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黄河三角洲入海口地区近地表地层特征与沉积模式 总被引:2,自引:2,他引:0
樊德华 《石油与天然气地质》2009,30(3):282
以黄河三角洲入海口地区为研究对象,采用岩性取心和静力触探等方法,对入海口地区黄河三角洲浅层沉积特征进行了分析。沉积相带主要以河道、决口扇、泛滥平原、潮坪为主,垂向序列类型主要为河口砂席-三角洲侧缘型和河口砂席-三角洲侧缘-砂席型两种。其中,入海口地区东北方向垂向序列主要以河口砂席-三角洲侧缘型为主;在西北方向,以河口砂席-三角洲侧缘-砂席型为为主。由此,提出了黄河三角洲发育的沉积模式。该认识不仅为本地区高密度地震采集提供了定量的表层地球物理参数,而且为层序地层学研究提供了一个实例。 相似文献
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我国正在加快建设天然气管网体系,已基本形成华北、东北、中部、西部地区以及长江三角洲和中南地区管网的主体框架。目前已有数条重要天然气输气管道正在动工兴建,输气管道施工技术也有很大的发展,同时输气管道的安全性已经引起人们的重视。 相似文献
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《Food Control》2014,35(2):703-706
The objective of this study was to evaluate the occurrence of aflatoxin M1 (AFM1) in raw milk samples from 18 dairy farms in the Yangtze River Delta region during four different seasons. A total of 72 tank milk samples was collected with 18 samples for each season. Milk AFM1 was detected using LC-MS/MS. The AFM1 was detected in 43 milk samples (59.7%) ranging in concentration from 10 to 420 ng/L. The concentration of AFM1 in raw milk was significantly higher during the winter (123 ng/L) than during other seasons (P < 0.05). There was no significant difference between the spring (29.1 ng/L), summer (31.9 ng/L), and autumn (31.6 ng/L) (P > 0.05) seasons. This indicates that raw milk collected during the winter is at high risk for AFM1 and that seasonal factors should be considered for the management of aflatoxins in both the feed and milk. 相似文献
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Oil samples from six oilfields in the Central Niger Delta were analyzed for normal alkanes, aliphatic isoprenoid hydrocarbons, aromatic hydrocarbons and biomarkers using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS). The study was carried out with the aim of assessing the origin and thermal maturity of the oils and the depositional environment of the organic matter from which they were derived, and to evaluate similarities (or differences) among the oils from the Central Niger Delta in comparison to those from other parts of the Delta. The ratios of n-alkanes and aliphatic isoprenoids showed that Pr/nC17 ranged from 0.56 to 0.86 while Ph/nC18 ranged from 0.22 to 0.31 indicating that the oils were derived from organic matter of both terrestrial and marine origin. Pristane/phytane ratios ranged from 2.67 to 3.50, suggesting that the organic matter was deposited in generally oxidizing environments. The oleanane index, which ranged from 0.07 to 1.39, and other biomarker data also indicate contributions from both marine and terrestrial organic matter. Both saturated and aromatic hydrocarbon biomarker data indicate that the oils are thermally mature. The study showed that the Central Niger Delta oils have organic geochemical characteristics similar to those of oils from other parts of the Delta. However, there is a striking difference in the distribution of aromatic hydrocarbons, and this may in future be used as a tool with which oils from different parts of the Delta can be differentiated. 相似文献
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分析了我国天然气市场的发展现状及前景,对其总体发展战略及战略定位作了思考。认为我国天然气市场的发展应坚持“资源作基础、供应是前提、需求为动力、价格作杠杆”的指导思想;市场战略的重点应放在天然气管道、储气库、进口LNG储运等基础设施建设,合理的天然气产业链价格形成机制,天然气法,东北地区、环渤海、东南沿海以及长三角地区的市场开发等方面;在天然气利用方面,应该大力发展城市燃气,稳步发展工业燃料,适度发展天然气发电,择优发展天然气化工.积极探索应用新领域;在天然气市场管理方面,我国现阶段宜采取开发输送一体化的模式。 相似文献
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通常意义上的次生气藏是由于构造演化过程中,古气藏遭到破坏,引起天然气的再次转移和再分配而形成的气藏。而本文所指的“次生高压气藏”是指原本储集于深部地层中的天然气经人为建立的通道运移到浅部地层,在浅部具有储藏条件的地层里大量重新聚集所形成的气藏。土库曼斯坦阿姆河右岸探区皮尔古伊构造浅层高压气藏就是这种典型的“次生高压气藏”,与地质意义上的次生气藏相比,存在着运移通道、与气源沟通状态、储层稳定性等方面的区别。该“次生高压气藏”的埋深浅、压力高,钻井液安全密度窗口窄,气体中含硫化氢,固井易漏、易窜,给钻井和固井施工都带来了困难和风险。为此,探讨并提出了以下有针对性的安全措施:对着火井井口安装引流罩可控放喷点火、在着火井边缘钻生产井强采泄压、钻定向救援井挤注水泥封堵老井井筒原生气体运移通道,由此集成了一套“次生高压气藏”安全钻井与治理的技术思路和实施方案。采用该套技术方案有可能排除皮尔古伊构造浅层“次生高压气藏”给钻井作业带来的风险,并减轻着火井放喷燃烧对气田产能的破坏。 相似文献
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E.S. Mahanjane D. Franke R. Lutz J. Winsemann A. Ehrhardt K. Berglar C. Reichert 《Journal of Petroleum Geology》2014,37(4):329-348
Petroleum systems analysis and maturity modelling is used to predict the timing and locations of hydrocarbon generation in the underexplored offshore Zambezi Delta depression and Angoche basin, northern Mozambique. Model inputs include available geological, geochemical and geophysical data. Based on recent plate‐tectonic reconstructions and regional correlations, the presence of Valanginian and Middle and/or Late Jurassic marine source rock is proposed in the study area. The stratigraphy of the Mozambique margin was interpreted along reflection seismic lines and tied to four wells in the Zambezi Delta depression. Thermal maturity was calibrated against measured vitrinite reflectance values from these four wells. Four 1‐D models with calibration data were constructed, together with another five without calibration data at pseudo‐well locations, and indicate the maturity of possible source rocks in the Zambezi Delta depressions and Angoche basin. Two 2‐D petroleum systems models, constrained by seismic reflection data, depict the burial history and maturity evolution of the Zambezi Delta basin. With the exception of the deeply‐buried centre of the Zambezi Delta depression where potential Jurassic and Lower Cretaceous source rocks were found to be overmature for both oil and gas, modelling showed that potential source rocks in the remaining parts of the study area are mature for hydrocarbon generation. In both the Zambezi Delta depression and Angoche basin, indications for natural gas may be explained by early maturation of oil‐prone source rocks and secondary oil cracking, which likely began in the Early Cretaceous. In distal parts of the Angoche basin, however, the proposed source rocks remain in the oil window. 相似文献
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中国海洋石油集团有限公司(以下简称中海油)在长江以北地区的天然气产供储销体系建设尚处于起步阶段。为了加快进度,根据国家天然气产供储销体系建设的思路,基于中海油在该区产供储销体系的现状,构建了具有中海油特色的天然气产供储销体系。该体系具有以下特点:①布局框架由7大具有中海油典型特色的支柱支撑,体系量化分析结构由12项要素组成,可以系统化地评估企业建设天然气产供储销体系中的总体适应性,逐一有效地识别具体设施的冗余程度或"瓶颈"所在;②以有限度的预期市场目标为导向,以储气设施建设为突破点,以区域"自平衡"为体系核心,以具有一定富裕量的"资源—设施—市场"平衡为建设原则。结论认为:①在长江以北地区,通过"海气+LNG"资源统一协同和"四点、N站、一网"的天然气基础设施布局,可以形成较大规模和互相支撑的天然气年周转、气化外输、储气和调峰能力;②依托于"资源池"的统筹调配和LNG接收站的小时级调峰能力,可以为高波动的用气需求量提供高弹性的供气保障;③在长江以南沿海地区产供储销体系的富裕能力能够直达或商业互换至长江以北地区,依托海上LNG资源的灵活调度和陆上外输管道气的流向调配,可以在更大范围内为长... 相似文献
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珠江口盆地白云凹陷北坡—番禺低隆起天然气成因类型及其烃源探讨 总被引:3,自引:2,他引:3
珠江口盆地白云凹陷北坡—番禺低隆起天然气的成因及其烃源问题,近年来引起了石油地质专家们的广泛关注。在前人工作基础上,根据天然气的组成、碳同位素及其甾萜类生物标志化合物特征,重点对天然气的成因类型及其烃源构成进行了深入分析。依据天然气甲烷碳同位素和乙烷碳同位素分布特征,将天然气成因类型划分为生物气、亚生物气、成熟偏煤型混合气、成熟—高熟偏油型混合气及成熟—高熟煤型气5类。天然气伴生凝析油的甾萜类生物标志物具有富集型煤系有机质和分散型Ⅲ型有机质两种明显不同的特征,由此认为油气主要来自成熟—高熟的渐新统恩平组煤系烃源岩、滨浅湖相烃源岩及始新统文昌组滨浅湖相烃源岩。通过油气地质及油气地球化学综合剖析,指出该区不仅具有巨大的天然气勘探潜力,而且具有石油资源勘探前景。 相似文献
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位于珠江口盆地的惠州26?6构造在中生界古潜山及古近系获得油气勘探重大突破,是该盆地古潜山及恩平组—文昌组凝析气勘探的首个规模发现。为进一步指导浅水富油区天然气勘探,应用天然气生成及分子碳同位素动力学技术,对惠州26?6油气田三级层序格架下的有效气源岩层进行系统研究。结果表明:惠州26洼文昌组六段(文六段)+五段(文五段)半深湖—深湖亚相烃源岩为惠州26?6油气田古潜山储层提供大量天然气,文五段半深湖—深湖亚相烃源岩为文昌组—恩平组储层提供一定量天然气,文昌组四段(文四段)半深湖—深湖亚相烃源岩为文昌组—恩平组提供少量天然气,上文昌组(文三段)和恩平组烃源岩基本不提供天然气;该气田属于阶段性累积聚气,成藏时间较晚,有效充注成藏期在10~0 Ma之间,目前仍处于有效充注阶段。这一新认识对于珠江口盆地富油区天然气勘探具有重要的指导意义。 相似文献
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新疆占全国总面积六分之一 ,其三大盆地蕴藏着丰富的天然气资源 ,且天然气市场潜力很大 ,预测2 0 0 0年天然气需求量为 40× 1 0 8m3,其中 95%用于工业。吐哈油田 1 997年公布储量为 669 2 7× 1 0 8m3,1 997年开始向乌鲁木齐市供气 4× 1 0 8m3/a ,主要用于尿素生产。由于吐哈油田天然气资源综合利用起步较晚 ,当前还存在天然气利用不充分 ,每年还有不少气在放空 ;所生产的LPG面临需求量下降 ,稳定轻烃不好利用等问题。为此 ,结合新疆地区地广人稀 ,交通不便 ,资源分散等特点 ,提出了吐哈油田的天然气宜在新疆内消化 ,加工成产品或中间产品面向全国的思路 ,寻求依靠科技发展天然气综合利用的有效途径。 相似文献
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珠江口盆地番禺低隆起天然气成因和气源分析 总被引:24,自引:8,他引:24
指出:珠江口盆地番禺低隆起天然气组成差异较大,既有烃类含量很高的纯烃气藏,也有无机成因的二氧化碳气藏和高含氮气藏;天然气乙烷碳同位素值绝大多数小于-28‰,以混合气和油型气为主;甲烷碳同位素值介于-44.2‰~-33.6‰之间,C2+含量介于4.76%~10.98%之间,C1/(C2+C3)值介于6.28~21.44之间,大多属于高成熟―过成熟天然气;与天然气相伴生的高成熟凝析油具有较高的Pr/Ph值(2.58~6.38),双杜松烷有一定丰度,C304-甲基甾烷含量低,来自于恩平组烃源岩。利用ln(C1/C2)―ln(C2/C3)和(δ13C2-δ13C3)―ln(C2/C3)图版,结合油-气-岩的综合分析,认为番禺低隆起天然气以来自于恩平组烃源岩干酪根裂解气为主,以原油裂解气和文昌组烃源岩晚期干酪根裂解气为辅。 相似文献
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��The general situation of natural gas in KelamayiWuerhe oil and gas region of Xinjiang is reported from geological texture, the types of gas reservoir, the regularity of gas accumulation and the nature of gas in this article, which shows a good prospect for gas exploration in this region. 相似文献
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混装分子筛脱水脱硫醇工艺在阿姆河处理厂的应用 总被引:1,自引:1,他引:0
SRI国际公司的研发人员(美国加州门洛帕克市;www.sri.com)开发出一种新型氨法脱碳技术。这是一种新的氨基混合盐法过程,避免了冷氨路线的一些问题。SRI过程(工艺)的关键是烟气气流注入吸收塔的底部,与铵水溶液和钾碳酸盐逆流接触。反应在20~40℃下发生,其吸收速度约为冷氨法的5倍。碳酸钾的主要作用是降低蒸汽压,避免波动更大的氨的损失。吸收剂在塔的下部,碳酸铵的比例很高。 相似文献
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超音速脱水在天然气处理中的应用 总被引:1,自引:1,他引:0
简要介绍了土库曼斯坦阿姆河右岸A区块第一天然气处理厂两种不同分子筛在同一吸附塔内分层混装的脱水、脱硫醇工艺原理及工艺流程,总结了分子筛在天然气深度脱水、脱硫醇工艺中的应用优势。 相似文献