Applied Geophysics最新文献_第8页

Serial structure multi-task learning method for predicting reservoir parameters 储层参数预测的串联结构多任务学习方法

4区地球科学

Applied Geophysics Pub Date : 2023-11-13 DOI: 10.1007/s11770-022-1035-2

Bin-Sen Xu, Ning Li, Li-Zhi Xiao, Hong-Liang Wu, Feng-Zhou, Bing Wang, Ke-Wen Wang

{"title":"Serial structure multi-task learning method for predicting reservoir parameters","authors":"Bin-Sen Xu, Ning Li, Li-Zhi Xiao, Hong-Liang Wu,  Feng-Zhou, Bing Wang, Ke-Wen Wang","doi":"10.1007/s11770-022-1035-2","DOIUrl":"10.1007/s11770-022-1035-2","url":null,"abstract":"<div><p>Buiding data-driven models using machine learning methods has gradually become a common approach for studying reservoir parameters. Among these methods, deep learning methods are highly effective. From the perspective of multi-task learning, this paper uses six types of logging data—acoustic logging (AC), gamma ray (GR), compensated neutron porosity (CNL), density (DEN), deep and shallow lateral resistivity (LLD) and shallow lateral resistivity (LLS) —that are inputs and three reservoir parameters that are outputs to build a porosity saturation permeability network (PSP-Net) that can predict porosity, saturation, and permeability values simultaneously. These logging data are obtained from 108 training wells in a medium-low permeability oilfield block in the western district of China. PSP-Net method adopts a serial structure to realize transfer learning of reservoir-parameter characteristics. Compared with other existing methods at the stage of academic exploration to simulating industrial applications, the proposed method overcomes the disadvantages inherent in single-task learning reservoir-parameter prediction models, including easily overfitting and heavy model-training workload. Additionally, the proposed method demonstrates good anti-overfitting and generalization capabilities, integrating professional knowledge and experience. In 37 test wells, compared with the existing method, the proposed method exhibited an average error reduction of 10.44%, 27.79%, and 28.83% from porosity, saturation, permeability calculation. The prediction and actual permeabilities are within one order of magnitude. The training on PSP-Net are simpler and more convenient than other single-task learning methods discussed in this paper. Furthermore, the findings of this paper can help in the re-examination of old oilfield wells and the completion of logging data.</p></div>","PeriodicalId":55500,"journal":{"name":"Applied Geophysics","volume":"19 4","pages":"513 - 527"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796598","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Three-dimensional crustal velocity structure and activity characteristics of the Madoi Ms7.4 earthquake in 2021 2021年马多伊Ms7.4地震三维地壳速度结构与活动特征

4区地球科学

Applied Geophysics Pub Date : 2023-11-13 DOI: 10.1007/s11770-022-1032-5

Yong Ma, Hai-Jiang Zhang, Lei Gao, Zhi-Gang Chen

{"title":"Three-dimensional crustal velocity structure and activity characteristics of the Madoi Ms7.4 earthquake in 2021","authors":"Yong Ma, Hai-Jiang Zhang, Lei Gao, Zhi-Gang Chen","doi":"10.1007/s11770-022-1032-5","DOIUrl":"10.1007/s11770-022-1032-5","url":null,"abstract":"<div><p>In this paper, using natural earthquake P-wave arrival time data recorded by the seismic network in the surrounding area of Madoi, the three-dimensional fine P-wave crustal velocity structure at depths above 60 km in the epicenter of the Madoi Ms7.4 earthquake was inverted using the double-difference seismic tomography method. On the basis of the relocation of the source of the aftershock sequence, we summarized the strip-shaped distribution characteristics along the strike of the Jiangcuo fault, revealing the significant heterogeneity of the crustal velocity structure in the source area. Research has found that most of the Madoi Ms7.4 aftershocks were located in the weak area of the high-speed anomaly in the upper crust. The focal depth changed with the velocity structure, showing obvious fluctuation and segmentation characteristics. There was a good correspondence between the spatial distribution and the velocity structure. The high-velocity bodies of the upper crust in the hypocenter area provided a medium environment for earthquake rupture, the low-velocity bodies of the middle crust formed the deep material, and the migration channel and the undulating shape of the high-speed body in the lower crust corroborated the strong pushing action in the region. The results confirmed that under the continuous promotion of tectonic stress in the Madoi area, the high-speed body of the Jiangcuo fault blocked the migration of weak materials in the middle crust. When the stress accumulation exceeded the limit, the Madoi Ms7.4 earthquake occurred. Meanwhile, the nonuniform velocity structure near the fault plane determined the location of the main shock and the spatiotemporal distribution of the aftershock sequence.</p></div>","PeriodicalId":55500,"journal":{"name":"Applied Geophysics","volume":"19 4","pages":"590 - 602"},"PeriodicalIF":0.0,"publicationDate":"2023-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134796484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Activity characteristics of significant earthquake swarms in the Bohai Rim region 环渤海地区重大地震群的活动特征

4区地球科学

Applied Geophysics Pub Date : 2023-11-11 DOI: 10.1007/s11770-023-1036-9

Jin-Meng Bi, Cheng Song, Fu-Yang Cao

引用次数: 0

Deformation mechanism and treatment technology research of coal pillars in acute inclined goafs under expressway 高速公路急倾斜采空区煤柱变形机理及治理技术研究

4区地球科学

Applied Geophysics Pub Date : 2023-10-12 DOI: 10.1007/s11770-023-1027-x

Wei-Xing Bao, Zhi-Wei Ma, Hong-Peng Lai, Rui Chen

引用次数: 0

Development and application of an aeromagnetic survey system for a large load rotary-wing UAV 大载荷旋翼无人机航磁测量系统的研制与应用

4区地球科学

Applied Geophysics Pub Date : 2023-10-07 DOI: 10.1007/s11770-023-1033-z

Jin-Peng Huang, Hua Guo, Song Han, Yan Huang

引用次数: 0

Detection method of coal-rock interface and low-resistivity anomalous body based on azimuth electromagnetic wave 基于方位角电磁波的煤岩界面及低阻异常体探测方法

4区地球科学

Applied Geophysics Pub Date : 2023-10-02 DOI: 10.1007/s11770-023-1031-1

Gang Chen, Quan-xin Li, Zhi-yi Liu, Long Chen, Yi Zhang

引用次数: 0

Application of Soil Parameter Inversion Method Based on BP Neural Network in Foundation Pit Deformation Prediction 基于BP神经网络的土体参数反演方法在基坑变形预测中的应用

4区地球科学

Applied Geophysics Pub Date : 2023-09-29 DOI: 10.1007/s11770-023-1029-8

Hao-hao Ma, Shuai Yuan, Zhi-zheng Zhang, Ya-hui Tian, Sen-sen Dong

引用次数: 0

3D transient electromagnetic inversion based on explicit finite-difference forward modeling 基于显式有限差分正演模拟的三维瞬变电磁反演

4区地球科学

Applied Geophysics Pub Date : 2023-09-19 DOI: 10.1007/s11770-023-1028-9

Fei Li, Qiang Tan, Lai-Fu Wen, Dan Huang

引用次数: 0

Winner of the Ronald Melzack-Canadian Journal of Pain 2022 Paper of the Year Award/Récipiendaire du Prix Ronald Melzack Pour L'Annee 2022 des Articles Parus Dans la Revue Canadienne de la Douleur. 罗纳德·梅尔扎克奖得主-加拿大疼痛杂志2022年论文奖/加拿大疼痛杂志2022年文章奖得主

IF 2.4 4区地球科学

Applied Geophysics Pub Date : 2023-09-05 eCollection Date: 2023-01-01 DOI: 10.1080/24740527.2023.2254576

Jo Nijs, Joel Katz

引用次数: 1

Longitude correction method for the field magnetic surveyed diurnal-variation correction 场磁测日变改正的经度改正方法

4区地球科学

Applied Geophysics Pub Date : 2023-08-18 DOI: 10.1007/s11770-023-1025-z

Shu-Peng Su, Bo Li, Hai-Yang Zhang, Hui-Qin Zhao, Jin-Peng Huang

{"title":"Longitude correction method for the field magnetic surveyed diurnal-variation correction","authors":"Shu-Peng Su, Bo Li, Hai-Yang Zhang, Hui-Qin Zhao, Jin-Peng Huang","doi":"10.1007/s11770-023-1025-z","DOIUrl":"10.1007/s11770-023-1025-z","url":null,"abstract":"<div><p>Solar quiet daily variation (Sq) are dependent on local time. Herein, we applied the moving superposition method to separate the Sq component of correction observatory data and performed a time difference correction on the Sq component according to the longitudinal difference between the correction observatory and the field station while maintaining the time of other data components. The data were then reconstructed and used for diurnal-variation correction to improve the accuracy of the daily variations correction resu; lts The moving superposition method employs data of “nonmagnetic disturbance days” obtained 15 d before and after to perform the superposing average calculation on a daily basis, aiming to obtain the Sq of continuous morphological changes. The effect of longitude correction was tested using the observatory record and field survey data. The average correction distance of the test observatories was 2114 km, and the correction accuracies of the H (horizontal component of geomagnetic field), D (geomagnetic declination), and Z (vertical component of geomagnetic field) were improved by 28.4%, 45.0%, and 21.7%, respectively; the average correction distance of the field stations was 2130 km, and the correction accuracies of the F (geomagnetic total intensity), D, I (geomagnetic inclination) components were improved by 35.2%, 26.7%, and 13.9%, respectively. The test results also demonstrated that the longitude correction effect was greater with an increased correction distance.</p></div>","PeriodicalId":55500,"journal":{"name":"Applied Geophysics","volume":"19 4","pages":"580 - 589"},"PeriodicalIF":0.0,"publicationDate":"2023-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48150956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0