湘西北下志留统龙马溪组页岩气成藏条件及有利区分析     

叶见玲  李志能 《中国煤炭地质》2014,(6):10-14,17

湘西北地区下志留统龙马溪组发育富含有机质页岩。通过野外露头地质剖面、钻井及有机地球化学等资料分析,认为泥页岩厚度较大,有机质类型较好、有机碳含量较高、热演化程度适中、储层物性好、埋深适宜及保存条件相对较好,满足页岩气成藏要求。根据页岩气资源潜力评价方法与有利区优选标准,选定桑植-石门复向斜一带为页岩气的有利勘探区域。  相似文献   

中美页岩气开采技术专利地图研究     

李明  张喜征  黎光明  龚玉红  邢立杰 《中国煤炭地质》2014,(12):11-16

以汤森路透公司（Thomson Reuters）的TI（Thomson innovation）技术专利库为数据源,基于页岩气核心技术关键词比较得出中美两国页岩气开采技术生命周期走势、核心技术专利组合、技术研发差距及技术路径,用专利地图工具为我国页岩气开采技术路径提出建议：1用编组化的车载装备克服地面工程多山缺水的环境瓶颈;2）用工厂化的地面工程实现页岩气资源的规模运营与综合开采;3用生态化的水平井控制立法消除环保隐患;4用柔性化的管理技术解决井工厂重复压裂及气井频繁开合等现实问题。  相似文献   

阿尔金山前下—中侏罗统页岩气成藏地质条件分析          下载免费PDF全文

陈夷  杜治利  康志宏  田亚 《中国地质调查》2014,6(4):40-50

阿尔金山前侏罗系出露大套厚层的暗色泥页岩,生烃潜力优越,具备陆相页岩气形成条件,是有利的勘探接替区。通过野外地质调查、样品采集和测试分析,研究下—中侏罗统泥页岩的沉积展布、有机地球化学特征及储集性能,并探讨了该区页岩气的勘探潜力。研究表明: 富有机质泥页岩主要处于滨浅湖—半深湖相、沼泽相沉积环境中,其在平面上呈NE向展布,单层厚度和累计厚度均较大; 泥页岩的有机质类型主要为Ⅱ₁、Ⅱ₂型干酪根; TOC含量为0.55%~10%,平均为2.28%; 镜质体反射率(R_o)为1.0%~1.6%,平均为1.269%,处于成熟—高成熟阶段,为页岩气藏形成提供良好的生烃条件; 其矿物特征表现为脆性矿物含量高,大于51%,有利于后期的水力压裂改造和页岩气开采; 通过扫描电镜观察,泥页岩储层发育微孔隙及微裂缝,为页岩气提供了良好的储集空间和运移通道。初步预测,后期改造相对较弱的月牙山地区为页岩气勘探的有利目标区。  相似文献   

西藏伦坡拉盆地丁青湖组油页岩地球化学特征及其地质意义     

谢尚克  杜佰伟  王剑  董宇 《岩石矿物学杂志》2014,33(3):503-510

对伦坡拉盆地丁青湖组油页岩进行了系统采样和地球化学分析,结果显示该地区油页岩SiO₂含量整体较低,K₂O/Na₂O值较高,Al₂O₃+Fe₂O₃为6.43%～10.28%,Al₂O₃/（Na₂O+K₂O）为1.7～4.91,含有一定的铁镁质组分和较多的稳定组分;化学蚀变指数CIA为65～85,Th/U值多集中在0.97～3.38,表明油页岩源区经历了相对中等的风化作用,反映温暖、湿润的气候条件;Sr/Ba值为0.45～0.82,V/（V+Ni）值为0.46～0.68,Th/U平均值为0.59,表明丁青湖组油页岩形成于淡水缺氧的湖泊之中。温暖湿润的气候、丰富的生物来源及淡水缺氧的沉积环境是伦坡拉盆地丁青湖组油页岩形成的重要条件。  相似文献   

Geological Conditions and Prospect Forecast of Shale Gas Formation in Qiangtang Basin,Qinghai-Tibet Plateau     

YU Yuanjiang  ZOU Caineng  DONG Dazhong  WANG Shejiao  LI Jianzhong  YANG Hu  LI Denghu  LI Xinjing  WANG Yuman  HUANG Jinliang 《《地质学报》英文版》2014,88(2):598-619

The presence of shale gas has been confirmed in almost every marine shale distribution area in North America.Formation conditions of shale gas in China are the most favorable for marine,organic-rich shale as well.But there has been little research focusing on shale gas in Qiangtang Basin,Qinghai-Tibet Plateau,where a lot of Mesozoic marine shale formations developed.Based on the survey results of petroleum geology and comprehensive test analysis data for Qinghai-Tibet Plateau,for the first time,this paper discusses characteristics of sedimentary development,thickness distribution,geochemistry,reservoir and burial depth of organic-rich shale,and geological conditions for shale gas formation in Qiangtang Basin.There are four sets of marine shale strata in Qiangtang Basin including Upper Triassic Xiaochaka Formation （T3x）,Middle Jurassic Buqu Formation （J2b）,Xiali Formation （J2x） and Upper Jurassic Suowa Formation （J3s）,the sedimentary types of which are mainly bathyal-basin facies,open platform-platform margin slope facies,lagoon and tidal-fiat facies,as well as delta facies.By comparing it with the indicators of gas shale in the main U.S.basins,it was found that the four marine shale formations in Qiangtang Basin constitute a multi-layer distribution of organic-rich shale,featuring a high degree of thickness and low abundance of organic matter,high thermal evolution maturity,many kinds of brittle minerals,an equivalent content of quartz and clay minerals,a high content of feldspar and low porosity,which provide basic conditions for an accumulation of shale gas resources.Xiaochaka Formation shale is widely distributed,with big thickness and the best gas generating indicators.It is the main gas source layer.Xiali Formation shale is of intermediate thickness and coverage area,with relatively good gas generating indicators and moderate gas formation potential.Buqu Formation shale and Suowa Formation shale are of relatively large thickness,and covering a small area,with poor gas generating indicators,and limited gas formation potential.The shale gas geological resources and technically recoverable resources were estimated by using geologic analogy method,and the prospective areas and potentially favorable areas for Mesozoic marine shale gas in Qiangtang Basin are forecast and analyzed.It is relatively favorable in a tectonic setting and indication of oil and gas,shale maturity,sedimentary thickness and gypsum-salt beds,and in terms of mineral association for shale gas accumulation.But the challenge lies in overcoming the harsh natural conditions which contributes to great difficulties in ground engineering and exploration,and high exploration costs.  相似文献   

Geological Features and Reservoiring Mode of Shale Gas Reservoirs in Longmaxi Formation of the Jiaoshiba Area   总被引：2，自引：0，他引：2  

GUO Xusheng  HU Dongfeng  LI Yuping  LIU Ruobing  WANG Qingbo 《《地质学报》英文版》2014,88(6):1811-1821

Abstract: This study is based on the sedimentation conditions, organic geochemistry, storage spaces, physical properties, lithology and gas content of the shale gas reservoirs in Longmaxi Formation of the Jiaoshiba area and the gas accumulation mode is summarized and then compared with that in northern America. The shale gas reservoirs in the Longmaxi Formation in Jiaoshiba have good geological conditions, great thickness of quality shales, high organic content, high gas content, good physical properties, suitable depth, good preservation conditions and good reservoir types. The quality shales at the bottom of the deep shelf are the main target interval for shale gas exploration and development. Shale gas in the Longmaxi Formation has undergone three main reservoiring stages: the early stage of hydrocarbon generation and compaction when shale gas reservoirs were first formed; the middle stage of deep burial and large-scale hydrocarbon generation, which caused the enrichment of reservoirs with shale gas; the late stage of uplift, erosion and fracture development when shale gas reservoirs were finally formed.  相似文献   

桦甸市公郎头区丰泰油页岩矿周边老窿积水调查     

任光  刘帅 《吉林地质》2014,(3):142-144

吉林省桦甸市公郎头区丰泰油页岩矿区赋存有13个油页岩层,地质条件简单,采空区位于桦甸市公郎头煤矿(桦甸油页岩二矿)矿区范围内第2、4、6、7层采空区与丰泰矿4、5、6层采空区,与部分巷道相连通,从未发生过涌水现象,说明目前不存在老窿积水问题。  相似文献   

鄂尔多斯盆地长_7油层组与张家滩页岩的关系     

黄同超  ;王平  ;张志升  ;张金良 《陕西地质》2014,(1):50-53

鄂尔多斯盆地内中—晚三叠世形成的一套河—湖相沉积物的含油气层系的延长群含油气层系,由十个油层组(长1-长10)组成,其中长7油层组位于张家滩页岩之上,为胡家村组的下段,张家滩页岩的层位是铜川组的顶部,与其对应的是长8油层组。  相似文献   

甘肃省页岩气资源潜力及勘查开发浅析          下载免费PDF全文

马国林  王德祖  胡思虎 《甘肃地质》2014,23(4):9-12

近年来国家出台的一系列页岩气勘查开发的政策和规范,将促进我国页岩气资源勘探开发快速健康发展。甘肃省页岩气的烃源岩有4套,分别为石炭—二叠系海陆交互相烃源岩、上三叠统陆相烃源岩、中下侏罗统陆相烃源岩、下白垩统烃源岩,页岩气赋存与煤炭资源赋存关联度高,武腾盆地、旦马盆地、鄂尔多斯盆地、民和盆地、潮水盆地页岩有机碳含量（TOC）、热成熟度（R0）高,烃源岩厚度较大,具有较好的资源潜力,其页岩气勘查开发工作应分阶段尽早实施。  相似文献   

川西陆相页岩气录井综合评价     

李一超 《四川地质学报》2014,(4):555-557

常规录井难以全面识别评价页岩气,本文结合区域地质特征,分析了录井的难点,利用XRF元素录井、XRD矿物录井、岩石热解地化录井、泥页岩密度录井等技术,开展页岩气的岩石成分分析、脆性评价、含气性评价、地层压力评价等关键技术研究,初步形成了工区内陆相须家河组五段的页岩气录井综合评价技术,建立了相应的录井评价标准,并在页岩气专层井XY2井中上井应用,取得了较好的应用效果。  相似文献