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Characteristics of geological structures in Shiling and Zhuanshanhu areas of Yehe Uplift,NE China

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Global Geology 2024年第2期27卷 105-120页

作者： GUAN Yue YU Yinghua ZHANG Yaxiong YUAN Hongqi Key Laboratory of oil and Gas Reservoir Formation Mechanism and Resource Evaluation in Heilongjiang Province Daqing 163318HeilongjiangChina Sinopec Petroleum Exploration and Production Research institute Beijing 100083China

The basin marginal fault system is the key to understand the formation and evolution of Songliao *** order to investigate the influence of marginal fault system on the structural evolution of Songliao Basin,a comprehensive study was conducted on Shiling Town and Zhuanshanhu area of Yehe Town in Siping City of Jilin Province,where is the southeastern margin of the Songliao Basin and there are a series of well-exposed fault,fold and intrusive bodies belonging to the main marginal fault system of the Songliao Basin known as the Jiamusi-Yitong(Jia-Yi)fault *** profile measurement and field investigation,samples with various lithologies and distinctive features were *** field and laboratory works include component and microstructure analysis of these samples,rock-rock contact analysis,main strike measurement and statistics *** data reveal the structural characteristics of the fold,fault and intrusive bodies in the study *** research results show that the folds are distributed in the Mesozoic strata near the main fault of the eastern branch of the Jia-Yi fault zone,and the folded strata involve the Cretaceous Denglouku and Quantou *** addition,the section is dominated by high-angle strikeslip thrust ***-colored veins and dark-colored veins are extensively distributed in the exposed *** analysis of joint and fault attitudes in the study area reveals a right-lateral strike-sliping along the main *** large-scale right-lateral strike-slip and thrust fault system in Shiling Town occurred in right-lateral transpressive stage in Late *** on the results above,tectonic evolution sequence in Shiling section of the Jia-Yi fault zone during the Mesozoic can be divided into five stages:Middle Jurassic left-lateral ductile strike-slip stage,Late Jurassic compression stage,Early Cretaceous tension stage,Early Cretaceous extension stage and Late Cretaceous right-lateral transpressive stage

关键词： Jia-Yi fault structural characteristics evolution sequence Shiling Zhuanshanhu northern segment Tanlu fault

Present geotemperature and its suggestion to natural gas generation in Xujiaweizi fault-depression of the northern Songliao Basin

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Science China Earth Sciences 2008年第S1期51卷 207-220页

作者： ZHOU QingHua 1,2 ,FENG ZiHui 3 &MEN GuangTian 3 1 Research institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China 2 Geological Logging Subcompany of daqing oil field Company Ltd.,daqing 163411,China 3 Research institute of Petroleum Exploration and Development of daqing oil field Company Ltd.,daqing 163732,China Research institute of Petroleum Exploration and Development PetroChina Beijing China Geological Logging Subcompany of daqing oil field Company Ltd. Daqing China Research institute of Petroleum Exploration and Development of daqing oil field Company Ltd. Daqing China

According to stastistic of present geotemperatures at the depths of 1000,2000,3000 and 4000 m,respectively in the Xujiaweizi fault-depression of the north Songliao Basin,the result indicates that Xujiaweizi fault-depression falls in the high geotemperature area,with the higher geothermal gradient in the depression layer than that in the fault-depression *** geothermal gradient decreases with the increasing of the *** thermal conductivity of rock greatly controls the geothermal *** main factors constraining the current geotemperature include thermal configuration of the earth's crust, deep faults,distribution and abundance of *** high geotemperature is in favour of generation of deep gas.

关键词： Xujiaweizi fault-depression geotemperature geothermal gradient thermal conductivity of rock deep layer natural gas

PALAEOMAGNETIC STUDY OF SONGLIAO BLOCK IN LATE MESOZOIC ERA

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Chinese Science Bulletin 1989年第3期34卷 220-222页

作者：方大钧高瑞琪王兆梁程学儒张兆华谢锦龙 Department of Geology Zhejiang University Hangzhou exploring and developing institute of daqing oil field

Songliao is one of the large continental oil basins of Eastern China covering an area of 260,000 km^2. It is a new type of introcratonic complex basin. The Upper Jurassic Series and whole Cretaceous have well developed upon the pre-Mesozoic folded base. The Upper Jurassic and Cretaceous Taonan Fro., Shahezi Fro. and Yingcheng Fro. are composed of volcanic rocks, volcanic clastic rocks and

关键词： Sonsliao Cretaceous magnetostratigraphy.

An unequal fracturing stage spacing optimization model for hydraulic fracturing that considers cementing interface integrity

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Petroleum Science 2023年第4期20卷 2165-2186页

作者： Xu Han Fu-Ping Feng Xiao-Chuan Zhang Jing Cao Jun Zhang Yu Suo Yan Yan Mao-Sen Yan Department of Petroleum Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangChina daqing oil field Limited-Liability Company Daqing163453HeilongjiangChina Tubular Goods Research institute of CNPC Xi’an710000ShaanxiChina

Determining reasonable fracturing stage spacing is the key to horizontal well *** from traditional stage spacing optimization methods based on the principle of maximum stimulated reservoir volume,in this paper,by considering the integrity of the wellbore interface,a fracture propagation model was established based on displacement discontinuity method and the competition mechanism of multifracture joint expansion,leading to the proposal of an unequal stage spacing optimization *** results show that in the first stage,the interfacial fractures spread symmetrically along the axis of the central point during that stage,while in the second and subsequent stages,the interfacial fractures of each cluster extend asymmetrically along the left and right *** are two kinds of interface connectivity behaviour:in one,the existing fractures first extend and connect within the stage,and in the other,the fractures first extend in the direction close to the previous stage,with the specific behaviour depending on the combined effect of stress shadow and flow competition during hydraulic fracture *** stage spacing is positively correlated with the number of fractures and Young’s modulus of the cement and formation and is negatively correlated with the cluster spacing and horizontal principal stress *** sensitivity is the strongest when the Young’s modulus of the cement sheath is 10-20 GPa,and the sensitivity of the horizontal principal stress difference is the weakest.

关键词： Hydraulic fracturing Cementing interface Fracture propagation Fracturing stage spacing Wellbore integrity

Analysis of Acoustic Emission Signal by Fractal Theory in Aluminum Alloy Spot Welding

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Transactions of Tianjin University 2007年第3期13卷 186-190页

作者：罗震董安单平邢志东 School of Material Science and Engineering Tianjin University daqing oil field Design and Research institute

The relation between acoustic emission signal and nugget during aluminum alloy spot welding was investigated in order to evaluate spot welding quality. Due to the nonlinearity of the signals, fractal theory was utilized to quantitatively describe the characteristics of the signals instead of classical Euclidean geometry which cannot describe the acoustic emission signal accurately. Through experiments and computing, the box counting dimension is found distinct from other acoustic emission signals and is a better approach to discriminating weld nugget stages. Results show that fractal dimensions increase from 1.51 to 1.78,and they are related to nugget areas added from non-fusion to over-heated nugget. And the box counting dimension can effectively evaluate the quality of the nugget in the spot welding and can be aoolied with current, displace, and other soot welding parameters.

关键词： aluminum alloy spot welding box counting dimension welding quality LabVIEW

INVESTIGATION AND APPLICATION ON GAS-DRIVE DEVELOPMENT IN ULTRA-LOW PERMEABILITY RESERVOIRS

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Journal of Hydrodynamics 2008年第2期20卷 254-260页

作者： ZHAO Ming-guo ZHOU Hai-fei CHEN Ding-feng Key Laboratory of Enhanced oil and Gas Recovery Minnistry of Education Daqing Petroleum Institute Daqing 163318 China

To select a proper displacement medium with the purpose of developing ultra-low permeability reservoirs both effectively and economically, three kinds of gases, including CO2, NG and N2, are studied through physical modeling and numerical simulation under the specified reservoir conditions. The results indicate that the oil recovery through water injection is relatively low in ultra-low permeability reservoirs, where the water breaks through early and the water cut rises rapidly. Gas injection can enhance the production, of which the gas-drive efficiency depends on the injection pressure and the gas itself. CO2 is proved to be the best one after comprehensive consideration of the recovery speed, the overall recovery efficiency and the time needed for gas to break through. The pressure of CO2 injection in the field experiments is lower, compared with that of water-drive. The injectivity index of CO2 is 7.2 times as high as that of water, and the oil production of the test well group increases by about 4 t/d.

关键词： ultra-low permeability reservoir gas drive physical modeling numerical simulation field experiment

exploring pore-scale production characteristics of oil shale after CO_(2) huff‘n’puff in fractured shale with varied permeability

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International Journal of Coal Science & Technology 2024年第1期11卷 194-203页

作者： Tianhan Xu Jian Wang Yuhao Lu Danling Wang Li Yu Ye Tian State Key Laboratory of oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengdu610500SichuanChina institute for Carbon Neutrality Southwest Petroleum UniversityChengdu610500SichuanChina Research institute of Shenzhen Branch of CNOOC(China)Co. LtdShenzhen518000GuangdongChina PetroChina Huabei oilfield Company Cangzhou062552HebeiChina

Recent studies have indicated that the injection of carbon dioxide(CO_(2))can lead to increased oil recovery in fractured shale reservoirs following natural *** advancements in understanding mass exchange processes in subsurface formations,there remains a knowledge gap concerning the disparities in these processes between the matrix and fractures at the pore scale in formations with varying *** study aims to experimentally investigate the CO_(2) diffusion behaviors and in situ oil recovery through a CO_(2) huff‘n’puff process in the Jimsar shale oil *** achieve this,we designed three matrix-fracture models with different permeabilities(0.074 mD,0.170 mD,and 0.466 mD)and experimented at 30 MPa and 91℃.The oil concentration in both the matrix and fracture was monitored using a low-field nuclear magnetic resonance(LF-NMR)technique to quantify in situ oil recovery and elucidate mass-exchange *** results showed that after three cycles of CO_(2) huff‘n’puff,the total recovery degree increased from 30.28%to 34.95%as the matrix permeability of the core samples increased from 0.074 to 0.466 mD,indicating a positive correlation between CO_(2) extraction efficiency and matrix *** similar fracture conditions,the increase in matrix permeability further promoted CO_(2) extraction efficiency during CO_(2) huff‘n’***,the increase in matrix permeability of the core had the greatest effect on the extraction of the first-cycle injection in large pores,which increased from 16.42%to 36.64%.The findings from our research provide valuable insights into the CO_(2) huff‘n’puff effects in different pore sizes following fracturing under varying permeability conditions,shedding light on the mechanisms of CO_(2)-enhanced oil recovery in fractured shale oil reservoirs.

关键词： Shale reservoir Hydraulic fracturing CO_(2)huff‘n’puff NMR Production characteristics

Fracture Mechanism of the Formation with a Natural Flaw Under a Single-Tooth Cutting

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Acta Mechanica Solida Sinica 2020年第5期33卷 719-730页

作者： Siqi Li Wei Li Tie Yan Fuqing Bi Huan Zhao Xin Ling institute of Petroleum Engineering Northeast Petroleum UniversityDaqing163318HeilongjiangChina The Fifth oil Production Plant of daqing oilfield Daqing163513HeilongjiangChina

The process of a single-tooth cutting formation is taken as the representative to analyze the fracture mechanism of the formation with natural flaws under the PDC drill *** modeling of the stress field distribution of the formation under a single tooth is proposed ***,the modeling of the stress intensity factor K,T-stress and the initiation angleθof the flaw under two far-field compressive loads in two cases are presented based on the mode-II ***,the results of theoretical calculations and simulations are given and *** on the analysis undertaken,it can be concluded that the confinement ratioλapplying on the flaw changes nonlinearly with the variation inα+φ.The relationship between the dimensionless ratioβx/βy of T-stress and the rotational polar angleφis a parabola with an upward *** the direction of the cutting force is consistent with the flaw,the stress intensity factor K and the initiation angleθat the tip of the flaw reach the *** addition,the angle between the cutting force and the flaw weakens the T-stress and inhibits the crack initiation and propagation of the *** results of numerical simulations show good agreement with theoretical calculations.

关键词： Single-tooth cutting Stress field Stress intensity factor Initiation angle Extended finite element

Late Cretaceous palynology and paleoclimate change:Evidence from the SK1(South) core, Songliao Basin, NE China

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Science China Earth Sciences 2014年第12期57卷 2985-2997页

作者： ZHAO Jing WAN XiaoQiao XI DangPeng JING Xia LI Wei HUANG QingHua ZHANG JinYan State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Exploration and Development Research institute of Huabei oil field Corporation Ltd. Guangzhou Marine Geological Survey Exploration and Development Research institute of daqing oil field Corporation Ltd.

Cretaceous climate was warmer than *** Songliao Basin contains one of the most important Late Cretaceous non-marine deposits in China for the research of the paleoenvironment and *** research is based on core samples from the SK1(S)*** strata sampled are the upper part of the Quantou Formation to member 2 of the Nenjiang Formation,where spores,pollen,dinoflagellates,and other microfossils are abundantly *** on analysis of the spores and pollen fossils from the core samples,the following six fossil assemblage zones have been recognized in ascending order:The Cicatricosisporites-Cyathidites-Pinuspollenites,Schizaeoisporites-Cyathidites-Classopollis,Cyathidites-Schizaeoisporites,Schizaeoisporites-Cyathidites-Proteacidites,Proteacidites-Cyathidites-Dictyotriletes,and the Lythraites-Callistipollenites-Schizaeoisporites *** six fossil zones range from the late Cenomanian to early *** Late Cretaceous dinoflagellate cysts in the Songliao Basin are of high abundance and low *** phytoplankton types reflect salinity changes of the Songliao *** of the dinoflagellates suggests that sediments of members 2 and 3 of the Yaojia Formation(K2y2+3)were deposited in a freshwater environment,whereas members 2 and 3 of the Qingshankou Formation(K2q2+3)and members 1 and 2 of the Nenjiang Formation(K2n1+2)were deposited in freshwater to brackish water *** with the paleoecology of dinoflagellates and the palynomorph biozones,valuable information of the paleoclimate was *** quantitative analyses of spores and pollen fossils,such as vegetation type,climate type,and humidity type,diversity and dominance,indicate a relatively sub-humid,mid-subtropical paleoclimate,with slight climatic fluctuation and/or temporal change.

关键词： Late Cretaceous Songliao Basin spores and pollen dinoflagellate paleoclimate