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Tectono–sedimentary Evolution of the Late Triassic Xujiahe Formation in the Sichuan Basin

Acta Geologica Sinica(English Edition) 2013年第6期87卷 1554-1568页

作者： LUO Liang JIA Dong QI Jiafu wei guoqi DENG Fei State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum College of Geosciences China University of Petroleum School of Earth Sciences And Engineering Nanjing University Research Institute of Petroleum Exploration and Development PetroChina Company Limited Foshan Geological Survey

The early stage of Sichuan Basin formation was controlled by the convergence of three major Chinese continental blocks during the Indosinian orogeny that include South China,North China,and Qiangtang *** the Late Triassic Xujiahe Formation is assumed to represent the commencement of continental deposition in the Sichuan Basin,little research is available on the details of this particular *** stratigraphic analysis reveals that the Xujiahe Formation comprises four third-order depositional ***,two tectono-sedimentary evolution stages,deposition and denudation,have been *** wedge-shaped geometry revealed in a cross section of the southern Sichuan Basin normal to the Longmen Shan fold-thrust belt is displayed for the entire Xujiahe *** depositional extent did not cover the Luzhou paleohigh during the LST1 to LST2 （LST,TST and HST mean Iowstand,transgressive and highstand systems tracts,1,2,3 and 4 represent depositional sequence 1,2,3 and 4）,deltaic and fluvial systems fed sediments from the Longmen Shan belt,Luzhou paleohigh,Hannan dome,and Daba Shan paleohigh into a foreland basin with a centrally located *** forebulge of the western Sichuan foreland basin was located southeast of the Luzhou paleohigh after *** to the principle of nonmarine sequence stratigraphy and the lithology of the Xujiahe Formation,four thrusting events in the Longmen Shan fold-thrust belt were distinguished,corresponding to the basal boundaries of sequences 1,2,3,and *** northern Sichuan Basin was tilted after the deposition of sequence 3,inducing intensive erosion of sequences 3 and 4,and formation of wedge-shaped deposition geometry in sequence 4 from south to *** tilting probably resulted from small-scale subduction and exhumation of the western South China block during the South and North China block collision.

关键词： Xujiahe Formation tectono-sedimentary denudation Longmen Shan Sichuan Basin

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Silurian to Devonian foreland basin in the south edge of Tarim Basin

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Chinese Science Bulletin 2002年第S1期47卷 42-46页

作者： wei guoqi JIA Chengzao LI Benliang CHEN Hanlin Langfang Branch Research Institute of Exploration and Development PetroChina Langfang 065007China PetroChina Company Limited Beijing 100011China Earth Science Department Zhejiang UniversityHangzhou 310013 China

Based on the theory of plate tectonics, combin-ing with the isotopic dating of ophiolite, igneous and volcan-ics, geochemical test, rare earth element analyze and seismicinterpretation, this paper studies the pre-Carboniferous tec-tonics and sedimentary formation of the south edge of theTarim Basin and proves that there exists the Kunlun Oceanunder tensional tectonics during the Sinian and Cambrian inthe south edge of the Tarim Plate. After that, due to the colli-sion orogenesis, there formed the peripheral foreland basinin the south edge of Tarim. The Upper Silurian and Devo-nian molasses sedimentary system superposed on the Sinianand Middle Silurian passive margin flysch sedimentary sys-tem and formed the bivariate structure of the foreland *** at the same time, based on the field geology and seismicinterpretation, we have identified that the formation of theSilurian and Devonian have the character of half depositwhich shows thick in the south area and thin in the north,and the pre-Carboniferous thrust compression tectonics re-mained in the foreland thrust belt, which further demon-strates that there existed the Silurian and Devonian periph-eral foreland basin on the south edge of the Tarim Basin.

关键词： Tarim Basin ophiolite igneous volcanics peripheral foreland basin foreland thrust belt.

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Meso-Cenozoic Tectonic Events Recorded by Apatite Fission Track in the Northern Longmen-Micang Mountains Region

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Acta Geologica Sinica(English Edition) 2012年第1期86卷 153-165页

作者： LEI Yongliang JIA Chengzao LI Benliang wei guoqi CHEN Zhuxin SHI Xin State Key Laboratory of Enhanced Oil Recovery Beijing 100083China Research Institute of Petroleum Exploration and Development(RIPED) PetroChinaBeijing 100083China PetroChina Company Limited Beijing 100010China Research Institute of Petroleum Exploration and Development-Langfang Langfang 065007China

There is a cross-cutting relationship between the E-W trending structures and the NE- trending structures in the northern Longmen-Micang Mountains region, which reflects possible regional tectonic transition and migration. Apatite fission track （AFT） analyses of 15 samples collected from this area yield apparent ages varying from 30.3±4.2 Ma to 111.7±9.0 Ma and confined-track-lengths ranging from 10.6±0.3 pm to 12.4±0.1 μm. Four specific groups were identified on the basis of the Track Age Spectrum Calculation （TASC） patterns, i.e., 143-112 Ma, 93.6-88 Ma, 42-40 Ma and -25.6 Ma. These age groups correspond to the spatial distributions of datasets and may represent four tectonic events. Together with the regional deformation patterns, the four age groups are interpreted to indicate tectonic superposition, transition and migration during the Meso-Cenozoic with the following possible order：（1） the Micang Mountains belt was dominated by the E-W trending structure during 143-112 Ma; （2） the contraction of the Longmen Mountains belt from the NW to the SE during 93.6-88 Ma led to the superposition of the NE-trending structures over the E-W trendinding structures; （3） dextral strike-slip shear dominated the Longmen Mountains belt at 42-40 Ma; （4） westward migration of the active tectonic belt occurred from 93.6-25.6 Ma in a break-back sequence in the northern Longmen Mountains belt. The Late Cenozoic tectonics in the northern Longmen Mountains belt are characterized by the dextral strike-slip shear and the occurrence of westward break-back sequence of deformations. As a result, north-south differences in deformations along the Longmen Mountains belt were intensified since the Miocene time and strains were mainly accumulated in the hinterland of the Longmen Mountains instead of being propagated to the foreland basin.

关键词： apatite fission track tectonic events Longmen Mountains Micang Mountains Meso-Cenozoic

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Characteristics and accumulation mode of large-scale Sinian-Cambrian gas reservoirs in the Gaoshiti-Moxi region, Sichuan Basin

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Petroleum Research 2016年第2期1卷 164-177页

作者： guoqi wei Jinhu Du Chunchun Xu Caineng Zou wei Yang Ping Shen Zengye Xie Jian Zhang Langfang Branch PetroChina Research Institute of Exploration and DevelopmentCNPC Key Laboratory of Gas Reservoir Formation and DevelopmentLangfang 065007China PetroChina Exploration&Production Company Beijing 100007China PetroChina Southwest Oil and Gas Field Company Chengdu 610051China PetroChina Research Institute of Petroleum Exploration and Development Beijing 100083China

The Sinian-Cambrian formations of the Sichuan Basin have favorable hydrocarbon accumulation conditions,but the exploration for large-scale gas fields is quite challenging due to old strata and multiple tectonic *** the weiyuan Sinian large gas field was found in 1964,the largest monoblock gas field(Anyue Gasfield)was discovered in the Cambrian Longwangmiao Formation of the Moxi region in 2013 with proven gas reserves of 440.1×109 *** proven,probable and possible reserves exceed one trillion cubic meters in the Sinian Dengying Formation and the Cambrian Longwangmiao Formation of the Gaoshiti-Moxi *** natural gas components,light hydrocarbons,reservoir bitumen abundance and other evidences prove that the dry natural gas was mainly derived from oil-cracking,with methane(a content of 82.65%-97.35%),ethane(a content of 0.01%-0.29%),nitrogen(a content of 0.44%-6.13%),helium(a content of 0.01%-0.06%),and hydrogen sulphide(0.62-61.11 g/m^(3)).Gas reservoir pressure increases gradually from the Sinian normal pressure(a pressure coefficient of 1.07-1.13)to high pressure(a pressure coefficient of 1.53-1.70)in the Cambrian Longwangmiao *** temperature of the gas reservoir is 137.5-163 ℃.Gas reservoir traps are divided into three categories:tectonic type,tectonic-formation type and tectonic-lithologic *** large-scale enrichment of the Sinian-Cambrian natural gas results from effective configuration of the large stable inherited palaeo-uplift during the Tongwan tectonic movement,wide distribution of ancient source rocks,high-quality reservoirs with vast pore-cavity,crude oil cracking of large palaeo-reservoirs and favorable preservation *** to the palaeo-structure pattern prior to crude oil cracking of the palaeo-reservoirs,and bitumen abundance as well as the distribution characteristics of current gas reservoirs,the accumulation patterns of the cracking gas reservoir can be classified into three types:accumulation type,sem

关键词： palaeo-uplift large gas field crude oil cracking gas accumulation mode Gaoshiti-Moxi Sichuan Basin

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Cambrian faults and their control on the sedimentation and reservoirs in the Ordos Basin, NW China

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Petroleum Exploration and Development 2019年第5期46卷 883-895页

作者： wei guoqi ZHU Qiuying YANG wei ZHANG Chunlin MO Wuling Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China

Comprehensively utilizing the seismic,logging,drilling and outcrop data,this research studies the characteristics of the Cambrian faults and their control on the sedimentation and reservoirs in the Ordos *** results show that:(1)Three groups of faults striking North-East(NE),near East-West(EW),and North-West(NW)were developed in the *** NE and near EW faults,dominated by the normal faults,are the synsedimentary faults and the main faults of the Cambrian.(2)According to the roles of faults in tectonic units and the development scale of the faults,the Cambrian faults can be divided into three *** second-grade faults,large in scale,controlled the boundary of the Cambrian sags of the Ordos *** third-grade faults,smaller in scale than the second-grade fault,controlled the high and low fluctuations of local *** fourth-grade faults,very small in scale,were adjusting faults developed inside the local tectonic units.(3)The Cambrian faults had strong control on the sedimentation and reservoir of the *** by the second-grade and the third-grade faults,the paleogeographical framework of the Cambrian presents combination characteristics of the bulge-sag macro-structures and the high-low differentiation *** paleogeographical pattern not only controlled the development of the oolitic beach facies in the Cambrian but also the distribution of high-quality reservoirs.(4)Under the control of the faults,the micro-paleogeomorphological high parts closely adjacent to the margin of the Cambrian sags are the favorable exploration areas.

关键词： Ordos Basin Cambrian fault characteristics fault grading paleogeographic pattern synsedimentary fault

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Hydrocarbon accumulation and exploration prospect of mound-shoal complexes on the platform margin of the fourth member of Sinian Dengying Formation in the east of Mianzhu-Changning intracratonic rift, Sichuan Basin, SW China

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Petroleum Exploration and Development 2020年第6期47卷 1262-1274页

作者： YANG wei wei guoqi XIE Wuren JIN Hui ZENG Fuying SU Nan SUN Ai MA Shiyu SHEN Juehong WU Saijun Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China

Drilling,seismic and logging data were used to evaluate the hydrocarbon accumulation conditions of the mound-shoal complexes in the platform margin of the fourth member of Sinian Dengying Formation in the east side of the Mianzhu-Changning intracratonic rift in the Sichuan *** four understandings are:(1)The platform margin belt of the Deng 4 Member can be divided into three sections,northern,middle and southern;the middle section is at the core of the Gaoshiti-Moxi paleouplift and the structural high now,while the southern and northern sections are at the slope of the paleouplift and the structural lows now;the three sections have similar development characteristics and reservoir features of platform margin mound-shoal complex.(2)In the margin of the east side of the rift,there are several faults nearly perpendicular to the platform margin belt,the faults divide the platform margin belt into rugged paleo-landform,and the high part developed platform margin mound-shoal complexes and the reservoirs are good in physical properties,while the low part developed inter-beach depression and no mound-shoal complexes,where the reservoirs are poor in physical properties.(3)The six groups of faults nearly perpendicular to the platform margin belt divide the platform margin belt into seven large mound-shoal complexes which have similar hydrocarbon accumulation conditions and accumulation evolution process and are rich in petroleum.(4)The inter shoal depressions between the mound-shoal complexes are characterized by tighter lithology,which can block the updip direction of the mounds and shoals at the lower part of the slope of the paleouplift and are favorable for the later preservation of mound-shoal gas *** has been proved by Well Jiaotan 1 and Heshen 2 drilled *** mound-shoal complexes on the platform margin of the structural slope area have a good exploration prospect.

关键词： Sichuan Basin fourth member of Sinian Dengying Formation mound-shoal complex at platform margin low structural area hydrocarbon accumulation exploration prospect

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安岳—奉节地区上震旦统—下寒武统陆架镶边台地地质特征及其对大气田(区)形成的控制作用

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石油学报 2023年第2期44卷 223-240,311页

作者：魏国齐贾承造杨威中国石油勘探开发研究院北京100083

上扬子克拉通震旦系—寒武系油气资源丰富,其中在德阳—安岳裂陷东侧,台缘带勘探取得了重大突破,其油气主要赋存于规模碳酸盐岩丘滩体中,规模丘滩储集体的预测是勘探的关键。在前人研究的基础上,应用露头、岩心、测井和地震等资料,对上... 详细信息

上扬子克拉通震旦系—寒武系油气资源丰富,其中在德阳—安岳裂陷东侧,台缘带勘探取得了重大突破,其油气主要赋存于规模碳酸盐岩丘滩体中,规模丘滩储集体的预测是勘探的关键。在前人研究的基础上,应用露头、岩心、测井和地震等资料,对上扬子克拉通的构造演化和岩相古地理进行了系统研究,提出了3点新认识。(1)上扬子克拉通东部发育一个近菱形的陆架镶边台地,称之为“安岳—奉节台地”;台地的西边界对应德阳—安岳裂陷的东边界,北边界即上扬子克拉通的北边界,东边界对应城口—鄂西裂陷的西边界,南边界对应湘中南大陆边缘海的北边界;台地发育在晚震旦世灯影组一段+灯影组二段沉积期—早寒武世龙王庙组沉积期,尤其在灯影组四段沉积期最为发育。(2)安岳—奉节台地发育台坪相、台地边缘相和斜坡—盆地相;台坪相发育于台地内,主要包括台内滩、云坪和潟湖等亚相;台地边缘相主要发育台地边缘丘、滩亚相;台地外的斜坡—盆地相以发育泥页岩为主;规模丘滩体沿台地边缘呈环带状分布,主要集中在灯影组二段、灯影组四段、沧浪铺组下段和龙王庙组。(3)安岳—奉节台地控制了四川盆地震旦系—寒武系大气田的形成与分布;台地边缘的高能相带控制了规模储层,台地周围的斜坡—盆地相内发育优质烃源岩,这种有利的源-储成藏组合形成了大型地层-岩性圈闭群,控制了油气规模聚集区。安岳—奉节台地可优选出3类6个有利勘探区块,总资源潜力为(6.5~9.0)×1012m3,这为下一步勘探部署提供了依据。研究成果丰富了碳酸盐岩沉积学和成储成藏地质理论,对勘探部署有重要意义。

关键词：安岳—奉节陆架镶边台地碳酸盐岩震旦系—寒武系油气勘探台缘丘滩体有利勘探区

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Sinian gas sources and effectiveness of primary gas-bearing system in Sichuan Basin, SW China

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Petroleum Exploration and Development 2021年第6期48卷 1260-1270页

作者： ZHAO Wenzhi XIE Zengye WANG Xiaomei SHEN Anjiang wei guoqi WANG Zecheng WANG Kun Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China Key Laboratory of Gas Reservoir Formation and Development CNPCLangfang 065007China Hangzhou Research Institute of Geology(HIPG) PetroChinaHangzhou 310023China

Based on correlation between geochemical characteristics of Sinian and Cambrian source rocks and discovered gas reservoirs,paleoand the analysis on geological conditions of reservoir formation,the sources of natural gas in the Sinian of Sichuan Basin have been discussed to sort out the contribution of Sinian source rocks to the gas reservoirs and effectiveness of Sinian primary gas-bearing *** the analysis of natural gas composition,carbon and hydrogen isotopes and effectiveness of Sinian accumulation assemblages,it is concluded that:(1)The natural gas derived from the Sinian source rock is characterized by low ethane content,heavy ethane carbon isotope and light methane hydrogen isotope,and obviously different from the gas generated by the Cambrian source rock.(2)The gas reservoirs discovered in Sinian Dengying Formation are sourced by Sinian and Cambrian source rocks,and the Sinian source rock contributes different proportions to the gas in the 4th member and the 2nd member of the Dengying Formation,specifically,39%and 55%to the 4th member in marginal zone and intra-platform,54%and 68%to the 2th member in the marginal zone and intra-platform respectively.(3)The effectiveness of the Sinian primary gas-bearing system depends on the gas generating effectiveness of the source kitchen,reservoir and combination of gas accumulation *** high-over mature marine source rocks at the Ro of less than 3.5%,besides gas generated from the thermal cracking of liquid hydrocarbon,the kerogen still has some gas generation potential by thermal *** addition,the Sinian microbial dolomite still preserves relatively good-quality reservoirs despite large burial depths,which match well with other basic conditions for gas accumulation in central Sichuan paleo-uplift,increasing the possibility of Sinian primary gas-bearing *** research results confirm that the Sinian primary gas-bearing system is likely to form large-scale accumulation.

关键词： natural gas carbon isotope hydrogen isotope geochemical characteristics gas and source rock correlation Sinian System primary gas-bearing system Sichuan Basin

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Exploration Trend of Large Gas Fields in China

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China Oil & Gas 2008年第2期15卷 22-26页

作者： Li Jingming wei guoqi Zhao Qun Li Xiaojun Langfang Branch of Research Institute of Petroleum Exploration and Development

China has abundant natural gas resources with low exploration level. The discovery rate of resources is 10% on the average, boasting a great potential. By the end

关键词：大型油气田勘探方向天然气资源天然气储量中国地质储量天然气田天然气行业

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Structural characteristics and petroliferous features of Tarim Basin

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Chinese Science Bulletin 2002年第S1期47卷 1-11页

作者： JIA Chengzao~1 & wei guoqi~2 1. PetroChina Company Limited, Beijing 100011, China 2. Langfang Branch of Research Institute of Petroleum Exploration & Development, PetroChina, Langfang 065007, China 1. PetroChina Company Limited 100011 Beijing China 2. Langfang Branch of Research Institute of Petroleum Exploration & Development PetroChina 065007 Langfang China

Using the modern tectonic geology theories andmethods such as the plate tectonic analysis, the paleo-struc-ture analysis, the structural-Iithofacies analysis, and the faultrelated fold and petroleum system, and combining with theseismic data, well drilling data and the circumferential fieldgeology, study on the structural characteristics and petro-leum prospect in the Tarim Basin has been carried out. Re-sults show that the Tarim Basin is a large superimpositionand combination basin with continental crustal basement,composed of a Paleozoic craton and Meso-Cenozoic forelandbasins. The characteristics of the basin are: the kernel partof the basin is the marine facies Paleozoic craton, superim-posed 4 continental facies foreland basins. Though the scaleof the paleozoic craton of the Tarim Basin is relatively small,the structure is steady. The petroleum prospect of the Paleo-zoic craton is: multiphase pool-generation and accumulationcontrolled by ancient uplift. The Meso-Cenozoic forelandbasins in the Tarim Basin, which are distributed on the era-tonic circumference and are a long-term subsidence, turnedinto rejuvenated foreland basins after the Meso-Cenozoicperiod. The petroleum prospects are: coal-bed generatinghydrocarbon, abundant natural gas, pool-generation in laterand recent periods, the oil and gas distribution controlled bythe foreland thrust belt. The structural characteristics ofTarim provide it with a superimposition and combinationpetroleum system of multiple resources, multiple reservoirsand multiphase pool-generation. The oil and gas explorationprospect covers two large fields: the Paleozoic craton and theMeso-Cenozoic foreland thrust belt.

关键词： Tarim superimposition and combination basin craton foreland basin superimposition and combination petroleum system.

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