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银额盆地苏红图坳陷西部中生界烃源岩热演化史恢复
Thermal History Reconstruction of Mesozoic Source Rocks in Western of Suhongtu Depression, Inner Mongolia, Northern China
 [PDF]

祁凯 ,任战利 ,崔军平,陈志鹏,任文波
Qi Kai
, Ren Zhanli, Cui Junping, Chen Zhipeng, Ren Wenbo

地球科学(中国地质大学学报) , 2018, DOI: 10.3799/dqkx.2018.594
Abstract: 苏红图坳陷是位于银额盆地东北部的中生代断陷盆地,含油气资源勘探潜力较大.利用研究区7口井的75个镜质体反射率资料,分析了研究区中生界烃源岩热演化程度及分布特点,银根组烃源岩处于未成熟-低成熟阶段,苏红图组底部Ro分布在0.6%~1.2%,凹陷中心巴音戈壁组底部 Ro普遍大于1.1%.苏红图坳陷西部中生代以来的热历史恢复表明,研究区现今地温梯度为34 ℃/km,晚白垩世地温梯度约为40.6~46.7℃/km,地温梯度从40~42℃/km(135~110 Ma)增加到46~50℃/km (110~103 Ma),银根组沉积期(100~95Ma)地温梯度达到最大,为48~53 ℃/km;从乌兰苏海组沉积开始到现今,地温梯度先增大到40~46℃/km(92~80 Ma),后逐渐降低为34℃/km(80~0Ma).研究区早白垩世以来较高的地温场对油气生成、成藏起着重要的控制作用,烃源岩均在乌兰苏海组沉积末期达到最大热演化阶段.
Suhongtu depression, located in the northeastern of Yin'e basin (Yingen-Ejinaqi basin), is a Mesozoic faulting-subsiding basin with large oil and gas resources. 75 vitrinite reflectance data from 7 wells in the study area are used to analyze the degree of thermal evolution of Mesozoic source rocks. The thermal evolution degree of source rocks in Yingen Formation is in immature to low mature stage. The vitrinite reflectance (Ro) data distribute in 0.6%-1.2% at the bottom of Suhongtu Formation, and they are generally greater than 1.1% at the bottom of Bayingebi Formation in the center of the sag. The results of Mesozoic and Cenozoic thermal history show that the present-day geothermal gradient is 34℃/km, and approximately 40.6-46.7℃/km in Late Cretaceous. The temperature gradient was 40-42℃/km (135-110 Ma) and increased to 46-50℃/km (110-103Ma). Especially, during the deposition period of Yingen Formation (100-95 Ma), the geothermal gradient reached the maximum at about 48-53℃/km. From the beginning of Wulansuhai Formation, the geothermal gradient gradually increased to 40-46℃/km (92-80Ma) and decreased to a present-day value of 34℃/km (80-0 Ma) ultimately. The higher geothermal field has played an important role in controlling oil and gas generation and accumulation since the Early Cretaceous, and the source rocks have reached the maximum thermal evolution stage at the end of the sedimentary period of the Wulansuhai Formation
东濮凹陷北部盐湖相原油特征与成因
Characteristics and Formation Mechanism for the Saline Lacustrine Oil from the North Dongpu Sag
 [PDF]

张洪安,李素梅,徐田武,庞雄奇,张云献,万中华,纪红,
ZHANG Hongan
, LI Sumei, XU Tianwu, PANG Xiongqi, ZHANG Yunxian, WAN Zhonghua,JI Hong

- , 2017,
Abstract: 摘要: 东濮凹陷盐湖相油气成因与成藏机理研究薄弱。采用色谱/质谱(GC/MS)等常规技术,结合傅立叶变换离子回旋共振质谱、单体烃碳同位素技术,对东濮凹陷北部文明寨、卫城地区油气特征及其成因进行了解剖。结果表明,该区原油具有植烷对姥鲛烷优势显著、伽马蜡烷富集、升藿烷“翘尾”、甾烷异构化程度较低等咸水、盐湖相原油的典型特征。原油还具有正构烷烃单体烃碳同位素呈低碳重、高碳轻、近两段式分布的特征,与柴达木盐湖相原油有所差异。原油中检测到丰富的S1、S2、O1S1、N1、O1、O2、O3等芳构化程度较低的NSO化合物,其与该区低熟油的形成关系密切。油-油、油-岩详细对比表明,东濮凹陷北部原油主要来自埋深超过3 000 m的沙三—沙四段烃源岩、存在不同成熟度原油混合聚集现象。研究结果对该区进一步油气勘探具有重要指示意义。
Abstract: Conventional geochemical methods including GC/MS, Rockeval combined with ESI FTICR MS and compound specific carbon isotopic analysis are used to reveal hydrocarbons generation and migration style for the saline lacustrine oils from the Wenmingzhai and Weicheng Oilfield in the North Dongpu Sag, Bohai Bay Basin, which is still unclear enough up to date. It was observed that the crude oils bearing typical characteristics of saline lacustrine oils such as predominance of phytane to pristine and C35hopane to C34hopane, enrichment of gammacerane, and low extent of isomerization of steranes. The oils are also featured by twostage carbon isotope distribution of nalkanes:the δ13C for the nalkanes with carbon number less than 21 is ranged in -29‰ to -28‰, while those larger than 21 is ranged in -31‰ to -29‰, which is different from “parallel lines pattern” for the saline lacustrine oils from the Western Qaidam Basin, suggesting different paleoenvironment and precursors for the nalkanes in the North Dongpu Sag. Abundant NSOs compounds including S1,S2,O1S1,N1,O1,O2 and O3 with low extent of aromatization are detected from the oils analyzed, which were predicted having a close genetic relationship with the immature oils in the area. A detailed oiloil and oilsource rock correlations showed that the crude oils analyzed are primarily derived from Es3 and Es4 source rocks with burial depth larger than 3 000 m. It was suggested that the crude oils are mixed by different source rocks with varied thermal maturity, which would be instructive for the further petroleum exploration in the area
PRELIMNARY RESTORE OF THE MESOZOIC ORIGINAL BASIN AND ITS MAIN CONTROL FACTORS IN JIYANG SAG
济阳坳陷中生代原型盆地的初步恢复及其主控因素

Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou,China,
刘朝露
,夏斌

天然气地球科学 , 2006,
Abstract: Based on the analysis of the 4000m deep horizontal slice and the Mesozoic(J-K)Xiwa formation residual isopach map of Jiyang sag,the Mesozoic original basin was preliminarily restored in the paper.The results show that the original basin exists three types,that is,the first one is the northwestern type,which is located at the east of the sag;the second one is the northeastern type,which is located at the west of the sag;and the third one is the nearly east-west type,which is located at the center of the sag.Through the further analysis of the slice and its tectonic stereo-gram(including the distribution of the fault and symon fault),the main controlling factors of the Msozoic basin is northeastern andnorthwestern structures(including faults and symon fsult).It is very significant of these points in the paper for the guide of trapping advantageous objects in the next oil-gas exploitation of Jiyang sag.
DISCUSSION ON DEEP GAS GEOCHEMICAL CHARACTERISTICS AND GENESIS OF BONAN SAG, JIYANG DEPRESSION
济阳坳陷渤南洼陷深层天然气的地球化学特征及成因探讨

SONG Ming-shui,ZHANG Xue-cai,
宋明水
,张学才

天然气地球科学 , 2004,
Abstract: According to the chemical composition, carbon isotope, hydrogen isotope and noble gas isotope researches, the deep gas of Bonan sag displayed the characteristics of normal accompanying gas with crude oil, with high contents of heavy hydrocarbons. The genesis of the deep gas may not be high mature to over mature source rocks. The characteristics of carbon and hydrogen isotope composition show that the deep gas of Bonan sag mixed by biogenic gas, thermgenic gas and coal-formed gas. The noble gas (He) isotope of the deep gas from Bonan sag indicated that the accompanying gas with crude oil in the sag is typical crust type gas, without clear mantle type gas. Based on the low frequency of deep fault activity, Bonan sag provided a advantaged geologic area for deep oil and gas accumulation.
Ocean Bottom Seismometer Experiment across Chaoshan Sag in the northern South China Sea
南海北部潮汕坳陷海区海底地震仪调查实验

LUO Wen-zao,YAN Pin,WEN Ning,WANG Liao-liang,
罗文造
,阎贫,温宁,王嘹亮

热带海洋学报 , 2009,
Abstract: Chaoshan Sag has been regarded as a prospective relic Mesozoic sedimentary sag in the South China Sea.Recent drilling confirms the existence of the Mesozoic group.In one field experiment,five sets of ocean-bottom seismometers assembled by Chinese scientists have been deployed successfully to explore the deep geological structure of the basin.The ocean-bottom seismic data show clear phases from inner crust and Moho discontinuity.The data also reveal that the crust over the Chaoshan Sag thins less compared wi...
Controls of the Transverse Accommodation Zones on the Provenance System in Baxian Sag
冀中坳陷霸县凹陷横向调节带对物源体系的控制作用

XIE Xiao-jun,DENG Hong-wen,
谢晓军
,邓宏文

天然气地球科学 , 2008,
Abstract: According to the scale of transverse transfer zones and the features of the structures, the transverse accommodation zones are subdivided into three orders. The first order zones control not only the depression architecture, but also the provenance direction in the zones. The second and third order zones mainly control the provenance direction of the main part of the sag and the distribution of the depositional system.
OBTURATION FACTORS ASSEMBLING NATURAL GAS:TAKING NORTH REGION OF JIZHONG SAG AS THE EXAMPLE
天然气藏的封存条件研究――以冀中坳陷北部地区为例

FANG Jie,
方杰

天然气地球科学 , 2004,
Abstract: Due to pervasion diffusibility of gas, obturation factors of gas is very importance in rift-basin with tension tectonic suffering more tectonization. A lot of difference types gas pools have been explored in north region of Jizhong sag, China northern, besides having excellent source rocks of generating gas hydrocarbon, and yet relation of obturation factors of gas. The paper generally discussed obturation factors (cover) assembling gas, expatiated main research results.The capillary pressure obturation ...
黄骅坳陷沧东凹陷孔二段泥页岩裂缝发育特征及主控因素分析
Fracture Characteristics and Main Controlling Factors of Shales of the Second Member of Kongdian Formation in Cangdong Sag, Huanghua Depression
 [PDF]

陈世悦,龚文磊,张顺,蒲秀刚,马洪坤,时战楠,张跃
CHEN Shi-yue
, GONG Wen-lei, ZHANG Shun, PU Xiu-gang, MA Hong-kun, SHI Zhan-nan, ZHANG Yue

- , 2016,
Abstract: 摘要: 黄骅坳陷沧东凹陷孔二段泥页岩沉积厚度大,有机质丰度高、类型好,是泥页岩致密油气勘探开发的重点层位之一。在岩心精细观察与描述基础上,利用偏光显微镜、荧光显微镜、激光共聚焦显微镜观察以及X射线衍射分析、岩石热解分析等技术手段,对沧东凹陷孔二段泥页岩的岩石学特征、裂缝类型及发育特征(长度、开度、角度、充填物等)进行研究,并分析了裂缝发育的主控因素。沧东凹陷孔二段泥页岩主要由长英质矿物、碳酸盐矿物及黏土矿物组成,主要岩性包括云质泥岩、砂质泥岩、泥质云岩、砂质云岩及白云岩等,沉积构造类型包括块状构造、层状构造、纹层状构造及透镜状构造等。孔二段泥页岩主要发育构造缝、层理缝、差异压实缝及异常高压缝等4种裂缝,其中构造缝最发育,其次为层理缝和差异压实缝,异常高压缝发育较少,裂缝中充填物主要包括黄铁矿、方沸石、方解石及沥青等。研究表明,构造作用、岩性与矿物组成、沉积构造、成岩作用及有机质丰度是控制沧东凹陷孔二段泥页岩裂缝发育的主要因素。
Abstract: The shale in the second member of Kongdian Formation(Ek2) in Cangdong Sag with large thickness, high values and excellent types of organic abundance, is one of the important intervals for dense petroleum exploration. Based on the detail observation and description of cores, this paper studied lithologic characteristics, fracture types and development characteristics(including length, opening,angle and filling)of shales in Ek2 in Cangdong Sag of Huanghua Depression by the observation of polarizing microscope and fluorescence microscope and laser scanning confocal microscope together with analysis of X-ray diffraction and rock pyrolysis. Furthermore, it analyzed the main controlling factors of fracture development. The shales of Ek2 in Cangdong Sag are mainly composed of felsic, carbonate and clay minerals; the main lithologies are dolomitic shale, silty mudstone, argillaceous dolostone, sandy dolomite and dolomite, etc; the main types of sedimentary structures include massive structure, lamellar structure, laminated structure and lenticular structure, etc.Four sorts of fractures develop in Ek2, i.e. structural fracture, interlayer lamellation crack, vertical-difference load fracture and overpressure-breaking fracture, among which the structural fracture is the most, followed by the interlayer lamellation crack and vertical-difference load fracture, and the overpressure-breaking fracture is the least. The main fillings in fractures are pyrite, analcime, calcite and asphalt. The results show that tectonism, lithology, mineral composition, sedimentary structure, diagenesis and organic matter abundance(TOC) are the main controlling factors for the development of fractures in shales of Ek2 in Cangdong Sag
北黄海盆地东部坳陷侏罗纪西南物源-沉积体系与源区构造背景
Southwestern ProvenanceSedimentary System and Provenance Tectonic Setting of Eastern Sag in the North Yellow Sea Basin
 [PDF]

高丹,程日辉,沈艳杰,王嘹亮,胡小强
Gao Dan
,Cheng Rihui, Shen Yanjie, Wang Liaoliang, Hu Xiaoqiang

地球科学(中国地质大学学报) , 2016, DOI: 10.3799/dqkx.2016.095
Abstract: 物源-沉积体系是原始储层物性的主要影响因素,与源区构造背景的综合分析是油气勘探工作的基础.北黄海盆地是位于苏鲁造山带-临津江造山带北侧中朝板块上中-新生代转换伸展断陷盆地.地震和钻井资料证实东部坳陷西南部有中-上侏罗统三角洲砂体发育.岩心和测井上可识别的沉积类型包括分流河道、决口扇、河口坝和远砂坝等,地震反射结构显示出来自西南方向的沉积物进积.砂岩样品的岩矿组成显示,碎屑中存在花岗质成分和酸性火山岩成分.泥岩元素地球化学特征显示其物质成分以长英质为主,推测源区为克拉通或再旋回造山带.砂岩Dickinson图解表明,不仅存在来自克拉通或再旋回造山带的成分,而且存在火山弧造山带的成分.综合分析认为,北黄海盆地东部坳陷西南物源区为再旋回造山带,花岗质成分来自西南盆缘的基底花岗质岩石的风化,而火山岩成分可能是同期火山喷发的产物,也可能是先前火山岩的风化产物.
The comprehensive analysis of provenancesedimentary system and provenance tectonic setting is the basis of oil and gas exploration, the provenancesedimentary system is the main influence factor of the original reservoir. The North Yellow Sea basin is a MesozoicCenozoic transtensional faulted basin located between SuluLinjinjiang orogeny and JiaoLiao uplift. The delta sand deposits developed during the MiddleLate Jurassic have been confirmed by seismic and drilling data in the southwest of eastern sag, the North Yellow Sea basin. Some sedimentary types, including distributary channel, crevasse splay, mouth bar and distal bar, can be recognized in the core rocks and well loggings, and the progradation of sediments in northwestern orientation is shown in the seismic reflection. The analysis of petrology and mineralogy of the sandstone samples indicate that they contain granitic and acid volcanic compositions. The element geochemistry characteristics of the mudstone samples show that their major composition is felsic, and the provenance is the craton or the recycling orogeny. The Dickinson diagram of the sands demonstrates their compositions coming from both the craton or the recycling orogeny and volcanic arc orogeny. We suggest that the southwestern provenance in the eastern sag of the North Yellow Sea basin is the recycling orogeny. The granitic composition comes from the weathered basement granitic rocks, and the volcaniclastics may come from the syneruption, or from weathered preexisting volcanic rocks
珠江口盆地L凹陷裂陷期始新统文昌组沉积充填模式*
Depositional filling model of the Eocene Wenchang Formation in rift stage of L sag, Pearl River Mouth Basin
 [PDF]

贾浪波,纪友亮,钟大康,严锐涛,刘君龙,米立军,易震,余加松,张鹏程
- , 2017, DOI: 10.7605/gdlxb.2017.03.041
Abstract: 珠江口盆地L凹陷始新统文昌组处于勘探初期,钻井资料较少且分布不均,基于多井多资料的常规沉积相研究方法受到限制,对于层序地层和沉积体系没有系统研究,本次研究充分利用地震、测井以及岩心资料,在全区开展地震相研究工作,井震结合对沉积相展布进行研究,建立裂陷期文昌组沉积演化模式。结果表明: L凹陷裂陷期文昌组划分为3个三级层序,8个体系域;根据三级层序体系域内部地震反射外部形态和内部反射特征差异,识别出充填、席状、楔形、块状、丘形5种地震相类型;通过分析岩心相、测井相以及各种地震相特征,井震结合将地震相转为沉积相,识别出辫状河三角洲、扇三角洲、湖相等沉积相;初始裂陷期为小盆小湖模式,凹陷分割性较强,主要为近源扇三角洲粗碎屑沉积,强烈裂陷早期为大盆浅湖模式,洼陷连通,主要为辫状河三角洲沉积,强烈裂陷中晚期为大盆深湖模式,主要对应半深湖泥岩沉积,弱裂陷期主要为大盆浅湖模式,主要对应大规模长轴辫状河三角洲充填沉积体系。
The exploration of the Eocene Wenchang Formation in L sag,Pearl River Mouth Basin,is in the initial-exploration stage. Due to limited drilling data and their uneven distribution,the conventional multiple-data research methods of sedimentary facies is restricted in this area,resulting in the lack of systematic analysis on sequence stratigraphy and depositional system. Based on cores,well logs and seismic data,the integrated seismic facies analysis was carried out in this area. The integration of well and seismic data was applied to predict the distribution of the Paleogene rift sedimentary system,and the sedimentary model of the Wenchang Formation in rift period has been established. The results show that the Wenchang Formation developed three 3rd-order sequences,consisting of 8 system tracts. According to the differences between externel form and internel reflection characteristics in the sequence system tracts,five seismic facies types were identified in the study area,which are filling type,mat type,wedge type,massive type and hummocky type. Seismic facies were converted to sedimentary facies based on the combined analysis of core facies,well-log facies and seismic facies. Braided-river delta,fan delta and lacustrine facies were identified. The study area developed the model of small basin with small lake in the initial syn-rift stage,when several small isolated sags were mostly filled with near-source fan delta clastic deposits. Model of large basin and shallow lake was developed in the early rift-climax stage,when the sags became connected with each other,filled with braided river delta originated from the southwest. Large basin with deep lake model was formed when the tectonic stage entered middle-late rift-climax,therefore deep lake mudstone was widespread. The model of large basin and shallow lake in the late syn-rift stage was developed,when the accommodation was gradually filled by a large-scale braided-river delta originated from the northeast along the long axis of L sag
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