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Chinese Science Bulletin 2007年第A1期52卷 178-183页

作者： MA YongSheng GUO TongLou ZHU GuangYou CAI XunYu xie zengye Exploration Company SINOPEC Beijing 100029 China Research Institute of Petroleum Exploration and Development PetroChina Beijing 100083 China

The reservoir of Feixianguan Formation of the Lower Triassic in the Sichuan Basin is the deepest buried carbonate reservoir in China, with developed secondary corrosion holes, high quantities carbonate reservoir, maximum effective carbonate reservoir thickness. Also Feixianguan gas reservoir has the highest quantities of H2S. Research discovers that there are close relationships between the formation of reservoir and H2S. The mutual actions between acidity fluid and carbonate promoted the forming of secondary carbonate holes. Through the experiment of corrosion of the samples of Feixianguan carbonate reservoir in saturated aqueous solution of hydrogen sulfide, the porosity and permeability increased greatly, porosity increased 2% and permeability increased nearly two quantity degrees, also the density became light, which confirm the corrosion and reform actions of H2S to carbonate.

关键词：腐蚀模拟碳酸盐 H2S 四川盆地

Geochemical Characteristics of the Upper Triassic Xujiahe Formation in Sichuan Basin, China and its Significance for Hydrocarbon Accumulation

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Acta Geologica Sinica(English Edition) 2017年第5期91卷 1836-1854页

作者： xie zengye LI Jian LI Zhisheng GUO Jianying LI Jin ZHANG Lu DONG Caiyuan Petrochina Research Institute of Petroleum Exploration and Development Langfang 065007HebeiChina Key Laboratory of Gas Reservoir Formation and Development CNPCLangfang 065007HebeiChina

The alternative development of coal-bearing hydrocarbon source rocks and low-porosity and low-permeability tight sandstone reservoirs of the Triassic Xujiahe Formation in the Sichuan Basin is favorable for near-source hydrocarbon accumulation. The natural gas composition of the Xujiahe Formation in the Sichuan Basin is dominated by hydrocarbon gases, of which the methane content is80.16%-98.67%. Typically, the C2^＋ content is larger than 5% in main wet gas. The dry gas is mainly distributed in the western and northern regions of the basin. The non-hydrocarbon gases mainly contain nitrogen, carbon dioxide, hydrogen, and helium, with a total content of 〈2%. The carbon isotope ranges of methane and its homologues in natural gas are： δ^13C1 of-43.8‰ to-29.6‰, δ^13C2 of-35.4‰ to-21.5‰, δ^13C3 of-27.6‰ to-19.8‰,and δ^13C4 of-27.7‰ to-18.8‰. δ^13C3〉δ^13C4 occurs in some natural gas with a low evolution degree; such gas is mainly coal-related gas from humic-type source rocks of the Xujiahe Formation. As for the natural gas, δ^2 HCH4 values ranged from-195‰ to-161‰,δ^2 HC2H6 values ranged from-154‰ to-120‰, and δ^2 HC2H8 values ranged from-151‰ to-108‰. The dry coefficient,δ^13C and δ^2 HC2H4 are all positively correlated with the maturity of source rocks. The higher the maturity of source rocks is, the larger the natural gas dry coefficient is and the larger the δ^13C and δ^2 HC2H4 values are, indicative of the characteristic of near-source accumulation. The δ^2 HC2H6 value of natural gas is influenced by paleosalinity to a relatively large extent; the higher the paleosalinity is, the larger the δ^2 HC2H4 value is. The Pr/Ph value of the condensate oil ranged from 1.60 to 3.43, illustrating light oxidization-light reduction and partial-oxidization characteristics of the depositional environment of coal-bearing source rocks of the Xujiahe Formation. The natural gas light hydrocarbon（C5-C7） from the Xujiahe Formation presented two characteristics： the first was the relatively

关键词： natural gas geochemistry isotopes light hydrocarbon Xujiahe Formation Sichuan Basin

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

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

Oil and gas source and accumulation of Zhongqiu 1 trap in Qiulitage structural belt, Tarim Basin, NW China

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Petroleum Exploration and Development 2020年第3期47卷 548-559页

作者： LI Jian LI Jin xie zengye WANG Chao ZHANG Haizu LIU Mancang LI Dejiang MA Wei MAO Danfeng ZENG Xu Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China The Key Laboratory of Gas Formation and Development PetroChinaLangfang 065007China Guangdong University of Petrochemical Technology Maoming 525000China Research Institute of Petroleum Exploration and Development PetroChinaTarim Oilfield CompanyKorla 841000China

Well Zhongqiu 1 obtained highly productive oil-gas stream in the footwall of Zhongqiu structure, marking the strategic breakthrough of Qiulitag structural belt in the Tarim Basin. However, the oil and gas sources in Zhongqiu structural belt and the reservoir formation process in Zhongqiu 1 trap remain unclear, so study on these issues may provide important basis for the next step of oil and gas exploration and deployment in Qiulitage structural belt. In this study, a systematic correlation of oil and gas source in Well Zhongqiu 1 has been carried out. The oil in Well Zhongqiu 1 is derived from Triassic lacustrine mudstone, while the gas is a typical coal-derived gas and mainly from Jurassic coal measures. The oil charging in Well Zhongqiu 1 mainly took place during the sedimentary period from Jidike Formation to Kangcun Formation in Neogene, and the oil was mainly contributed by Triassic source rock;large-scale natural gas charging occurred in the sedimentary period of Kuqa Formation in Neogene, and the coal-derived gas generated in the late Jurassic caused large-scale gas invasion to the early Triassic crude oil reservoirs. The Zhongqiu 1 trap was formed earlier than or at the same period as the hydrocarbon generation and expulsion period of Triassic-Jurassic source rocks. Active faults provided paths for hydrocarbon migration. The source rocks-faults-traps matched well in time and space. Traps in the footwall of the Zhongqiu structural fault have similar reservoir-forming conditions with the Zhongqiu 1 trap, so they are favorable targets in the next step of exploration.

关键词： Tarim Basin Kuqa foreland thrust belt Qiulitage structural belt oil and gas source oil and gas accumulation Zhongqiu1 trap

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Formation mechanisms,potentials and exploration practices of large lithologic gas reservoirs in and around an intracratonic rift:Taking the Sinian-Cambrian of Sichuan Basin as an example

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Petroleum Exploration and Development 2022年第3期49卷 530-545页

作者： WEI Guoqi YANG Wei xie Wuren SU NanX IE zengye ZENG Fuying MA Shiyu JIN Hui WANG Zhihong ZHU Qiuying HAO Cuiguo WANG Xiaodan Research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China

By examining structures,sediments,reservoirs and accumulation assemblages in the Deyang-Anyue rift and its surrounding area,four new understandings are ***,during the initiation period of Deyang-Anyue rift,multiple groups of faults developed in the rift due to the effect of tensile force,bringing about multiple mound and shoal belts controlled by horsts in the second member of the Sinian Dengying Formation;in the development stage of the rift,the boundary faults of the rift controlled the development of mound and shoal belts at the platform margin in the fourth member of Dengying Formation;during the shrinkage period of the rift,platform margin grain shoals of the Cambrian Canglangpu Formation developed in the rift ***,four sets of large-scale mound and shoal reservoirs in the second member of Dengying Formation,the fourth member of Dengying Formation,Canglangpu Formation and Longwangmiao Formation overlap with several sets of source rocks such as Qiongzhusi Formation source rocks and Dengying Formation argillaceous limestone or dolomite developed inside and outside the rift,forming good source-reservoir-cap rock combinations;the sealing of tight rock layers in the lateral and updip direction results in the formation model of large lithologic gas reservoirs of oil pool before gas,continuous charging and independent preservation of each gas ***,six favorable exploration zones of large-scale lithologic gas reservoirs have been sorted out through comprehensive evaluation,namely,mound and shoal complex controlled by horsts in the northern part of the rift in the second member of Dengying Formation,isolated karst mound and shoal complex of the fourth member of Dengying Formation in the south of the rift,the superimposed area of multi-stage platform margin mounds and shoals of the second and fourth members of Dengying Formation and Canglangpu Formation in the north slope area,the platform margin mounds and shoals of the second and fourth m

关键词： intracratonic rift large lithologic gas reservoir accumulation mechanism Sichuan Basin Sinian-Cambrian Deying-Anyue rift mound and shoal belt

Formation conditions of Sinian–Cambrian large lithologic gas reservoirs in the north slope area of central Sichuan Basin,SW China

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Petroleum Exploration and Development 2022年第5期49卷 963-976页

作者： WEI Guoqi xie zengye YANG Yu LI Jian YANG Wei ZHAO Luzi YANG Chunlong ZHANG Lu xie Wuren JIANG Hua LI Zhisheng LI Jin GUO Jianying PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China Key Laboratory of Gas Reservoir Formation and Development CNPCLangfang 065007China PetroChina Southwest Oil&Gas Field Company Chengdu 610051China

Based on analyses of characteristics,hydrocarbon charging history and geological conditions for the formation of Sinian-Cambrian reservoirs in the north slope area of central Sichuan paleo-uplift,the natural gas origin,accumulation evolution,accumulation pattern and formation conditions of large lithologic gas reservoirs have been *** comprehensive analyses of natural gas composition,carbon and hydrogen isotopic compositions,fluid inclusions,reservoir bitumen,and geological conditions such as lithofacies paleogeography and beach body characterization,it is concluded that:(1)The natural gas in the Sinian-Cambrian of the north slope area is mainly oil cracking gas,and different contribution ratios of multiple sets of source rocks lead to different geochemical characteristics of natural gas in different reservoirs.(2)Although the both Sinian and Cambrian gas reservoirs in this area are lithologic gas reservoirs under monocline background,the former has normal-pressure and the latter has *** are three types of source-reservoir-caprock combinations:single source with lower generation and upper reservoir,double sources with lower generation and upper reservoir or with side source and lateral reservoir,double sources with lower generation and upper reservoir or with upper generation and lower *** Permian-Triassic is the main generation period of oil,Early-Middle Jurassic is the main generation period of oil cracking gas and wet gas,and Late Jurassic-Cretaceous is the main generation period of dry gas.(3)The Sinian-Cambrian system of the north slope area has two favorable conditions for formation of large lithologic gas reservoirs,one is that the large scale beach facies reservoirs are located in the range of ancient oil reservoirs or near the source rocks,which is conducive to the"in-situ"large-scale accumulation of cracked gas in the paleo-oil reservoirs,the other is that the large scale mound-beach complex reservoirs and sealing

关键词： lithologic gas reservoir cracking gas accumulation pattern geochemical characteristics Sinian System Cambrian System Sichuan Basin

Petroleum geology of marl in Triassic Leikoupo Formation and discovery significance of Well Chongtan1 in central Sichuan Basin,SW China

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Petroleum Exploration and Development 2023年第5期50卷 1092-1104页

作者： WANG Zecheng XIN Yongguang xie Wuren WEN Long ZHANG Hao xie zengye ZHANG Jianyong TIAN Han LI Wenzheng FU Xiaodong SUN Haofei WANG Xiaofang HU Guoyi ZHANG Yu PetroChina Research Institute of Petroleum Exploration&Development Beijing 100083China Research Institute of Petroleum Exploration&Development PetroChina Southwest Oil&Gas Field CompanyChengdu 610041China Exploration Department PetroChina Southwest Oil&Gas Field CompanyChengdu 610041China

In 2022,the risk exploration well Chongtan1(CT1)in the Sichuan Basin revealed commercial oil and gas flow during test in a new zone–the marl of the second submember of the third member of Leikoupo Formation(Lei-32)of Middle Triassic,recording a significant ***,the hydrocarbon accumulation in marl remains unclear,which restricts the selection and deployment of exploration *** on Well CT1,the hydrocarbon accumulation characteristics of Lei-32 marl are analyzed to clarify the potential zones for *** following findings are ***,according to the geochemical analysis of petroleum and source rocks,oil and gas in the Lei-32 marl of Well CT1 are originated from the same *** marl acts as both source rock and reservoir ***,the Lei-32 marl in central Sichuan Basin is of lagoonal facies,with a thickness of 40–130 m,an area of about 40000 km^(2),a hydrocarbon generation intensity of(4–12)×10^(8) m^(3)/km^(2),and an estimated quantity of generated hydrocarbons of 25×10^(12) m^(3).Third,the lagoonal marl reservoirs are widely distributed in central Sichuan ***,in Xichong–Yilong,Ziyang–Jianyang and Moxi South,the reservoirs are 20–60 m thick and cover an area of 7500 km^(2).Fourth,hydrocarbons in the lagoonal marl are generated and stored in the Lei-32 marl,which means that marl serves as both source rock and reservoir *** represent a new type of unconventional resource,which is worthy of ***,based on the interpretation of 2D and 3D seismic data from central Sichuan Basin,Xichong and Suining are defined as favorable prospects with estimated resources of(2000–3000)×10^(8) m^(3).

关键词： Sichuan Basin central Sichuan Basin Triassic Leikoupo Formation lagoonal marl source-reservoir integration marine unconventional oil and gas

四川盆地上三叠统须家河组储层评价及天然气成藏机理

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天然气工业 2010年第12期30卷 10-15页

作者：杨威谢增业金惠施振生谢武仁中国石油勘探开发研究院廊坊分院

四川盆地上三叠统须家河组已进入大面积岩性气藏勘探的新阶段,为了给该区勘探部署以及储量评价提供地质依据,开展了砂体分布、储层展布及成因和成藏机理研究工作。具体工作和认识包括:①以层序地层学原理为指导,四位一体(测井、野外露... 详细信息

四川盆地上三叠统须家河组已进入大面积岩性气藏勘探的新阶段,为了给该区勘探部署以及储量评价提供地质依据,开展了砂体分布、储层展布及成因和成藏机理研究工作。具体工作和认识包括:①以层序地层学原理为指导,四位一体(测井、野外露头、岩心资料和地震资料分析),"井震"结合,建立了全盆地须家河组层序地层格架,认为6大物源体系形成6大三角洲砂体;②在格架范围内以体系域为单元研究地层、砂体的展布特征,预测有利储集砂体的分布,并分析不同类型砂体、相同砂体不同部位的储层特征及其发育的主控因素;③分析储层非均质性特征和优质储层的形成机理,划分储层类型,对研究区内储层进行综合评价,对优质储层发育的有利区带进行预测——加积式砂组中的高能河道为最高效的储层;④通过对广安、合川等典型气藏的解剖,针对须家河组低渗透砂岩气藏气水关系复杂、成藏机理复杂的特点,设计相应的地质模型和实验装置,开展了气水置换的成藏模拟试验,认为致密砂岩圈闭的充注为脉冲式充注,充注完成后在致密砂体和高孔渗砂体之间,存在多个含水滞留区带,而储层物性的相对差异是能否聚气的关键。该成果对于扩大四川盆地天然气勘探领域、寻找新的勘探接替区具有重大意义。

关键词：四川盆地晚三叠世成藏机理砂体展布储集层层序地层学圈闭气水关系

四川盆地晚三叠世碎屑组分对源区分析及印支运动的指示

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地质学报 2010年第3期84卷 387-397页

作者：施振生杨威谢增业金惠谢武仁中国石油勘探开发研究院廊坊分院河北廊坊065007

沉积物源分析是认识盆山演化的重要途径。四川盆地上三叠统的砾岩碎屑、砂岩骨架颗粒、碎屑重矿物组分显示,晚三叠世存在5大物源,它们分布于龙门山北段-中段、大巴山、龙门山南段、盆地东南和盆地南部。碎屑物源总体以"再旋回造山带"和... 详细信息

沉积物源分析是认识盆山演化的重要途径。四川盆地上三叠统的砾岩碎屑、砂岩骨架颗粒、碎屑重矿物组分显示,晚三叠世存在5大物源,它们分布于龙门山北段-中段、大巴山、龙门山南段、盆地东南和盆地南部。碎屑物源总体以"再旋回造山带"和"大陆板块"类型为主,其中,龙门山北段-中段和龙门山南段以"再旋回造山带"类型为主,而盆地东南部和南部以"大陆板块"类型为主。"再旋回造山带"类型可细分为"混合造山带"及"碰撞造山和褶皱冲断带"两种类型,龙门山北段和龙门山南段均以"混合造山带"及"碰撞造山和褶皱冲断带"类型为特征。盆地物源分布存在阶段性特征:早期,龙门山北段-中段、大巴山物源规模较大,盆地东南和南部规模较小;晚期,盆地东南和南部规模增大,各方向呈均衡分布格局,这与周缘板块构造活动的阶段性有关。晚三叠世,龙门山北段由西北向东南方向挤压,构造活动强度总体具有弱-强-弱的演变趋势。须二期,龙门山北段逆冲-推覆开始形成,并暴露水面遭受剥蚀,向盆地提供物源;须四期为盆地最活跃期,龙门山北段进一步挤压抬升剥蚀,盆内沉积中心也由西北向东南迁移;须四期后,龙门山北段剥蚀区继续向东南推进,但构造活动强度渐趋和缓。

关键词：四川盆地上三叠统碎屑组分源区印支运动