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1.
HUANG Yulong WANG Pujun CHEN Shuming .College of Earth Sciences Jilin University Changchun China.Daqing Oilfield Corporation PetroChina Daqing Heilongjiang China 《东北亚地学研究》2009,12(2):64-79
About forty productive oil/gas fields hosted in volcanic reservoirs have been found since 1957 in fourteen basins of China. They can be simply subdivided into two groups, the east and the west. Reservoir volcanic rocks of the east group are predominantly composed of Late Jurassic to Early Cretaceous rhyolite and Tertiary basalt, preferred being considered as rift type volcanics developed in the circum-Pacific tectonic regime. Those of the west are Permo-Carboniferous intermediate/basic volcanic rocks, being island-arc type ones developed in paleo-Asian Ocean tectonic regime. 相似文献
2.
About forty productive oil/gas fields hosted in volcanic reservoirs have been found since 1957 in fourteen basins of China. They can be simply subdivided into two groups, the east and the west. Reservoir volcanic rocks of the east group are predominantly composed of Late Jurassic to Early Cretaceous rhyolite and Tertiary basalt, preferred being considered as rift type volcanics developed in the circum-Pacific tectonic regime. Those of the west are Permo-Carboniferous intermediate/basic volcanic rocks, being island-arc type ones developed in paleo-Asian Ocean tectonic regime. 相似文献
3.
In the northern Songliao Basin, volcanics are fre-quently found and related closely to tectonic activi-ties during Early Cretaceous. The lava is mainly erupted along deep faults and distributed along the margine of the faulted depression. In deep part of Xujiaweizi area, natural gas exploration has been very successful, such as in the well Wang 9-12, well Shengshen 101 and well Fangshen 9 which are all highly-yield gas wells. Anda fault depression is lo-cated in the north of Xujia… 相似文献
4.
A series of volcanic rocks were developed in the deep part of Anda faulting depression. The reflection of therocks are mainly stratiform and hummocky. Three kinds of volcanic facies, e.g. explosion facies, effusion facies andsub-volcanic facies,were recognized by different reflecting characteristics in the seismic profile. The volcanic rocks areformed during three episodes of volcanic activities from Shahezi Formation to Yingcheng Formation. The volcanismshave relation to the formation of Songliao Basin and regional tectonics of northeastern China. Some of the volcanic rocksare good oil and gas reservoirs. 相似文献
5.
西天山温泉地区广泛发育泥盆—石炭纪火山—沉积地层,布拉格达瓦一带出露的托斯库尔他乌组发育一套由滨海间夹陆相—滨浅海相—浅海相过渡的碎屑岩夹火山碎屑岩的沉积建造,沉积物源主要为中酸性火山岩,碎屑颗粒沉积速度较快,属于近源沉积,蚀源区构造环境具活动性质,形成于未切割的活动岛弧。火山岩呈夹层、透镜体状分布于托斯库尔他乌组地层中,火山作用具周期性间歇喷发的特征,岩相表现为爆发—喷溢—沉积—爆发—沉积—爆发的周期性特点。火山岩属钙碱性岩石系列,火山岩浆对应的俯冲深度为上地幔。火山岩微量元素Nb,Sr,P,Ti,Ba为亏损型,Th,Zr元素富集,与岛弧环境密切相关;Nb/Ta为11.96~15.19,略低于原始地幔值,Zr/Hf为30.17~38.20,与原始地幔值相近。稀土总量∑REE为(186.57~208.58)×10-6,轻重稀土比值为5.38~6.13;(Ce/Yb)N为3.90~4.48,(La/Yb)N为4.67~6.70,δEu为0.28~0.49,属于轻稀土富集型,显示为负铕异常。根据沉积物源区分析及主、微量元素特征,结合区域构造背景,认为晚泥盆世托斯库尔他乌组沉积建造所反映的构造环境为消减带俯冲碰撞的岛弧环境。 相似文献
6.
地幔橄榄岩中橄榄石的指示意义 总被引：3，自引：0，他引：3
橄榄石是地幔橄榄岩和辉石岩的主要组成矿物,但也经常以斑晶和捕虏晶的形式出现在玄武质岩石中。结合近年来在地幔橄榄岩的主要元素(如Mg和Fe)组成特征以及Li、Mg和Fe稳定同位素地球化学方面的研究成果,重点对橄榄石的地球化学特征与华北克拉通岩石圈地幔演化过程之间的联系进行了讨论,旨在加深对华北克拉通岩石圈地幔演化过程的理解。现有研究表明:地幔橄榄岩中橄榄石的矿物学特征、元素和同位素地球化学组成能够很好地指示岩石圈地幔的特征及其演化过程,因而具有重要的意义。对于克拉通地区的地幔橄榄岩来说,橄榄石的Mg#通常可以指示岩石圈地幔的属性,古老、难熔的地幔橄榄岩中的橄榄石一般具有较高的Mg#(>92),而新生的岩石圈地幔橄榄岩中的橄榄石则具有较低的Mg#(<91)。因此,地幔橄榄岩中橄榄石的Mg#在一定程度上具有年龄意义。橄榄岩中橄榄石的Li、Mg和Fe同位素组成也可以明确指示岩石圈地幔的属性及其所经历的演化过程,正常地幔的δ7Li、δ26Mg和δ57Fe组成相对均一,如果上述同位素组成偏离正常地幔值,则说明岩石圈地幔经历了熔体/流体的交代作用。华北克拉通地区地幔橄榄岩捕虏体中橄榄石的Li、Mg和Fe同位素组成研究表明:该区的岩石圈地幔经历了多个阶段、不同来源的熔体/流体的改造过程。 相似文献
7.
为了阐释钼催化作用下的煤成气碳同位素演化特征和机理,采用在原煤中添加单质钼的方式,开展催化生气模拟试验,测定模拟系列气样的单体烷烃气碳同位素组成,并对其演化规律和模式进行探讨.结果表明:无论加钼与否,模拟气甲烷碳同位素组成(δ(13C1))均以镜质组反射率1.1%为界分为演化趋势截然相反的2个阶段,乙烷碳同位素组成(δ(13C2))不存在明显的演化阶段性,但加钼煤样δ(13C2)由在较低成熟度阶段重于原煤样变为在较高成熟度阶段轻于原煤样;加钼条件下,模拟烷烃气呈现出正碳同位素系列,δ(13C1)为(-25~-45)×10-3,δ(13C2)重于-29×10-3,表明钼催化成因气属于有机热成因气范畴.对比模拟烷烃气碳同位素组成与镜质组反射率之间的关系,发现模拟烷烃气碳同位素组成演化规律与前人模式有所不同.加钼煤样的不同单体烷烃气碳同位素组成随有机质成熟度变化速率的不同而不同,指示生气作用在钼催化作用下得到增强,这一效应在裂解气生成过程中更为显著;加钼煤样δ(13C2)在较高成熟度条件下轻于原煤样δ(13C2)的原因可能在于钼催化效应促进了煤中壳质组裂解生气. 相似文献
8.
WANG Pu-jun HOU Qi-jun SHU Ping HUANG Yu-long GUO Zhen-hua LI Jin-long College of Earth Sciences Jilin University Changchun Jilin China Jilin Petroleum Company Songyuan Jilin China Daqing Petroleum Company Daqing HeiLongjiang China 《东北亚地学研究》2005,(Z1)
Volcanic rocks of the late Mesozoic are very important reservoirs for the commercial natural gases including hydrocarbon, carbon dioxide and rare gases in the northern Songliao Basin. The reservoir volcanic rocks include rhyolite, andesite, trachyte, basalt and tuff. Facies of the volcanic rocks can be classified into 5 categories and 15 special types. Porosity and permeability of the volcanic reservoirs are facies-controlled. Commercial reservoirs were commonly found among the following volcanic subfacies: volcanic neck (I1) , underground-explosive breccia (I3), pyroclastic-bearing lava flow (II3), upper effusive (III3) and inner extrusive ones (IV1). The best volcanic reservoirs are generally evolved in the interbedded explosive and effusive volcanics. Rhyolites show in general better reservoir features than other types of rocks do. 相似文献
9.
Volcanic rocks of the late Mesozoic are very important reservoirs for the commercial natural gases including hydrocarbon, carbon dioxide and rare gases in the northern Songliao Basin. The reservoir volcanic rocks include rhyolite,andesite, trachyte, basalt and tuff. Facies of the volcanic rocks can be classified into 5 categories and 15 special types.Porosity and permeability of the volcanic reservoirs are facies-controlled. Commercial reservoirs were commonly found among the following volcanic subfacies: volcanic neck (Ⅰ1), underground-explosive breccia (Ⅰ3), pyroclastic-bearing lava flow (Ⅱ3), upper effusive (Ⅲ3) and inner extrusive ones (Ⅳ1). The best volcanic reservoirs are generally evolved in the interbedded explosive and effusive volcanics. Rhyolites show in general better reservoir features than other types of rocks do. 相似文献
10.
Dawsonite, NaAlCO3(OH)2, is widespread as a cement, replacement and cavity filling in Hailaer Basin in China and Bowen-Gunnedah-Sydney (BGS) basin system in Australia. The origin of dawsonite is emphatically contrasted and analyzed through stable isotopic composition. Dawsonite δ13C values ranging from -4.0×10-3 to 4.1×10-3 are remarkably consistent through the BGS basin system. The calculated δ13C values of CO2 gas in isotopic equilibrium with dawsonite range from -11.3×10-3 to -4.6×10-3. These values indicate carbon of dawsonite came from inorganic CO2 gas accompanied by magmatic activity. In Hailaer Basin, the Dawsonite δ13C values ranging from -4.64×10-3 to 2.12×10-3 are also consistent. The calculated δ13C values of CO2 gas in isotopic equilibrium with dawsonite range from -11.82×10-3 to -5.11×10-3. According to the coincidence of dawsonite-bearing well and CO2 gas well with mantle source,lying along deep fracture within or adjacent to Yanshanian granite,it is concluded that CO2 gas forming dawsonite is derived from mantle related to magmatic process during the Yanshanian. A little biologic origin carbon owing to petroleum charging intervened when dawsonite formed. 相似文献
11.
库米什地区火山岩属该区蛇绿岩套的组成部分,形成于晚泥盆世,以中性和酸性岩石为主,火山碎屑岩较发育,具有钙碱性火山岩套的特征。岩套内的沉积夹层具有远海沉积的性质。火山岩岩石化学特征属钙碱性系列;微量元素地球化学证明岩浆起源于消减板块之上的地幔楔形区;稀有元素地球化学特征与安山岩的特征相符。综合分析这些证据发现,该区火山岩形成于弧后盆地环境。 相似文献
12.
为了深入了解塔中区块高温高压裂缝性气藏封堵层失效问题, 基于储层特征和流体特性的深入分析, 结合封堵层微尺度物理结构特征, 对高温高压裂缝性气藏封堵层失效特征进行了研究, 提出了封堵层气蚀剪切失效概念, 构建了封堵层气蚀剪切失效的物理模型, 并借助颗粒物质力学和液桥理论, 对封堵层气蚀剪切失效过程进行了深入研究, 并基于反向气蚀原理, 开展了室内反向承压实验研究。研究结果表明, 裂缝性封堵层"气蚀剪切"失效作为一种气藏封堵层特有的失效模式, 其发生过程分为3个阶段: 气体扩散降黏破坏、气蚀剪切剥离破坏和气液置换错位剪切破坏; 正向承压6 MPa的统一封堵层, 对于不同属性的流体其抗剪切破坏能力不同, 当反向驱替流体由柴油转变为氮气时, 封堵层的反向承压值由原来的2.0 MPa(22 min)和2.5 MPa(30 min)分别减小到后来的1.5 MPa(10 min)和1.0 MPa(12 min), 综合抗剪切性能降低了约50%, 表明气体具有与液体不同的破坏能力和机制。 相似文献
13.
Ningwu Basin is one of the Mesozoic continental volcanic basins in the middle and lower reaches of the Yangtze River.The volcanic rocks of the Longwangshan,dawangshan,Gushan and Niangniangshan formations,as well as the homologous subvolcanic rocks or small intrusions,are developed from old to new in the Ningwu Basin.Zircon U-Pb dating results show the latialite phonolite of Niangniangshan Formation was erupted at 128±1 Ma(i.e.,Early Cretaceous).The latialite phonolite contains moderate SiO2 contents(57.28%-60.96%)with high Na 2O+K 2O contents,belonging to shoshonite series.The samples have high REE contents,and display right-inclined REE distribution pattern.They are characterized by enrichment in some large ion lithophile elements(e.g.,LILEs,Rb,K),and depletion in some high field strength elements(e.g.,HFSEs,Nb,Ta,Ti).All volcanic samples have relatively depleted Nd isotopic compositions(ISr=0.707197--0.707878;εNd(t)=-0.5--0.9),indicating no genetic relationship with the lower crust of Yangtze plate,but a drift trend towards the EMII.The geochemical data suggest that the Early Cretaceous latialite phonolite was derived from the partial melting of an enriched lithospheric mantle metasomatized by subduction-related fluids in an arc-related setting.Based on the temporal and spatial distribution and geochemical variation characteristics of the regional volcanic rocks,it is suggested that the tectonic system within the study area changed from a subduction-related compression to an extensional environment in the early Early Cretaceous,which was caused by the ridge subduction of the Paleo-Pacific Ocean. 相似文献
14.
北票二道沟金矿床岩石稀土元素特征表明,其岩浆岩岩源均属上地幔。金矿母岩是来自上地幔不同部位的岩浆侵入岩石,金矿化与多次岩浆热液有关。 相似文献
15.
The Changling gas field is occurs in tight sandstone reservoirs of the Lower Cretaceous Denglouku Formation in the Changling fault depression , southern Songliao Basin , China, which constitutes a new gas-pro-ducing area in the depression .Using information on the source-reservoir-cap rock assemblage of the Denglouku Formation, fault activity, and single well burial history of well CS 1, together with data on reservoir fluid inclu-sion and laser Raman spectroscopy , we described the formation of the Changling gas field and determine that this fault depression did not possess suitable conditions for hydrocarbon generation .Coal-derived methane gen-erated from underlying hydrocarbon source rock accumulated in the Lower Cretaceous Yingcheng Formation .At the end of the Late Cretaceous Qingshankou Stage , underwater volcanic eruptions occurred in the northern part of the Changling gas field near Qian'an, resulting in the reactivation of deep faults .Mantle-sourced inorganic CO2 migrated along faults to hydrocarbon gas reservoirs in volcanic rocks of the Yingcheng Formation ;Mean-while, displaced methane ( hydrocarbon gas ) migrated upward to sand reservoirs of the Denglouku Formation . The methane accumulated and formed secondary gas reservoirs ,Therefore fault activity was the main factor con-trolling the generation of gas reservoirs in the Denglouku Formation .The main accumulation period of the Yingcheng hydrocarbon gas reservoirs was 82 Ma.Whereas gas reservoir formation in the overlying Denglongku Formation was 79 Ma, slightly later than the time of formation of the Yingcheng gas reservoir in CS 1 well area. At 79 Ma, the burial depth of the Denglouku Formation was 1800-2000 m, the diagenesis is relatively weak and the physical properties of the reservoir are relatively favorable for accumulation .This period is not only at gas generation peak time of three sets of source rock but also at the reactivation of deep faults during the forma -tion of fault-bound depressions , thereby providing favorable conditions for the migration and accumulation of methane . 相似文献
16.
额尔古纳地区中生代火山活动强烈,其主要的活动期间为晚侏罗世至早白垩世（１５０～１００Ｍａ）。根据新的岩石化学、稀土、微量元素、稳定同位素、构造等方面的分析结果得出以下认识：１．该区中生代火山岩来源较深,具幔源特征,岩浆形成在总体呈挤压背景的环境中,使得岩浆在演化过程中混入了大量的壳源物质;２．中生代火山岩大致分两个亚旋回,其中塔木兰沟组（Ｊ３ｔ）火山岩和上库力组（Ｋ１ｓ）火山岩是同一岩浆亚旋回的产物。 相似文献
17.
西天山温泉地区是以温泉岩群为基底的古老地块,岩浆活动强烈,发育大量不同期次花岗岩类,奥陶纪侵入岩为一套准铝质过铝质钙碱性岩石,(La/Yb)N值为6.22～13.02,轻稀土元素富集,δEu为0.77～0.96,具轻微负Eu异常,微量元素中富集Sr、Ba等大离子亲石元素,亏损Th、Nb、P、Ti等高场强元素,属于中等分... 相似文献
18.
本文对北秦岭早古生代海相火山岩的分布、时代进行了简介，对火山岩的层序及成分进行了讨论，确定了火山岩的系列、类型、名称及组合，分析了火山岩产出的构造环境及演化过程，估算了开合作用的距离、时间和速度，探讨了原始岩浆成分、岩浆来源和岩浆房深度及地幔类型，研究了岩浆的结晶温度及结晶顺序。 相似文献
19.
辽河群变质岩主要由片岩、大理岩、变粒岩、浅粒岩和板岩等十大岩类组成。主要岩石稀土元素组成具有变沉积岩的稀土分配特征。片岩和大理岩、变粒岩和浅粒岩的原岩主体为沉积岩,个别为火山岩,它们主要来源于大陆上部地壳;部分属上地幔或接近于大陆溢流玄武岩的物质经部分熔融的产物。 相似文献
20.
对胶东崮庄岩体黑云母闪长岩进行了岩石学、岩石地球化学和年代学研究。研究表明:崮庄岩体黑云母闪长岩为钙碱性系列岩石,岩石富集大离子亲石元素(如K,Ba,Rb)、LREE和活泼的不相容元素(如Th,U),相对亏损高场强元素(如Nb,Ta,Ti,P),崮庄闪长岩属壳幔混合成因,即由交代地幔部分熔融形成的基性岩浆与地壳物质熔融形成的酸性岩浆混合形成的。构造环境判别显示崮庄闪长岩属火山弧花岗岩,暗示伟德山序列花岗岩与古太平洋板块向欧亚板块俯冲密切相关。崮庄闪长岩LA-ICP-MS锆石U-Pb年龄值为(111.7±0.6)Ma,属燕山期早白垩世。 相似文献