NSG2021 27th European Meeting of Environmental and Engineering Geophysics最新文献_第3页

Gelation Performance of PAM/PEI Polymer-Based Mud System for Lost Circulation Control PAM/PEI聚合物基防漏失泥浆体系的胶凝性能

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120024

M. Shamlooh, A. Hamza, I. Hussein, M. Nasser, S. Salehi

{"title":"Gelation Performance of PAM/PEI Polymer-Based Mud System for Lost Circulation Control","authors":"M. Shamlooh, A. Hamza, I. Hussein, M. Nasser, S. Salehi","doi":"10.3997/2214-4609.202120024","DOIUrl":"https://doi.org/10.3997/2214-4609.202120024","url":null,"abstract":"Summary Lost circulation is one of the most common problems in the drilling of oil and gas wells where mud escapes through natural or induced fractures. Lost circulation can have severe consequences from increasing the operational cost to compromising the stability of wells. Recently, polymeric formulations have been introduced for wellbore strengthening purposes where it can serve as Loss Circulation Materials (LCMs) simultaneously. Polymeric LCMs have the potential to be mixed with drilling fluids during the operation without stopping to avoid non-productive time. In this study, the significance of most common conventional mud additives and their impact on the gelation performance of Polyacrylamide (PAM) / Polyethyleneimine (PEI) has been investigated. This work helps in better understanding the process of using polymeric formulations in drilling activities. It provides insights to integrate gelling systems that are conventionally used for water shut-off during the drilling operation to replace the conventional loss circulation materials to provide a higher success rate.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123405950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Geoelectric Investigations with Special Measurement Geometry to Delimit Prehistoric Mining Areas in Hallstatt 用特殊测量几何测量法对哈尔施塔特史前矿区进行地电调查

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120009

D. Ottowitz, B. Jochum, M. Yi, S. Pfeiler, A. Römer, K. Kowarik, D. Brandner, A. Nevosad, H. Reschreiter

{"title":"Geoelectric Investigations with Special Measurement Geometry to Delimit Prehistoric Mining Areas in Hallstatt","authors":"D. Ottowitz, B. Jochum, M. Yi, S. Pfeiler, A. Römer, K. Kowarik, D. Brandner, A. Nevosad, H. Reschreiter","doi":"10.3997/2214-4609.202120009","DOIUrl":"https://doi.org/10.3997/2214-4609.202120009","url":null,"abstract":"Summary The Hallstatt area in Austria has a very long history of salt mining, which was frequently interrupted by large landslides. Landslide material filled the prehistoric underground mining chambers and therefore conserved their dimensions. Within several geoelectric measurement campaigns, data from ground surface measurements and from geoelectric profiles in 2 mining tunnels from the 18th century were collected, resulting in a 3D data set of about 80,000 data points. The aim was to track a mining chamber of the Early Iron Age, which has been filled with landslide material. The already existing reconstruction of this mining chamber is based on several archeological excavation points and an interpolation in between. A collapsed mining shaft known from laser scan data has been confirmed beforehand with surface ERT measurements. Due to the high resistive salt rock and the hardness and dryness of the intruded landslide material, the Early Iron Age mining chamber could not be differentiated sufficiently. Instead, results could pinpoint that the mining chambers are following the area of the highest electrical resistivity, which is determined as “Haselgebirge” in geological maps. Therefore, indications of the location of the Early Iron Age mining chamber, where no archaeological finds exists until now, could be given.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129792707","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Verification of ERT Numerical Results of G11n and Traditional Configurations by Quasi Field Modelling 准场模拟验证G11n与传统构型ERT数值结果

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120029

S. Szalai, K. Szokoli, M. K. Baracza, M. Kárpi, P. Szűcs, I. Lemperger, K. Gribovszky, E. Prácser, M. Zubair, L. Szarka

{"title":"Verification of ERT Numerical Results of G11n and Traditional Configurations by Quasi Field Modelling","authors":"S. Szalai, K. Szokoli, M. K. Baracza, M. Kárpi, P. Szűcs, I. Lemperger, K. Gribovszky, E. Prácser, M. Zubair, L. Szarka","doi":"10.3997/2214-4609.202120029","DOIUrl":"https://doi.org/10.3997/2214-4609.202120029","url":null,"abstract":"Summary Traditional geoelectric array configurations, such as e.g. the Wenner-Schlumberger or the Dipole-dipole, may be very effective in one-dimensional or robust two-dimensional investigations, but they are not sufficiently sensitive to SESEP inhomogeneities, which have a Small Effect on the Surface Electrical Potential distribution due to their small size and/or large depth or small resistivity contrast to the host. Their characterization is possible by applying quasi null arrays, which provide very small signals above a homogeneous half-space. Such arrays produced very good results in numerical investigations. In this paper their field applicability is demonstrated which has been heavily questioned. The quasi field analogue modelling experiments validated all of the numerical modelγling results. Many or all of the γ11n arrays could detect prisms and vertical sheets located at depths larger than those detectable by traditional geoelectric configurations. The horizontal resolution of the γ11n arrays, too, proved to be better than that of the traditional arrays. On the basis of this quasi field analogue study, γ11n arrays are expected to be well applicable to indicate SESEP targets (e.g., caves, mines, tunnels, tubes, cables, dykes, fractures), or to follow small variations in the subsurface conditions (monitoring of e.g. dams or waste deposits).","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114685098","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discrete Cosine Transform Reparameterization for Bayesian Time-Lapse ERT Inversion 离散余弦变换重参数化贝叶斯时延ERT反演

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120115

A. Vinciguerra, M. Aleardi, A. Hojat, E. Stucchi

{"title":"Discrete Cosine Transform Reparameterization for Bayesian Time-Lapse ERT Inversion","authors":"A. Vinciguerra, M. Aleardi, A. Hojat, E. Stucchi","doi":"10.3997/2214-4609.202120115","DOIUrl":"https://doi.org/10.3997/2214-4609.202120115","url":null,"abstract":"Summary Time-Lapse electrical resistivity tomography (TL-ERT) is used to monitor dynamic processes through mapping the resistivity variations in the subsurface. Inversion of TL-ERT data is a highly non-linear and ill-conditioned problem characterized by non-unique solutions. For this reason, an accurate uncertainty appraisal is essential to quantify the ambiguity affecting the estimated resistivity model. We present a probabilistic TL-ERT inversion in which the Differential Evolution Markov Chain (DEMC) algorithm samples the posterior probability density function, while the Discrete Cosine Transform (DCT) is used to compress the model space. The model compression aims at mitigating both the ill-conditioned nature of the inversion problem and the curse of dimensionality issue. On the other hand, the DEMC combines principles coming from metaheuristic optimisation methods and Markov Chain Monte Carlo algorithms to speed up the probabilistic sampling. To draw essential conclusions about the reliability and applicability of the implemented algorithm, we focus on synthetic inversion experiments in which we simulate two data acquisitions at different time instants (t0 and t1) and we jointly estimate the resistivity model at t0 along with the resistivity changes at t1. The results demonstrate that the implemented method provides accurate model predictions and uncertainty estimations with an affordable computational cost.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128358804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Near-Mine Exploration for Iron Ore at Malmberget Using Body-Wave Seismic Interferometry 体波地震干涉法在Malmberget铁矿近矿勘探中的应用

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120027

A. Stoch, H. van den Berg

引用次数: 0

3D-Underground Seismics in crystalline, salt and clay rocks 三维地下地震在晶体，盐和粘土岩石

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120046

R. Giese, S. Lueth, H. Richter, B. Wawerzinek, K. Jaksch, R. Esefelder

引用次数: 2

Modeling Hydrocarbon Bearing Reservoirs Using Fuzzy SVR and Electrofacies Analysis 基于模糊SVR和电相分析的含油气储层建模

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120145

N. Moosavi, Mostafa Bagheri

{"title":"Modeling Hydrocarbon Bearing Reservoirs Using Fuzzy SVR and Electrofacies Analysis","authors":"N. Moosavi, Mostafa Bagheri","doi":"10.3997/2214-4609.202120145","DOIUrl":"https://doi.org/10.3997/2214-4609.202120145","url":null,"abstract":"Summary Permeability is one of the key petrophysical parameters of hydrocarbon bearing formations. One of the crucial roles of this parameter is to estimate production rate in oil bearing reservoirs. Permeability is usually measured by core plugs in laboratory. Although the measured value by this method is very precise, it is very expensive and time consuming. Furthermore, core data is not always available for all the wells. Over the last years, regression methods have been widely used to predict permeability in areas with core missing data. Among various regression approaches we selected SVM which works due to SRM and its produced model is less prone to over-fitting problems. Petro-physical properties in heterogeneous reservoirs vary in vertical displacements. So predicting them is difficult due to their abrupt changes. We exploited Electrofacies Analysis using Multi Resolution Graph-Based Clustering to partition formations due to their similarity. We also modified Support Vector Regression to FSVR by giving each data point a membership function to reduce effect of noise and outliers on data.The predicted outputs correlated with core data in the test well. The results show that predicted permeability from FSVR has a notably better correlation with real data compared to correlation outputs from SVR.","PeriodicalId":120362,"journal":{"name":"NSG2021 27th European Meeting of Environmental and Engineering Geophysics","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126524661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anomalous geomagnetic variations associated with the Etna volcanic activity during February 2021 2021年2月与埃特纳火山活动相关的异常地磁变化

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120143

S. Riabova

引用次数: 0

Is It Redundant to Use Model-Based Subtraction Together With the Reference Noise Cancellation? 使用基于模型的减法和参考噪声消除是多余的吗?

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120108

L. Liu, M. Griffiths, Meng Vang, D. Grombacher, J. Larsen

引用次数: 0

Forecasting of the Development of a Landslide by Studying Its Fracture System 通过研究滑坡断裂体系预测滑坡的发展

NSG2021 27th European Meeting of Environmental and Engineering Geophysics Pub Date : 2021-08-29 DOI: 10.3997/2214-4609.202120028

S. Szalai, K. Szokoli, M. K. Baracza, P. Szűcs, I. Lemperger, K. Gribovszky, M. Zubair, L. Szarka

引用次数: 0