Craton basins are the main sites where marine carbonate oil and gas reservoirs develop in China.However,the previous studies scarcely focused on the controlling effects of tectonic differentiation on the formation of ...Craton basins are the main sites where marine carbonate oil and gas reservoirs develop in China.However,the previous studies scarcely focused on the controlling effects of tectonic differentiation on the formation of large oil and gas fields in the ancient craton basins.In such circumstances,it is difficult to evaluate and select the favorable zones for exploring carbonate oil and gas.In this paper,based on the research results of the SinianeTriassic prototype basin and lithofacies paleogeography of the Sichuan Basin,the tectonic differentiation pattern of craton basins and its controls on the accumulation elements and the distribution of hydrocarbons were analyzed with reference to the concept that structures control the sedimentation and distribution of oil and gas.The study reveals the results in three aspects.First,the intra-cratonic graben controls the high-quality source rocks and the hydrocarbon generation center,which forms good source-reservoir assemblage with the highquality reservoir in the platform margin at the flank,showing excellent near-source accumulation conditions.Second,the three types of paleo-uplifts(i.e.differential denudation,syn-sedimentary,and folding)and the deep-large faults developed in the craton are favorable for the formation and distribution of large-scale carbonate reservoirs.Third,the superimposed areas with tectonic differentiation in multiple periods and multiple types are favorable for forming large oil and gas fields.It is concluded that the marine carbonate rocks show a huge oil and gas exploration potential in the Sichuan Basin.Attention should be paid to the new exploration targets of natural gas,such as the Sinian Dengying Fm.in the platform margin at the east flank of DeyangeAnyue graben,the Lower Cambrian Longwangmiao Fm.on the slope of paleo-uplift in central Sichuan Basin,and the Middle Permian Maokou Fm.in centralewest Sichuan Basin,where oil and gas accumulation conditions are favorable.展开更多
This article aims to analyze the main controlling factors of development, distribution and evolution of the fault systems in the Tarim Basin. Based on the seismic profile interpretation, compre- hensive analysis of th...This article aims to analyze the main controlling factors of development, distribution and evolution of the fault systems in the Tarim Basin. Based on the seismic profile interpretation, compre- hensive analysis of the drilling and geologic data, six fault systems maybe recognized in the Tarim Basin, they are the foreland fault system of the South Tianshan Mountain, the northern Tarim uplift fault sys- tem, North Tarim depression fault system, central fault system, Southwest Tarim fault system, and Southeast Tarim fault system. It is indicated that the main differences exist at the development, evolu- tion and distribution of the fault systems in the Tarim Basin. The sub-fault systems can be recognized according to the differences of the fault development and distribution in the interior of the fault system. It is characterized that the multi-level differential development and distribution of the fault systems ex- ist in the Tarim Basin. The fault belt developed in the Paleozoic strata mainly distribute at the pa- leo-uplift and paleo-slope in the interior of the Tarim Basin, and the fault belt occurred in the Meso-Cenozoic beds mainly develop at the peripheral foreland depressions. Zonal and segment differ- ential development and distribution of the fault systems also exist in the Tarim Basin. The formation and distribution of the Tarim fault systems is of complex controlling mechanisms. Poly-phase structural movement and tectonic transition controls the multi-phase differential development and distribution of the fault systems in the Tarim Basin. Multi-level differential development and distribution is controlled by multi-level detachment belt and regional unconformities. Zonal and segment differential develop- ment and distribution of the Tarim fault systems maybe controlled by pre-existed basement structural texture. The major direction of the fault systems in the Tarim Basin is controlled by the later stage basin-mountain coupling.展开更多
文摘Craton basins are the main sites where marine carbonate oil and gas reservoirs develop in China.However,the previous studies scarcely focused on the controlling effects of tectonic differentiation on the formation of large oil and gas fields in the ancient craton basins.In such circumstances,it is difficult to evaluate and select the favorable zones for exploring carbonate oil and gas.In this paper,based on the research results of the SinianeTriassic prototype basin and lithofacies paleogeography of the Sichuan Basin,the tectonic differentiation pattern of craton basins and its controls on the accumulation elements and the distribution of hydrocarbons were analyzed with reference to the concept that structures control the sedimentation and distribution of oil and gas.The study reveals the results in three aspects.First,the intra-cratonic graben controls the high-quality source rocks and the hydrocarbon generation center,which forms good source-reservoir assemblage with the highquality reservoir in the platform margin at the flank,showing excellent near-source accumulation conditions.Second,the three types of paleo-uplifts(i.e.differential denudation,syn-sedimentary,and folding)and the deep-large faults developed in the craton are favorable for the formation and distribution of large-scale carbonate reservoirs.Third,the superimposed areas with tectonic differentiation in multiple periods and multiple types are favorable for forming large oil and gas fields.It is concluded that the marine carbonate rocks show a huge oil and gas exploration potential in the Sichuan Basin.Attention should be paid to the new exploration targets of natural gas,such as the Sinian Dengying Fm.in the platform margin at the east flank of DeyangeAnyue graben,the Lower Cambrian Longwangmiao Fm.on the slope of paleo-uplift in central Sichuan Basin,and the Middle Permian Maokou Fm.in centralewest Sichuan Basin,where oil and gas accumulation conditions are favorable.
基金sponsored by the National Natural Science Foundation of China(Nos.41172125,40972090)the National Basic Research Program of China(Nos.2012CB214804,2005CB422107)+2 种基金the Investigation and Evaluation on Strategic Region of National Oil and Gas Resource(No.2009GYXQ02-05)the Doctoral Fund of Ministry of Education of China(No.200804250001)the National Key Scientific Project of China(No.2011ZX05002-003-001HZ)
文摘This article aims to analyze the main controlling factors of development, distribution and evolution of the fault systems in the Tarim Basin. Based on the seismic profile interpretation, compre- hensive analysis of the drilling and geologic data, six fault systems maybe recognized in the Tarim Basin, they are the foreland fault system of the South Tianshan Mountain, the northern Tarim uplift fault sys- tem, North Tarim depression fault system, central fault system, Southwest Tarim fault system, and Southeast Tarim fault system. It is indicated that the main differences exist at the development, evolu- tion and distribution of the fault systems in the Tarim Basin. The sub-fault systems can be recognized according to the differences of the fault development and distribution in the interior of the fault system. It is characterized that the multi-level differential development and distribution of the fault systems ex- ist in the Tarim Basin. The fault belt developed in the Paleozoic strata mainly distribute at the pa- leo-uplift and paleo-slope in the interior of the Tarim Basin, and the fault belt occurred in the Meso-Cenozoic beds mainly develop at the peripheral foreland depressions. Zonal and segment differ- ential development and distribution of the fault systems also exist in the Tarim Basin. The formation and distribution of the Tarim fault systems is of complex controlling mechanisms. Poly-phase structural movement and tectonic transition controls the multi-phase differential development and distribution of the fault systems in the Tarim Basin. Multi-level differential development and distribution is controlled by multi-level detachment belt and regional unconformities. Zonal and segment differential develop- ment and distribution of the Tarim fault systems maybe controlled by pre-existed basement structural texture. The major direction of the fault systems in the Tarim Basin is controlled by the later stage basin-mountain coupling.
