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Channel Sandstone Architecture Characterization by Seismic Simulation

Journal of Earth Science 2019年第4期30卷 799-808页

作者： Hongwei Liang Xiaoqing Zhao Longxin Mu Zifei Fan Lun Zhao Shenghe Wu Research Institute of Petroleum Exploration and Development Beijing 100083China geophysical Research Center Bureau of Geophysical Prospecting IncorporationCNPCBaoding 072751China College of Geosciences China University of PetroleumBeijing 102249China

To describe the distribution of sandstone reservoirs between wells finely,this paper takes the sandstone reservoir of Layer Nm II-4 in Qinhuangdao 32-6 oilfield for example,and uses the seismic forward simulation and well loggings to study the channel sandstone reservoir. Under the guidance of the modern rivers and outcrops sandstone distribution pattern,the predicting limitations of the seismic forward simulation about channel sandstone boundaries such as mudstone interlayer between channel sandstone and elevation distance between adjacent channel sandstone are clear. The research shows that the mudstone interlayer can be described by seismic forward simulation seismic when the mudstone interlayer is thicker than 2 m and the channel sandstone is thicker than 10 m because of the appearance of the seismic peak when the main frequency of seismic data is nearly 60 Hz. And the elevation distance between adjacent channel sandstone can be described by the seismic forward simulation when elevation distance is longer than 6 m and the channel sandstone is thicker than 10 m because of the appearance of the seismic peak. And the seismic waveform features of single channel sandstone boundaries such as elevation distance between channels,overbank sandstone and abandoned channels. Under the study mentioned above,the single channel boundaries are described in Layer Nm II-4 of Qinhuangdao 32-6 oilfield,and the predicting boundaries are confirmed by the chemical tracers. The results show that the channel sandstone reservoir architecture characterization can be improved by the seismic forward simulation.

关键词： architecture overbank sandstone seismic abandoned channel

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A-E equation of potential field transformations in the wavenumber domain and its application

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Applied Geophysics 2009年第3期6卷 205-216,299页

作者： Chai Yupu bureau of geophysical prospecting CNPC Zhuozhou 072751 China

A shift sampling theory established by author （1997a） is a generalization of Fourier transform computation theory. Based on this theory, I develop an Algorithm-Error （A-E） equation of potential field transformations in the wavenumber domain, which not only gives a more flexible algorithm of potential field transformations, but also reveals the law of error of potential field transformations in the wavenumber domain. The DFT0η η（0.5, 0.5） reduction-to-pole （RTP） technique derived from the A-E equation significantly improves the resolution and accuracy of RTP anomalies at low magnetic latitudes, including the magnetic equator. The law （origin, form mechanism, and essential properties） of the edge oscillation revealed by the A-E equation points out theoretically a way of improving the effect of existing padding methods in high-pass transformations in the wavenumber domain.

关键词： Potential field transformation Fourier transform shift sampling theory A-E equation DFT0η η(0.5 0.5) algorithm

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Study on crust-mantle tectonics and its velocity structure along the Beijing-Huailai-Fengzhen profile

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Acta Seismologica Sinica(English Edition) 1997年第5期10卷 62-70页

作者：祝治平张先康张建狮张成科赵金仁徐朝凡 1. geophysical prospecting Center State Seismolgoical Bureau 450003 Zhengzhou China

In order to investigate the interrelations of crust and upper mantle tectonics and its velocity distribution as well as seismicity in the Yanhuai basin and its surrounding area, a nearly EW trending Beijing Huailai Fengzhen wide angle reflection/refraction profile, which obliquely passes through seismic zone of Zhangjiakou Bohai Sea and coincides with a deep reflection profile in the Yanhuai basin, was completed recently. The results show: The crust presents layered structures and its thickness gradually increases from 35.0 km in Shunyi to 42.0 km in the west end of the profile; the interior crustal interfaces appear approximately horizontal or slowly sloping down from east to west; In the Yanhuai basin, the crust presents the characteristics of higher velocities alternating with the lower ones and the low velocity bodies obviously exist in the lower part of upper crust. Moreover, there are two deep crustal fault zones which stretch to the Moho discontinuity, are closely related with the seismicity in the Yanhuai area.

关键词： crust mantle velocity structure deep crustal fault wide angle reflection/refraction

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geophysical prediction of organic matter abundance in source rocks based on geochemical analysis:A case study of southwestern Bozhong Sag,Bohai Sea,China

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Petroleum Science 2024年第1期21卷 31-53页

作者： Xiang Wang Guang-Di Liu Xiao-Lin Wang Jin-Feng Ma Zhen-Liang Wang Fei-Long Wang Ze-Zhang Song Chang-Yu Fan State Key Laboratory of Petroleum Resources and prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China State Key Laboratory of Continental Dynamics Northwest UniversityXi'an710069ShaanxiChina Department of Geology Northwest UniversityXi'an710069ShaanxiChina CNOOC Tianjin Branch Company Tianjin300459China

The Bozhong Sag is the largest petroliferous sag in the Bohai Bay Basin,and the source rocks of Paleogene Dongying and Shahejie Formations were buried *** of the drillings were located at the structural high,and there were few wells that met good quality source rocks,so it is difficult to evaluate the source rocks in the study area precisely by geochemical analysis *** on the Rock-Eval pyrolysis,total organic carbon(TOC)testing,the organic matter(OM)abundance of Paleogene source rocks in the southwestern Bozhong Sag were evaluated,including the lower of second member of Dongying Formation(E_(3)d2L),the third member of Dongying Formation(E_(3)d_(3)),the first and second members of Shahejie Formation(E_(2)s_(1+2)),the third member of Shahejie Formation(E_(2)s_(3)).The results indicate that the E_(2)s_(1+2)and E_(2)s_(3)have better hydrocarbon generative potentials with the highest OM abundance,the E_(3)d_(3)are of the second good quality,and the E_(3)d2L have poor to fair hydrocarbon generative ***,the well logs were applied to predict TOC and residual hydrocarbon generation potential(S_(2))based on the sedimentary facies classification,usingΔlogR,generalizedΔlogR,logging multiple linear regression and BP neural network *** various methods were compared,and the BP neural network method have relatively better prediction *** on the pre-stack simultaneous inversion(P-wave impedance,P-wave velocity and density inversion results)and the post-stack seismic attributes,the three-dimensional(3D)seismic prediction of TOC and S_(2)was carried *** results show that the seismic near well prediction results of TOC and S_(2)based on seismic multi-attributes analysis correspond well with the results of well logging methods,and the plane prediction results are identical with the sedimentary facies map in the study *** TOC and S_(2)values of E_(2)s_(1+2)and E_(2)s_(3)are higher than those in E_(3)d_(3)and E_(3)d_(2)L,basicall

关键词： Total organic carbon(TOC) Residual hydrocarbon generation potential(S_(2)) geophysical prediction Seismic attribute Bozhong Sag Bohai Bay Basin

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Characteristic　of　crustal　structure　in　the　Shulu　fault　basin　and　its　vicinity

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Acta Seismologica Sinica(English Edition) 1994年第4期7卷 587-594页

作者：王椿镛张先康林中洋李学清 1. Institute of Geophysics State Seismological Bureau 100081 Beijing China 2. geophysical prospecting Brigade State Seismological Bureau 450003 Zhengzhou China

The deep seismic reflection profiling carried out in Xingtai earthquake area provides a new knowledge of the crustal structure of the Shulu fault basin and its vicinity. In the Ningjin-Xinhe and Lincheng-Julu deep seismic reflection profiles trending in NWW, CDP stack profiles respectively show a one-side fault basin (i. e. Shulu fault basin) within TWT 4. 0s. The width of the basin is about 15 km (Eogene system boundary), and Xinhe fault extends to below TWT 4. 0s (i. e. 8 km deep) with listric shape as a main boundary fault. These profiles also display distinctly a detachment in mid-crust. The Xinhe fault extends downward and converges to the detachment. The results of deep seismic sounding and magnetotelluric sounding indicate the low-velocity and highconductive zone beneath the detachment, which is beneficial to the detach between upper and lower plates. The Renxian-Ningjin deep seismic reflection profile trending in NNE lies within the fault basin, which shows the complicated structure of the basin. The shallow part of the profile is divided into three sub-basins by three lateral uplifts. In the mid-lower crust from Gengzhuangqiao to Xiaohezhuang of the profile, there are a lot of strong reflection events with laminae structure, which have been deformed strongly. Two NWW-trending profiles also have similar reflection feature. This may indicate that there is a relative large region where the magma upwell into mid-lower crust. The abnormal low velocity zone in lower crust indicates that the magmatism is still strong at present. The magmatism may be an important factor of the tectonic active region.

关键词： crustal structure deep seismic reflection profile CDP stack detachment magmatism

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Analysis of the ambiguity of log-constrained seismic impedance inversion

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Petroleum Science 2011年第2期8卷 151-156页

作者： Li Guofa Li Hao Ma Yanyan Xiong Jinliang State Key Laboratory of Petroleum Resources and prospecting China University of Petroleum (Beijing) Beijing 102249 China Key Laboratory of geophysical prospecting China National Petroleum Corporation Beijing 102249 China Dagang oil field PetroChina Tianjin 300280 China

Although the ambiguity of seismic inversion is widely recognized in both theory and practice, so far as a concrete inversion example is concerned, there is not any objective, controllable method or any standard for how to evaluate and determine its ambiguity and reliability, especially for the high frequency components beyond the effective seismic frequency band. Taking log-constrained impedance inversion as an example, a new appraisal method is proposed on the basis of analyzing a simple geological model. Firstly, the inverted impedance model is transformed to a reflection coefficient series. Secondly, the maximum effective frequency of the real seismic data is chosen as a cutoff point and the reflection coefficient series is decomposed into two components by low-pass and high-pass filters. Thirdly, the geometrical reflection characteristics of the high-frequency components and that of the real seismic data are compared and analyzed. Then, the reliability of the inverted impedance model is appraised according to the similarity of geometrical characteristics between the high-frequency components and the real seismic data. The new method avoids some subjectivity in appraising the inverted result, and helps to enhance the reliability of reservoir prediction by impedance inversion technology.

关键词： Log-constrained impedance reflection coefficients seismic inversion ambiguity

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BGP Pioneers in Overseas oil and Gas Exploration--Ten years of hard work by BGP helped the great discovery of CNPC’s 100 million-ton oil field

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China oil & Gas 2021年第2期28卷 60-62页

作者： Han Zhixiong Tan Ye bureau of geophysical prospecting INC

At the end of July,2021,good news came from Chad Project Company and Niger Project Company of China National oil and Gas Exploration and Development Company Ltd.(CNODC);both companies had made major oil and gas discoveries of 100 million tons in their key blocks!The Chad Project Company has passed the overall evaluation of basins in Basin D and Basin B,and the proven reserves reached 100 million tons,*** Project has also discovered the main oil and gas control fault *** present,there are abundant oil and gas discoveries in the completed drilling wells,which will also form a scale reserve reaching hundreds of millions of *** major discoveries in oil and gas are a big achievement of the long-term technical cooperation between the bureau of geophysical prospecting INC(BGP INC)and CNODC,which embodies the wisdom and hard work of collectors and technicians at the BGP INC.

关键词： companies Pioneer CNPC

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Analysis of the Belt and Road Initiative and Risks of Investing in Latin American oil

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China oil & Gas 2018年第2期25卷 30-32页

作者： Zhang Jianfu bureau of geophysical prospecting INC

The Belt and Road Initiative has brought economic development and prosperity to the countries along its route. Latin America is an important area of economic investment for China, with special focus on oil and gas,However, investment is bound to be accompanied by opportunities and risks. Before investing in oil and gas in the corresponding countries, it is necessary to analyze the risk factors from a risk management perspective so as to establish a risk identification system and early warning mechanism. In this way, enterprises can gain competitive advantages and develop in a sustainable way.

关键词： Belt and Road Initiative Latin America oil investment

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Wave-Enhanced Sediment-Gravity Flows in Bohai Bay Lacustrine Basin, Eastern China

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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2416-2431页

作者： BAI Chenyang YU Bingsong DONG Tianyang HAN Shujun GE Jia ZHU Donglin School of Geosciences and Resources China University of Geosciences(Beijing) Department of Earth Environmentaland Planetary SciencesRice University oil & Gas Survey China Geological Survey bureau of geophysical prospecting Inc. China National Petroleum Corp. Department of Geosciences University of Texas at Dallas

Sequences of wave-enhanced sediment-gravity flows(WESGFs) have been widely recognized in the marine shelf environment. In this study, we show observations of WESGF deposits in lacustrine settings using well core and thin section data from the Paleogene in the Jiyang sub-basin, Bohai Bay basin, eastern China. The findings of this study include the following: 1) the sequence of WESGFs in the lacustrine basin is similar to that of marine; it consists of three units, MF1 unit: siltstone with basal erosion surface, MF2 unit: silt-streaked claystone, and MF3 unit: silty-mudstone; and 2) prodelta sand sheets are found in the lacustrine WESGF sequence and are classified as the MFd unit: clay-streaked siltstone. However, because the system size and variability in hydrodynamic conditions are different between the lacustrine and marine basins, lacustrine WESGFs do appear to have three distinguishable features: 1) the sediment grain size and sand content are slightly higher than those of the marine WESGFs; 2) lacustrine WESGFs may contain prodelta sediments or sedimentary sequences of other types of gravity flows, such as hyperpycnal flows; and 3) the scale of the sedimentary structures for lacustrine WESGFs is smaller. The WESGFs found in the continental lacustrine basin provide a new model for sediment dispersal processes in lake environments and may be helpful to explain and predict the distribution of sandy reservoirs for oil and gas exploration.

关键词： wave-enhanced sediment-gravity flows sediment transport lacustrine basin Shahejie Formation Bohai Bay basin

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Differences in lithospheric structures between two sides of Taihang Mountain obtained from the Zhucheng-Yichuan deep seismic sounding profile

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Science China Earth Sciences 2011年第6期54卷 871-880页

作者： LI SongLin LAI XiaoLing LIU BaoFeng WANG ZhiSuo HE JiaYong SUN Yi geophysical prospecting Center China Earthquake Administration Zhengzhou 450002 China Seismological bureau of Henan Province Zhengzhou 450006 China Institute of Geophysics China Earthquake Administration Beijing 100081 China

A 2-D model of lithospheric velocity structures in the southern part of the North China Craton was obtained using data from the Zhucheng-Yichuan deep seismic sounding *** show that there are great differences in lithospheric structures between two sides of Taihang *** the eastern region,the lithosphere is thinner,with a thickness of about 70-80 km,while in the western region,the thickness is 85-120 *** is a jump of the lithospheric thickness across Taihang Mountain gravity anomaly belt with a magnitude of about 30 km.P wave velocities of the lithospheric mantle and lower crust are lower in the eastern region and higher in the western *** the eastern region,there are low velocity bodies in the middle and lower crust,while none were found in the western *** differences indicate that the Taihang Mountain gravity anomaly belt is a belt with a abrupt change of lithospheric thickness and lithological *** to the Pm waveform,it can be deduced that the Moho in the eastern region is not a sharp discontinuity,but a complex transitional *** a preliminary analysis,it is found that the geothermal mechanical-chemical erosion could be the main mechanism causing the thinning and destruction of the lithosphere beneath the eastern side of Taihang *** addition,subduction of the Pacific Plate is an important factor which changes the properties of the lithospheric mantle of the North China Craton.

关键词： North China Craton cratonic destruction deep seismic sounding profile Taihang Mountain gravity anomaly belt

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