检索结果-南通市图书馆

Scanning Fitting Secondary Positioning Method in OBO Survey

在线全文

学校读者我要写书评

暂无评论

石油地球物理勘探 2012年第A2期47卷 1-6页

作者： Xiao Yongxin Yang Haishen Jiang Xianyi Jiang Shaohui Song Weifeng Guo Wu Liu Li bgp research and Development center BGP Inc. Zhuozhou Hebei 072751 China

Q Absorption Compensation Using Hybrid Method

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

石油地球物理勘探 2012年第A2期47卷 57-61页

作者： Wang Wenchuang Li Hequn bgp research and Development center BGP Inc. Zhuozhou Hebei 072751China

Diagenesis of the Triassic Yanchang Formation Tight Sandstone Reservoir in the Xifeng–Ansai Area of Ordos Basin and its Porosity Evolution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2016年第3期90卷 956-970页

作者： LIU Mingjie LIU Zhen WANG Peng PAN Gaofeng School of Geoscience and technology Southwest Petroleum University State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing) Changqing Branch of geophysical research Institute BGP Inc.CNPC

This work aims to reveal the evolution of the porosity in the Triassic Yanchang Formation tight sandstone reservoir of the Xifeng-Ansai area of Ordos Basin. Based on destructive diagenesis （compaction and cementation） and constructive diagenesis （dissolution） of sandstone reservoirs, this study analyzed the diagenesis characteristics of the tight sandstone reservoirs in this area, and discussed the relationship between sandstone diagenesis and porosity evolution in combination with present porosity profile characteristics of sandstone reservoir. The effect simulation princ.ple was employed for the mathematical derivation and simulation of the evolution of porosity in the Yanchang Formation tight sandstone reservoirs. The result shows that compaction always occurs in tight sandstone reservoirs in the Yanchang Formation, and cementation occurs when the burial depth inc.eases to a certain value and remains ever sinc.. Dissolution occurs only at a certain stage of the evolution with window features. In the corresponding present porosity profile, diagenesis is characterized by segmentation. From the shallow to the deep, compaction, compaction, cementation and dissolution, compaction and cementation occur successively. Therefore, the evolution of sandstone porosity can be divided into normal compaction section, acidification and inc.emental porosity section, and normal compaction section after dissolution. The results show that the evolution of sandstone porosity can be decomposed into porosity reduction model and porosity inc.ease model. The superposition of the two models at the same depth in the three stages or in the same geological time can constitute the evolution simulation of the total porosity in sandstone reservoirs. By simulating the evolution of sandstone reservoir porosity of the eighth member in Xifeng area and the sixth member in Ansai area, it shows that they are similar in the evolution process and trend. The difference is caused by the regional uplift or

关键词： tight sandstone diagenesis porosity evolution effect simulation Yanchang Formation Ordos Basin

Application of multi-component joint inversion in oil and gas exploration:A case study of reservoir and gas saturation prediction of the Xujiahe formation in the PLN area of the central Sichuan Basin

在线全文

学校读者我要写书评

暂无评论

Applied Geophysics 2020年第5期17卷 879-889,905页

作者： Wang Dong He Zhen-Hua Wang Xu-Ben Li Le Yang Hai-Tao Fu Zhi-Guo Wang Hong-Yan The college of geophysics Chengdu University of TechnologyChengdu 610059China bgp inc. China National Petroleum CorporationZhuozhou 072750China Mountain geophysical technology Test center CNPC Chengdu 610213China

Multi-component seismic exploration is an important technique in the utilization of P-waves and converted S-waves for oil and gas *** has unique advantages in the structural imaging of gas zones,reservoir prediction,lithology,and gas-water identifi cation,and the development direction and degree of ***-component joint inversion is one of the most important steps in multi-component *** this paper,starting from the basic princ.ple of multi-component joint inversion,the diff erences between the method and single P-wave inversion are ***,the technique is applied to the PLN area of the Sichuan Basin,and the P-wave impedance,S-wave impedance,and density are obtained based on multi-component joint *** the velocity and lithology,porosity,and gas saturation fi tting formulas,prediction results are calculated,and the results are ***,multi-component joint inversion and single P-wave inversion are compared in eff ective reservoir *** results show that multi-component joint inversion inc.eases the constraints on the inversion conditions,reduces the multi-solution of a single P-wave inversion,and is more objective and reliable for the identification of reservoirs,effectively improving the accuracy of oil and gas reservoir prediction and development.

关键词： multi-component joint inversion lithology identifi cation porosity gas saturation reservoir prediction

Logging prediction and evaluation of fracture toughness for the shales in the Longmaxi Formation, Southern Sichuan Basin

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Petroleum 2021年第3期7卷 254-262页

作者： Jian Xiong Kaiyuan Liu Changyou Shi Xiangjun Liu Linlin Huang State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum UniversityChengduChina geophysical technology research center of bgp inc China National Petroleum CorporationChengduChina

The mode-I fracture toughness is of great significance for evaluating the fracturing ability of shale *** this study,the mode-I fracture toughness of the shale in the Lower Silurian Longmaxi Formation,Southern Sichuan Basin was determined with the Cracked Chevron Notched Brazilian Disc(CCNBD).Based on the experimental data,the relationships among the mode-I fracture toughness,the density,the acoustic time and the clay mineral content were *** shale samples for fracture toughness test from cores were commonly limited,the investigation of fracture toughness using well logs was ***,a prediction model was proposed by correlating the fracture toughness with well logs *** results indicate that the fracture toughness of shale samples is from 0.4744 MPa$m1/2 to 1.0607 MPa$m1/2 with an average of 0.7817 MPa$m1/2,indicating that the anisotropy of fracture toughness of the Longmaxi Formation *** clay mineral content and the density have a positive effect on the fracture toughness,whereas the acoustic time plays a negative role on the fracture *** clay mineral content has an important effect on the relationships among fracture toughness,acoustic time and *** prediction model can provide continuous data of mode-I fracture toughness along the wellbore for field hydraulic fracturing operation,and it has certain guiding significance in the exploration and development of oil and gas reservoirs.

关键词： Rock mechanics Longmaxi formation shale CCNBD Mode-I fracture Toughness Prediction method

ixed Cadzow filtering method in fractional Fourier domain

在线全文

学校读者我要写书评

暂无评论

Applied Geophysics 2018年第2期15卷 271-279,363,364页

作者： Cao Zhong-Lin Cao Jun-Xing Wu Fu-Rong He Guang-Ming Zhou Qiang Wu Yu-Lin Chengdu University of technology Chengdu Sichuan 610059 China research and Development center BGP Inc. CNPC Zhuozhou Hebei 072750 China Mountain geophysical technology Test center CNPC Chengdu Sichuan 610213 China

Conventional frequency domain method used in random noise attenuation singular value decomposition （SVD） filtering processing causes bending event damage. To mitigate this problem, we present a mixed Cadzow filtering method based on fractional Fourier transform to suppress random noise in 3D seismic data. First, the seismic data is transformed to the time-frequency plane via the fractional Fourier transform. Second, based on the Eigenimage filtering method and Cadzow filtering method, the mixed high-dimensional Hankel matrix is built; then, SVD is performed. Finally, random noise is eliminated effectively by reducing the rank of the matrix. The theoretical model and real applications of the mixed filtering method in a region of Sichuan show that our method can not only suppress noise effectively but also preserve the frequency and phase of effective signals quite well and significantly improve the signal-to-noise ratio of 3D post-stack seismic data.

关键词： 3D random noise Cadzow filtering method fractional Fourier transforms

Provenance Analyses of Lower Cretaceous Strata in the Liupanshan Basin: From Paleocurrents Indicators, Conglomerate Clast Compositions, and Zircon U-Pb Geochronology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Earth Science 2020年第4期31卷 757-771页

作者： Xiaochen Zhao Chiyang Liu Jianqiang Wang Wei Luo Fangpeng Du Li Ma College of Geology and Environment Xi'an University of Science and TechnologyXi'an 710054China State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi'an 710069China bgp inc. China National Petroleum Corporation Southwest Geophysical Research InstituteChengdu 610000China College of Energy Engineering Xi'an University of Science and TechnologyXi'an 710054China

The Liupanshan Basin constitutes a major portion of the northern North-South tectonic belt. The Lower Cretaceous strata in the Liupanshan Basin recorded the tectono-sedimentary evolution processes of this area and are pivotal for understanding the original sedimentary appearance of the Liupanshan Basin. In this work, we present a study of provenance and tectono-sedimentary evolution of the Liupanshan Basin during the Early Cretaceous. Integrated-paleocurrent directions, gravel clast compositions, and detrital zircon U-Pb isotopic analysis of the Lower Cretaceous Sanqiao and Heshangpu formations were applied to determine the provenance. The gravel clast compositions of Sanqiao Formation conglomerates(mainly inc.uding magmatic rocks, metamorphic rocks and limestones) display various features in different places, revealing different rock components of source areas. The paleocurrent directions of the Sanqiao and Heshangpu formations suggest that the sediments were transported from the basin margin to the center. Detrital zircons of two samples from the Huoshizhai Section(northwestern Liupanshan Basin) yield a dominant unimodal distribution from 420 to 500 Ma, suggesting a single-sourced provenance. Based on the above analyses, comparing to the magmatic records in the Qilian-Qinling orogenic belt, the detritus of the Sanqiao and Heshangpu formations were mainly from the proximal metamorphic and magmatic rocks of the Qilian-Qinling orogenic belt and the limestones of the archaic uplift. Combined with sedimentary characteristics, we concluded that the Liupanshan Basin experienced multi-stage evolution history:(1) the early rifting extension stage(Sanqiao Period),(2) the middle spanning and depression stage(Heshangpu–Early Naijiahe Period), and(3) the late extinc.ion stage(Late Naijiahe Period). The evolution of Liupanshan Basin is closely related to that of Ordos Basin and it is further associated with tectonic transition of the northern North-South tectonic belt.

关键词： provenance analyses tectono-sedimentary evolution Liupanshan Basin Lower Cretaceous North-South tectonic belt

Cenozoic tectonic and sedimentary evolution of southern Qaidam Basin, NE Tibetan Plateau and its implication for the rejuvenation of Eastern Kunlun Mountains

在线全文

学校读者我要写书评

暂无评论

Science China Earth Sciences 2014年第11期57卷 2726-2739页

作者： MAO LiGuang XIAO AnCheng WU Lei LI BenLiang WANG LiQun LOU QianQian DONG YouPu QIN SuHua Department of Earth Sciences Zhejiang University research center for Structures in Oil & Gas Bearing Basins Ministry of Education PetroChina research Institute of Petroleum Exploration & Development Qinghai Oilfield Company PetroChina Zhejiang No.3 Geology Group research Institute of BGP inc. China National Petroleum Corporation

The Eastern Kunlun Mountains play an important role in the growth and eastward extrusion of the Tibetan Plateau. Tectonic and sedimentary study of the Cenozoic Qaidam Basin, especially the southern part, provides key evidence for understanding their evolution. Here we present evidence inc.uding isopach maps, seismic sections and sedimentary analysis of single well to illustrate the sedimentary development of the basin and the structural features of its southern margin. The Qaidam Basin extended across Qiman Tagh-Eastern Kunlun Mountains in the early Cenozoic and withdrew northward at ca. 35.5 Ma, and then buckled as an EW striking elliptical depression sinc. ca. 14.9 Ma, with the main depocenter migrating eastward. Our results support the view that the Kumukol and Hoh Xil basins joined the Qaidam Basin in the early Cenozoic time and we propose the Eastern Kunlun Mountains uplifted in the mid-Miocene.

关键词： NE Tibetan Plateau Qaidam Basin Eastern Kunlun Cenozoic mid-Miocene

Early Cambrian syndepositional structure of the northern Tarim Basin and a discussion of Cambrian subsalt and deep exploration

在线全文

学校读者我要写书评

暂无评论

Petroleum Exploration and Development 2019年第6期46卷 1141-1152页

作者： GUAN Shuwei ZHANG Chunyu REN Rong ZHANG Shuichang WU Lin WANG Lei MA Peiling HAN Changwei research Institute of Petroleum Exploration&Development PetroChinaBeijing 100083China Korla Branch of geophysical research Institute BGP Inc.Korla 841000China

Using field geological survey,drilling and seismic data,combined with the study of regional tectonic evolution and structural deformation,as well as lithological and sedimentary analysis,we reconstructed the basin filling process and paleo-geography of north Tarim Basin in Early Cambrian,aiming to analyze the factors controlling the distribution and spatial architecture of the subsalt reservoir and source units and to define the favorable exploration *** Late Sinian tectonic activities in the northern Tarim Basin were characterized by different patterns in different areas,which controlled the sedimentary pattern in the Early *** boundary faults of Nanhuaian rift basin in the south slope of Tabei uplift and the north slope of Tazhong uplift became reactivated in the Early Cambrian,forming two NEE and EW striking subsidence centers and depocenters,where the predicted thickness of the Yurtusi Formation could reach 250 *** the Xiaoerbulake period,the weak rimmed platform was developed in the hanging wall of syndepositional *** the Nanhuaian rift system in the Tadong and Manxi areas were uplifted and destroyed in the Late Sinian,and appeared as gently slope transiting toward the subsidence center in the Early *** former had the sedimentary features of hybrid facies platform and the latter had the sedimentary features of ramp *** black shale of the Yurtus Formation in the footwall of syndepositional fault and the reef bank of Xiaoerbulake Formation platform margin in the hanging wall in Early Cambrian constitute a predicable source-reservoir *** activity intensity of syndepositional fault controlled the thickness of black shale and the scale of the reef *** is suggested carrying out high accuracy seismic exploration to determine the location of Early Cambrian syndepositional faults,on this basis,to search the reef bank of Xiaoerbulake Formation along the faults westward,and then drill risk exploration we

关键词： Early Cambrian syndepositional structure bedded chert paleogeography subsalt exploration Lower Cambrian Yurtusi Formation Tarim Basin prototype basin