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Journal of Ocean University of China 2020年第4期19卷 818-826页

作者： WANG Dunfan JIN Chong JIN Aimin lou zhanghua Marine Geology&Resources Ocean CollegeZhejiang UniversityZhoushan 316021China Deep Sea Science Division Institute of Deep Sea Science and EngineeringChinese Academy of SciencesSanya 572000China Zhejiang Institute of Geology and Mineral Rescource Hangzhou 310007China

To characterize the Fe(III)-reducing bacteria,enrichment cultures were initiated by inoculating deep-sea sediment from the South China Sea(SCS)into the media with hydrous ferric oxide(HFO)as the sole electron *** indicated by Meta 16S rDNA Amplicon Sequencing,the microorganisms related to Fe(III)-reduction in the enrichment cultures were mainly Shewanella and Enterobacter.A new facultative Fe(III)-reducing bacterium was obtained and identified as Enterobacter ***-1 based on its 16S rRNA gene sequence and physiological *** ***-1 was not only a mesophilic bacterium capable of reducing HFO with a wide range of salinity(4,34,40,50 and 60 g L−1)efficiently,but also a piezotolerant bacterium that can proceed Fe(III)-reduction sustainedly at hydrostatic pressures between 0.1 and 50 MPa using glucose and pyruvate as carbon ***,the geochemical characteristics of deep-sea sediment indicated that the microbial metabolism and iron reduction both remain active in the well-developed Fe(III)-reducing zone where the strain Nan-1 was *** our knowledge,Enterobacter ***-1 could serve as a new applicative Fe(III)-reducing bacterium for future investigation on the iron biogeochemical cycle and diagenetic process of organic matter in the deep-sea environment.

关键词： deep-sea sediment Fe(Ⅲ)-reducing bacteria Meta 16S rDNA Amplicon Sequencing high hydrostatic pressures Enterobacter sp.Nan-1

东濮凹陷北部文留地区沙河街组地层水演化与油气成藏模式

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地球科学 2024年第1期49卷 140-154页

作者：吴宇辰刘一锋金爱民周勇水丘靥徐田武楼章华浙江大学海洋学院浙江舟山316021 中国石化中原油田分公司河南濮阳450012 南京大学地球科学与工程学院江苏南京210033

东濮凹陷北部沙河街组盐岩发育,流体特征受其影响明显,但目前对盐岩发育区的流体特征及其演化过程研究还十分薄弱.以文留地区沙河街组三段、四段为研究对象,采集砂岩储层内流体包裹体样品,对其进行镜下观察、显微测温和激光拉曼分析.结... 详细信息

东濮凹陷北部沙河街组盐岩发育,流体特征受其影响明显,但目前对盐岩发育区的流体特征及其演化过程研究还十分薄弱.以文留地区沙河街组三段、四段为研究对象,采集砂岩储层内流体包裹体样品,对其进行镜下观察、显微测温和激光拉曼分析.结果表明,研究区有3期油气成藏,主要成藏时间为0~8Ma和22~30 Ma.地层水在24~30 Ma呈现局部淡化趋势,24 Ma至今矿化度又逐渐升高.地层水淡化期、油气成藏高峰期、地层压力泄压期三者呈现出高度耦合,并据此建立了流体运移模式.地层水矿化度值的演变反映其运移过程,同时也指示了伴随地层水运移的油气运聚方向.淡化地层水有助于次生孔隙的生成,改善储层物性,而过饱和流体则可能会对储层产生不利影响.

关键词：地层水淡化流体演化流体运移油气成藏沙河街组石油地质

Distribution and Geochemical Characteristics of Fluids in Ordovician Marine Carbonate Reservoirs of the Tahe Oilfield

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Journal of Earth Science 2014年第3期25卷 486-494页

作者： Mei Li zhanghua lou Rong Zhu Aimin Jin Ying Ye Ocean College Zhejiang University

The Ordovician carbonate reservoirs in the Tahe Oilfield are highly heterogeneous, which have undergone multiple superimposed transformations by tectonic activities and karst processes, leading to an extremely complex fluid distribution. The geochemical characteristics of geofluids also display great disparities. Results show that the vertical distribution of oil and gas are continuous, however the oil-water interfaces in different blocks of the Tahe Ordovician Oilfield are numerous. Meteoric water infiltration is regarded as the main reason for the high oil-water interface and high water content to the north of Tahe Oilfield, especially in well blocks S78–S73. The isotopic values of deuterium-oxygen in the groundwater and carbon-oxygen from calcite veins confirm that formation water in Ordovician reservoirs of the Tahe Oilfield was a mix of meteoric water and connate water, and the proportion of meteoric water gradually increases from south to north, while connate water decreases. The Tahe Ordovician reservoirs are characterised by multiple hydrocarbon charges, and the general migrating direction is from southeast to northwest and from east to west. High production could be obtained in the northern area of the Tahe Oilfield since the oil layers are thick and oil is highly saturated. The residual water within the reservoirs is low, and heavy oil is dominant in this area. Only a small amount of pore water has been replaced by oil in the southern Tahe Oilfield, leading to low oil saturation and a high content of residual water. Crude oil is herein mainly of medium-light type. During the process of exploration in this region, acid fracturing reformation is usually required for wells to increase their output; however the yield is still low.

关键词： fluid distribution geochemical characteristics residual water Tahe Oilfield.

Origin and Distribution of Groundwater Chemical Fields of the Oilfield in the Songliao Basin,NE China

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Acta Geologica Sinica(English Edition) 2005年第5期79卷 688-696页

作者： JIN Aimin lou zhanghua ZHU Rong CAI Xiyuan GAO Ruiqi Department of Water Conservancy and Ocean Engineering Zhejiang University Hangzhou Zhejiang 310028 China Petrochemical Corporation Beijing 100029 Exploration Bureau CNPC Beijing 100724

There are many factors affecting the chemical characteristics of groundwater in the forming process of groundwater chemical fields, such as freshening due to meteoric water leaching downwards, freshening due to mudstone compaction and water release, concentration due to infiltration and freshening due to dehydration of clay minerals. As a result, the groundwater chemical fields are characterized by lengthwise stages and planar selectivity. The former arouses vertical chemical zonality of groundwater. Five units could be identified downwards in the Songliao basin：（1） freshening zone due to downward-leaching meteoric water, （2） concentration zone due to evaporation near the ground surface, （3） freshening zone due to mudstone compaction and water release, and concentration zone due to compaction and infiltration, （4） freshening zone due to dehydration of clay minerals, and （5） filtration-concentration zone; whereas the latter determines the planar division of groundwater chemical fields：（1） the freshening area due to meteoric water, asymmetrically on the margin of the basin, （2） the freshening area due to mudstone compaction and water release in the central part of the basin, （3） the leaky area, which is a transitional zone, and （4） leakage-evaporation area, which is a concentration zone. In the direction of centrifugal flows caused by mudstone compaction in the depression area, the mineralization degree, concentrations of Na^＋ and Cl^-, and salinity coefficient （SC） increase, while concentrations of （CO3^2- ＋HCO3^-） and SO4^2-, metamorphism coefficient （MC） and desulfuration coefficient （DSC） decrease. However, all these parameters increase in the direction of gravity-induced centripetal flows.

关键词： Songliao Basin hydrodynamic field groundwater chemical field vertical zonality planar division

An analytical solution to contaminant advection and dispersion through a GCL/AL liner system

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Chinese Science Bulletin 2011年第8期56卷 811-818页

作者： XIE HaiJian lou zhanghua CHEN YunMin JIN AiMin CHEN PeiXiong MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering Zhejiang University Hangzhou 310058 China Institute of Hydrology and Water Resources Engineering Zhejiang University Hangzhou 310058 China Second Institute of Oceanography Hangzhou 310012 China

An one-dimensional model for contaminant advection and dispersion through a GCL/AL liner system was developed to analyze the equivalence between a GCL(geosynthetic clay liner) and a CCL(compacted clay liner).The continuity of contaminant concentration and flux at the interface between the GCL and the underlying attenuation liner(AL) are obeyed in the model,and background concentrations in the soil liner are also *** on the assumption that contaminant transport through a GCL was a steady state process,an analytical solution was *** the leachate head from 0.3 m to 10 m results in a reduction of the breakthrough time of benzene by a factor of *** breakthrough time of benzene increases by a factor of 7.0 when the hydraulic conductivity of GCL decreases by one order of *** breakthrough curves are more sensitive to the hydraulic conductivities of the GCL and AL(attenuation layer) than to the thickness of the *** standard 75 cm CCL can be replaced by a combination of a GCL and a 1.0-4.0 m thickness of *** proposed method can be used for preliminary design of GCL composite liners,assessing the equivalence between GCL and CCL,preliminary design of a remediation method for contaminated soils,and evaluating experimental results.

关键词：污染物浓度解析解扩散对流受污染土壤土工合成材料铝衬垫系统

Sedimentary Environments of the Cangfanggou Groupin Junggar Basin,Xinjiang,in Response to Climate and Tectonic Regime

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Acta Geologica Sinica(English Edition) 2000年第4期74卷 795-806页

作者： lou zhanghua ZHU Rong TANG Zhonghua LIU Zhigang ZHAO Xiafei CHEN Zhongcai Department of Ocean Sciences and Engineering Zhejiang UniversityHangzhou 310028 Xinjiang Petroleum Administration Urümqi 830011 Chengdu College of Science and Technology Chengdu 610059

Detailed studies of petrology, palaeocurrent direction, paiaeogeomorphology and palaeohydrody-namics have been conducted for the Permian-Triassic Cangfanggou Group in the foredeep of the Bogda Mountains in the southeastern Junggar Basin, Xinjiang. Sedimentary environments and fades of alluvial fans and pebbly braided rivers, sandy braided rivers, meandering rivers, low-sinuosity rivers, swamps and fresh-water lakes are recognized in the group. Climate and tectonics of source areas strongly controlled the evolution of the sedimentary environments and facies in the foredeep. The block faulting in the Bogda Mountains increased the ground slope, which led to a drastic increase in the grain size of the sediments. Humid climate, being beneficial to plant growth, would provide protection of channel banks and at the same time weaken chemical weathering in the source area, thus large amounts of clay materials are available for the formation of clay plugs. As a result, stable banks and meandering river belts are formed. Conversely, increasing aridity would strengthen mechanical weathering and reduce the number of clay plugs. Besides, plants would diminish gradually and channels would become more mobile. In this case the decrease of transported clay materials would reduce the stability of the bank and result in a wider and shallower channel. Therefore, humid climate is beneficial to the formation of meandering rivers even if there is strong block faulting in the source areas and the ground slope is very large. As aridity further increases, plants would diminish and vanish at last, the meandering rivers prevalent under humid climate conditions would be transformed to low-sinuosity rivers even if the ground is gentle and the land is tectonically stable. And as the climate became more arid and the source area uplifted intensively to provide more sedimentary materials, low-sinuosity rivers would be transformed to braided ones quickly, and wedge-like sedimentary bodies of the braid

关键词： river panern climate evolution Cangfanggou group Junggar Basin

Distribution of the Ordovician Fluid in the Tahe Oilfield and Dynamic Response of Cave System S48 to Exploitation

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Acta Geologica Sinica(English Edition) 2008年第3期82卷 487-498页

作者： lou zhanghua ZHU Rong YUN Lu RAN Qihua SU Danyang LI Mei Institute of Hydrology and Water Resource Engineering Zhejiang University Hangzhou Zhejiang 310028 Research Centre of Oceanology Zhejiang University Hangzhou Zhejiang 310028 Research Institute of Exploration and Development Northwest Branch Sinopec Urumqi Xinjiang 830011

The Tahe Oilfield is a complex petroleum reservoir of Ordovician carbonate formation and made up of spatially overlapping fracture-cavity units. The oilfield is controlled by a cave system resulting from structure-karst cyclic sedimentation. Due to significant heterogeneity of the reservoir, the distribution of oil and water is complicated. Horizontally, a fresh water zone due to meteoric water can be found in the north part of the Akekule uplift. A marginal freshening zone caused by water released from mudstone compaction is found at the bottom of the southern slope. Located in a crossformational flow discharge zone caused by centripetal and the centrifugal flows, the main part of the Tahe Oilfield, featuring high salinity and concentrations of CI^- and K^＋＋Na^＋, is favorable for accumulation of hydrocarbon. Three types of formation water in the Tahe Ordovician reservoir are identified：（1） residual water at the bottom of the cave after oil and gas displacement, （2） residual water in fractures/pores around the cave after oil and gas displacement, and （3） interlayer water below reservoirs. The cave system is the main reservoir space, which consists of the main cave, branch caves and depressions between caves. Taking Cave System S48 in the Ordovician reservoir as an example, the paper analyzes the fluid distribution and exploitation performance in the cave system. Owing to evaporation of groundwater during cross-formational flow, the central part of the main cave, where oil layers are thick and there is a high degree of displacement, is characterized by high salinity and Br^- concentration. With high potential and a long stable production period, most wells in the central part of the main cave have a long water-free oil production period. Even after water breakthrough, the water content has a slow or stepwise increase and the hydrochemistral characteristics of the produced water in the central part of the main cave are uniform. From the center to the edge of the main

关键词： Tahe Oilfield fracture-cavity unit cave system hydrochemical characteristics of groundwater exploitation performance

Origin, Flow of Formation Water and Hydrocarbon Accumulation in the Zhenwu Area of the North Jiangsu Basin, China

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Acta Geologica Sinica(English Edition) 2013年第3期87卷 819-829页

作者： LI Mei lou zhanghua JIN Aimin ZHU Rong SHANG Changjian YE Ying ZHU Zhenhong Institute of ocean resources Zhejiang University State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of Technology

In order to understand the origin and flow of formation water and to evaluate the hydrocarbon accumulation and preservation conditions, the properties of formation water chemistry and dynamics of the Zhenwu area in the southern Gaoyou Sag, North Jiangsu Basin, China, have been investigated. The results show that Xuzhuang oilfield is infiltrated discontinuously by meteoric water under gravity, which consequently leads to the desalination of formation water. Formation water in the Zhenwu and Caozhuang oilfields is less influenced by meteoric water infiltration, and the origin is interpreted to be connate water. Hydrocarbon migration, accumulation and preservation are closely related to the hydrodynamic field of formation water. Formation water concentrates gradually during the process of centrifugal flow released by mudstone compaction and the centripetal flow of meteoric water infiltration, leading to the high salinity of the central part. The geological conditions of the southern fault-terrace belt are poor for hydrocarbon accumulation and preservation as meteoric water infiltration, leaching and oxidation, while the central part, i.e., northern Zhenwu and Caozhuang oilfields is beneficial for an abundance of hydrocarbon accumulation. Most of the large scale oil-~as fields locate herein.

关键词： formation water chemistry hydrodynamic fluid potential hydrocarbon accumulation South Gaoyou Sag North Jiang Basin

Upper Paleozoic Marine Shale Characteristics and Exploration Prospects in the Northwestern Guizhong Depression,South China

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Journal of Ocean University of China 2018年第4期17卷 773-790页

作者： ZHU Zhenhong YAO Genshun lou zhanghua JIN Aimin ZHU Rong JIN Chong CHEN Chao Ocean College Zhejiang UniversityZhoushan 310058China Hangzhou Institute of Petroleum Geology Hangzhou 310023China Zhejiang Institute of Geology and Mineral Rescource Hangzhou 310007China

Multiple sets of organic-rich shales developed in the Upper Paleozoic of the northwestern Guizhong Depression in South China. However, the exploration of these shales is presently at a relatively immature stage. The Upper Paleozoic shales in the northwestern Guizhong Depression, including the Middle Devonian Luofu shale, the Nabiao shale, and the Lower Carboniferous Yanguan shale, were investigated in this study. Mineral composition analysis, organic matter analysis(including total organic carbon(TOC) content, maceral of kerogen and the vitrinite reflection(Ro)), pore characteristic analysis(including porosity and permeability, pore type identification by SEM, and pore size distribution by nitrogen sorption), methane isothermal sorption test were conducted, and the distribution and thickness of the shales were determined, Then the characteristics of the two target shales were illustrated and compared. The results show that the Upper Paleozoic shales have favorable organic matter conditions(mainly moderate to high TOC content, type Ⅰ and Ⅱ_1 kerogen and high to over maturity), good fracability potential(brittleness index(BI) > 40%), multiple pore types, stable distribution and effective thickness, and good methane sorption capacity. Therefore, the Upper Paleozoic shales in the northern Guizhong Depression have good shale gas potential and exploration prospects. Moreover, the average TOC content, average BI, thickness of the organic-rich shale(TOC > 2.0 wt%) and the shale gas resources of the Middle Devonian shales are better than those of the Lower Carboniferous shale. The Middle Devonian shales have better shale gas potential and exploration prospects than the Lower Carboniferous shales.

关键词： shale gas shale characteristics exploration prospects Guizhong Depression South China

Trends of carbon and nutrient accumulation through time in the Andong salt marsh,Hangzhou Bay,China

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Journal of Oceanology and Limnology 2023年第6期41卷 2134-2145页

作者： Pei Sun LOH Aimin JIN zhanghua lou Xuegang CHEN Shuangyan HE Chen-Tung Arthur CHEN Stephanie PARKER Jianxiong HU Hongwei YUAN Longxiu CHENG Department of Marine Sciences Ocean CollegeZhejiang UniversityZhoushan 316021China Department of Oceanography National Sun Yat-sen UniversityKaohsiung 804China

Salt marshes are important carbon and nutrient sinks that are threatened by climate changes and human *** this study,the accumulation rates of sedimentary total organic carbon(TOC),total nitrogen(TN),and total phosphorus(TP)from two cores in the Andong salt marsh,Hangzhou Bay,were investigated to determine whether TOC,TN,and TP show increasing or decreasing trends toward the *** TOC accumulation rates at the relatively lower marsh were lower during 1990-1996(1.63-2.37 g/(cm^(2)·a))than 1997-2014(1.15-4.30 g/(cm^(2)·a)).The TN accumulation rates increased from 1990(0.14 g/(cm^(2)·a))toward 2012(0.40 g/(cm^(2)·a)),then decreased toward 2014(0.16 g/(cm^(2)·a)).The TP accumulation rates were lower during 1990-1999(0.10-0.21 mg/(cm^(2)·a)),and decreased from 2000(0.32 mg/(cm^(2)·a))toward 2014(0.15 mg/(cm^(2)·a)).The TOC accumulation rates along the relatively upper marsh during 1982-1992(1.18-3.25 g/(cm^(2)·a))were lower than during 1998-2010(2.30-4.20 g/(cm^(2)·a)),and then decreased toward 2015(2.15 g/(cm^(2)·a)).TN increased from 1982(0.18 g/(cm^(2)·a))to 2005(0.41 g/(cm^(2)·a)),then decreased toward 2015(0.22 g/(cm^(2)·a)).TP accumulation rates fluctuated within a narrow range during 1982-1997(0.21-0.41 mg/(cm^(2)·a)),increased from 1998(0.50 mg/(cm^(2)·a))to 2004(0.87 mg/(cm^(2)·a)),then decreased to 2015(0.38 mg/(cm^(2)·a)).Thus,increases in accumulation rates of TOC,TN,and TP from the 1980s to 1990s indicates that the marsh likely served as carbon and nutrient sinks,then the rates decreased during 2000-2015 due probably to the reduced sediment inputs from rivers and intensified sea level rise.

关键词： wetland climate change anthropogenic activity marsh degradation