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Control of paleogeographic pattern on sedimentary differentiation of evaporite-carbonate symbiotic system:A case study of the sixth sub-member of Ordovician Majiagou Formation M5 Member in central-eastern Ordos Basin,NW China

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Petroleum Exploration and Development 2022年第4期49卷 837-850页

作者： ZHONG Shoukang TAN Xiucheng HU Guang NIE Wancai YANG Mengying ZHANG Daofeng ZHENG Jianfeng XU Jie DONG Guodong XIAO Di LU Zixing State Key Laboratory of oil and gas Reservoir Geology and Exploitation Chengdu 610500China Southwest Petroleum University division of Key Laboratory of Carbonate Reservoirs CNPCChengdu 610500China Natural gas Project Department Changqing Oilfield Company of PetroChinaXi'an 710016China Research Institute of Exploration and Development Changqing Oilfield Company of PetroChinaXi'an 710016China PetroChina Hangzhou Research Insitute of Geology Hangzhou 310023China

The relationship between paleogeographic pattern and sedimentary differentiation of evaporite-carbonate symbiotic system is examined based on logging,core and thin section data,by taking the sixth sub-member of fifth member of Ordovician Majiagou Formation(M56)in the central-eastern Ordos Basin as an example.(1)Seven sub-geomorphic units(Taolimiao west low,Taolimiao underwater high,Taolimiao east low,Hengshan high,East salt low,North slope and Southwest slope)developed in the study area.(2)The“three lows”from west to east developed dolomitic restricted lagoon,evaporite evaporative lagoon and salt evaporative lagoon sedimentary facies respectively,the"two highs"developed high-energy grain beach and microbial mound,and the north and south slopes developed dolomitic flats around land.(3)The paleogeographic pattern caused natural differentiation of replenishment seawater from the northwest Qilian sea,leading to the eccentric sedimentary differentiation of dolomite,evaporite and salt rock symbiotic system from west to east,which is different from the classic“bull's eye”and“tear drop”distribution patterns.(4)As the Middle Qilian block subducted and collided into the North China Plate,the far-end compression stress transferred,giving rise to the alternate highland and lowland in near north to south direction during the sedimentary period of M56 sub-member.(5)Taolimiao underwater high and Hengshan high developed favorable zones of microbial mounds and grain shoals in south to north strike in M56 sub-member,making them favorable exploration areas with great exploration potential in the future.

关键词： paleogeographic pattern sedimentary differentiation evaporite and carbonate rock favorable reservoir facies zone Ordovician Majiagou Formation Ordos Basin

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Flow and geochemical modeling of drainage from Tomitaka mine,Miyazaki,Japan

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Journal of Environmental Sciences 2015年第10期27卷 130-143页

作者： Kohei Yamaguchi Shingo Tomiyama Hideya Metugi Hiroyuki Ii Akira Ueda Mitsubishi Materials Corporation 1-297 KitabukuroOmiyaSaitama 330-0835Japan Mitsubishi Materials Techno Corporation 1-14-16 KudankitaChiyoda-kuTokyo 102-8205Japan Faculty of Systems Engineering Wakayama University Japan oil Gas and Metals National Corporation Graduate School division of Science and Engineering University of Toyama

The chemistry and flow of water in the abandoned Tomitaka mine of Miyazaki, western Japan were investigated. This mine is located in a non-ferrous metal deposit and acid mine drainage issues from it. The study was undertaken to estimate the quantities of mine drainage that needs to be treated in order to avoid acidification of local rivers, taking into account seasonal variations in rainfall. Numerical models aimed to reproduce observed water levels and fluxes and chemical variations of groundwater and mine drainage. Rock–water interactions that may explain the observed variations in water chemistry are proposed. The results show that：（1） rain water infiltrates into the deeper bedrock through a highly permeable zone formed largely by stopes that are partially filled with spoil from excavations（ore minerals and host rocks）;（2） the water becomes acidic（p H from 3 to 4） as dissolved oxygen oxidizes pyrite;（3） along the flow path through the rocks, the redox potential of the water becomes reducing, such that pyrite becomes stable and p H of the mine drainage becomes neutral; and（4） upon leaving the mine, the drainage becomes acidic again due to oxidation of pyrite in the rocks. The present numerical model with considering of the geochemical characteristics can simulate the main variations in groundwater flow and water levels in and around the Tomitaka mine, and apply to the future treatment of the mine drainage.

关键词： Mine drainage Hydrogen isotope Oxygen isotope Rock–water interaction Water movement

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Nuclear magnetic resonance T_2 spectrum:multifractal characteristics and pore structure evaluation

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Applied Geophysics 2017年第2期14卷 205-215,322页

作者： Yan Jian-Ping He Xu Geng Bin Hu Qin-Hong Feng Chun-Zhen Kou Xiao-Pan Li Xing-Wen State Key Laboratory of oil ＆ gas Reservoir Geoiogy and Exploitation iSouthwest Petroleum University Chengdu 610500 China School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 China Institute of Exploration and Development ShengLi Oil Field SINOPEC Dongying 257015 China Department of Earth and Environmental Science University of Texas at Arlington Texas 76019 USA Changqing division of PetroChina Logging Company Xi＇an 718500 China.

Pore structure characteristics are important to oil and gas exploration in complex low-permeability reservoirs. Using multifractal theory and nuclear magnetic resonance （NMR）, we studied the pore structure of low-permeability sandstone rocks from the 4th Member （Es4） of the Shahejie Formation in the south slope of the Dongying Sag. We used the existing pore structure data from petrophysics, core slices, and mercury injection tests to classify the pore structure into three categories and five subcategories. Then, the T2 spectra of samples with different pore structures were interpolated, and the one- and three-dimensional fractal dimensions and the multifractal spectrum were obtained. Parameters a （intensity of singularity） andf（a）（density of distribution） were extracted from the multifractal spectra. The differences in the three fractal dimensions suggest that the pore structure types correlate with a andf（a）. The results calculated based on the multifractal spectrum is consistent with that of the core slices and mercury injection. Finally, the proposed method was applied to an actual logging profile to evaluate the pore structure of low-permeability sandstone reservoirs.

关键词： NMR T2 spectrum multifractal interpolation pore structure permeability sandstone

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Continuous TDEM for monitoring shale hydraulic fracturing

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Applied Geophysics 2018年第1期15卷 26-34,147,148页

作者： Yan Liang-Jun Chen Xiao-Xiong Tang Hao Xie Xing-Bing Zhou Lei Hu Wen-Bao and Wang Zhong-Xin Hubei Cooperative Innovation Center of Unconventional oil and gas Yangtze University Wuhan 430100 China Jianghan division Petroleum Geophysics Engineering Company SINOPEC Wuhan 430040 China Geophysical Prospecting Company CCDC Chengdu 610213 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China.

Monitoring and delineating the spatial distribution of shale fracturing is fundamentally important to shale gas production. Standard monitoring methods, such as time-lapse seismic, cross-well seismic and micro-seismic methods, are expensive, time- consuming, and do not show the changes in the formation with time. The resistivities of hydraulic fracturing fluid and reservoir rocks were measured. The results suggest that the injection fluid and consequently the injected reservoir are characterized by very low resistivity and high chargeability. This allows using of the controlled-source electromagnetic method （CSEM） to monitor shale gas hydraulic fracturing. Based on the geoelectrical model which was proposed according to the well-log and seismic data in the test area the change rule of the reacted electrical field was studied to account for the change of shale resistivity, and then the normalized residual resistivity method for time lapse processing was given. The time-domain electromagnetic method （TDEM） was used to continuously monitor the shale gas fracturing at the Fulin shale gas field in southern China. A high-power transmitter and multi-channel transient electromagnetic receiver array were adopted. 9 h time series of Ex component of 224 sites which were laid out on the surface and over three fracturing stages of a horizontal well at 2800 m depth was recorded. After data processing and calculation of the normalized resistivity residuals, the changes in the Ex signal were determined and a dynamic 3D image of the change in resistivity was constructed. This allows modeling the spatial distribution of the fracturing fluid. The model results suggest that TDEM is promising for monitoring hydraulic fracturing of shale.

关键词： Shale fracturing resistivity time lapse 3D imaging continuous monitoring

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Seismic Sedimentology Study in the High-Resolution Sequence Framework——A Case Study of Platform Margin Reef-Beach System of Changxing Formation,Upper Permian,Yuanba Area,Northeast Sichuan Basin,China

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Journal of Earth Science 2012年第4期23卷 612-626页

作者：陈雷陆永潮郭彤楼邢凤存焦养泉 Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education China University of Geosciences Southern Exploration and Development division Company of SINOPEC Institute of Sedimentary Geology Chengdu University of Technology State Key Laboratory of oil/gas Reservoir Geology and Exploitation Chengdu University of Technology Faculty of Earth Resources China University of Geosciences

The Yuanba （元坝） area is considered another potential large-scale reef-bank gas field following the Puguang （普光） field. However, there are lots of difficulties on the spatial and temporal distribution of reef-beach and the detailed prediction of the effective reservoir in the sequence stratigraphic framework. In this paper, based on the seismic data, well, log and core, we conduct a high-resolution sequence division and build an isochronal sequence stratigraphic framework for the Changxing （长兴） Formation by the methods of wavelet transformation, FMI, etc.. Then, the corresponding relationship among the lithologic facies, logging facies, seismic facies, seismic attribute facies and reservoir of Changxing Formation were established through well-seismic calibration and geological-geophysical modeling. Furthermore, detailed study on the spatial and temporal distribution of microfacies of the reef-beach was carried out by means of seismic attribute extraction. Meanwhile,combined with impedance inversion, the spatial distribution of porosity of reef-beach reservoir was predicted. The results show that the revolution of the reef-beach system contains three stages which are initial bioclastic bank establishment stage, reef development stage and exposure stage. Also, porosity inversion shows that the region with high value of porosity is located in the reef cap, fore reef and back *** Sedimentology Study in the High-Resolution Sequence Framework

关键词： seismic sedimentology platform margin reef-beach system Changxing Formation,Yuanba area Northeast Sichuan basin.

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Sequence sedimentary evolution and reservoir distribution in the third and fourth members of Sinian Dengying Formation,Gaomo area,Sichuan Basin,SW China

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Petroleum Exploration and Development 2022年第5期49卷 1004-1018页

作者： TAN Lei LIU Hong CHEN Kang NI Hualing ZHOU Gang ZHANG Xuan YAN Wei ZHONG Yuan LYU Wenzheng TAN Xiucheng ZHANG Kun State Key Laboratory of oil and gas Reservoir Geology and Exploration Southwest Petroleum UniversityChengdu 610500China Sichuan Natural gas Geology Key Laboratory Southwest Petroleum UniversityChengdu 610500China CNPC Key Laboratory of Carbonate Reservoirs Southwest Petroleum University division Chengdu 610500China Research Institute of Petroleum Exploration and Development PetroChina Southwest Oilfield CompanyChengdu 610041China Southwest Geophysical Research Institute BGPCNPCChengdu 610213China

Based on comprehensive analysis of cores,thin sections,logging and seismic data,the sequence stratigraphy and sedimentary evolution of the third and fourth members of Sinian Dengying Formation(Deng 3 and Deng 4 members for short)in the Gaomo area of Sichuan Basin were investigated,and the favorable zones for reservoir development in the Deng 3 Member and Deng 4 Member were predicted.(1)Two Type I and one Type II sequence boundaries are identified in the Deng 3 and Deng 4 *** on the identified sequence boundaries,the Deng 3 and Deng 4 members can be divided into two third order sequences SQ3 and SQ4,which are well-developed,isochronal and traceable in this area;the SQ3 thins from west to the east,and the SQ4 thins from northwest to southeast.(2)The sedimentary environment from the depositional period of SQ3 to SQ4 has experienced the evolution from mixed platform to rimmed platform,and the platform rimmed system on the west side is characterized by the development of platform margin microbial mound and grain shoal *** intraplatform area is a restricted platform facies composed of a variety of dolomites,and there are local micro-geomorphic highlands of different scales and scattered intraplatform mounds and shoals.(3)The Deng 4 Member reservoirs,with obvious facies-controlled characteristic,are mainly distributed in the upper part of high-frequency upward shallow cycle and the high-stand systems tract of the third-order sequence vertically,and are more developed in the platform margin belt than in the intraplatform belt,and more developed in the Gaoshiti platform margin belt than in the west Suining platform margin belt on the plane.(4)Three types of favorable reservoir zones of Deng 4 Member have been finely delineated with 3D seismic data;among them,the mound and shoal facies zones developed in the ancient highlands of the intraplatform are the first choice for the next exploration and development of the Deng 4 Member.

关键词： Sinian Dengying Formation rimmed platform sequence stratigraphy sedimentary evolution reservoir favorable exploration zone Gaomo area Sichuan Basin

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Zircon SHRIMP U-Pb dating for island arc volcanic rock of Fangniugou area in Yitong region of Jilin Province

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Journal of Central South University 2014年第7期21卷 2877-2884页

作者：姜正龙邱海峻彭玉鲸张为民梁爽 School of Ocean Sciences China University of Geosciences oil and gas Resources Strategic Research Center of Ministry of Land and Resources Regional Survey of Geology & Mineral Resources Changchun Research Institute of Petroleum Exploration and Development PetroChina

Polymetallic iron ore sulphate deposits of marine volcanic rock have been developed in the Fangniugou area,Jilin Province,China,but the division of volcanic ore-bearing strata has not been specifically elucidated and there is disagreement about the *** sampling and SHRIMP U-Pb zircon dating of volcanic rock for Daheishan in the Fangniugou area and the northeast slope of the Duanjiadian were *** volcanic rock formation period and recorded the volcanic events in the Daheishan mountains were systematically *** samples of high-precision U-Pb zircon dating were used to represent the volcanic rock fomation period of the Late *** measured data reflect that multiple volcanic activities occurred during the Middle Silurian,Early Silurian,Middle Ordovician and Silurian,and Late Ordovician,probably matching volcanic events in the Songnan Basin identified from zircon *** the same time,it is confirmed that a controversial "conglomerate of Daheishan" did in fact develop in the Late Silurian,and those sections of both the Dazigou and Xinlitun-Taoshan with graptolite had been reversed.

关键词： Yitong Jilin Province Fangniugou volcanic rock U-Pb dating zircon SHRIMP dating volcanic event

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Hierarchy and subsurface correlation of muddy baffles in lacustrine delta fronts： a case study in the X oilfield, Subei Basin, China

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Petroleum Science 2018年第3期15卷 451-467页

作者： Kun Qi Xiao-Ming Zhao Li Liu Yi-Qing Su Hua Wang Cheng-Peng Tan Yi-Ting Sun State Key Laboratory of oil and gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu 610500 Sichuan China School of Geoscience and Technology Southwest Petroleum University Chengdu 610500 Sichuan China School of Geoscience Yangtze University Wuhan 430100 Hubei China PetroChina Southwest oil and gasfield Company Chengdu 610500 Sichuan China

Muddy baffles are one of the major geological factors controlling the underground fluid flow as well as the remaining oil distribution. This study used detailed drilling data from the E1f1 reservoir in the X oilfield, Subei Basin, China, to investigate the hierarchical muddy baffles developed on lacustrine delta fronts and their precise cross-well *** to the theories on allogenic and autogenic cycles as well as the genesis and scales of muddy baffles, five orders of muddy baffles were classified, which provided various degrees of difficulty when attempting interwell correlation. Under the guidance of a reliable stratigraphic model, the precise cross-well correlation of muddy baffles could be achieved and the key point of establishment of this stratigraphic model was to calculate foreset angles of hierarchical muddy baffles during deposition. During calculation, the relationships between sediment flow direction, higher-order strata dipping direction,well types and well trajectory direction should all be taken into consideration and some other angles（referred to here as θ1,θ2 and θ3） should also be measured. Such new methods of cross-well correlation for hierarchical muddy baffles could greatly reduce the uncertainties and multiple solutions, which in turn would be significant for efficient development and oil recovery enhancement in the reservoirs.

关键词： Delta front muddy Baffle Genetic analysis Hierarchy division Strata correlation

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Anisotropy measurements and characterization of the Qingshankou shale

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Applied Geophysics 2024年第3期21卷 468-478,617页

作者： Li Qing-feng Yan Xue-hong Yan Wei-lin Ren Li Wang Peng Han Jian-qiang Xia Xue Chen Hao Daqing oilfield Exploration division Daqing163000HeilongjiangChina Daqing Branch Company of CNPC Logging Daqing163000HeilongjiangChina Exploration and Development Research Institute of Daqing oilfield Co. Ltd.Daqing163712China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing100190China

Qingshankou shale(Gulong area,China)exhibits strong acoustic anisotropy characteristics,posing significant challenges to its exploration and *** this study,the five full elastic constants and multipole response law of the Qingshankou shale were studied using experimental *** show that the anisotropy parametersϵandγin the study region are greater than 0.4,whereas the anisotropy parameterδis smaller,generally *** simulations show that the longitudinal and transverse wave velocities of these strong anisotropic rocks vary significantly with inclination angle,and significant differences in group velocity and phase velocity are also *** logging measures the group velocity in dipped boreholes;this differs from the phase velocity to some *** the dip angle increases,the longitudinal and SH wave velocities increase accordingly,while the qSV-wave velocity initially increases and then decreases,reaching its maximum value at a dip of approximately 40°.These results provide an effective guide for the correction and modeling of acoustic logging time differences in the region.

关键词： Transverse isotropy anisotropy parameter sonic logging group velocity phase velocity

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Mechanical Properties Study of Reinforced Thermoplastic Pipes Under A Tensile Load

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China Ocean Engineering 2020年第6期34卷 806-816页

作者： WANG Yang-yang LOU Min TONG Bing WANG Sen School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China Key Laboratory of Unconventional oil&gas Development(China University of Petroleum(East China)) Ministry of EducationQingdao 266580China Hoisting Machinery Business division Xuzhou Construction Machinery Group(XCMG)Xuzhou 221000China Weihai Nacheon Pipeline Co. Ltd.Weihai 264400China

This paper presents a study on the tensile properties of reinforced thermoplastic pipes(RTPs). A mechanical model of RTPs with an arbitrary number of reinforced layers under tensile action is constructed by combining the constitutive relationship of elastoplastic materials with the continuous displacement condition. On this basis, the effects of various parameters such as the winding angle, the number of structurally reinforced layers, and the inner polyethylene(PE) liner thickness on the tensile properties of the RTPs were analyzed, and a tensile test was carried out for validation. The results showed that the winding angle of the structurally reinforced layers was the main factor affecting an RTP's tensile performance— decreases in the winding angle significantly improved its tensile ability,especially the longitudinal strength. With ±45° as the demarcation point, the winding angle smaller than ±45° will result in higher strength in longitudinal direction, and the lifting effect on RTP's mechanical properties of the increasing number of reinforcement layers was better than that of the increasing thickness of the lining layer;when the winding angle was larger than ±45°, the opposite results were obtained. The fibre load was more sensitive to the winding angle than the PE load.

关键词： reinforced thermoplastic pipes tensile properties winding angle polyethylene

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