能导致下伏基岩形成基岩风化壳油藏。  相似文献