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霸县凹陷古近系烃源岩生物标志化合物特征及对油气成藏的贡献 被引量:5
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作者 王权 王道军 +5 位作者 邹华耀 郭柳汐 杨帆 殷杰 贾小军 芦晓伟 《油气地质与采收率》 CAS CSCD 北大核心 2017年第6期17-24,共8页
综合利用地球化学、测井、地震等资料研究霸县凹陷烃源岩的生烃潜力、有机质类型、母质来源及沉积保存条件。根据烃源岩与原油的生物标志化合物参数特征进行油源对比,厘清各套烃源岩对油气成藏的贡献。研究结果表明,霸县凹陷发育沙四段... 综合利用地球化学、测井、地震等资料研究霸县凹陷烃源岩的生烃潜力、有机质类型、母质来源及沉积保存条件。根据烃源岩与原油的生物标志化合物参数特征进行油源对比,厘清各套烃源岩对油气成藏的贡献。研究结果表明,霸县凹陷发育沙四段、沙三段下亚段及中亚段、沙一段下亚段4套烃源岩,具有生排烃潜力大、有机质类型好的特点,且均已进入生烃门限。其中,沙四段和沙三段下亚段、中亚段烃源岩分布较广,沙一段下亚段烃源岩仅分布于研究区南部地区。生物标志化合物参数分析结果揭示,研究区4套烃源岩的有机质输入与沉积保存条件存在差异,沙四段和沙三段下亚段有机质供应相对于沙三段中亚段和沙一段下亚段充足,但是沉积保存条件却相对较差。通过油源对比发现,霸县凹陷的原油可以分为3类单源油及2类混源油,沙三段下亚段和中亚段烃源岩是现今已发现油藏的主力贡献烃源岩,沙四段烃源岩的有机质丰度较高、生烃潜力大,但已发现以沙四段烃源岩提供油源的油藏多呈近源零星分布于深层及潜山,表明霸县凹陷以沙四段烃源岩为油源的深层及潜山油藏应具有较大的勘探潜力。 展开更多
关键词 烃源岩生物 标志化合物 油源对比 成藏贡献 霸县凹陷
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方正断陷烃源岩评价与油源对比 被引量:2
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作者 何星 李映雁 冯子辉 《内江科技》 2011年第1期138-139,共2页
方正断陷白垩系烃源岩有机质丰度较高,为好烃源岩,但白垩系样品数相对较少。古近系新安村组和乌云组为较好-好烃源岩,样品数也多,分析判断比较可信。总体来说方正断陷的有机质类型为ⅡA-ⅡB型。新安村组和乌云组烃源岩属于未成熟-低成... 方正断陷白垩系烃源岩有机质丰度较高,为好烃源岩,但白垩系样品数相对较少。古近系新安村组和乌云组为较好-好烃源岩,样品数也多,分析判断比较可信。总体来说方正断陷的有机质类型为ⅡA-ⅡB型。新安村组和乌云组烃源岩属于未成熟-低成熟阶段,白垩系烃源岩进入成熟阶段。白垩系在1715.7m深度以下的烃源岩都可进入生油阶段。方8井C15正构烷烃分布曲线上可以看+出白垩系泥岩和新安村组原油有着良好的匹配关系,新安村组原油与新安村组和乌云组泥岩差异明显。新安村组原油与白垩系泥岩的萜烷M/Z191和甾烷M/Z217质量色谱图具有很强的相似性,可以认定新安村组原油可由白垩系泥岩生成。 展开更多
关键词 烃源有机碳生物标志化合物甾烷油源对比
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Geobiological approach to evaluating marine carbonate source rocks of hydrocarbon 被引量:7
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作者 YIN HongFu XIE ShuCheng +5 位作者 YAN JiaXin HU ChaoYong HUANG JunHua Tenger QIE WenKun QIU Xuan 《Science China Earth Sciences》 SCIE EI CAS 2011年第8期1121-1135,共15页
Evaluating the pre-Jurassic marine source rocks in China has been difficult because these rocks are generally too highor over-maturated for most traditional methods to work.As to the remaining parameter TOC (%),its lo... Evaluating the pre-Jurassic marine source rocks in China has been difficult because these rocks are generally too highor over-maturated for most traditional methods to work.As to the remaining parameter TOC (%),its lower limit for recognizing the carbonate source rocks in China has been in dispute.Nineteen Phanerozoic sections in the Middle-Upper Yangtze Platform and the Guizhou-Hunan-Guangxi Basin have been studied in search for a different approach to complementing the traditional evaluation method for these source rocks.We have applied a geobiological approach to tracing the organic carbon (OC) output and accumulation from the living stage (primary productivity) to the post-mortem deposited remains,and finally to the preserved burial organics.Four biological and geological parameters are employed to represent the OC of the three stages.A series of proxies of these parameters are discussed and integrated to establish a geobiological evaluation system independent of TOC and other traditional methods.Here we use the Guangyuan section in Sichuan as an example for the geobiological evaluation.Our results indicate that in the argillaceous rocks,the geobiological parameters show the qualified source rocks in accordance with high TOC values;but in the carbonates,the good source rocks delineated by the geobiological parameters have a wide range of TOC,from 0.03% to 1.59%,mostly<0.3%.We suggest that it is still premature to set TOC=0.3% or 0.5% as the lower limit for the pre-Jurassic carbonate source rocks in South China. 展开更多
关键词 geobiological evaluation carbonate source rocks parameters PROXIES
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Depositional environment of terrestrial petroleum source rocks and geochemical indicators in the Songliao Basin 被引量:9
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作者 FENG ZiHui FANG Wei +5 位作者 LI ZhenGuang WANG Xue HUO QiuLi HUANG ChunYan ZHANG JuHe ZENG HuaSen 《Science China Earth Sciences》 SCIE EI CAS 2011年第9期1304-1317,共14页
To determine geochemical indicators for depositional environment favored by terrestrial petroleum source rocks, we selected 40 source rock samples from the Late Cretaceous Qingshankou Formation (Kzqn) and the first ... To determine geochemical indicators for depositional environment favored by terrestrial petroleum source rocks, we selected 40 source rock samples from the Late Cretaceous Qingshankou Formation (Kzqn) and the first member of Nenjiang Formation (K2n1) in the Songliao Basin to qualify saturate fraction and aromatic fraction using GC-HRT (gas chromatography high resolution time-of-flight mass spectrometry) and quantify important biomarkers using GC-MS. The results reveal that source rocks from the 1st member of Qingshankou Formation (K2qn1) are characterized by not only high contents of terpanes, regular steranes and 4-methylsteranes but also high contents of dinosteranes, C31 steranes and aryl isoprenoids. Presence of specific biomarkers like elementary sulfur and lanostanes indicates a depositional environment of lagoon characterized by water stratification and high salinity. In the 2nd-3rd members of Qingshankou Formation (K2qn2+3), source rocks contain lower contents of biomarkers, indicating a depositional environment of shallow fresh-water lake delta. Source rocks in the K2n1 contain high contents of terpanes, regular steranes and 4-methylsteranes but lower contents of dinosteranes, C31 steranes and aryl isoprenoids, indicating a depositional environment of fresh-brackish open lake characterized by low salinity and poor water stratification, where organic matter is seriously altered by bacteria. Overall analysis shows that primary geochemical indicators for terrestrial petroleum source rocks are as follows: 1) C30 hopanes 〉 1500 ppm; 2) gammacerane 〉190 ppm; 3) C27 steranes 〉200 ppm; 4) 4-methylsteranes 〉 100 ppm; 5) aryl isoprenoids 〉 3 ppm; 6) dehydroxyl-vitamin E 〉 10 ppm. 展开更多
关键词 Songliao Basin source rock depositional environment GEOCHEMISTRY BIOMARKER
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The geobiological formation process of the marine source rocks in the Middle Permian Chihsia Formation of South China 被引量:5
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作者 LIU XiTing YAN JiaXin +2 位作者 XUE WuQiang MA ZhiXin LI Bo 《Science China Earth Sciences》 SCIE EI CAS 2014年第5期957-964,共8页
The Chihsia Formation is one of the four sets of regional marine hydrocarbon source rocks from South China.In the past two decades,detailed geochemical and sedimentological studies have been carried out to investigate... The Chihsia Formation is one of the four sets of regional marine hydrocarbon source rocks from South China.In the past two decades,detailed geochemical and sedimentological studies have been carried out to investigate its origination,which have demonstrated that the high primary productivity plays a primary role in the deposition of sediments enriched in the organic matter.However,the mechanism of this high productivity and the path of the deposition and burial of the organic matter have always been a mystery.Based on the previous studies on the Shangsi Section in Guangyuan City,Sichuan Province,we proposed that the development of the equatorial upwelling due to the sea level rise is responsible for the relatively high productivity in the Chihsia Formation.The sea waters with high nutrient were transported by the sub-surface currents along the equator.High organic carbon flux was deposited on the deeper shelf,and then decomposed by bacteria,leading to the occurrence of anaerobic respiration.The metabolism of the microorganisms consumed the dissolved oxygen in waters,which was in favor of the preservation of the organic matter.This suggested geobiological model integrating with paleoclimatology,paleoceanography and geomicrobiology will help us to understand the causes of this particular sedimentary sequence. 展开更多
关键词 Chihsia Formation source rocks primary productivity paleo-oxygenation facies GEOBIOLOGY South China
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Geobiological processes of the formation of lacustrine source rock in Paleogene 被引量:12
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作者 LI GuoShan WANG YongBiao +4 位作者 LU ZongSheng LIAO Wei SONG GuoQi WANG XueJun XU XingYou 《Science China Earth Sciences》 SCIE EI CAS 2014年第5期976-987,共12页
Gypsum-salt rocks and coccolith calcareous shale are widely deposited in the lower part of the Paleogene Shahejie Formation in the Dongying Sag, Sbandong Province. The gypsum-salt rock is believed to be formed during ... Gypsum-salt rocks and coccolith calcareous shale are widely deposited in the lower part of the Paleogene Shahejie Formation in the Dongying Sag, Sbandong Province. The gypsum-salt rock is believed to be formed during the earlier deposition in salt lake, while the overlying coccolith shale in saline lake with relatively low salinity. By comparing the lake environment and la- custrine microbial communities between ancient and recent lakes, cyanobacteria are regarded as the main representative of productivity during the formation of gypsum-salt strata series, with the annual productivity of 1500-2000 gC m-2 yr1. Based on the research of ultramicrofossils in the calcareous shale, coccolith is considered as the main contributor to the productivity during the formation of calcareous shale. On the basis of statistic data of sedimentary rates, shale laminations, and coccolith fossils in each lamination, the quantitative value of productivity is calculated, with the annual productivity of 2250 3810 gC m 2 yr-1 (averagely 3120 gC m-2 yr-1). Statistic data of large amount of pyrite framboids indicate that the lower water col- umn was persistently in sulfidic or anoxic conditions during the deposition of gypsum-salt strata series, but it changed to be dysoxic when the coccolith calcareous shale was deposited. Both of these water conditions are favorable for the preservation of organic matter. It is estimated that the organic carbon burial efficiency of the Lower Paleogene salt lakes and saline lakes of Dongying Depression is about 10%-15%, which is calculated and analyzed using the multi-parameter geobiological model. 展开更多
关键词 source rock GEOBIOLOGY paleo-oxygenation facies PALEOGENE Dongying Sag
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