Conditions for the Formation of oil and gas pools in Tertiary volcanics in the western part of the Huimin sag, Shandong and then (?)stribution have been studied based on the geological, seismic and well-logging inform...Conditions for the Formation of oil and gas pools in Tertiary volcanics in the western part of the Huimin sag, Shandong and then (?)stribution have been studied based on the geological, seismic and well-logging information. In this paper, the types and lithofacies of the volcanic rocks in the western part of the Huimin sag are described; the relationship between rocks and electrical properties, the seismic reflection structures, the development and distribution of the volcanic rocks are expounded; and the fourfold role of the volcanic activities in the formation of the oil and gas pools is also dealt with. It is considered by the authors that the volcanic activities were not destructive to the formation of oil and gas pools but a factor favourable to the accumulation of organic matters and their conversion to hydrocarbon. The volcanic rocks might have served as reservoir rocks and cap rocks, or as a synsedimentary anticline. The prerequisites and important factors for the formation of oil and gas pools and their distribution are pointed out in the paper.展开更多
Many scholars carried out large quantity of researches on oil and gas preservative condi-tions of marine carbonate rocks from the aspects of cap rocks,faults,formation water,hydrodynamic,and tectonism.This article giv...Many scholars carried out large quantity of researches on oil and gas preservative condi-tions of marine carbonate rocks from the aspects of cap rocks,faults,formation water,hydrodynamic,and tectonism.This article gives dynamic evaluation on oil and gas preservative conditions of marine stratum in Jianghan（江汉） plain of multiphase tectonic disturbance from the view of paleofluid geo-chemistry.The conclusion shows that there mainly existed fluid filling of two periods in the reservoir of Lower-Middle Triassic to Permian.The fluid filled in the earlier period came from Lower Palaeozoic.The interchange of fluid in Lower-Middle Triassic to Permian suggested the oil and gas in Lower Pa-laeozoic had been broken up.The fluid filled in the later period（Lower-Middle Triassic to Permian） came from the same or adjacent strata and lacked anatectic fluidogenous features coming from Palaeozoic.With good preservative conditions of bulk fluid at the time,the fluid of Lower-Middle Triassic to Permian and that of Lower Palaeozoic did not connect with each other.However,the hydrocarbon generation peak of marine source rocks had passed or the paleo-oil and gas reser-voirs had been destroyed at that time and the marine stratum of Palaeozoic to Triassic in the research area did not put out commercial oil and gas flow.展开更多
文摘Conditions for the Formation of oil and gas pools in Tertiary volcanics in the western part of the Huimin sag, Shandong and then (?)stribution have been studied based on the geological, seismic and well-logging information. In this paper, the types and lithofacies of the volcanic rocks in the western part of the Huimin sag are described; the relationship between rocks and electrical properties, the seismic reflection structures, the development and distribution of the volcanic rocks are expounded; and the fourfold role of the volcanic activities in the formation of the oil and gas pools is also dealt with. It is considered by the authors that the volcanic activities were not destructive to the formation of oil and gas pools but a factor favourable to the accumulation of organic matters and their conversion to hydrocarbon. The volcanic rocks might have served as reservoir rocks and cap rocks, or as a synsedimentary anticline. The prerequisites and important factors for the formation of oil and gas pools and their distribution are pointed out in the paper.
基金supported by the Major Project of Chinese National Programs for Fundamental Research and Development 973 Program (No. 2012CB214805)
文摘Many scholars carried out large quantity of researches on oil and gas preservative condi-tions of marine carbonate rocks from the aspects of cap rocks,faults,formation water,hydrodynamic,and tectonism.This article gives dynamic evaluation on oil and gas preservative conditions of marine stratum in Jianghan（江汉） plain of multiphase tectonic disturbance from the view of paleofluid geo-chemistry.The conclusion shows that there mainly existed fluid filling of two periods in the reservoir of Lower-Middle Triassic to Permian.The fluid filled in the earlier period came from Lower Palaeozoic.The interchange of fluid in Lower-Middle Triassic to Permian suggested the oil and gas in Lower Pa-laeozoic had been broken up.The fluid filled in the later period（Lower-Middle Triassic to Permian） came from the same or adjacent strata and lacked anatectic fluidogenous features coming from Palaeozoic.With good preservative conditions of bulk fluid at the time,the fluid of Lower-Middle Triassic to Permian and that of Lower Palaeozoic did not connect with each other.However,the hydrocarbon generation peak of marine source rocks had passed or the paleo-oil and gas reser-voirs had been destroyed at that time and the marine stratum of Palaeozoic to Triassic in the research area did not put out commercial oil and gas flow.
