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| 1 | Spatial-temporal coupling between high-quality source rocks and reservoirs for tight sandstone oil and gas accumulations in the Songliao Basin, China显示文摘The spatial-temporal relationship between high-quality source rocks and reservoirs is a key factor when evaluating the formation,occurrence,and prospectivity of tight oil and gas reservoirs.In this study,we analyze the fundamental oil and gas accumulation processes occurring in the Songliao Basin,contrasting tight oil sand reservoirs in the south with tight gas sand reservoirs in the north.This is done using geochemical data,constant-rate and conventional mercury injection experiments,and fluid inclusion analyses.Our results demonstrate that as far as fluid mobility is concerned,the expulsion center coincides with the overpressure zone,and its boundary limits the occurrence of tight oil and gas accumulations.In addition,the lower permeability limit of high-quality reservoirs,controlled by pore-throat structures,is 0.1×10^-3μm^2 in the fourth member of the Lower Cretaceous Quantou Formation(K1q^4)in the southern Songliao Basin,and 0.05×10^-3μm^2 in the Lower Cretaceous Shahezi Formation(K1sh)in the northern Songliao Basin.Furthermore,the results indicate that the formation of tight oil and gas reservoirs requires the densification of reservoirs prior to the main phase of hydrocarbon expulsion from the source rocks.Reservoir“sweet spots”develop at the intersection of high-quality source rocks(with high pore pressure)and reservoirs(with high permeability). | Laixing Cai Guolin Xiao Shuangfang Lu Jiao Wang Zhiqiang Wu | 2019 | International Journal of Mining Science and Technology2019,29,3: | 6 |
| 2 | Early Identification of the Jiangdingya Landslide of Zhouqu Based on SBAS-InSAR Technology显示文摘SBAS-InSAR technology is characterized by the advantages of reducing the influence of terrain-simulation error,time-space decorrelation,atmospheric error,thereby improving the reliability of surface-deformation monitoring.This paper studies the early landslide identification method based on SBAS-InSAR technology.Selecting the Jiangdingya landslide area in Zhouqu County,Gansu Province as the research area,84 ascendingorbit Sentinel-1A SAR images from 2015 to 2019 are collected.In addition,using SBAS-InSAR technology,the rate and time-series results of surface deformation of the landslide area in Jiangdingya during this period are extracted,and potential landslides are identified.The results show that the early landslide identification method based on SBAS-InSAR technology is highly feasible and is a better tool for identifying potential landslides in large areas. | YU Haihua CAI Guolin GAN Quan SHEN Dong | 2020 | Earthquake Research in China2020,34,4: | 4 |
| 3 | New insights into marine hydrocarbon geological conditions in the South Yellow Sea Basin:evidence from borehole CSDP-2显示文摘The South Yellow Sea Basin(SYSB) has multiple sets of proven source rocks and good hydrocarbon prospects,but no industrial oil and gas has been explored at present.To solve this puzzle for petroleum geologists,we systematically investigated the marine hydrocarbon geological conditions based on cores and testing data from borehole CSDP-2,the first exploration well with continuous coring in SYSB.The qualities of source rocks are evaluated in detail according to organic matter abundance,type,and maturity.The reservoir characterization mainly includes porosity,permeability,and reservoir space.Displacement pressure test and stratum thickness are the main foundations for defining the caprocks.Then,the oil-source rock correlation in the Permian and stratum model are analyzed to determine the favorable source-reservoir-caprock assemblages.The results show that three sets of effective source rocks(the Lower Triassic,Upper Permian,and Lower Permian),two sets of tight sandstone re servoirs(the Upper Permian and Lower Silurian-Upper Devonian),and two sets of caprocks(the Lower Triassic and Carboniferous) combine to constitute the hydrocarbon reservoir-forming as se mblages of 'lower-ge neration and upper-accumlation' and 'self-generation and self-accumlation',thus laying a solid foundation for promising petroleum prospects.The three sets of marine source rocks are characterized by successive generation and expulsion stages,which guarantees multistage hydrocarbon accumulation.Another three sets of continental source rocks distributed across the Middle Jurassic,Upper Cretaceous,and Paleogene depression areas,especially in the Northern Depression,may supplement some hydrocarbons for the Central Uplift through faults and the Indosinian unconformity.The favorable Permian exploration strata have been identified in the Central Uplift of SYSB.First,the Lower Permian and Upper Permian source rocks with high organic matter abundance and high thermal maturity supply sufficient hydrocarbons.Secondly,the interbedding relationship between the source rocks and sandstones in the Upper Permian strata ensures that hydrocarbons have been migrated into the nearby Upper Permian sandstones,reflecting near-source hydrocarbon accumulation.Finally,the good sealing property of the Lower Triassic Qinglong Formation caprocks plays an indispensable role in hydrocarbon preservation of the Permian reservoirs.This conclusion is supported by direct oil shows,gas logging anomalous layers,and hydrocarbon-bearing fluid inclusions. | CAI Laixing XIAO Guolin ZENG Zhigang ZHANG Xunhua GUO Xingwei WANG Shuping | 2020 | Journal of Oceanology and Limnology2020,38,4: | 3 |
| 4 | Identification and expression analysis of bovine ANGPTL gene family显示文摘Encoded by seven genes, angiopoietin-like (ANGPTL) family members structurally similar to the angiogenic regulatingfactor angiopoietin are known to possess biological activities in angiogenesis and metabolism. Here we reports for the firsttime the identification and expression analysis of all the seven members of bovine ANGPTL gene family, which were designatedbANCPTL1 to bANGPTL7 in order. The seven bANGPTL genes consist of 4-9 exons, span 3800-43000 bp and are located ondifferent chromosomes. The deduced amino acid sequences of the members all possess an N-terminal coiled-coil domain and aC-terminal fibrinogen-like domain, both characteristics of angiopoietins. Phylogenetic analysis showed mat the 32 identifiedANGPTL homologs from 9 species could be classified into two major groups. Real-time quantitative PCR (Q-PCR) analysis revealedthat the bANGPTL family members have different expression patterns. This study will be helpful for investigation on thebiological role of the bANGPTL family in this economically important species. Furthermore, it provides an insight into the molecularevolution of the emerging ANGPTL family . | Zhengbing GUAN Guolin CAI Junyong SUN Jian LU | 2010 | Current Zoology2010,56,4: | 2 |
| 5 | Ball milling pretreatment of corn straw and Pediococcus acidilactici fermentation for non‑ruminant diet显示文摘A new strategy was proposed to improve the utilization rate of corn straw by making non-ruminant feed products.The corn straw was ball milled,and the crushed straw was subjected to solid-state fermentation.After ball milling,the particle size of corn straw decreased signifcantly from 4.85±0.07 cm to 10–100μm,the content of neutral detergent fber and acid detergent fber decreased by 1.3%and 3.5%,respectively,and the total soluble sugar content increased by 16.2 mg/g.At the same time,the straw treated by ball milling as substrate could promote the rapid growth of Pediococcus acidilactici R30,the increase of organic acid production and further improvement of other nutrients during solid-state fermentation.In conclusion,the fermented straw products after ball milling could signifcantly improve the performance of pig feed in terms of digestibility and nutritional value,and better meet the feed needs of non-ruminant animals while saving resources. | Dianhui Wu Wenzhe Li Beibei Chu Lulu Wang Xiaomin Li Guolin Cai Jian Lu | 2022 | Systems Microbiology and Biomanufacturing2022,2,2: | 1 |
| 6 | Chemical composition and antimicrobial activity of the essential oil of Scutellaria barbata显示文摘 | Jianqing Yu Jiachuan Lei Huaidong Yu Xuan Cai Guolin Zou | 2004 | Phytochemistry2004,,7: | 1 |
| 7 | Chemical composition and antimicrobial activity of the essential oil of Cacalia tangutica (Maxim.) Hand.-Mazz显示文摘Essential oil of the subterranean part of Cacalia tangutica(Maxim.)Hand.-Mazz was analyzed by gas chromatography(GC)-mass spectrum(MS)technique in two different capillary columns of different polarities.Thirty-one components were identified in the oil and the main compounds were a-zingiberene(13.49%),germacrene D(10.76%),α-pinene(8.54%),caryophyllene(Z-)(6.36%),linalool(6.16%),β-myrcene(4.89%),β-ocimene(Z-)(4.40%)and ocimenone(Z-)(3.58%).The antimicrobial activity of the oil was evaluated against 2 fungi and 12 bacteria including 6 clinically isolated strains using the agar disc diffusion and broth microdilution methods.The results show that the oil presented a broad antimicrobial spectrum and had better antimicrobial activity against yeast and gram-positive bacteria.The minimum inhibitory concentration values were 0.16–5.00 g/L and minimum bactericidal concentration values were 0.16–5.00 g/L. | Yang YANG Shunying ZHU Xiaoqiang CAI Lifei TANG Deqing LIU Jinghua HUANG Guolin ZOU | 2008 | Frontiers in Biology2008,3,4: | 0 |