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1.
塔里木盆地满西地区海相油气成藏规律 总被引：4，自引：0，他引：4
满西地区是塔里木盆地海相油气藏的主要富集区之一,侧向运移是该区油气成藏的一个重要特征。该区油气藏的形成和分布主要受控干古隆起背景、东河砂岩优质输导层的展布以及中一新生代(尤其是晚喜马拉雅期)构造变动等三大因素。古隆起背景的存在是该区油气藏形成和富集的关键。研究表明,哈得逊古隆起及其斜坡上倾部位是满西地区油气聚集成藏的最有利地区,石炭系东河砂岩是油气富集的主要层位,东河砂岩地层圈闭和地层一构造复合型圈闭是油气藏形成的主要类型。认为满西地区大中型油气田的勘探应以哈得逊古隆起及其西斜坡为重点。 相似文献
2.
ZHANG DaJiang WANG PeiRong MAO ZhiChao & XU GuanJun Research Institute of Petroleum Exploration & Development PetroChina Beijing China Key Laboratory of Petroleum Geochemistry CNPC Geochemistry Department Yangtze University Jingzhou 《中国科学:地球科学(英文版)》2010,(4)
Twenty-five monoterpanes from six types of essential oils and hydrogenated turpentine oil have been identified and their stable carbon isotope composition determined.Monoterpanes in essential oils sourced from terrestrial higher plants display a δ13C value in the range of-34‰-26‰,and mostly between-29‰ and-27‰.The δ13C value of any single monoterpane is very consistent in different essential oils.Acyclic monoterpanes show closer isotope composition between-28.6‰ and-26.2‰,with an average value of-27.7‰.In contrast,the isotope composition of cyclic monoterpanes is more scattered with an average value of-28.6‰.Isotopic fractionation with 13C enrichment has been observed during both artificial and geological hydrogenation of monoterpenoids to monoterpanes,and this is more obvious for the acyclic monoterpenoids.In addition to higher plants,acyclic monoterpane 2,6-dimethylheptane in crude oil can also be originated from other organic inputs. 相似文献
3.
XIAO Chuantao Jianghan Petroleum Institute Jingzhou Hubei PAN Yuntang Graduate School Academia Sini Beijing Liu Xinzhu 《《地质学报》英文版》1999,73(3):341-347
The Carboniferous system in the Xiaohaizi area, Bachu County, Xinjiang Uygur Autonomous Region, composed of typical mixed terrigenous clastic, carbonate and sulphate sediments, was mainly deposited in the tidal flat and lagoon environments. The mixed sediments occur as the following eleven types: 1. limestone intercalated with siltstone; 2. interbeds of shale and limestone; 3. gypsolyte interbedded with limestone; 4. gypsolyte intercalated with siltstone; 5. gypsolyte interbedded with shale; 6. gypsolyte intercalated with siltstone, limestone and dolomite; 7. siltstone interbedded with gypsolyte and limestone; 8. terrigenous detritus scattered in carbonate matrix; 9. carbonate as cement in clastic rocks; 10. mixed sediments of carbonate and terrigenous mud; 11. mixed sediments of carbonate grains with terrigenous sand. Based on the analysis of the dynamic mechanism of mixed sediments, it is believed that these types of mixed sediments in the study area were controlled by climate, sea level change and so 相似文献
4.
HOU Dujie ZHANG Linye WANG Tieguan Research Centre for Organic Geochemistry Jianghan Petroleum Institute Jingzhou Hubei Applied Geochemistry Section Dept. ofGeosciences China University of Petroleum Changping Beijing Geochemistry Research Section Shengli Petroleum Geological Sciences Institute Shengli Petroleum Administration Bureau Dongying Shandong 《《地质学报》英文版》1998,72(4):399-408
Four typical distribution patterns of pentacyclic triterpenoid hydrocarbons (types A-D) are distinguished in the low-mature source rocks from eastern China. Type A has a relatively high content of pentacyclic triterpenes. It exists in immature sediments and the distribution and abundance of triterpenes vary with the maturity of the sediments. An unknown C30 triterpene (UCT2) has also been detected in very shallow sediments. This compound is very unstable and disappears rapidly with the increase of depth. Type B is characterized by a relatively high amount of 17α(H), 21β(H)-30-homohopane. This kind of distribution pattern is common in coals and terrestrial sediments of low maturity. Type C has a relatively high content of diahopane and neohopane series. The analysis shows that this distribution pattern may have an indirect relationship with the input of higher plants despite its microbial source. There are C30-unconfirmed triterpane (UCT2) and a relatively high content of C35 hopane in type D. The dist 相似文献
5.
油田抽油机的抽油杆幌动幅度过大,是引起抽油杆断裂的一个重要因素,检测这种幌动幅度是防止抽油杆断裂的一种有效手段。设计了一种基于面阵CCD和普通半导体激光器（LD）测量这种幌动的悬点投影测量方法,通过数字卷积滤波,达到了范围为0－40mm,误差＜0.2mm的技术检测指标。 相似文献
6.
塔里木盆地塔中32井中上奥陶统内潮汐沉积 总被引：11，自引：1，他引：11
塔里木盆地塔中32井的中、上奥陶统钻遇厚度为1 462 m。它是一套巨厚的深灰色泥岩、页岩与灰色砂岩、粉砂岩互层夹少量灰岩的地层。其中深灰色泥岩、页岩最多;砂岩和粉砂岩主要分布于上部和下部,中部砂岩和粉砂岩较少;鲕粒灰岩数量少,主要夹于深灰色泥页岩中。这些砂岩和鲕粒灰岩既可单独成层,但更常见它们与深灰色泥页岩组合成薄互层。薄互层中发育脉状、波状和透镜状层理,并普遍发育交错层理和双向交错纹理。这些特征表明砂岩和鲕粒灰岩为深水斜坡上的内潮汐沉积的产物。这些内潮汐沉积进一步划分为4种类型：双向交错纹理细砂岩型、单向交错层和双向交错纹理中-细砂岩型、韵律性砂泥岩薄互层型和鲕粒灰岩型。它们具有5种垂向沉积层序,在剖面上常形成多旋回韵律性沉积组合。 相似文献
7.
ZHAO Jingzhou CAO Qing BAI Yubin ER Chuang LI Jun WU Weitao and SHEN Wuxian 《《地质学报》英文版》2015,89(Z1):303-306
<正>1 Introduction Petroleum accumulations from the Earth’s crust can be grouped into conventional and unconventional ones.The history of the world’s petroleum exploration is a history from the exploration of conventional accumulations to that of unconventional ones.Nevertheless,petroleum accumulation is actually a contrary process starting from 相似文献
8.
流体包裹体热动力学（PVTx）模拟应用包裹体组分、均一温度和气液比,结合模拟软件可以恢复包裹体被捕获时的古流体压力,以松辽盆地齐家地区高台子致密油层为例,应用激光共聚焦扫描显微镜、显微荧光和显微测温等分析,划分了油气充注幕次并恢复了各幕次流体古压力,该应用有效区分了不同幕次流体古压力特征。研究结果表明:齐家地区高台子油层存在两期油气充注,第1期发生在晚白垩世嫩江晚期（79~75 Ma）,主要充注发黄色荧光的原油,古流体压力为16.13~16.97 MPa;第2期发生在晚白垩世明水期（69~65 Ma）,主要充注发黄绿色、蓝绿色荧光颜色的原油,古流体压力为22.14~26.13 MPa。研究结果有助于深化勘探区油气成藏规律的认识。 相似文献
9.
库车前陆褶皱冲断带自北向南可分为基底冲断带、箱状背斜带、梳状背斜带和挠曲褶皱带,东西方向上可分为西段、中段和东段。本文分段叙述了各变形带的变形特征,指出东段箱状背斜带不发育,秋里塔格山脉(构造带)东延未进入东段,因而总体看自西向东变形强度减弱,地形上趋于夷平。该冲断带的形成经历了两次重大的冲断活动,分别发生在中新世和早(-中)更新世;相应地,该带可分为南、北两个\"盆\"\"山\"亚系统,两者在地层记录、变形期次和变形机制上尚有若干差异。库车前陆褶皱冲断带的发育,除了受南天山的冲断和向南扩展引起的近南北向挤压应力场控制外,还受到基底断裂在新生代的活化和膏盐层底辟的制约,前者以近北西向的构造变换带及其共轭发育的近北东向断层最为重要,后者既控制了秋里塔格山脉的形成(主要受垂直的挤压应力场作用),也在库车前陆褶皱冲断带东西方向的变形分段中起了重要作用。文章还讨论了变形与地貌发育的关系和在油气勘探中的指导意义。 相似文献
10.
为查明鄂尔多斯盆地北部上古生界石盒子组沉积物源及构造背景,通过常规薄片统计、重矿物及其组合特征、石英颗粒阴极发光、全岩主量及微量元素分析以及锆石U-Pb测年(LA-ICP-MS)等方法对研究区物源进行系统研究.结果显示,碎屑组成、重矿物、石英颗粒阴极发光等矿物、岩石学特征均表明研究区石盒子组盒8段沉积物源来自北部,且自东向西平面分区明显,指示存在多个并列的古水系提供物源.球粒陨石标准化的稀土配分模式图显示,北部露头区和盆地内样品二者REE配分曲线形态一致,均显示轻稀土略富集、中等负Eu异常的右倾模式,反映二者物质组成的继承性,与矿物岩石学揭示的物源来自北部蚀源区相吻合.主量元素SiO2-K2O/Na2O、K2O/Na2O-SiO2/Al2O3、TFe2O3+MgO-TiO2判别图及微量元素Th/Sc、Th/U等比值及构造背景判别图显示物源区兼具活动陆缘、被动陆缘和岛弧构造背景,这种复杂的构造背景与鄂尔多斯陆块北缘与阴山陆块碰撞对接时所表现出的复杂构造背景相一致.北缘隆起带的多次旋回性抬升,形成北部再旋回造山带物源.北部露头区变质岩和火成岩的锆石年龄及盆地内石盒子组砂岩碎屑锆石U-Pb测年显示,二者峰值年龄为2.0～1.8 Ga,2.4～2.2 Ga,都集中在元古宙.碎屑锆石最年轻年龄为295.8±3.6 Ma,这一年龄说明沉积作用发生在早二叠世之后,即北缘古亚洲洋关闭后的隆起剥蚀阶段.锆石测年结果2.0～1.8 Ga和2.4～2.2 Ga峰值年龄与近年来对西部陆块孔兹岩系的同位素测年结果相吻合.综合以上分析,显示各个方面互相印证,重建出当时有多个并列古水系,从北部蚀源区向盆地盒8段提供物源. 相似文献
