Chaluhe Basin is in Jilin Province of China with a cumulative sedimentary rock thickness of about 6000 meters and has four subdivisions: Wanchang Structural High, Bo-Tai Sag, Xinanpu Sag, Liangjia Structure High and t...Chaluhe Basin is in Jilin Province of China with a cumulative sedimentary rock thickness of about 6000 meters and has four subdivisions: Wanchang Structural High, Bo-Tai Sag, Xinanpu Sag, Liangjia Structure High and the Gudian Slope. The basin with its better source rock distribution and more favorable maturation indicators than the adjacent Moliqing and Luxiang Basins is expected to be a potential hydrocarbon-producing basin. Four (4) wells were used in determining the maturation hydrocarbon generating potential of the mudstone beds present in the Eocene Formations (Shuangyang, Sheling and Yongji). Obtained result revealed heat flow average of 71.8 mW/m<sup>2</sup>, oil generation between 3.15 mg/g TOC and 39.49 mg/g TOC with gas generation of 6.98 mg/g TOC to 92.83 mg/g TOC. In conclusion the Eocene Shuangyang mudstone is the main petroleum source rock.展开更多
Yitong graben belongs to the north segment of the Tanlu fault belt .It was infilled with Eogene, Neogene and Quaternary clastic deposits, each Of them represents a distinct tectonic sequence.Six types of systems ass...Yitong graben belongs to the north segment of the Tanlu fault belt .It was infilled with Eogene, Neogene and Quaternary clastic deposits, each Of them represents a distinct tectonic sequence.Six types of systems association characteristics of distinct depositional systems and spatial disposition are identified in different evolutionary period of the graben.Sequence Stratigraphic framework of the graben is mainly controlled by structural framework,tectonic movement, sources supply, expanding and contracting cycle of lake, position of depositional center. The key factors are structural framework and tectonic movemeat.Through systematic analysis Of regional tectonic settings, it is recognized that Eogene tectonic sequence of Yitong graben was formed under tenso-shear regime. It includes four sequences indicating four tectonic events attributed to tectonic movement of marginal faults.Neogene tectonic sequence was formed under compresso-shear regime, which includes coarse clastic deposits with a thicknessof 0-500m.Pattern of in the Yitong graben indicates the asymmetrical subsisence of marginal faults along two sides and the complicated structural framework.展开更多
Eyl has the unique desultory-weak or gap seismic reflection structure as its one of the most important characteristics. It is very important to clarify sedimentary characteristics and its origin for Yitong Graben and ...Eyl has the unique desultory-weak or gap seismic reflection structure as its one of the most important characteristics. It is very important to clarify sedimentary characteristics and its origin for Yitong Graben and its sedimentary facies and tectonic evolution. On the basis of the research of core analyses, well logging data analyses, sedimentary facies analyses and seismic reflection structure analyses, the authors have concluded the sedimentary characteristics of Eyl, and have carried out Eyl sedimentary environments and its origin. The result shows that Eyl desultory-weak or gap seismic reflection may be a series of small scale secondary sediment fans superimposition.展开更多
Yitong Graben in Jilin Province of China, hosts three basins, namely: Chaluhe, Luxiang and Moliqing basins. The Chaluhe basin, as the focal point of this study has five subdivisions, thus, Bo-Tai sag, Wanchang Structu...Yitong Graben in Jilin Province of China, hosts three basins, namely: Chaluhe, Luxiang and Moliqing basins. The Chaluhe basin, as the focal point of this study has five subdivisions, thus, Bo-Tai sag, Wanchang Structural high, Liangjia Structure high Xinanpu sag, and the Gudian slope, with a cumulative sedimentary rock thickness of about 6000 metres. The basin is supposed to be a potential hydrocarbon-producing basin with its better source rock distribution and more favorable maturation indicators than the adjacent Luxiang and Moliqing Basin. Determining whether the mudstone beds present in the Eocene Formations are matured enough to generate hydrocarbons, three (3) wells with Seismic Lines (clh02, clh05 and clh07) were used for the study. It is observed that the entire region from NW to SE in the source rocks is mature to produce oil and gas. At depths of about 2400 m and below show good maturity with vitrinite reflectance values averaging 1.02% Ro. The Eocene Shuangyang mudstone is the main petroleum source rock.展开更多
Moliqing basin is a continental sedimentary basin in the northeast of China, between Changchun and Jilin. The source rocks characterization was done using the data of three wells to define the generative potential, ke...Moliqing basin is a continental sedimentary basin in the northeast of China, between Changchun and Jilin. The source rocks characterization was done using the data of three wells to define the generative potential, kerogen type and thermal maturity. Basin Mod software was used for the models. The three Eocene source rock formations in the basin are Shuangyang, Sheling and Yongji. Shuangyang is the most important due to its quantity and maturity levels of kerogen with very good generative potential (TOC between 2% - 4%) towards the southern region of the basin. According to the Tmax values, all three source rocks reached the mature stage, and the levels increased from early mature for the Yongji formation, to late mature for some locations of the Shuangyang formation. The 1D and 2D modeling reconstructed shows that the heat flow developed in the basin laid between 64 and 78.1 mW/m2 and had maximum heat flow location towards the center of the basin.展开更多
? The formation and evolution of the Tertiary transformextensional basins in Northeast China are controlled by extensional and strikeslidding combinational processes because the giant strikeslip fault system, ...? The formation and evolution of the Tertiary transformextensional basins in Northeast China are controlled by extensional and strikeslidding combinational processes because the giant strikeslip fault system, TanchengLujiang fault, cut through the basement or margin. Two kinds of structural styles have been identified in Northeast China: Yitong and Damintun styles. The former shows a clear asymmetry, in which sediments came mainly from two lateral sides and thick filling sediments were adjacent to the main strikeslip fault. The latter shows symmetry filling, in which sediments came from the long axial ends in addition to from two lateral sides. The tectonic evolution of Tertiary transformextensional basins in Northeast China underwent three stages: Eocene extensional, Oligocene transformextensional and Neogene transpressional stages.展开更多
Recently,the researches on structure controls on sandbodies have provided a new method for predicting petroleum reservoirs.The Yitong（伊通） graben is situated in the northern section of the Tan-Lu（郯-庐） fault sys...Recently,the researches on structure controls on sandbodies have provided a new method for predicting petroleum reservoirs.The Yitong（伊通） graben is situated in the northern section of the Tan-Lu（郯-庐） fault system in eastern China.It was characterized by dual properties of strike-slip and extension in Cenozoic.Two types of intrabasinal structures were identified as oblique fault and trans-verse uplift in the graben.The oblique faults arranged en echelon in plain and locally presented nega-tive rosette structures on seismic profile,so they were closely derived from strike-slip movement of the northwestern boundary faults.Moreover,these oblique faults were divided to five zones.The three transverse uplifts,located corresponding to flattened southeast boundary faults,were mainly originated by displacement-gradient folding due to segmental extensional activities of southeast boundary faults.The large-scale sandbodies of subaqueous fan facies and fan delta facies had developed at the two types of intrabasinal structure zone.Based on analyzing the seismic facies,logging facies and seismic attrib-ute extractions,and on discovering many incised valleys at the oblique fault zones,the two types of in-trabasinal structures were revealed to have conducted drainage entering basin and further dispersing,and to have consequently controlled the development and distribution of sandbodies.展开更多
The Yitong graben is located in the northeastern segment of the Tertiary rift system in East China. The graben is bounded by a steep dipping transform fault on the northwestern side and subparallel normal faults on t...The Yitong graben is located in the northeastern segment of the Tertiary rift system in East China. The graben is bounded by a steep dipping transform fault on the northwestern side and subparallel normal faults on the southeastern side, with very thick marginal fan complexes indicating syntectonic sedimentation. The graben is infilled with Tertiary sediments up to 6 000 m thick, in which a series of different scaled hiatuses and tectonic inversion events have been discerned during hydrocarbon exploration. According to regional and local conformities, the basin infill may be divided into three tectonic sequences, among which the major sequence TS2 is further subdivided into three sequence sets and fourteen subsequences. Based on the sequence stratigraphic framework, depositional system tracts which are characterized by marginal fan complexes on both sides of basin and deep or shallow lacustrine deposits in the central part are reconstructed. The subsidence curves show that the graben had undergone several rapid subsidence episodes, which is interpreted to have been caused by multiple stretching of the lithosphere. Integrative analysis of the depositional structural features shows that the regional tectonic stress system experienced a transformation from dextral transformational shear through thermal subsidence to sinistral compressional shear with a general extensional setting. Extension and wrenching dominated the graben evolution and affected the depositional style in different evolutionary stages, the spatial configuration of depositional system and its relationship with unconformities. The conclusions have been applied with some successes to studying the reservoir and hydrocarbon source rock distribution and lithologic stratigraphic traps in this basin.展开更多
文摘Chaluhe Basin is in Jilin Province of China with a cumulative sedimentary rock thickness of about 6000 meters and has four subdivisions: Wanchang Structural High, Bo-Tai Sag, Xinanpu Sag, Liangjia Structure High and the Gudian Slope. The basin with its better source rock distribution and more favorable maturation indicators than the adjacent Moliqing and Luxiang Basins is expected to be a potential hydrocarbon-producing basin. Four (4) wells were used in determining the maturation hydrocarbon generating potential of the mudstone beds present in the Eocene Formations (Shuangyang, Sheling and Yongji). Obtained result revealed heat flow average of 71.8 mW/m<sup>2</sup>, oil generation between 3.15 mg/g TOC and 39.49 mg/g TOC with gas generation of 6.98 mg/g TOC to 92.83 mg/g TOC. In conclusion the Eocene Shuangyang mudstone is the main petroleum source rock.
文摘Yitong graben belongs to the north segment of the Tanlu fault belt .It was infilled with Eogene, Neogene and Quaternary clastic deposits, each Of them represents a distinct tectonic sequence.Six types of systems association characteristics of distinct depositional systems and spatial disposition are identified in different evolutionary period of the graben.Sequence Stratigraphic framework of the graben is mainly controlled by structural framework,tectonic movement, sources supply, expanding and contracting cycle of lake, position of depositional center. The key factors are structural framework and tectonic movemeat.Through systematic analysis Of regional tectonic settings, it is recognized that Eogene tectonic sequence of Yitong graben was formed under tenso-shear regime. It includes four sequences indicating four tectonic events attributed to tectonic movement of marginal faults.Neogene tectonic sequence was formed under compresso-shear regime, which includes coarse clastic deposits with a thicknessof 0-500m.Pattern of in the Yitong graben indicates the asymmetrical subsisence of marginal faults along two sides and the complicated structural framework.
文摘Eyl has the unique desultory-weak or gap seismic reflection structure as its one of the most important characteristics. It is very important to clarify sedimentary characteristics and its origin for Yitong Graben and its sedimentary facies and tectonic evolution. On the basis of the research of core analyses, well logging data analyses, sedimentary facies analyses and seismic reflection structure analyses, the authors have concluded the sedimentary characteristics of Eyl, and have carried out Eyl sedimentary environments and its origin. The result shows that Eyl desultory-weak or gap seismic reflection may be a series of small scale secondary sediment fans superimposition.
文摘Yitong Graben in Jilin Province of China, hosts three basins, namely: Chaluhe, Luxiang and Moliqing basins. The Chaluhe basin, as the focal point of this study has five subdivisions, thus, Bo-Tai sag, Wanchang Structural high, Liangjia Structure high Xinanpu sag, and the Gudian slope, with a cumulative sedimentary rock thickness of about 6000 metres. The basin is supposed to be a potential hydrocarbon-producing basin with its better source rock distribution and more favorable maturation indicators than the adjacent Luxiang and Moliqing Basin. Determining whether the mudstone beds present in the Eocene Formations are matured enough to generate hydrocarbons, three (3) wells with Seismic Lines (clh02, clh05 and clh07) were used for the study. It is observed that the entire region from NW to SE in the source rocks is mature to produce oil and gas. At depths of about 2400 m and below show good maturity with vitrinite reflectance values averaging 1.02% Ro. The Eocene Shuangyang mudstone is the main petroleum source rock.
文摘Moliqing basin is a continental sedimentary basin in the northeast of China, between Changchun and Jilin. The source rocks characterization was done using the data of three wells to define the generative potential, kerogen type and thermal maturity. Basin Mod software was used for the models. The three Eocene source rock formations in the basin are Shuangyang, Sheling and Yongji. Shuangyang is the most important due to its quantity and maturity levels of kerogen with very good generative potential (TOC between 2% - 4%) towards the southern region of the basin. According to the Tmax values, all three source rocks reached the mature stage, and the levels increased from early mature for the Yongji formation, to late mature for some locations of the Shuangyang formation. The 1D and 2D modeling reconstructed shows that the heat flow developed in the basin laid between 64 and 78.1 mW/m2 and had maximum heat flow location towards the center of the basin.
文摘? The formation and evolution of the Tertiary transformextensional basins in Northeast China are controlled by extensional and strikeslidding combinational processes because the giant strikeslip fault system, TanchengLujiang fault, cut through the basement or margin. Two kinds of structural styles have been identified in Northeast China: Yitong and Damintun styles. The former shows a clear asymmetry, in which sediments came mainly from two lateral sides and thick filling sediments were adjacent to the main strikeslip fault. The latter shows symmetry filling, in which sediments came from the long axial ends in addition to from two lateral sides. The tectonic evolution of Tertiary transformextensional basins in Northeast China underwent three stages: Eocene extensional, Oligocene transformextensional and Neogene transpressional stages.
基金supported by the National Natural Science Foundation of China(No.40872077)
文摘Recently,the researches on structure controls on sandbodies have provided a new method for predicting petroleum reservoirs.The Yitong（伊通） graben is situated in the northern section of the Tan-Lu（郯-庐） fault system in eastern China.It was characterized by dual properties of strike-slip and extension in Cenozoic.Two types of intrabasinal structures were identified as oblique fault and trans-verse uplift in the graben.The oblique faults arranged en echelon in plain and locally presented nega-tive rosette structures on seismic profile,so they were closely derived from strike-slip movement of the northwestern boundary faults.Moreover,these oblique faults were divided to five zones.The three transverse uplifts,located corresponding to flattened southeast boundary faults,were mainly originated by displacement-gradient folding due to segmental extensional activities of southeast boundary faults.The large-scale sandbodies of subaqueous fan facies and fan delta facies had developed at the two types of intrabasinal structure zone.Based on analyzing the seismic facies,logging facies and seismic attrib-ute extractions,and on discovering many incised valleys at the oblique fault zones,the two types of in-trabasinal structures were revealed to have conducted drainage entering basin and further dispersing,and to have consequently controlled the development and distribution of sandbodies.
文摘The Yitong graben is located in the northeastern segment of the Tertiary rift system in East China. The graben is bounded by a steep dipping transform fault on the northwestern side and subparallel normal faults on the southeastern side, with very thick marginal fan complexes indicating syntectonic sedimentation. The graben is infilled with Tertiary sediments up to 6 000 m thick, in which a series of different scaled hiatuses and tectonic inversion events have been discerned during hydrocarbon exploration. According to regional and local conformities, the basin infill may be divided into three tectonic sequences, among which the major sequence TS2 is further subdivided into three sequence sets and fourteen subsequences. Based on the sequence stratigraphic framework, depositional system tracts which are characterized by marginal fan complexes on both sides of basin and deep or shallow lacustrine deposits in the central part are reconstructed. The subsidence curves show that the graben had undergone several rapid subsidence episodes, which is interpreted to have been caused by multiple stretching of the lithosphere. Integrative analysis of the depositional structural features shows that the regional tectonic stress system experienced a transformation from dextral transformational shear through thermal subsidence to sinistral compressional shear with a general extensional setting. Extension and wrenching dominated the graben evolution and affected the depositional style in different evolutionary stages, the spatial configuration of depositional system and its relationship with unconformities. The conclusions have been applied with some successes to studying the reservoir and hydrocarbon source rock distribution and lithologic stratigraphic traps in this basin.
