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Recognition of Milankovitch Cycles in the Natural Gamma—Ray Logging of Upper Cretaceous Terrestrial Strata in the Songliao Basin

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Acta Geologica Sinica(English Edition) 2007年第6期81卷 996-1001页

作者： WU Huaichun ZHANG Shihong SUI Suwen HUANG Qinghua State Key Laboratory of Geological Processes and Mineral Resources ＆ Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education China University of Geosciences Beijing 100083 School of Marine Science China University of Geosciences Beijing 10008 exploration and development Research institute of daqing Oil Field Corporation Ltd. Daqing Heilongjiang 163712

Spectrogram analysis of seven natural gamma-ray logging of Member 1 of the Qingshankou Formation （K2qn^1） and Member 1 and 2 of the Nenjiang Formation （K2n^1-2） of Late Cretaceous age in the Songliao Basin reveals sedimentary cyclicities controlled by Milankovitch climate periodicities. The recognition of Milankovitch cycles allows estimation of an average accumulation rate of ～7.55- 8.62 cm/ka for the K2qn^1 sections, and ～6.69-10.16 cm/ka for the K2n^1-2 sections. Two marine transgression events occurred during the deposition of K2qn^1 and K2n^1-2 and their ages are at ～0.74- 1.10 Ma and ～2.38-4.84 Ma, respectively. Identification of Milankoviteh cycles from fine-grained deep lake sedimentary rocks in the Songliao Basin may provide great potential for high-resolution stratigraphic subdivisions and correlations.

关键词： Songliao Basin gamma-ray logging Milankovitch cycles marine transgression events

Climate characteristics of the eastern Mongolian Plateau,China during the early Early Cretaceous(145-132 Ma):Palynological evidence from the Tongbomiao Formation in Well Hong-6,Hailar Basin

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China Geology 2022年第3期5卷 439-456页

作者： Yan Zhang Yun-fei Xue Chun-yang Bu Ti Li Xin Zhang Yu-dong Jin Yue-wu Sun College of Earth Sciences Jilin UniversityChangchun 130061China Geological Laboratory Exploration and Development Research Institute of Daqing Oilfield Company Ltd.Daqing 163712China Research Center of Paleontology and Stratigraphy Jilin UniversityChangchun 130026China

This study identified two palynological assemblages,namely Bayanhuasporites-Cycadopites-Protoconiferus and Cicatricosisporites-Cedripites-Perinopollenites,in the Tongbomiao Formation in the Hongqi Sag in the Hailar Basin,Inner Mongolia,China for the first *** former is distributed in the lower part of the Tongbomiao Formation and is characterized by abundant gymnosperm pollen and diverse fern *** them,the gymnosperm pollen is dominated by Paleoconifer(4.98%-31.62%)and Cycadopite(8.55%-25.23%)pollen grains and also includes other pollen grains such as Classopollis,Parcisporites,Erlianpollis,Callialasporites,and *** fern spores in the former palynological assemblage contain Bayanhuasporite(0-8.96%),Granulatisporites(0.93%-6.97%),and some important Cretaceous genera,such as Cicatricosisporites,Concavissimisporites,Densoisporites,Hsuisporites,Foraminisporis,and *** Cicatricosisporites-Cedripites-Perinopollenites palynological assemblage is distributed in the upper part of the Tongbomiao ***(77.30%),Pinaceae(31.9%),and Paleoconiferus(19.02%)pollen predominate this palynological assemblage,and Quadraeculina,Erlianpollis,and Jiaohepollis pollen are also common in this *** fern spores in this palynological assemblage include abundant Cicatricosisporites(4.29%).Besides,Concavissimisporites,Aequitriradites,and Leptolepidites are also common in this palynological *** angiosperm pollen has been found in both palynological *** identification of both palynological assemblages provides important evidence for the biostratigraphic correlation between the Hailar Basin and its adjacent *** also enables the reconstructions of the Berriasian-Valanginian(Early Cretaceous)vegetation and the paleoclimate on the eastern Mongolian Plateau during 141-132 *** vegetation reconstructed on the palynological data of the represented by Hailar Basin in eastern Mongolian Plateau(141.6-141.4 Ma),form co

关键词： Tongbomiao Formation Palynological Assemblages Gymnosperm Berriasian-Valanginian Palaeovegetation Palaeoclimate Hailar Basin Mongolian Plateau China

Effect of absorption boundary layer on nonlinear flow in low permeability porous media

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Journal of Central South University 2011年第4期18卷 1299-1303页

作者：王学武杨正明齐亚东黄延章 institute of Porous Flow and Fluid Mechanics Chinese Academy of Sciences Langfang Branch Petro China Exploration and Development Research Institute

Taking low permeability cores of daqing oilfield for example,the flow characteristics at low velocity were studied with the self-designed micro-flux measuring *** the throat distribution and capillary model,the thickness of fluid boundary layer under different pressure gradients was calculated,and the mechanism and influencing factors of nonlinear percolation were *** results show that the percolation curve of ultra-low rocks is nonlinear,and apparent permeability is not a constant which increases with pressure *** absorption boundary layer decreases with the increase of pressure gradient,and changes significantly especially in low pressure gradient,which is the essence of nonlinear *** absorption boundary layer is also found to be impacted by the surface property of rocks.

关键词： low permeability reservoirs percolation absorption boundary layer capillary model

Studying surface structure in desert areas using multiple kinds of surface wave data

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Applied Geophysics 2007年第1期4卷 1-7页

作者： Cheng Suo Gang Tian Zhanjie Shi College of Geo-exploration Science ＆ Technology Jilin University Changchun 130026 China Department of Earth Sciences Zhejiang University Hangzhou 310027 China exploration and development Research institute of daqing Oil Daqing 163712 China.

Shallow surface wave methods are mostly used for investigation of the surface velocity structure in environmental and engineering geophysics in non-desert areas. For the special geological features of the Takelamagan Desert area, we use the multi-channel analysis of surface wave （MASW） method to process multi-channel shallow surface wave records to determine the near surface velocity structure in the desert area. We also process, analyze, and compare the surface waves in many-trace records extracted from the oil exploration shot gathers in the area. We show that the MASW method can determine detailed shallow velocity structure in desert areas and the many-trace records can be used to get detailed deep geological structure. The combination of the two different datasets can obtain the exact velocity structure upper 60 m depth in the survey area.

关键词： desert area near surface structure shot records multi-channel analysis of surface wave.

Quantitative evaluation model of shale oil adsorption:A case study of the first member of Cretaceous Qingshankou Formation in northern Songliao Basin,NE China

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Petroleum exploration and development 2023年第5期50卷 1137-1150页

作者： LI Jinbu WANG Min LU Shuangfang LIU Liang LI Ming ZHANG Yuchen WANG Xin ZHAO Xinbin ZHANG Jinyou ZHAO Ying National Key Laboratory of Deep Oil&Gas China University of Petroleum(East China)Qingdao 266580China Guangzhou institute of Geochemistry Chinese Academy of SciencesGuangzhou 510640China Sanya Offshore Oil&Gas Research institute Northeast Petroleum UniversitySanya572025China exploration and development Research institute of PetroChina daqing Oilfield Company Daqing 163712China

A quantitative evaluation model that integrates kerogen adsorption and clay pore adsorption of shale oil was proposed,and the evaluation charts of adsorption-swelling capacity of kerogen(Mk)and adsorbed oil capacity of clay minerals(Mc)were established,taking the 1st member of Cretaceous Qingshankou Formation in the northern Songliao Basin as an *** model and charts were derived from swelling oil experiments performed on naturally evolved kerogens and adsorbed oil experiments on clays(separated from shale core samples).They were constructed on the basis of clarifying the control law of kerogen maturity evolution on its adsorption-swelling capacity,and considering the effect of both the clay pore surface area that occupied by adsorbed oil and formation *** results are obtained in four aspects:(1)For the Qing 1 Member shale,with the increase of maturity,Mk *** Ro of 0.83%–1.65%,Mk is about 50–250 mg/g.(2)The clay in shale adsorbs *** is 0.63 mg/m^(2),and about 15%of the clay pore surface is occupied by adsorbed oil.(3)In the low to medium maturity stages,the shale oil adsorption is controlled by organic *** Ro>1.3%,the shale oil adsorption capacity is contributed by clay pores.(4)The oil adsorption capacity evaluated on the surface at room temperature is 8%–22%(avg.15%)higher than that is held in the *** proposed evaluation model reveals the occurrence mechanisms of shale oils with different maturities,and provides a new insight for estimating the reserves of shale oil under formation temperature conditions.

关键词： shale oil adsorbed oil occurrence state mobility Cretaceous Qingshankou Formation Evaluation model Songliao Basin

Distribution characteristics and oil mobility thresholds in lacustrine shale reservoir:Insights from N_(2)adsorption experiments on samples prior to and following hydrocarbon extraction

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Petroleum Science 2022年第2期19卷 486-497页

作者： Long-Hui Bai Bo Liu Yi-Jing Du Bo-Yang Wang Shan-Si Tian Liu Wang Zhi-Qiang Xue Accumulation and development of Unconventional Oil and Gas State Key Laboratory Cultivation BaseNortheast Petroleum UniversityDaqingHeilongjiang 163318China Hubei Key Laboratory of Petroleum Geochemistry and Environment Yangtze UniversityWuhanHubei 430100China Research institute of Petroleum exploration&development Beijing100083China No.1 institute of Geological and Mineral Resources Survey of Henan LuoyangHenan 471000China

The pore structure and oil content of shales have an important influence on the oil mobility and *** this study,the lacustrine shale samples from the Qingshankou Formation(Q1)of Songliao Basin were ***,pyrolysis,XRD and nitrogen adsorption were performed on the original and extracted shale *** the influence of mineral composition and organic matter(OM)on the development of nano-scale pore,the oil phase states and mobility were *** Q1 shale samples can be sub-divided into three types according to the isotherm *** A samples are characterized by high kerogen content,with oil mainly existing in the free phase *** B samples are characterized by medium kerogen content,oil mainly exists in the absorbed phase *** C samples are characterized by low kerogen content,with trace oil found in the absorbed phase ***-scale organic pores are well developed in the Q1 *** is primarily found in the pore spaces with diameters less than 10 nm,this being the pore size threshold for mobile shale *** TOC>2.0 wt%and EOM>1.0 wt%,Q1 Formation shale oil mobility is high,resulting in prospective drilling targets.

关键词： Shale oil mobility Oil phase state Extraction Nitrogen adsorption

Study of action mechanisms and properties of Cr^(3+) cross-linked polymer solution with high salinity

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Petroleum Science 2012年第1期9卷 75-81页

作者： Lu Xiangguo Liu Jinxiang Wang Rongjian Liu Yigang Zhang Song Key Laboratory of Enhanced Oil Recovery of the Ministry of Education College of Petroleum EngineeringNortheast Petroleum UniversityDaqingHeilongjiang 163318China Tianjin Company of CNOOC Ltd. Tianjin 300450China PetroChina Research institute of Petroleum exploration and development Beijing 100083China

Performance characteristics of partially hydrolyzed polyacrylamide （HPAM） and cross- linked polymer （CLP, Cr^3＋ as the cross linker） solutions have been investigated. A Brookfield viscometer, rheometer, dynamic light scattering system, and core flow device have been used to measure the viscosity, viscoelasticity, polymer coil dimensions, molecular configuration, flow characteristics, and profile modification. The results show that, under conditions of high salinity and low HPAM and Cr^3＋ concentrations, cross-linking mainly occurred between different chains of the same HPAM molecule in the presence of Cr^3＋, and a cross-linked polymer （CLP） system with a local network structure was formed. Compared with an HPAM solution of the same concentration, the apparent viscosity of the CLP solution increased slightly or remained almost unchanged, but its viscoelasticity （namely storage modulus, loss modulus, and first normal stress difference） increased, and the resistance coefficient and residual resistance coefficient increased significantly. This indicates that the CLP solution exhibits a strong capability to divert the sequentially injected polymer flood from high-permeability zones to low- permeability zones in a reservoir. Under the same HPAM concentration conditions, the dimensions of polymer coils in the CLP solution increased slightly compared with the dimensions of polymer coils in HPAM solution, which were smaller than the rock pores, indicating that the cross-linked polymer solution was well adapted to reservoir rocks. Core flood experiments show that at the same cost of reagent, the oil recovery by CLP injection （HPAM-1, Cr^3＋ as the cross linker） is 3.1% to 5.2% higher than that by HPAM- 2 injection.

关键词： Cross-linked polymer solution apparent viscosity viscoelasticity polymer coil dimension,molecular configuration flow characteristics profile modification

Rock Physical Experimental Research in Tanan Volcanic Rock Reservoir

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Journal of Applied Mathematics and Physics 2014年第6期2卷 284-295页

作者： Lailin Li Haibo Zhao Xuehui Han Oil exploration and development Research institute of daqing Daqing China China University of Petroleum (East China) Qingdao China

Under the condition of simulated formation temperature and pressure, the compression and shear wave velocity of the tuffaceous conglomerates and rock-fragment sandstones of the reservoirs in K1t, k1n group of Cretaceous system in Tanan are measured. The effects of lithology, mineral content, density, porosity, shale content, and water saturation on the acoustic velocity of the athrogenic rock are studied. Within the limits of our observation, some rules are found: (1) the velocity of the fine tuffaceous conglomerates is remarkably greater than that of the tuffaceous rock-fragment sandstones with good physical property;(2) the compression velocity increases with fragment content, and decreases with quartz and feldspar content in the mud;(3) the compression velocity increases with density, especially, in tuffaceous rock-fragment sandstones, the velocity keeps a good relation with density in form of power function;(4) compression and shear wave velocity decreases with porosity and shale content, velocity of the tuffaceous rock-fragment sandstones keeps a good relation with porosity and shale content in form of negative linear function, but effects of shale content is only 1/5 to 1/10 of that of the porosity, hence can be neglected;(5) with porosity increases, compression wave velocity is relatively sensitive to fluid alternation, and the rang in which velocity varies keeps positive correlation with porosity. The result provides a foundation for the research of seismic and logging data evaluation approaches in athrogenic rock reservoirs, Haita basin.

关键词： Tuffaceous Rock-Fragment Sandstones Acoustic Velocity Porosity Shale Content Density Water Saturation

Investigation of Electrical Parameters of Fresh Water and Produced Mixed Injection in High-Salinity Reservoirs

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Fluid Dynamics & Materials Processing 2023年第10期19卷 2695-2706页

作者： Jun Li Guofeng Cheng Hongwei Xiao Xiang Li Lizhi Wang Hui Xu Yu Wang Nannan Liu Shangping Chen Xing Shi PetroChina Research institute of Petroleum exploration&development Beijing100083China Changqing Oilfield No.5 Oil Production Plant PetroChinaXi’an710000China exploration and development Research institute of daqing Oilfield Co. Ltd.Daqing163712China Key Laboratory of Shallow Geothermal Energy Ministry of Natural Resources of the People’s Republic of ChinaBeijing100195China Jiangsu Key Laboratory of Oil-Gas Storage and Transportation Technology School of Petroleum and Natural Gas EngineeringChangzhou UniversityChangzhou213164China Sinopec International Petroleum exploration and Production Corporation Beijing100029China

Assuming a reservoir with a typical salt-lake background in the Qaidam Basin as a testbed,in this study the var-iation law of the rock electrical parameters has been determined through water displacement experiments with different *** made evident by the results,the saturation index increases with the degree of water *** the salinity of the injected water is lower than 80000 ppm,the resistivity of the rock sampleﬁrst decreases,then it remains almost constant in an intermediate stage,andﬁnally it grows,thereby giving rise to a‘U’proﬁle *** the salinity decreases,the water saturation corresponding to the inﬂection point of the resistivity becomes lower,thereby leading to a wider‘U’type range and a higher terminal *** dif-ferent samples,higher initial resistivity of the sample in the oil-bearing state,and higher resistivity after low-sali-nity water washing are obtained when a thicker lithology is considered.

关键词： High salinity reservoir mixed injection saturation index resistivity electrical parameters