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Comparison of the Pore Structure of Ultralow-Permeability Reservoirs Between the East and West Subsags of the Lishui Sag Using Constant-Rate Mercury Injection

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Journal of Ocean University of China 2021年第2期20卷 315-328页

作者： WANG Jinkai zhang jinliang SHEN Wenlong LIU Hengyi Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China College of Geological Science and Engineering Shandong University of Science and TechnologyQingdao 266590China CNOOC Ltd. Shanghai BranchShanghai 200335China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

In this study, the differences in reservoir parameters, such as pore radius, throat radius, and pore-throat ratio, between the east and west subsags of the Lishui Sag are analyzed by using data obtained from a constant-rate mercury injection experiment. Furthermore, the quality of the reservoirs in the two subsags is systematically evaluated. Results show that the throat radius of the Lishui west subsag is larger than that of the east subsag, and this parameter has a positive correlation with reservoir quality. However, the pore-throat ratio of the east subsag is larger than that of the west subsag, which has an inverse relationship with reservoir quality. The main reasons for this reservoir difference can be attributed to sedimentation and diagenesis. The sedimentary facies types of the Lishui east subsag are the fan delta, shore lake, shallow lake, and shore shallow lake;their sandstone composition maturity is low;the clay mineral content is high;and the rock has undergone strong diagenesis. Therefore, the physical conditions of the reservoir are poor. However, the sandstones in the Lishui west subsag have weak cementation and compaction, mainly with an intergranular pore structure type, which leads to good connectivity between pores. Therefore, the storage performance and seepage capacity of the Lishui west subsag are better than those of the east subsag;the west subsag is the main area of oil and gas accumulation, as confirmed in the process of exploration and development.

关键词： Lishui Sag constant-rate mercury injection sedimentary facies diagenesis rock pore structure

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Quantitative reconstruction of the palaeoclimate of the Shahejie Formation in the Chezhen Depression,Bohai Bay Basin,eastern China

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Frontiers of Earth Science 2021年第4期15卷 909-921页

作者： Tao CHEN jinliang zhang Yang LI Yongfu ZHAO Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze UniversityWuhan 430100China Oil and Gas Exploration Management Center Shengli OilfieldSinopecDongying 257000China

This paper uses pollen climate analysis and coexistence analysis to systematically analyze the climatic evolution of the Shahejie Formation in the Chezhen Depression,Bohai Bay Basin,eastern China and discusses the relationship between palaeoclimatic evolution and lake level *** results show that the sedimentary period of the Shahejie Formation in the Chezhen Depression had an overall temperature change trend from hot to cold and simultaneously experienced a dry and wet balance-wet-dry and wet balance-wet transition *** climatic parameters of the Shahejie Formation in the Chezhen Depression include a mean annual temperature of 8.1℃-15.1℃,a mean coldest monthly temperature of-0.1℃-2℃,a mean warmest monthly temperature of 18.6℃-28℃,a mean annual precipitation of 389-1164 mm,a wettest monthly precipitation amount of 215-262 mm,and a driest monthly precipitation amount of 8-48 *** change is believed to affect the rise and fall of lake levels to some *** quantitative reconstruction of these climatic parameters allows researchers to more intuitively understand the geological background of the Chezhen Depression and guide the exploration and development of oil and gas resources.

关键词： Shahejie Formation Chezhen Depression pollen coexistence analysis palaeoclimate reconstruction

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Paleosalinity and lake level fluctuations of the 3rd Member of Paleogene Shahejie Formation,Chezhen Sag,Bohai Bay Basin

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Frontiers of Earth Science 2022年第4期16卷 949-962页

作者： Long SUN jinliang zhang Yang LI Xue YAN Xuecai zhang Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze UniversityWuhan 430100China Oil and Gas Exploration Management Center Sinopec Shengli OilfieldDongying 257000China

The Chezhen Sag,located in the north-western Jiyang Depression,is one of the most important oil-bearing sags in the Bohai Bay *** to the low degree of exploration in the sag,paleosalinity and sedimentary environment of the sag in the 3rd Member of Paleogene Shahejie Formation(Es3)is not *** the paleosalinity and lake level fluctuations is helpful for understanding organic matter rich rocks ***,a detailed geochemical,mineralogical and paleontological analysis of the Es3 in the Chezhen Sag was *** like Sr/Ba ratios,B/Ga ratios,equivalent boron content and methods concluding Adams'formula and Couch's method were adopted to reveal the paleo-salinity and lake level *** results indicate that the lower submember(Lower Es3)was deposited in a salt water with high salinity,accompanied by dry climate and transgression *** middle submember(Middle Es3)and upper submember(Upper Es3)record a freshwater to brackish *** paleosalinity and paleoclimate changes are consistent with the global sea level *** type and content of sporopollen indicate a dry climate in Lower Es3,which further confirms the reliability of the reconstruction results of *** with the paleoclimate and previous marine paleontological evidence,we proposed that the high salinity period is associated with a high lake level and a large-scale transgression event in Lower *** to salinities and corresponding Lake depths,we established a sedimentary environment variation model of the Es3 Member in Chezhen Sag.

关键词： Chezhen Sag paleosalinity paleoclimate boron lake level

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Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled with high-pressure waterjet

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Frontiers of Structural and Civil Engineering 2023年第9期17卷 1370-1386页

作者： He FEI Yiqiang LU jinliang zhang Xingchen LUO Yimin XIA College of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China China Railway Engineering Equipment Group Co. Ltd.Zhengzhou 450016China College of Civil Engineering Tongji UniversityShanghai 200092China Yellow River Engineering Consulting Co. Ltd.Zhengzhou 450003China

The tunnel boring machine(TBM)is typically used in hard-rock tunnel *** to the unsatisfactory adaptability of TBM to the surrounding rock,when crossing high-strength and high-wear strata,the TBM can easily cause defects,such as abnormal wear on cutters and overload damage to bearings,thus affecting the construction efficiency and ***,high-pressure waterjet technology should be applied to assist in rock breaking for efficient TBM *** this study,the effects of water pressure,nozzle diameter,and nozzle speed on cutting are investigated via laboratory experiments of cutting hard rock using high-pressure *** penetration performance of the TBM under different water pressures is investigated via a field industrial penetration *** results show that high-pressure waterjets are highly efficient for rock breaking and are suitable for industrial applications,as they can accommodate the advancing speed of the TBM and achieve high-efficiency rock ***,during the operation of high-pressure waterjets,the ambient temperature and waterjet temperature in the tunnel increase significantly,which weakens the cooling effect of the cutterhead and decreases the construction efficiency of the ***,temperature control and cooling measures for high-pressure waterjets during their long-term operation must be *** study provides a useful reference for the design and construction of high-pressure water-jet-assisted cutterheads for breaking road headers.

关键词： tunnel boring machine hard-rock cutting free face disc cutter rock-cutting efficiency

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First-principles study on electronic structure and optical properties of N-doped P-type β-Ga_2O_3

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Science China(Physics,Mechanics & Astronomy) 2012年第1期55卷 19-24页

作者： zhang LiYing YAN jinliang zhang YiJun LI Ting DING XingWei School of Physics Ludong University Yantai 264025 China

The band structure, density of states, electron density difference and optical properties of intrinsic β-Ga2O3 and N-doped β-Ga2O3 were calculated using first-principles based on density functional theory. After N doping, the band gap decreases, shallow acceptor impurity levels are introduced over the top of the valence band and the absorption band edge is slightly red-shifted compared to that of the intrinsic one. The anisotropic optical properties are investigated by means of the complex dielectric function, which are explained by the selection rule of the band-to-band transitions. All calculation results indicate that N-doping is a very promising method to get P-type β-Ga2O3.

关键词： P-type β-Ga2O3 N-doped β-Ga2O3 first-principles electronic structure optical properties

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Diagenesis and Its Effect on Reservoir Quality of Silurian Sandstones,Tabei Area,Tarim Basin,China

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Petroleum Science 2007年第3期4卷 1-13页

作者： zhang jinliang Jia Ying Du Guilin School of Geosciences Ocean University of China Qingdao Shandong 266003 China

The diagenetic processes of the Tabei sandstones in the Tarim Basin include compaction, cementation （quartz overgrowths, calcite, clay minerals and a minor amount of pyrite）, and dissolution of the feldspar and calcite cement. Porosity was reduced by compaction from an assumed original 40% to about 22.1%. Cementation reduced porosity to 26.6%. The Tabei sandstones lost a little more porosity by compaction than by cementation. Quartz cementation, especially syntaxial quartz overgrowth, is a major cause of porosity-loss in many reservoirs in moderately to deeply buried sandstone. Calcite cementation played a key role in the porosity evolution of sandstones. At the early stage of burial, the early calcite cement occupied most of the pore spaces resulting in significant porosity. On the other hand, some primary porosity has been preserved due to incomplete filling or the presence of scattered patches of calcite cement. In addition to calcite, several clay minerals, including illite and chlorite occurred as pore-filling and pore-lining cements. The pore-lining chlorite may have helped in retaining the porosity by preventing the precipitation of syntaxial quartz overgrowths. Illite, which largely occurred as hair-like rims around the grains and bridges on the pore throats, caused a substantial deterioration of penetrability of the reservoir. Calcite cement dissolution was extensive and contributed significantly to the development of secondary porosity.

关键词： Tarim Basin diagenesis secondary pore reservoir quality

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A review of selective laser melting of aluminum alloys: Processing,microstructure, property and developing trends

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Journal of Materials Science & Technology 2019年第2期35卷 270-284页

作者： jinliang zhang Bo Song Qingsong Wei Dave Bourell Yusheng Shi State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and Engineering Huazhong University of Science and Technology Dave Bourell Laboratory for Freeform Fabrication Mechanical Engineering Department The University of Texas at Austin

Selective laser melting(SLM) is an attractive rapid prototyping technology for the fabrication of metallic components with complex structure and high performance. Aluminum alloy, one of the most pervasive structural materials, is well known for high specific strength and good corrosion resistance. But the poor laser formability of aluminum alloy restricts its application. There are problems such as limited processable materials, immature process conditions and metallurgical defects on SLM processing aluminum alloys. Some efforts have been made to solve the above problems. This paper discusses the current research status both related to the scientific understanding and technology applications. The paper begins with a brief introduction of basic concepts of aluminum alloys and technology characterization of laser selective melting. In addition, solidification theory of SLM process and formation mechanism of metallurgical defects are discussed. Then, the current research status of microstructure, properties and heat treatment of SLM processing aluminum alloys is systematically reviewed respectively. Lastly, a future outlook is given at the end of this review paper.

关键词： Selective laser melting Aluminum alloy Metallurgical defects Mechanical properties Heat treatment Developing trend

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Probabilistic analysis for the response of nonlinear base isolation system under the ground excitation induced by high dam flood discharge

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Earthquake Engineering and Engineering Vibration 2017年第4期16卷 841-857页

作者： Liang Chao zhang jinliang Lian Jijian Liu Fang Li Xinyao State Key Laboratory of Hydraulic Engineering Simulation and Safety Tianjin UniversityTianjin 300072China School of Civil Engineering Tianjin UniversityTianjin 300072China Yellow River Engineering Consulting Co. Ltd.Zhengzhou 450004Henan ProvinceChina

According to theoretical analysis, a general characteristic of the ground vibration induced by high dam flood discharge is that the dominant frequency ranges over several narrow frequency bands, which is verified by observations from the Xiangjiaba Hydropower Station. Nonlinear base isolation is used to reduce the structure vibration under ground excitation and the advantage of the isolation application is that the low-frequency resonance problem does not need to be considered due to its excitation characteristics, which significantly facilitate the isolation design. In order to obtain the response probabilistic distribution of a nonlinear system, the state space split technique is modified. As only a few degrees of freedom are subjected to the random noise, the probabilistic distribution of the response without involving stochastic excitation is represented by the δ function. Then, the sampling property of the δ function is employed to reduce the dimension of the Fokker-Planck-Kolmogorov （FPK） equation and the low-dimensional FPK equation is solvable with existing methods. Numerical results indicate that the proposed approach is effective and accurate. Moreover, the response probabilistic distributions are more reasonable and scientific than the peak responses calculated by conventional time and frequency domain methods.

关键词： ground vibration high dam flood discharge structural response nonlinear base isolation system probabilisticanalysis

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New organic scintillation fiber detector for the measurement of intense pulsed fission neutron

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Science China(Technological Sciences) 2012年第1期55卷 43-47页

作者： CHEN Liang OUYANG XiaoPing zhang ZhongBing LIU jinliang zhang XianPeng Northwest Institute of Nuclear Technology Xi＇an 710024 China

To measure the pulsed neutron of a pulsed fission source, an organic scintillation fiber （OSF） detector with separation structure has been designed. The proposed detector employs UV optical fibers as the light guide, and the sensitive region of the detector is composed of a linear array of OSFs, which are individually connected to the optical fibers. The other end of the light guide is coupled to a photomultiplier tube. The key properties of the device including the energy response, time response, neutron sensitivity, and radiation effect of the optical fiber were studied. The detector has a relatively high n/γ sensitivity ratio, which increases as the diameter of the OSF decreases, and ratios greater than 10 could be achieved when the diameter of the OSF is less than 0.3 nun. The sensitivity of the detector to neutrons ranges from 10-14 to 10-20 C cm2/n, and has a response time of 3 ns （FWHM）. The proposed detector is also highly flexible. For instance, the probe can be set close to the source, while the PMT can be placed far away from radiation, allowing easy shielding. Due to these characteristics, pulsed fission neutrons in the vicinity of the source can be accurately measured.

关键词： organic scintillation fiber pulsed neutron detection n/γ sensitivity ratio energy response UV optical fiber

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Astronomical forcing and sedimentary noise modeling of lake-level changes in the Middle Eocene Chezhen Sag,Bohai Bay Basin,eastern China

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Frontiers of Earth Science 2024年第2期18卷 446-459页

作者： Xuwei LUAN jinliang zhang Na LI Tao CHEN Long SUN Xuecai zhang Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China College of Geosciences China University of Petroleum(Beijing)Beijing 102249China Management Center of Oil and Gas Exploration Sinopec Shengli OilfieldDongying 257000China

The accurate determination of geological age is a key to understanding the history and process of paleolake evolution and oil and gas exploration in continental lake ***,improving the accuracy of geological age has always been a difficult scientific problem.A 609-m-thick,continuous lacustrine mudstone and sandstone succession in Chezhen Sag(eastern China)provides an ideal middle Eocene sedimentary record for establishing a high-resolution stratigraphic chronology *** on spectrum analysis and sliding window spectrum analysis of the natural gamma(GR)logging data of well Che 271(C271)in Chezhen Sag,the periods of 405 kyr and 40.1 kyr were filtered by a Gaussian bandpass filter,and a“floating”astrochronological time scale(ATS)was *** total number of 405 kyr eccentricity cycles were 13.6 and 40.1 kyr obliquity cycles were 138 which recorded from the upper member 4(Es4U)to the member 3(Es3)of the Eocene Shahejie Formation,and the depositional duration was 5.53 *** Coefficient(COCO)analysis and evolutionary Correlation Coefficient(eCoCo)analysis found that the optimal sedimentary rate of different *** noise simulation revealed the history of paleolake water changes in the Middle Eocene in the Chezhen Sag,according to which four sequences are *** study shows that the lake level change of Chezhen Sag in the middle Eocene shows prominent 1.2 Myr cycles and an antiphase well-coupled relationship with obliquity ***,we propose a model to explain the relationship between the orbital cycle and lake level change in the continental lake *** the obliquity of the earth increases,the middle and high latitudes of the earth will be closer to the sun,the direct sunlight will be higher,and the meridional sunshine will increase,thus accelerating the evaporation process of lake basin *** the seasonal changes are obvious(maximum period of 1.2 Myr ultra-long obliquity),this effect is more signific

关键词： Chezhen Sag cyclostratigraphy astrochronological time scale sedimentary noise

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