雄安新区蓟县系雾迷山组岩溶热储特征、主控因素及有利区预测          下载免费PDF全文

鲁锴  鲍志东  季汉成  刘金侠  王贵玲  马峰  郭瑞婧  曹瑛倬  杨飞  符勇  李潇博  华盈鑫  阙宜娟  李宗峰  许西挺  胡先才 《古地理学报》2019,21(6)

雄安新区蓟县系雾迷山组中赋存丰富的地热资源,研究雾迷山组岩溶热储特征及优质储集层发育的主控因素是地热资源勘探的基础。综合运用野外剖面、岩心、薄片、钻井、测井、录井等地质与地球物理资料,对雾迷山组岩溶热储特征和演化过程进行了深入研究,明确了优质储集层形成的控制因素,预测了有利靶区。结果表明,雾迷山组岩溶热储主要岩性为晶粒白云岩、颗粒白云岩、微生物白云岩、硅质白云岩和角砾白云岩等,溶蚀孔洞、裂缝及其组合为主要的储集空间类型。雾迷山组热储平均孔隙度为3. 18%,平均渗透率为91. 48×10-3μm2;其中角砾白云岩物性最好。雾迷山组岩溶热储经历了沉积—准同生期成孔(雾迷山沉积期)、Ⅰ期表生增孔(雾迷山沉积期后至青白口纪前)、Ⅰ期埋藏减孔(青白口纪前至三叠纪)、Ⅱ期表生增孔(三叠纪—古近纪)、Ⅱ期埋藏减孔(新近纪—第四纪) 5个阶段,岩性及岩相、成岩作用和构造应力是雾迷山组有利热储形成的主控因素。藻云坪—云坪相、表生岩溶、埋藏溶蚀、准同生岩溶、岩溶高地—斜坡和地层裂缝段比率大于0. 4的6项叠合区是研究区最有利的岩溶热储发育区。  相似文献   

靖边油田L区块长6油层组沉积特征     

符勇  黄礼  白玉彬  鲍志东 《地质与资源》2019,28(1):49-56

靖边油田L区块长6油层组沉积微相展布及其演化规律的认识不清,长期制约着研究区的油藏开发.综合靖边油田L区块密井网资料、岩心资料以及粒度分析资料等,对研究区沉积相标志、沉积相类型、微相展布及微相演化规律进行综合研究,并建立了研究区的沉积模式.结果表明,研究区长6油层组主要为三角洲平原沉积,沉积微相类型主要有分流河道微相、天然堤微相、河漫滩微相和沼泽微相.  相似文献   

Measuring segregation: an activity space approach   总被引：3，自引：0，他引：3  

Wong DW  Shaw SL 《Journal of Geographical Systems》2011,13(2):127-145

While the literature clearly acknowledges that individuals may experience different levels of segregation across their various socio-geographical spaces, most measures of segregation are intended to be used in the residential space. Using spatially aggregated data to evaluate segregation in the residential space has been the norm and thus individual’s segregation experiences in other socio-geographical spaces are often de-emphasized or ignored. This paper attempts to provide a more comprehensive approach in evaluating segregation beyond the residential space. The entire activity spaces of individuals are taken into account with individuals serving as the building blocks of the analysis. The measurement principle is based upon the exposure dimension of segregation. The proposed measure reflects the exposure of individuals of a referenced group in a neighborhood to the populations of other groups that are found within the activity spaces of individuals in the referenced group. Using the travel diary data collected from the tri-county area in southeast Florida and the imputed racial–ethnic data, this paper demonstrates how the proposed segregation measurement approach goes beyond just measuring population distribution patterns in the residential space and can provide a more comprehensive evaluation of segregation by considering various socio-geographical spaces.  相似文献   

Evaluation of sewage source and fate on southeast Florida coastal reefs     

Futch JC  Griffin DW  Banks K  Lipp EK 《Marine pollution bulletin》2011,62(11):2308-2316

Water, sponge and coral samples were collected from stations impacted by a variety of pollution sources and screened for human enteric viruses as conservative markers for human sewage. While human enteroviruses and adenoviruses were not detected, noroviruses (NoV; human genogroups I and II) were detected in 31% of samples (especially in sponge tissue). Stations near inlets were the only ones to show multiple sample types positive for NoV. Fecal indicator bacteria and enteric viruses were further evaluated at multiple inlet stations on an outgoing tide. Greatest indicator concentrations and highest prevalence of viruses were found at the mouth of the inlet and offshore in the inlet plume. Results suggest that inlets moving large volumes of water into the coastal zone with tides may be an important source of fecal contaminants. Efforts to reduce run-off or unintended release of water into the Intracoastal Waterway may lower contaminants entering sensitive coastal areas.  相似文献   

Susceptibility of fish to Chattonella marina is determined by its tolerance to hypoxia     

Shen M  Xu J  Chan AK  Au DW 《Marine pollution bulletin》2011,63(5-12):189-194

The harmful alga Chattonella marina has caused massive fish kills and economic losses worldwide. However, the fish kill mechanisms by C. marina have not been identified. The present study has confirmed that a significant elevation of blood osmolality is the universal response in moribund fish exposed to C. marina and the possible reasons leading to contradictory reports were identified. Both osmotic distress and respiratory impairment are important mechanisms leading to fish kill by C. marina. The susceptibility of marine fish to C. marina appears to be inversely related to their tolerance to hypoxia, with the hypoxia intolerant goldlined seabream being the most susceptible, and the hypoxia tolerant green grouper being the most tolerant to C. marina. Further studies in the marine medaka (Oryzias melastigma) showed that fish susceptibility to C. marina is directly related to susceptibility of the fish to hypoxia, but not related to its tolerance to hypersalinity stress.  相似文献   

Reflectance spectroscopy and geochemical analyses of Lake Hoare sediments, Antarctica: implications for remote sensing of the Earth and Mars     

Bishop JL  Koeberl C  Kralik C  Fröschl H  Englert PA  Andersen DW  Pieters CM  Wharton RA 《Geochimica et cosmochimica acta》1996,60(5):765-785

Visible to infrared reflectance spectroscopic analyses (0.3-25 micromoles) have been performed on sediments from the Dry Valleys region of Antarctica. Sample characterization for these sediments includes extensive geochemical analyses and X-ray diffraction (XRD). The reflectance spectra and XRD indicate major amounts of quartz, feldspar, and pyroxene in these samples and lesser amounts of carbonate, mica, chlorite, amphibole, illite, smectite, and organic matter. Calcite is the primary form of carbonate present in these Lake Hoare sediments based on the elemental abundances and spectroscopic features. The particle size distribution of the major and secondary components influences their detection in mixtures and this sensitivity to particle size is manifested differently in the "volume scattering" and "surface scattering" infrared regions. The Christiansen feature lies between these two spectral regimes and is influenced by the spectral properties of both regions. For these mixtures the Christiansen feature was found to be dependent on physical parameters, such as particle size and sample texture, as well as the mineralogy. Semiquantitative spectroscopic detection of calcite and organic material has been tested in these quartz- and feldspar-rich sediments. The relative spectral band depths due to organics and calcite correlate in general with the wt% C from organic matter and carbonate. The amounts of organic matter and carbonate present correlate with high Br and U abundances and high Ca and Sr abundances, respectively. Variation in the elemental abundances was overall minimal, which is consistent with a common sedimentary origin for the forty-two samples studied here from Lake Hoare.  相似文献   

厄尔尼诺现象与地震活动性之间的关系仍不清楚     

Fors.  DW 毛可 《世界地震译丛》1995,(6):80-80

在刊登于近期的《EOS》的论文中,Walker(1995)提出了南太平洋区振荡指数特别低跟东太平洋南部地震活动幕之间相关的证据。他推测,地震活动与厄尔尼诺因果关系可能跟伴生震群的大规模海底火山及海底热活动直接和间接产生的热效应有关。为此,他引证了1991-1992年一个发生在18°S,116°W的异常震群,并指出在东太平洋洋脊15°S到19°S附近海域分布着大量火山和年青的熔岩流(Scheirer等,1993)。这一异常震群中的多数地震发生在Walker所关注的时间域内。该震群实际上  相似文献   

美国地质调查对所对能源的研究     

Hous.  DW 常丕兴 《国外地质与勘测》1994,(3):F003-F003,F004

  相似文献   

超压背景下中深层砂岩储集层沉积—成岩演化差异性分析: 以南海莺歌海盆地中新统黄流组为例^*          下载免费PDF全文

毛倩茹  范彩伟  罗静兰  曹江骏  尤丽  符勇  李珊珊  史肖凡  吴仕玖 《古地理学报》2022,24(2):344-360

南海莺歌海盆地内地层普遍发育超压,东方区和乐东区是莺歌海盆地天然气成藏有利区的核心地带。其中,东方区位于底辟带中心,超压形成时间较早(9—5 Ma),主要物源来自西部昆嵩隆起区;乐东区位于莺东斜坡带,超压形成时间较晚(5—2 Ma),主要物源区为东部海南隆起区。本研究通过铸体薄片、荧光薄片、扫描电镜、电子探针、含烃包裹体微束荧光分析、流体包裹体激光拉曼成分与均一温度、X射线衍射黏土矿物等分析测试研究方法,对东方区和乐东区超压背景下黄流组砂岩储集层的岩石学与物性特征、烃类充注与成岩作用特征进行对比分析。结果显示: (1)东方区黄流组砂岩的压实作用、胶结作用较弱,物性较好(平均孔隙度17.68%,平均渗透率11.11×10^-3 μm²),处于中成岩A期晚期;乐东区黄流组砂岩整体压实作用、胶结作用较强,物性较差(平均孔隙度8.94%,平均渗透率1.52×10^-3 μm²),处于中成岩B期。(2)研究区储集层物性主要受沉积作用、超压背景和成岩作用的控制。物源、沉积中心与沉降中心、沉积相类型,超压形成时间和烃类充注规模共同影响了储集层的成岩作用特征及成岩—孔隙演化过程。(3)超压在一定程度上抵抗了压实作用强度,抑制了胶结作用,促进了溶蚀作用。  相似文献   

超压背景下中深层砂岩储集层沉积—成岩演化差异性分析: 以南海莺歌海盆地中新统黄流组为例^*          下载免费PDF全文

毛倩茹  范彩伟  罗静兰  曹江骏  尤丽  符勇  李珊珊  史肖凡  吴仕玖 《古地理学报》1999,24(2):344-360

南海莺歌海盆地内地层普遍发育超压,东方区和乐东区是莺歌海盆地天然气成藏有利区的核心地带。其中,东方区位于底辟带中心,超压形成时间较早(9—5 Ma),主要物源来自西部昆嵩隆起区;乐东区位于莺东斜坡带,超压形成时间较晚(5—2 Ma),主要物源区为东部海南隆起区。本研究通过铸体薄片、荧光薄片、扫描电镜、电子探针、含烃包裹体微束荧光分析、流体包裹体激光拉曼成分与均一温度、X射线衍射黏土矿物等分析测试研究方法,对东方区和乐东区超压背景下黄流组砂岩储集层的岩石学与物性特征、烃类充注与成岩作用特征进行对比分析。结果显示: (1)东方区黄流组砂岩的压实作用、胶结作用较弱,物性较好(平均孔隙度17.68%,平均渗透率11.11×10^-3 μm²),处于中成岩A期晚期;乐东区黄流组砂岩整体压实作用、胶结作用较强,物性较差(平均孔隙度8.94%,平均渗透率1.52×10^-3 μm²),处于中成岩B期。(2)研究区储集层物性主要受沉积作用、超压背景和成岩作用的控制。物源、沉积中心与沉降中心、沉积相类型,超压形成时间和烃类充注规模共同影响了储集层的成岩作用特征及成岩—孔隙演化过程。(3)超压在一定程度上抵抗了压实作用强度,抑制了胶结作用,促进了溶蚀作用。  相似文献