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Fault reactivation in No.4 structural zone and its control on oil and gas accumulation in Nanpu sag,Bohai Bay Basin,China

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Petroleum exploration and development 2022年第4期49卷 824-836页

作者： LIU Lu SUN Yonghe CHEN Chang LOU Rui WANG Qi Earth Science College Northeast Petroleum UniversityDaqing 163318China institute of Chongqing Unconventional Oil and Gas development Chongqing University of Science and TechnologyChongqing 401331China Chongqing Key Laboratory of Complex Oil&Gas Field exploration and development Chongqing 401331China Liaohe Oilfield Company CNPCPanjin 124010China

Based on seismic and drilling data,the reactivation mechanism of the pre-existing basement F4 strike-slip faultin Nanpu sag and its controlling effect on hydrocarbon accumulation difference are systematically *** defining fault activation stages,back-stripping fault throw and physical modeling,it is found that the Nanpu No.4 structural zone formed by the Cenozoic reactivity of the F4 fault grew from south to north,with strike-slip deformation dominated in the south and extensional deformation dominated in the *** in the No.4 structural zone and those in the adjacent No.2 and No.3 structural zones were different fault systems,which grew separately,contacted and connected,and finally interwove under the action of unified stress *** constructing the identification chart of deformation mechanisms of reactivation of pre-existing faults,it is concluded that during the sedimentary period of the Paleogene Shahejie Formation,F4 fault was reactivated by strike-slip faulting,and during the sedimentary period of Paleogene Dongying Formation and Neogene Guantao-Minghuazhen formations,it was reactivated by oblique *** controlling effects of Cenozoic reactivation of F4 fault on hydrocarbon accumulation include:(1)As the oil-source fault,it controlled the vertical cross-layer migration of oil and gas.(2)It gave rise to strike-slip transfer zone to control the distribution of sand bodies.(3)It grew upward and interacted with faults in the neighboring area,controlling the formation of two types of traps,and was favorable for oil and gas accumulation.

关键词： Bohai Bay Basin Nanpu sag Cenozoic strike-slip fault pre-existing fault fault reactivation identification template physical simulation experiment hydrocarbon accumulation

Detrital K-feldspar^(40)Ar/^(39)Ar Ages:Source Constraints of the Lower Miocene Sandstones in the Pearl River Mouth Basin,South China Sea

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Acta Geologica Sinica(English Edition) 2012年第2期86卷 383-392页

作者： LIU Zaisheng SHI Hesheng ZHU Junzhang QIU Huaning ZHANG Zhilin YUN Jianbing CNOOC China Limited Shenzhen Shenzhen 518067China State Key Laboratory of Isotopic Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China Hailaer Petroleum exploration and development Headquarters PetroChina Daqing Oilfield Company Ltd.Hailar 021000China

The South China Sea began to outspread in the Oligocene. A great quantity of terraneous detritus was deposited in the northern continental shelf of the sea, mostly in Pearl River Mouth Basin, which constituted the main paleo-Pearl River Delta. The delta developed for a long geological time and formed a superimposed area. Almost all the oil and gas fields of detrital rock reservoir distribute in this delta. Thirty-three oil sandstone core samples in the Zhujiang Formation, lower Miocene （23-16 Ma）, were collected from nine wells. The illite samples with detrital K feldspar （Kfs） separated from these sandstone cores in four sub-structural belts were analysed by the high-precision 40Ar/39Ar laser stepwise heating technique. All 33 illite 40Ar/39Ar data consistently yielded gradually rising age spectra at the low-temperature steps until reaching age plateaus at mid-high temperature steps. The youngest ages corresponding to the beginning steps were interpreted as the hydrocarbon accumulation ages and the plateau ages in mid-high temperature steps as the contributions of the detrital feldspar representing the ages of the granitic parent rocks in the provenances. The ages of the detrital feldspar from the Zhujiang Formation in the four sub-structural belts were different：（1） the late Cretaceous ages in the Lufeng 13 fault structural belt; （2） the late Cretaceous and early Cretaceous-Jurassic ages in the Huizhou 21 buried hill-fault belt; （3） the Jurassic and Triassic ages in the Xijiang 24 buried hill-fault belt; and （4） the early Cretaceous - late Jurassic ages in the Panyu 4 oil area. These detrital feldspar 4~Ar/39Ar ages become younger and younger from west to east, corresponding to the age distribution of the granites in the adjacent Guangdong Province, Southern China.

关键词： Illite detrital K feldspar 40Ar/39Ar dating parent rock sandstone reservoir Pearl River Mouth Basin

Main controlling factors and accumulation mode of the sandy conglomerates reservoir in the Fangzheng fault depression, Songliao Basin, China

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Main controlling factors and accumulation mode of the sandy ...

2023年中国地球科学联合学术年会

作者： Lu Guoqiang exploration and development Research institute of daqing Oilfield Co Ltd

The Fangzheng Fault, as a rift basin located in the northern part of the Yi-Shu graben. A number of wells in the Cretaceous system of the Fangzheng Fault have seen industrial oil flow, and the prospect of oil and gas exploration is good. In this paper, we explore the matching relationship between reservoir densification time and hydrocarbon filling through rock thin section, scanning electron microscopy, energy spectrum analysis and fluid inclusion microfluorescence, homogeneous temperature and freezing point testing techniques to further understand the process of oil and gas formation in Fangzheng Fault.

关键词： Main controlling factors and accumulation mode of the sandy conglomerates reservoir in the Fangzheng fault depression Songliao Basin

Heterogeneity Characteristics of Tight Reservoir and Gas Accaccumulation in Member 2 of Xujiahe Formation, Yingshan area, Northeast Sichuan

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Heterogeneity Characteristics of Tight Reservoir and Gas Acc...

2020年中国地球科学联合学术年会

作者： Wang Youzhi exploration and development Research institute of daqing Oilfield Company Ltd

Tight gas reservoirs are widely developed in the Xujiahe Formation of the Sichuan Basin. Due to the strong heterogeneity of the reservoir, the gas-water relationship is complicated and the exploitation results are poor. The characteristics of the tight reservoir are systematically analysised in the Member2 of Xujiahe Formation of Yingshan area by thin sections and argon ion polishing scanning electron microscopy techniques. In combination with with X-ray diffraction, stable carbon and oxygen isotope, trace elements, the formation mechanism of heterogeneity of tight reservoir is analyzed and the matching relationship between gas accumulation and development of tight reservoir is discussed. The results show that the reservoirs of Member2 of Xujiahe Formation in Yingshan area are mainly composed of feldspar quartz sandstone, lithic feldspar sandstone, and feldspar lithic sandstone. The types of storage space are mainly intergranular pores and intragranular dissolved pores, with an average porosity of 9.47% and an average permeability of 0.14×10-3μm. They are low-porosity and low-permeability reservoirs. The study area experienced relatively strong mechanical compaction, which severely damaged the primary porosity of the reservoir, with an average decrease of 15.27%, which is the main reason for the overall densification of the Member2 of Xujiahe Formation. However, the change of the vertical physical properties of the Member2 of Xujiahe Formation is closely related to the calcite metasomatism and cementation. The tight layer usually appears in the middle of the thick sandstone, with a thickness of 2 to 4 m and a certain distribution range in the transverse direction. The cement and metabolites of calcite mainly form the Middle and Late Cretaceous. At this time, the formation temperature is 120～140℃, and the source rocks are at the peak period of hydrocarbon generation. Thus the high carbonate mineral composition in the source rock of Yingshan area, the organic acid-ric

关键词： tight reservoir heterogeneity diagenesis Xujiahe Formation Yingshan area

Geologic Characteristics of Volcanic Hydrocarbon Reservoirs and exploration Directions in China

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Acta Geologica Sinica(English Edition) 2010年第1期84卷 194-205页

作者： ZOU Caineng ZHU Rukai ZHAO Wenzhi JIA Chengzao ZHANG Guangya YUAN Xuanjun ZHAO Xia WEN Baihong State Key Laboratory of Enhanced Oil Recovery. （Research institute of Petroleum exploration and development） Beijing 100083

Volcanic rocks are distributed widely in China, which are important exploration targets. By analyzing many discovered volcanic hydrocarbon reservoirs all over the world, the authors summarized the geologic characteristics of the formation of volcanic hydrocarbon reservoirs in China, and gave further exploration directions and advices. （1） There are mainly Carboniferous-Permian, Jurassic-Cretaceous, Paleogene-Neogene volcanic rocks in oil- and gas-bearing basins in China, which are mainly distributed in the Junggar Basin, Songliao Basin, Bohai Bay Basin, etc. There are mainly intermediate rocks and acidic rocks in east China, and intermediate rocks and basic rocks in west China. They primarily develop in intracontinentai rift settings and island arc environments. （2） Porefissure reservoirs are distributed widely in basins, which are volcanic rocks mainly in explosive and effusive facies. （3） Volcanic hydrocarbon reservoirs are chiefly near-source lithostratigraphic hydrocarbon reservoirs, and the oil and gas accumulation is predominantly controlled by lithotypes, faults and structural positions. （4） Deep-seated oil and gas reservoirs in the Songliao Basin and Carboniferous volcanic hydrocarbon reservoirs in the Junggar Basin are potential giant volcanic gas provinces, the volcanic hydrocarbon reservoirs in the Bohai Bay Basin and Santanghu Basin are favorable for oil and gas reserves increase, and volcanic rocks in the Turpan Basin, Sichuan Basin, Tarim Basin have exploration potentiality. （5） The technology series of oil and gas exploration in volcanic rocks have been preliminarily formed.

关键词： volcanic rock geologic characteristics of volcanic hydrocarbon reservoirs lithostratigraphic hydrocarbon reservoirs exploration direction

Establishment and Application of a New Model for Predicting Oil Production in Complex Lithologic Reservoirs

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Establishment and Application of a New Model for Predicting ...

作者： Pengju DU exploration and development Research institute Daqing Oilfield Co Ltd

At present,the oil field production prediction models at home and abroad mainly use ARPS production decline formula,which is mainly used in high water cut oil fields with good physical properties,large scale and single ***,for the complex lithologic fault block oil field in the middle and low water cut stage,the application effect is not *** present,the corresponding prediction model research examples are not published,especially for the complex lithologic oil *** this paper,the relationship between relative permeability of oil phase and water saturation of sandstone and glutenite reservoir is expressed by binomial formula,and the fitting accuracy is higher than 90%.Using binomial formula and reservoir engineering method,a prediction model of oil production is *** application results of developed blocks show that the new production prediction model can predict the oil production of complex lithologic reservoirs with an accuracy of more than 90%,and can guide the development prediction of similar fault block oilfields.

关键词： complex lithologic reservoir binomial oil relative permeability production prediction model Instruction

Characteristics of micro-pore structure and main controlling factors of physical properties in tight sandstone reservoirs of the Xujiahe Formation

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Characteristics of micro-pore structure and main controlling...

2023年中国地球科学联合学术年会

作者： Wang zhiguo exploration and development Research institute of daqing Oilfield Co Ltd

The heterogeneity of the tight sandstone reservoirs of the Xujiahe Formation in northeast Sichuan is strong, and the gas-water relationship is complicated, which seriously restricts efficient exploration and development. Therefore, clarifying the main rock types, revealing the micro-pore structural characteristics of the reservoirs, and the main controlling factors of the physical properties can help to understand the spatial evolution regulations of the high-quality gas reservoirs, and to identify the favorable areas of the sweetspot of the tight sandstone reservoirs of the Xujiahe Formation in northeast Sichuan, thus further liberating the resource potential of the Xujiahe Formation. In this paper, 36 samples of dense sandstone of the Xujiahe Formation from the YQ1 well in northeast Sichuan were selected to reveal the main rock types and mineral components of the dense sandstone of the Xujiahe Formation in northeast Sichuan, to clarify the characteristics of the micropore structure, and to explore the main controlling factors of its physical heterogeneity by using experimental methods such as XRD, FE-SEM, low-temperature N2, MICP, and NMR as well as well-logging data. The results show that the sandstones of the Xujiahe Formation in northeastern Sichuan are mainly composed of quartz and feldspar, with a small amount of carbonatite and clay, of which the lithology of the Xu3 lower of the Xujiahe Formation is dominated by feldspathic quartz sandstone, feldspathic feldspathic sandstone, feldspathic sandstone, and feldspathic sandstone, sections 4 and 6 are mainly feldspathic quartz sandstone and clastic quartz sandstone;The Xu3 lower and Xu4 are mainly intergranular pores, heterogeneous matrix pores and intra-granular dissolution pores, and are mainly matrix pore-type reservoirs, while the Xu6 is mainly micro-cracks and intergranular pores, and develops fracture-type reservoirs, and the physical properties of the reservoirs gradually deteriorate from the Xu3 lower s t

关键词： microscopic pore structures heterogeneity controlling Factors tight sandstone reservoirs xujiahe formation

Rhenium-osmium(Re-Os)geochronology of crude oil from lacustrine source rocks of the Hailar Basin,NE China

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Petroleum Science 2021年第1期18卷 1-9页

作者： Qi-An Meng Xue Wang Qiu-Li Huo Zhong-Liang Dong Zhen Li Svetlana GTessalina Bryant DWare Brent IAMcInnes Xiao-Lin Wang Ting Liu Li Zhang exploration and development Research institute Daqing Oilfield Co.Ltd.Daqing 163712HeilongjiangChina Heilongjiang Provincial Key Laboratory for the Study of Tight Oil and Shale Oil Accumulation Daqing 163712HeilongjiangChina John de Laeter Centre Faculty of Science and EngineeringCurtin UniversityGPO Box U1987PerthWA 6485Australia State Key Laboratory for Mineral Deposits Research School of Earth Sciences and EngineeringNanjing UniversityNanjing 210023JiangsuChina

Re-Os radiometric dating of crude oil can be used to constrain the timing of hydrocarbon generation,migration or *** approach has been successfully applied to marine petroleum systems;however,this study reports on its application to lacustrine-sourced natural crude *** s amples from multiple wells producing from the Cretaceous Nantun Formation in the Wuerxun-Beier depression of the Hailar Basin in NE China were *** of the Re-Os data are compatible with a Cretaceous hydrocarbon generation event(131.1±8.4 Ma)occurring within 10 Myr of deposition of the Nantun Formation source *** addition,two younger age trends of 54±12 Ma and 1.28±0.69 Ma can be regressed from the Re-Os data,which may reflect the timing of subsequent hydrocarbon generation *** Re-Os geochronometer,when combined with complementary age dating techniques,can provide direct temporal constraints on the evolution of petroleum system in a terrestrial basin.

关键词： Re-Os dating Lacustrine crude oils Hailar basin Petroleum system evolution

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