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GEOCHEMISTRY AND TECTONIC ENVIRONMENT AND RESERVOIR FORMATION OF MANTLE-DERIVED NATURAL GAS IN THE songliao BASIN, NORTHEASTERN CHINA

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Geotectonica et Metallogenia 2004年第2期28卷 168-182页

作者： LI Zian GUO Zhanqian BAI Zhenguo LIN Ge Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhouGD 510640China Exploration & Development Research Institute of Daqing Oilfield Daqing LN 163712China Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou GD 510640 China Graduate School of the Chinese Academy of Sciences Beiying 100039China Key Laboratory of Marginal Sea Geology Guangzhou Institute of Geochemistry Chinese Academy of SciencesGuangzhouGD 510640China

During several decades of exploration, a number of mantle-derived natural gas pools have been discovered in the vicinities of deep faults in the songliao Basin, northeastern China. The natural gas in these pools has a δ13C1 value of ?16.50/00 to ?24.20/00, a reversed arrangement in the amount of carbon isotopes in methane and its endogamous products (namely, δ13C1 >δ13C2 >δ13C3 >δ13C4), a 3He/4He value of 1.97 to 2.34×10-6,and an Ar/36Ar value of 1063 to 1949. This indicates a mantle 40 source for the natural gas. The trace elements Cd, In, Te and Re, never found in organic-sourced hydrocarbons, are highly enriched in certain crude oils from the Basin; respectively, concentrations of these elements were found to be 751, 28, 16 and 323 times the average crustal values in China, and this also supports a mantle-derived natural gas origin. The characteristics of mantled-derived magmatic rocks, hydrothermal fluids and gaseous fractions distributed in and near the deep songliao Basin faults indicate that rifting tectonics is providing the mechanisms for this outgassing of the mantle. Deep extensional (normal) faults provide pathways for upward movement of these materials, and in the songliao Basin, these deep rift fault zones are associated with reservoir occurrence and cap rock seals, forming good sites for accumulation of mantle-derived natural gas. Furthermore, a layer of low velocity, low density and high conductivity in the deep crust has been identified as a potential reservoir for mantle-derived natural gas.

关键词： mantle-derived natural gas geochemistry rift fault reservoir formation songliao Basin

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Late stage thermal history of the songliao Basin and its tectonic implications: Evidence from apatite fission track (AFT) analyses

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Science China Earth Sciences 2007年第10期50卷 1479-1487页

作者： XIANG CaiFu1,2?, FENG ZhiQiang3, PANG XiongQi1,2, WU HeYong3 & LI JunHong1,2 1 Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249, China 2 Key Laboratory for Hydrocarbon Accumulation in China University of Petroleum, Ministry of Education, Beijing 102249, China 3 Prospecting and Exploration Institute of Daqing Oil Field, Daqing 163458, China Basin and Reservoir Research Center China University of Petroleum Beijing 102249 China Key Laboratory for Hydrocarbon Accumulation in China University of Petroleum Ministry of Education Beijing 102249 China Prospecting and Exploration Institute of Daqing Oil Field Daqing 163458 China

Apatite Fission Track (AFT) data from the songliao Basin indicates that the late stage tectonic movements in the songliao Basin have zoning in space and episodes in time. The late stage tectonic movements started from the east part of the basin and migrated westward. AFT ages in the east part of the basin are older than those in the west part of the basin, suggesting that the uplift occurred earlier in the east than in the west. The denudation thickness in the east part of the basin is significantly greater than that in the centre and west. The thermal history evolved two episodes of rapid cooling and subsequent slow cooling processes. Age-depth relationship derived from the AFT data indicates a four-episode denudation history. Further Monte Carlo random simulation of the AFT data reveals the four changing points of the thermal evolution at 65 Ma, 43.5 Ma, 28 Ma and 15 Ma, respectively. The uplifting and denudation rates from different episodes of evolution are proportional to the plate convergence rate. Based on the above analyses and the regional geologic background, it is concluded that the late stage thermal events in the songliao Basin are the far field response to the subduction of the Pacific Plate under the Eurasian Plate. The first episode of the rapid cooling probably started at the end of the Nenjiang Formation, climaxed at the end of the Cretaceous and ceased at the Late Eocene. The subsequent slow cooling lasts another 15 Ma. The first episode of the evolution is the far field response to the major episode of the Yanshan Movement and subsequent series of the tectonic reorganization, especially the directional change of the Pacific Movement and also the subduction of the Indian Plate underneath the Eurasian Plate. While the second episode of the evolution is the far field response to the extension and closure of the Sea of Japan. Extension led to the migration and converging of the mantle heat flow to the Sea of Japan and resulted in the rapid cooling of the songliao Basin.

关键词： apatite fission track, late stage tectonic movement, episodic movement, plate tectonics, songliao Basin

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LA-ICP-MS zircon U-Pb dating from granitoids in southern basement of songliao basin:Constraints on ages of the basin basement

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Science China Earth Sciences 2007年第7期50卷 995-1004页

作者： GAO FuHong XU WenLiang YANG DeBin PEI FuPing LIU XiaoMing HU ZhaoChu College of Earth Sciences Jilin UniversityChangchun 130061China The Key Laboratory of Continental Dynamics Northwest UniversityXi’an 710069China

Seven LA-ICP-MS zircon U-Pb datings from granitoids in the southern basement of the songliao basin were done in order to constrain the ages of the basin basement. The cathodoluminescence (CL) images of the zircons from seven granitoids indicate that they are euhedral-subhedral ones with striped ab-sorption and obvious oscillatory zoning rims. The dating results show that a weighted mean 206Pb/238U age is 236±3 Ma for quartz diorite (sample No.T6-1) located in the western slope of the basin,that weighted mean 206Pb/238U ages are 319±1 Ma (2126 m) and 361±2 Ma (1994 m) for diorite (sample No.YC1-1) and granite (sample No.YC1-2) located in northern part of southeastern uplift of the basin,respectively,and that weighted mean 206Pb/238U ages are 161±5 Ma,165±2 Ma,165±1 Ma and 161±4 Ma for samples Q2-1,SN121,SN122,and SN72 granitoids located in southern part of southeastern uplift of the basin,respectively. The statistical results of ages suggest that the middle Jurassic granitoids con-stitute the main part of basement granitoids,and that the Hercynian and Indo-Sino magmatisms also occur in the basin basement. It is implied that the songliao basin should be a rift one formed in the intracontinent or active continental margin settings in the late Mesozoic after the Middle Jurassic orogeny took place.

关键词： songliao basin basement granitoid zircon LA-ICP-MS U-Pb dating

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Geologic Features of Wangjiatun Deep Gas Reservoirs of Volcanic Rock in songliao Basin

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Global Geology 2001年第2期6卷 120-128页

作者： SHAN Xuanlong (College of Earth Science, Jilin University, Changchun, 130061, P.R.China) CHEN Shumin (Daqing Petroleum Bureau Prospecting and Exploration Institute, Daqing, 163712, P.R.China) WU Dawei and Zang Yudong (Qianan Oil Product Factory of Ji College of Earth Science Jilin University Changchun 130061 P.R. China Daqing Petroleum Bureau Prospecting and Exploration Institute Daqing 163712 P. R China Qianan Oil Product Factory of Jilin Oil Field Songyuan 138001 P.R. China

Wangjiatun gas pool is located at the north part of Xujiaweizi in songliao basin. Commercial gas flow has been found in the intermediate and acid volcanic rock of upper Jurassic-lower Cretaceous, which makes a breakthrough in deep nature gas prospecting in songliao basin. The deep natural gas entrapment regularity is discussed in the paper by the study of deep strata, structure and reservoir. Andesite, rhyolite and little pyroclastic rock are the main reservoirs. There are two types of volcanic reservoir space assemblage in this area: the pore and fissure and the pure fissure. Changes had taken place for volcanic reservoir space during long geologic time, which was controlled by tectonic movement and geologic environment. The developed degree of reservoir space was controlled by tectonic movement, weathering and filtering, corrosion and Filling. There are three types of source-reservoir-caprock assemblage in this area: lower source- upper reservoir model, upper source-lower reservoir model and lateral change model. Mudstone in Dengluoku formation and the compacted volcanic rock of upper Jurassic-lower Cretaceous are the caprock for deep gas reservoirs. Dark mudstone of deep lacustrine facies in Shahezi formation and lower part of Dengluoku formation are the source rock of deep gas. It can be concluded that deep gas pools are mainly volcanic lithologic reservoirs.

关键词： Wangjiatun deep gas reservoirs, Volcanic rock, Upper Jurassic - lower Cretaceous, songliao basin

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Selective chemical degradation of kerogen from Nenjiang Formation of the southern songliao Basin

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Science China Earth Sciences 2007年第10期50卷 1504-1509页

作者： XIONG YongQiang WANG YongQuan WANG YanMei State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640China State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640China State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640China

A sequential selective chemical degradation has been performed on the kerogen from the Nenjiang Formation of the southern songliao Basin by using a series of mild chemical degradations (alkaline hydrolysis, cleavage of ether-bonds and sulfur-bonds, and ruthenium tetroxide (RuO4) oxidation). Subsequently, the GC-MS analyses are carried out on different degradation products. The results show that chemical degradations can release a great number of GC/MS-determinable biomarkers from insoluble kerogen, such as, alkaline hydrolysis products mainly comprise n-alkanes, fatty acids and alkanols; thiophene compounds are predominantly ether-bound to kerogen matrix; the products from the cleavage of sulfur-sulfur and sulfur-carbon bonds in the kerogen include fatty acids, alkanols and some n-alkanes with high carbon numbers; RuO4 oxidation products are predominantly monocarboxylic acids and α,ω-dicarboxylic acids. The distributions of main degradation products indicate that organic matter in this kerogen is predominantly derived from algae and bacteria, and that small amounts of high plant-derived organic matter are possibly combined into kerogen matrix at the late stage by sulfur bonds and other means. This study will provide an important approach for further discussing sources of organic matter in source rocks and their depositional paleoenvironments.

关键词： kerogen, selective chemical degradation, biomarker, songliao basin

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THE RELATIONS BETWEEN DEEP DYNAMIC PROCESS AND THE FORMATION OF OIL-GAS POOLS IN THE songliao BASIN,CHINA

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Geotectonica et Metallogenia 1996年第Z1期20卷 70-76页

作者： Li Zhi’an(Changsha Institute of Geotectonics, Academia Sinica, Changsha, 410013, Hunan, China)

THE RELATIONS BETWEEN DEEPDYNAMIC PROCESS AND THEFORMATION OF OIL-GAS POOLS INTHE songliao BASIN, CHINALi Zhi’an(Changsha Institute of Geotectonics, Academia Sinica, Changsha, 410013, Hunan, China)songliao basin, crust structure, deep dynamics, the formation of oil-gas poolsThis essay deals in detail with the inhomogeneity of the crust structure and the variation of the Moho, the process of deep dynamics and also relations of deep dynamic process to the formation of oil-gas pools in songliao Basin.

关键词： songliao basin crust structure deep dynamics the formation of oil-gas pools

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DYNAMICS OF TECTONIC EVOLUTION OF THE songliao BASIN, CHINA

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Geotectonica et Metallogenia 1996年第Z2期20卷 191-196页

作者： LI Zhi’an’ SHAN Yehua WU Jingxin ( Changsha Institute of Geotectonics, Academia Sinica, Changsha, 410013, China)( Occupational College, Daqing Petroleum Administration, 163003, China)

The paper describes regional geology of the songliao basin. and discusses its hypogene action. voleanic activity and characteristics of tectonics in different evolution stages. On this basis, the paper further discuss... 详细信息

关键词： tectonic evolution dynamics the songliao basin

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Late Turonian Microfossils and Paleoclimate in the songliao Basin, NE China

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Open Journal of Geology 2019年第10期9卷 605-608页

作者： Ying Cui Dangpeng Xi Zuohuan Qin Xiaoqiao Wan Normal College Shenyang University Shenyang China State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Beijing China

Although the paleoclimate of the marine Cretaceous has been well studied, the paleoclimate of the non-marine is still not well understood. The songliao Basin was one of the largest non-marine rift basins during Cretaceous. The Well-preserved Cretaceous lacustrine deposits in this basin provide a unique opportunity to study terrestrial paleoenvironments and paleoclimate during the Late Cretaceous. Here, the microfossils from the Late Turonian Qingshankou Formation of the songliao Basin were used to investigate the paleoenvironments and paleoclimate of east Asia. There are two spore and pollen assemblages recognized: a Cedripites-Cyathidites-Classopollis assemblage from Upper Member 1, and a Cedripites-Cyathidites-Classopollis assemblage from Lower Member 2 of the Qingshankou Formation, respectively. Besides, relatively abundant ostracods have been identified. In the songliao Basin, the climate was relatively warm and wet during Late Turonian, with good source rock deposited in the songliao lake.

关键词： Cretaceous songliao Basin Spore and Pollen Paleoclimate

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Reservoir Volcanic Rocks: Geology and Geochemistry, the Mesozoic Non-marine songliao Basin, NE China

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Global Geology 2003年第2期8卷 129-137页

作者： Frank Mattern College of Geology Berlin Free University Berlin D-12249 Germany

The reservoir volcanic rocks in songliao Basin include the Lower Cretaceous (K1yc Form.,114～135 Ma, acidic rocks) and the Upper Jurassic (J3hs Form., 145～158 Ma, intermediate rocks). Vesicles coupled with faults make the volcanic reservoir spaces which do not as badly getting worse with buried depth as those of sediments generally doing. The flood rhyolites of the Lower Cretaceous cover ca. 100 000 km2 with relict thickness from 100 m to more than 1 000 m. They are high-silica, rich in aluminum and potassium, high REE contents with large negative Eu anomalies, thus believed also be formed by the large-scale sialic crust partial-melting. The andesitic rocks of the Upper Jurassic are rich in Al and K, but with lower REE contents and minor negative Eu anomalies, as well as dispersal patterns of HREE. They are believed to be produced by progressively shallower partial-melting where the fractionation of garnet and/or zircon may be involved. The most probable heat sources provided for the long-lasting volcanisms in the songliao Basin is the subduction of the Okhotsk plate.

关键词： reservoir volcanic rocks, Mesozoic, non-marine, songliao Basin

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Calculated Porosity of Volcanic Reservoir in Wangjiatun of the Northern songliao Basin, NE China

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Global Geology 2003年第2期8卷 138-140页

作者： Xuanlong Shan1, Chuanbiao Wan2, Rihui Cheng1, Wanzhu Liu11. College of Earth Sciences, Jilin University, Changchun, 130026 China 2. Daqing Exploration & Development Institute, Daqing, 163712 China College of Earth Sciences Jilin University Changchun 130026 China Daqing Exploration & Development Institute Daqing 163712 China

In Wangjiatun area of the Northern songliao Basin, reservoir space can be divided into three types: primary pore, secondary pore and fissure according to their origins,which can be subdivided into eight subtypes: macro-vesicule, shrank primary vesicule, alteration pore, groundmass corrosive pore, normal structural crack, corrosive structural crack, filled structural crack and groundmass shrank crack according to texture and origin of the pore space. It has characteristic of double pore medium. Volcanic porosities of small diameter samples (with diameter of ca. 2.5 cm) and large diameter samples (with diameter of ca. 21.5 cm) were tested in accordance with the characteristic of volcanic reservoir space. Volcanic porosities for small diameter samples correspond with matrix porosities and those of large diameter samples correspond with total porosities including matrix and fractured porosities. Models of the calculated porosity by acoustic wave or density of volcanic reservoir are established in view of those measured data. Comparison of calculated and measuredporosities shows that precision of calculated porosities is lower for rhyolite and tuffites, and higher for basaltand andesite. Relative errors of calculated porosities by model of large diameter samples are lower than those of small diameter samples, i. e. precision of the former is higher than that of the later.

关键词： songliao Basin, volcanic reservoir, reservoir space, calculating models of porosity

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