基于16S r RNA基因,采用Illumina Mi Seq高通量测序技术分析和比较了涠洲油气田开发区表层海水和沉积物中微生物群落结构。Shannon多样性指数表明涠洲油气田微生物多样性较高,并且表层海水的微生物多样性要高于沉积物。表层海水中微生...基于16S r RNA基因,采用Illumina Mi Seq高通量测序技术分析和比较了涠洲油气田开发区表层海水和沉积物中微生物群落结构。Shannon多样性指数表明涠洲油气田微生物多样性较高,并且表层海水的微生物多样性要高于沉积物。表层海水中微生物以芽孢杆菌Bacilli居多,其次为蓝细菌Cyanobacteria、α变形菌Alphaproteobacteria和γ变形菌Gammaproteobacteria;而沉积物中微生物群落主要类群为γ变形菌。维恩图表明涠洲油气田表层海水的微生物组成或沉积物的微生物组成各自具有一定的相似性,热图和主成分分析则发现该两类环境介质之间的微生物结构差异较大。Illumina Mi Seq高通量测序还发现涠洲油气田存在潜在石油类降解菌假单胞菌属Pseudomonas、鞘氨醇单胞菌属Sphingomonas、红球菌属Rhodococcus和分枝杆菌属Mycobacterium,并且沉积物中该四类微生物相对比例要高于表层海水,这一现象可能由环境中石油类含量决定。研究将为评价油气开发活动对微生物群落的影响提供依据,并为海洋环境中石油污染的生物修复提供基础数据。展开更多
The oblique transfer zone in the Fushan Sag, a syndepositional dome sandwiched between the Bailian and Huangtong sub-sags, has been the most important exploration target. The major oil observation occurs in the E_2l_1...The oblique transfer zone in the Fushan Sag, a syndepositional dome sandwiched between the Bailian and Huangtong sub-sags, has been the most important exploration target. The major oil observation occurs in the E_2l_1^(L+M) and the E_2l_3~U. 46 oil and rock samples reveal that the oil in the transfer zone is mostly contributed by the Bailian sub-sag, though the source rock conditions, hydrocarbon generation and expulsion histories of the Bailian and Huangtong sub-sags are similar. The E_2l_3~U oil, characterized by high maturity, Pr/Ph ratio and oleanane/C_(30)-hopane ratio, shows a close genetic affinity with the E_2l_3~b source rocks, while the E_2l_1^(L+M) oil, characterized by lower maturity, Pr/Ph ratio and oleanane/C_(30)-hopane ratio, is suggested to be derived from the E_2l_(1+2)~b source rocks. The homogenization temperatures of aqueous fluid inclusions, taking the burial history of the reservoirs into account, reflect that the oil charge mainly occurred from mid-Miocene to Pliocene in the oblique transfer zone. The oil transporting passages include connected sand bodies, unconformities and faults in the Fushan Sag. Of these, the faults are the most complicated and significant. The faults differ sharply in the west area, the east area and the oblique transfer zone, resulting in different influence on the oil migration and accumulation. During the main hydrocarbon charge stage, the faults in the west area are characterized by bad vertical sealing and spatially dense distribution. As a result, the oil generated by the Huangtong source rocks is mostly lost along the faults during the vertical migration in the west area. This can be the mechanism proposed to explain the little contribution of the Huangtong source rocks to the oil in the oblique transfer zone. Eventually, an oil migration and accumulation model is built in the oblique transfer zone, which may provide theoretical and practical guides for the oil exploration.展开更多
Petroleum industry plays an important role in both the Chinese and Russian economy.Petroleum cooperation between the two countries continue to accelerate since China opening wider to the outside world, and Chinese oil...Petroleum industry plays an important role in both the Chinese and Russian economy.Petroleum cooperation between the two countries continue to accelerate since China opening wider to the outside world, and Chinese oil companies have increased their presence in Russia. Sino–Russia joint-ventures, oil & gas trade has progressed smoothly, there is a better future for cooperation in oil & gas development in Russian Far Eastern region. Chinese and Russian companies will continue to benefit from collaboration in petroleum industry.展开更多
文摘基于16S r RNA基因,采用Illumina Mi Seq高通量测序技术分析和比较了涠洲油气田开发区表层海水和沉积物中微生物群落结构。Shannon多样性指数表明涠洲油气田微生物多样性较高,并且表层海水的微生物多样性要高于沉积物。表层海水中微生物以芽孢杆菌Bacilli居多,其次为蓝细菌Cyanobacteria、α变形菌Alphaproteobacteria和γ变形菌Gammaproteobacteria;而沉积物中微生物群落主要类群为γ变形菌。维恩图表明涠洲油气田表层海水的微生物组成或沉积物的微生物组成各自具有一定的相似性,热图和主成分分析则发现该两类环境介质之间的微生物结构差异较大。Illumina Mi Seq高通量测序还发现涠洲油气田存在潜在石油类降解菌假单胞菌属Pseudomonas、鞘氨醇单胞菌属Sphingomonas、红球菌属Rhodococcus和分枝杆菌属Mycobacterium,并且沉积物中该四类微生物相对比例要高于表层海水,这一现象可能由环境中石油类含量决定。研究将为评价油气开发活动对微生物群落的影响提供依据,并为海洋环境中石油污染的生物修复提供基础数据。
基金Project(41272122)supported by the National Natural Science Foundation of China
文摘The oblique transfer zone in the Fushan Sag, a syndepositional dome sandwiched between the Bailian and Huangtong sub-sags, has been the most important exploration target. The major oil observation occurs in the E_2l_1^(L+M) and the E_2l_3~U. 46 oil and rock samples reveal that the oil in the transfer zone is mostly contributed by the Bailian sub-sag, though the source rock conditions, hydrocarbon generation and expulsion histories of the Bailian and Huangtong sub-sags are similar. The E_2l_3~U oil, characterized by high maturity, Pr/Ph ratio and oleanane/C_(30)-hopane ratio, shows a close genetic affinity with the E_2l_3~b source rocks, while the E_2l_1^(L+M) oil, characterized by lower maturity, Pr/Ph ratio and oleanane/C_(30)-hopane ratio, is suggested to be derived from the E_2l_(1+2)~b source rocks. The homogenization temperatures of aqueous fluid inclusions, taking the burial history of the reservoirs into account, reflect that the oil charge mainly occurred from mid-Miocene to Pliocene in the oblique transfer zone. The oil transporting passages include connected sand bodies, unconformities and faults in the Fushan Sag. Of these, the faults are the most complicated and significant. The faults differ sharply in the west area, the east area and the oblique transfer zone, resulting in different influence on the oil migration and accumulation. During the main hydrocarbon charge stage, the faults in the west area are characterized by bad vertical sealing and spatially dense distribution. As a result, the oil generated by the Huangtong source rocks is mostly lost along the faults during the vertical migration in the west area. This can be the mechanism proposed to explain the little contribution of the Huangtong source rocks to the oil in the oblique transfer zone. Eventually, an oil migration and accumulation model is built in the oblique transfer zone, which may provide theoretical and practical guides for the oil exploration.
文摘Petroleum industry plays an important role in both the Chinese and Russian economy.Petroleum cooperation between the two countries continue to accelerate since China opening wider to the outside world, and Chinese oil companies have increased their presence in Russia. Sino–Russia joint-ventures, oil & gas trade has progressed smoothly, there is a better future for cooperation in oil & gas development in Russian Far Eastern region. Chinese and Russian companies will continue to benefit from collaboration in petroleum industry.
