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WANG Tieguan 《中国科学D辑(英文版)》2004,47(3)
Copyright by Science in China Press 2004 High-waxy condensate is a kind of special hy-drocarbon resources, i.e., the high molecular weight (HMW) alkanes, which usually appear in a solid wax fraction under normal temperature and pressure, but are dissolved by hydrocarbon gas as a high-waxy condensate of single gaseous phase under subsurface high temperature and pressure. Nevertheless, once produced in an oil-gas well, the subsurface condensate flows into the well-bottom, and then immediately … 相似文献
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YANG ChuPeng GENG AnSong LIAO ZeWen SUN YongGe & ZHANG LüHui State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China Graduate University of Chinese Academy of Sciences Beijing 《中国科学D辑(英文版)》2009,52(1):12-21
Gas washing has been known in the Tazhong area of the Tarim Basin, but its quantitative assessment has not yet been reported.
Here the influence of gas washing fractionation in the area was discussed based on the gas chromatogram data of 68 oils and
the results of the mixing experiments of a black oil and a condensate. The results show that the intensity of gas washing
fractionation decreased generally from northern to southern part and vertically from deep reservoirs to shallow reservoirs.
The gas washing fractionation was mainly controlled by fault systems in this area, with the increase of n-alkane mass depletion positively correlated to the number and scale of faults. Gas washing fractionation appears to have
affected the hydrocarbon property, and as a result the diversity of the crude oils is markedly controlled by gas washing.
In addition, the occurrence of waxy oil in this area may be resulted from multiple factors including gas washing, mixed filling
and migration fractionation.
Supported by National Basic Research Program of China (Grant No. 2006CB202303) and the National Natural Science Foundation
of China (Grant No. 40672091) 相似文献
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本文概述了中国南方碳酸盐岩地区的油气勘探经历和认识过程.在刘光鼎院士提出的"油气资源二次创业"理论方法指导下，我国在海相碳酸盐岩地区开展的地球物理勘探工作取得了重要成果.海相碳酸盐岩地区具有更复杂的地质构造和演化过程，该类地区寻找油气是世界性难题，传统勘探手段已不适用.本文给出了该类地区进行地球物理勘探的新思路、新方法、新技术，并以举世瞻目的普光大气田的发现说明了新方法的合理性和优势.文章最后给出在南方海相碳酸盐岩地区进行油气地球物理勘探的发展远景. 相似文献
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Low-mature gases and typical low-mature gas fields in China 总被引：2，自引：0，他引：2
No natural gas pool of industrial importance could be formed at the low-evolution stage of organic matter. In the 1980s, on the basis of the development in exploration practice, the hypotheses of bio-thermo-catalytic transitional zone gases and early thermogenic gases were proposed. The lower-limit Ro values for the formation and accumulation of natural gases of industrial importance have been expanded to 0.3%―0.4%. In the light of the two-stage model established on the basis of carbon isotope fractionation in coal-type natural gases, the upper-limit Ro values have been set at 0.8%―1.0%. In terms of the geological practice in the low-mature gas zones and China's main coal-type gas fields, it is feasible and proper to set the upper-limit Ro value of low-mature gases at 0.8%. Supper-large gas fields such as the Urengoy gas field in western Siberian Basin should belong to low-mature gas fields, of which the natural gas reserves account for more than 20% of the global proven reserves, providing strong evidence for the significance of such a type of resources. The proven natural gas reserves in the Turpan-Hami Basin of China have almost reached 1000 × 108 m3. The main source rocks in this area are the Jurassic Xishanyao Formation, which occurs as a suite of coal series strata. The corresponding thermal evolution indices (Ro ) are mainly within the range of about 0.4%―0.8%, the δ 13C1 values of methane vary between-44‰ and-39‰ (correspondingly Ro =0.6%―0.8%), and those of ethane are within the range of-29‰―-26‰, indicating that natural gases in the Turpan-Hami Basin should be designated to coal-type low-mature gases. The light hydrocarbon evolution indices of natural gases also fall within the area of low evolution while the precursor type of light hydrocarbons also shows the characteristics of the coal-type. The geological background, carbon isotopic composition and light hydrocarbon index all provide strong evidence suggesting that the proven natural gases in the Turpan-Hami Basin are low-mature gases. In China a gas field with the gas reserves reaching 300 ×108 m3 can be defined as a large gas field, and thus the proven low-mature gases in the Turpan-Hami Basin are equivalent to the reserves of three large gas fields. Its existence is of great significance in research on and exploration of low-mature gases in China. 相似文献
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David R. Burris Paul R. Dahlen Robert E. Hinchee 《Ground Water Monitoring & Remediation》2018,38(1):85-89
Soil gas sampling for 1,4‐dioxane at elevated soil temperatures, such as those experienced during in‐situ thermal treatment, has the potential to yield low results due to condensation of water vapor in the ambient temperature sampling vessel and the partitioning of 1,4‐dioxane into that condensate. A simple vapor/condensate sampling apparatus was developed to collect both condensate and vapor samples to allow for determination of a reconstituted effective soil gas concentration for 1,4‐dioxane. Results using the vapor/condensate sampling apparatus during a heated air injection SVE field demonstration are presented, along with those of a comparable laboratory system. Substantial 1,4‐dioxane mass was found in the condensate in both the lab and field (as high as ~50% in field). As soil temperatures increased, less 1,4‐dioxane mass was detected in field condensate samples than expected based on laboratory experiments. Extraction well effluent sampling at the wellhead by direct vapor canister sampling provided erratic results (several biased low by a factor of 5 or more) compared to those of the vapor/condensate apparatus. Direct vapor canister sampling of extraction well effluent after the air‐water separator, however, provided results reasonably comparable (within 35%) to those using the vapor/condensate apparatus at the wellhead. Soil gas sampling at elevated temperatures using the vapor/condensate apparatus alleviates potential low sampling bias due to condensation. 相似文献
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Peng Weilong Liu Quanyou Zhang Ying Jia Huichong Zhu Dongya Meng Qingqiang Wu Xiaoqi Deng Shang Ma Yongsheng 《中国科学:地球科学(英文版)》2022,65(5):874-881
Science China Earth Sciences - Helium gas is a scarce but important strategic resource, which is usually associated with natural gas. Presently, only one extra-large helium-rich gas field has been... 相似文献
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2001年地球物理学的一些进展 总被引：3，自引：9，他引：3
简要回顾了2001年地球物理学的一些进展。指出在用地球系统科学研究整个地球的结构、演化和动力学过程中，地球物理学作为地球科学中主要提供地球内部信息和资料的学科，将成为地球系统科学研究的一个重要内容。讨论了现在的地球和空间科学研究以及环境监到等地球物理技术在反恐怖活动以及在国家军事方面的重要意义及应用。在21世纪能源危机日益严重的情况下，中国急需进行油气资源的二次创业，而天然气水合物研究是能源研究的一个新方向。 相似文献
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南海的油气资源极为丰富，享有“第二个波斯湾”的美誉.南海地貌类型多样，地形复杂，其战略位置极为重要，是东亚及相邻各国必经之路.资源之争，使得周边各国使出浑身解数，发展海洋经济与技术，1981年至2002年，越南就从南沙海域的油田中开采了1亿吨石油、15亿多立方米的天然气，获利250亿美元，南海石油已成为越南国民经济的第一大支柱产业.近半世纪中国南海油气勘探工作取得巨大的成就，发现了26个新生代盆地，取得了南海海域的基本石油地质成果，为南海的勘探开发奠定了基础.南海具有巨大的勘探空间及技术发展空间，每一次的技术进步，都会带来南海油气勘探的质的飞跃. 相似文献
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羌塘盆地是目前国内石油勘探的热点地区之一,作者综合研究了羌塘盆地的地球物理、石油地质调查资料及INDEPTH-3深部调查结果,得出:1, 盆地内烃源层、储集层、盖层及其组合条件很好, 局部构造发育,有利于形成和保存油气藏,断裂不会成为致命问题,提出了今后工作的主要目的层为上三叠世-中侏罗系组成的中构造层;2,对盆地二级构造作了新的划分,否定羌中隆起,提出盆地表层的主要构造方向为北西-南东向,成“三凹三隆”及“一深凹”的地壳结构特征,其中主沉降带内部及其两侧是最有利的找油气远景地带;3,本区壳幔之间的相互作用较强,盆地北部火山及热活动多,对油气远景评价有较大影响,而盆地南部沉积厚度大,受深层热影响相对较小,是找油气的更有利的地段。4,强调查明深部地层物性、油气赋存状况,烃类物质的来源和上下构造符合情况是当务之急。重点是加强点上的调查和评价研究;5,提出不能轻视伦坡拉陆相第三系盆地找油前景,它可能汇聚有两侧海相地层的油气。 相似文献
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岩性油气藏在我国天然气勘探开发中占有非常重要的位置,其分布区域的成像是合理布设井位,提高钻井成功率的关键之一.本文首先基于地下介质的声学近似和波场回传理论,利用频率域单程声波方程延拓计算地震波场,进行全波形反演,获得地层密度和体积模量的定量成像,并依据油气藏物性特征和流体饱和多孔介质岩石物理模型,简要讨论了孔隙度和饱和度与密度及体积模量的关系,明确了地震油气藏成像新概念.在此基础上,定义了基于流体体积模量和孔隙度的成像函数,进行油气藏成像.理论模型计算表明该方法是可行的.通过对西部地区某气田二维地震数据处理,实现了致密砂岩气藏成像,钻井结果证实了气藏区域成像位置的准确性和方法的有效性. 相似文献
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海洋天然气水合物的地球物理研究(III):似海底反射 总被引：3，自引：1，他引：3
对天然气水合物研究中与似海底反射有关的一些观点进行讨论 ,以推动天然气水合物地震研究的认识 .30年的似海底反射研究表明 ,似海底反射仍然是指示天然气水合物沉积存在的最好手段之一 .有似海底反射 ,是可以认为存在天然气水合物的 .虽然存在“游离气带速度模型”与“水合物楔速度模型” ,但似海底反射主要由天然气水合物稳定带底界下方的游离气引起 .BSR上方的天然气水合物、下方的游离气与天然气再循环和含甲烷的流体流有关 .由于天然气水合物稳定带计算控制因素难以准确确定等因素 ,似海底反射与天然气水合物稳定带底界只是近似的对应关系 .需从动态的观点考虑天然气水合物 天然气体系及其与似海底反射的关系 . 相似文献
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人工诱发地震现象已经有很久的历史.水库蓄水、采矿、地热开发、从地下提取液体或气体,或将液体注入地球内部都可能诱发地震.大量地震监测数据与科学分析结果显示:美国俄克拉何马州的地震剧增主要与页岩油气开采的废水回注量相关;加拿大阿尔伯塔省的地震剧增主要与页岩油气开采水力压裂的工作量相关;而荷兰罗宁根天然气田的传统天然气开采也同样诱发了较强的地震活动.在中国四川盆地的页岩油气开发区域,地震活动近几年也大幅度增强,但目前监测与科研工作较少,对某些地震成因尚有争议.目前研究诱发地震问题已成为学术界与工业界的一门专业学科.推断诱发地震,除了分析时空分布与工业活动的相关性之外,本文综述了该领域基于地震学、地质动力学、构造地质学的多种分析方法.如何在油气开采过程中减少诱发地震的灾害影响成为当前相关各界极为关注的科研问题,本文介绍了多个国家或地区建立的控制诱发地震的管理系统、基于地震大数据的诱发地震概率预测方法,以及基于地球物理与地质信息的综合诱发地震风险评估方法,并对我国控制诱发地震问题提出建设性意见. 相似文献
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天然气水合物作为未来的一种替代能源引起了国内外很多研究者的关注,他们从不同的方面对天然气水合物进行了研究.随着研究的深入,许多研究者发现,全球天然气水合物中天然气资源量并没有最初认为的那么多,而且相差了几个数量级,这就大大降低了天然气水合物在未来能源中的地位.本文的研究目的是通过分析全球天然气水合物中天然气资源量的估算方法,归纳总结有关全球及区域估算天然气水合物中天然气资源量的文献,使人们对天然气水合物有个重新的认识,同时为未来的能源勘探开发提供一定的参考.通过分析我们发现全球天然气水合物中天然气资源量的估算值随着人们对天然气水合物认识程度的增加而降低;而且目前能够较准确反映全球海洋天然气水合物中天然气资源量的估算值是（1~5）×1015m3（大约500~2 500 Gt甲烷碳）.我们通过总结国外及国内几个典型区域的天然气资源量估算值还发现,国外研究者主要是根据钻孔及BSR资料确定用于计算天然气资源量的参数,使得计算结果较符合实际;而国内的学者基本是使用模拟计算及假设的方法确定各种参数,估算值仍存在很大差异,因此,我们认为只有获得实测数据才能使国内的估算结果更加接近实际. 相似文献
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《中国科学:地球科学(英文版)》2017,(5)
It is a challenge to determine the source and genetic relationship of condensate, waxy and heavy oils in one given complicated petroliferous area, where developed multiple sets of source rocks with different maturity and various chemical features.The central part of southern margin of Junggar Basin, NW China is such an example where there are condensates, light oils, normal density oils, heavy crude oils and natural gases. The formation mechanism of condensates has been seriously debated for long time;however, no study has integrated it with genetic types of waxy and heavy oils. Taking the central part of southern margin of Junggar Basin as a case, this study employs geological and geochemical methods to determine the formation mechanism of condensates,waxy and heavy oils in a complicated petroliferous area, and reveals the causes and geochemical processes of the co-occurrence of different types of crude oils in this region. Based on detailed geochemical analyses of more than 40 normal crude oils, light oils,condensates and heavy oils, it is found that the condensates are dominated by low carbon number n-alkanes and enriched in light naphthenics and aromatic hydrocarbons. Heptane values of these condensates range from 19% to 21%, isoheptane values from1.9 to 2.1, and toluene/n-heptane ratios from 1.5 to 2.0. The distribution of n-alkanes in the condensates presents a mirror image with high density waxy crude oils and heavy oils. Combined with the oil and gas-source correlations of the crude oils, condensates and natural gas, it is found that the condensates are product of evaporative fractionation and/or phase-controlled fractionation of reservoir crude oils which were derived from mature Cretaceous lacustrine source rocks in the relatively early stage. The waxy oils are the intermediate products of evaporative fractionation and/or phase-controlled fractionation of reservoir crude oils, while the heavy oils are in-situ residuals. Therefore, evaporative fractionation and/or phase-controlled fractionation would account for the formation of the condensate, light oil, waxy oil and heavy oil in the central part of southern margin of Junggar Basin, resulting in a great change of the content in terms of light alkanes, naphthenics and aromatics in condensates, followed by great uncertainties of toluene/n-heptane ratios due to migration and re-accumulation. The results suggest that the origin of the condensate cannot be simply concluded by its ratios of toluene/n-heptane and n-heptane/methylcyclohexane on the Thompson's cross-plot, it should be comprehensively determined by the aspects of geological background, thermal history of source rocks and petroleum generation,physical and chemical features of various crude oils and natural gas, vertical and lateral distribution of various crude oils in the study area. 相似文献
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WANG Tingbin Exploration Production Research Institute SINOPEC Beijing China 《中国科学D辑(英文版)》2005,48(4):454-466
Coal is the richest fossil fuel in the world. Theby-product formed during incoalation is gas that iscomposed primarily of methane (CH4)[1,2]. This gascan generally be named coal measure gas. Accordingto the occurrence conditions, coal measure gas can befurther divided into humic gas and coal-bed methane.Humic gas refers to coal measure gas that generatesfrom the coal measure source rocks (coal and dark-coloured argillaceous rocks in coal measures), and canbe expelled and migrate into various … 相似文献
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地震断层气监测的现状与展望 总被引：1，自引：0，他引：1
断层气测量是地震科学研究的重要方法之一，断层气测量具有实用、轻便、快便、价廉等优点，在地震监测预报和减灾活动中具有广阔的应用前景和巨大的潜力。本文对断层气测量在地震科学中的应用和现状作了简要的介绍，同时探讨了我国地震断层气监测系统中存在的一些主要问题，对今后的发展进行了展望。最后简单介绍了几种断层气监测新技术及新型气敏传感器。 相似文献