Geomechanics and Geophysics for Geo-Energy and Geo-Resources最新文献_第2页

Remote sensing and aeromagnetic mapping for unveiling mineralization potential: Nuqrah Area, Saudi Arabia 遥感和航空磁测图揭示成矿潜力：沙特阿拉伯努格拉地区

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-09-03 DOI: 10.1007/s40948-024-00844-z

Saad S. Alarifi, Reda Abdu Yousef El‑Qassas, Ali Elsayed Ali Omar, Ahmad M. Al-Saleh, Peter Andráš, Ahmed M. Eldosouky

{"title":"Remote sensing and aeromagnetic mapping for unveiling mineralization potential: Nuqrah Area, Saudi Arabia","authors":"Saad S. Alarifi, Reda Abdu Yousef El‑Qassas, Ali Elsayed Ali Omar, Ahmad M. Al-Saleh, Peter Andráš, Ahmed M. Eldosouky","doi":"10.1007/s40948-024-00844-z","DOIUrl":"https://doi.org/10.1007/s40948-024-00844-z","url":null,"abstract":"Lately, Saudi Arabia has been developing its mineral exploration. However, comprehensive studies of the collected data are not accessible. Thus, the purpose of this research is to identify and map the hydrothermal alteration zones and structural lineaments that regulate the mineral occurrences in the Nuqrah region of the Kingdom of Saudi Arabia using remote sensing and aeromagnetic data. To achieve the desired goal of the study, ASTER remote sensing data were employed, and they were processed in several ways, including principal component analysis, band ratio, and false color composites to reveal the zones of alteration and structure lineaments. In addition, aeromagnetic data was employed to map the lineaments controlling the mineralization. These datasets were integrated using GIS tools to generate a new mineralization potential map of the Nuqrah area, which was classified into three classes: low, moderate, and high probability mineralization. The results showed thirteen intriguing anomalies (high potential mineralization) dispersed over the research area to be prospected. Additionally, techniques such as residual, regional, first vertical derivative, and tilt derivative were utilized to detect the potential mineral-related geologic structures. The results were validated by plotting known mineralization sites on our maps. Six significant faulting trends have been found, according to the lineament map and rose diagrams from remote sensing: NE–SW, WNW–ESE, N–S, ENE–WSW, NNE–SSW, NW–SE, and E–W. The research region is most affected by the NW–SE, ENE–WSW, E–W, and N–S trends, which are organized in decreasing order of magnitude, according to the rose diagram of the aeromagnetic maps. The applied approach can be employed to map potential mineral deposits in Saudi Arabia and similar zones around the globe.","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"34 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of adsorption of different types of surfactants on conglomerate reservoir minerals on chemical oil recovery efficiency 不同类型表面活性剂在砾岩储层矿物上的吸附对化学采油效率的影响

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-09-03 DOI: 10.1007/s40948-024-00868-5

Xiaolong Yan, Yu Tian, Yongmin Shi, Xiaoguang Wang, Runxi Leng, Haoxuan Zheng, Shuai Zhao

{"title":"Effect of adsorption of different types of surfactants on conglomerate reservoir minerals on chemical oil recovery efficiency","authors":"Xiaolong Yan, Yu Tian, Yongmin Shi, Xiaoguang Wang, Runxi Leng, Haoxuan Zheng, Shuai Zhao","doi":"10.1007/s40948-024-00868-5","DOIUrl":"https://doi.org/10.1007/s40948-024-00868-5","url":null,"abstract":"Using surfactants to extract oil, the anionic surfactant Karamay petroleum sulfonate (KPS), the zwitterionic surfactant octadecyl betaine (BS-18) and the nonionic surfactant coconut oil fatty acid diethanolamide (6501) were selected for adsorption experiments with minerals contained in the conglomerate reservoir with different mineral compositions to study the adsorption law of different types of surfactants. Zeolite and montmorillonite, which have the highest specific surface area and zeta potential among the minerals in the conglomerate reservoir, have the most obvious adsorption effect on surfactants, resulting in a large amount of adsorption of KPS and BS-18. The three types of surfactants were then used to conduct physical simulation oil recovery experiments with conglomerate core samples, and the results showed that 6501 had better overall performance, the best adsorption resistance, and a higher degree of recovery in oil recovery experiments, which provided a basis for the selection of surfactants in the process of chemical drive in conglomerate reservoirs.","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"10 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic correlation between surface carbon response and underlying emissions from spontaneous combustion goaf: field study of an abandoned coal mine 自燃煤层表面碳响应与底层排放之间的动态关联：对废弃煤矿的实地研究

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-08-29 DOI: 10.1007/s40948-024-00867-6

Yongjun Wang, Qian Zheng, Hemeng Zhang, Xiaoming Zhang, Wei Dong, Yuichi Sugai, Kyuro Sasaki

{"title":"Dynamic correlation between surface carbon response and underlying emissions from spontaneous combustion goaf: field study of an abandoned coal mine","authors":"Yongjun Wang, Qian Zheng, Hemeng Zhang, Xiaoming Zhang, Wei Dong, Yuichi Sugai, Kyuro Sasaki","doi":"10.1007/s40948-024-00867-6","DOIUrl":"https://doi.org/10.1007/s40948-024-00867-6","url":null,"abstract":"Abandoned coal mine goaf is affected by air leakages and prone to spontaneous combustion, resulting in environmental pollution and geological disasters. Haizhou Open-pit Mine adopts both underground and open-pit mining methods. During the long-term mining process, the original stable stratum structure is constantly destroyed, and the slope slides, increasing cracks and severe air leakage around the goaf and roadway. The spontaneous combustion of coal is particularly prominent after the mine shut down. At present, there is no suitable indirect monitoring method to effectively explore the spontaneous combustion area in goaf. The study developed an all-weather monitoring plan and conducted multi-point continuous long-term measurements of the spontaneous combustion state in one abandoned coal mine goaf located in the eastern part of the Haizhou Open-pit Mine. We evaluated the dynamic correlation between surface CO2 flux (SCF) and changes in the underground fire areas, determined the scope and evolution trend of the fire areas, and identified the distribution and change laws of SCF. The results show a significant positive correlation between SCF and soil temperature; moreover, the SCF value was found to reflect the CO2 emission intensity of the goaf. The high SCF in the test area showed month-wise expansion and increase, while the CO2 emission gradually increased monthly, and the calculated annual total emission was approximately 7017 t. Hence, the study can further provide guidance for the monitoring of spontaneous combustion in shallow coal seams, goaf and the assessment of CO2 emissions from underground coal fires through the on-site monitoring and analysis results.","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"11 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterization and differences of acoustic signals response of semi-circular red sandstone under combined monotonous and cyclic loadings 半圆形红砂岩在单调和循环组合载荷下的声学信号响应特征和差异

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-08-28 DOI: 10.1007/s40948-024-00838-x

Quanle Zou, Chunmei Chen, Zihan Chen, Kang Peng, Hong Lv, Jinfei Zhan

{"title":"Characterization and differences of acoustic signals response of semi-circular red sandstone under combined monotonous and cyclic loadings","authors":"Quanle Zou, Chunmei Chen, Zihan Chen, Kang Peng, Hong Lv, Jinfei Zhan","doi":"10.1007/s40948-024-00838-x","DOIUrl":"https://doi.org/10.1007/s40948-024-00838-x","url":null,"abstract":"After underground coal mining, rocks are often subjected to tensile damage by the interaction of dynamic and static loadings. The process of rock fracture development under dynamic and static loadings will be released in the form of acoustic energy to form an acoustic signal. In addition, the acoustic signals in dynamic loading differ from that in static loading. Therefore, this study conducted three-point bending experiments with continuous dynamic loading and dynamic–static coupling loading on semi-circular red sandstone specimens. The acoustic signals during red sandstone specimens’ tensile damage were monitored in real-time. The results show that red sandstone’s tensile strength and deformation are enhanced under dynamic–static coupling loading. The red sandstone has a more effective acoustic emission hit rate, energy rate, and r during tensile damage under continuous dynamic loading. In dynamic loading, macroscopic fractures are developed in red sandstone, which has few acoustic emission events but releases strong acoustic signals. In static loading, the pores inside the red sandstone are compacted, the rock particles are rearranged, and the tiny fractures are closed, and its acoustic emission events are many but low in energy. In addition, the rock particles in the front area of the static loading fracture are tightly cemented, which increases the difficulty of separating the rock particles in the front area of the fracture under dynamic loading. Then weakening the red sandstone fracture development process and suppressing its acoustic signals. The research results provide more insight into the differences in tensile damage processes in red sandstone under the interaction of dynamic and static loadings.","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"17 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200063","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Experimental and simulation studies on damage characteristics, crack development patterns, and strength reduction mechanisms of sandstone under laser irradiation 激光照射下砂岩的损伤特征、裂纹发展模式和强度降低机制的实验和模拟研究

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-08-28 DOI: 10.1007/s40948-024-00866-7

Junjun Liu, Chuo Zhang, Lei Yang, Xuemin Zhou, Jing Xie, Bengao Yang, Zhiqiang He, Mingzhong Gao

{"title":"Experimental and simulation studies on damage characteristics, crack development patterns, and strength reduction mechanisms of sandstone under laser irradiation","authors":"Junjun Liu, Chuo Zhang, Lei Yang, Xuemin Zhou, Jing Xie, Bengao Yang, Zhiqiang He, Mingzhong Gao","doi":"10.1007/s40948-024-00866-7","DOIUrl":"https://doi.org/10.1007/s40948-024-00866-7","url":null,"abstract":"In order to explore the damage characteristics and crack development laws of hard rock under laser irradiation, laser irradiation experiments on sandstone were conducted considering the interaction of three laser parameters: spot diameter, laser power, and irradiation time. Subsequently, uniaxial compression experiments were conducted on sandstone samples before and after laser irradiation. In addition, based on the maximum principal stress intensity criterion and finite element software, laser induced fracturing sandstone simulation experiments were conducted. Research has found that: Laser irradiation significantly reduces the uniaxial compressive strength of sandstone, with a maximum reduction of about 88.9%, and is also accompanied by a significant decrease in elastic modulus. The degree of sandstone damage escalates with increasing laser power and irradiation time, alongside a reduction in spot diameter. Strong correlations were observed between the strength reduction rate and crack metrics like opening, area, and depth, enabling the establishment of a high-precision regression model. Cracks originate internally within sandstone, initially extending diagonally upwards toward the specimen’s surface before propagating outward. These findings elucidate the mechanisms behind sandstone’s strength reduction and crack propagation under laser irradiation, providing some insights for the practical application of laser rock breaking technology in engineering.","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"2 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rock dynamic strength prediction in cold regions using optimized hybrid algorithmic models 利用优化混合算法模型预测寒冷地区岩石动态强度

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-08-28 DOI: 10.1007/s40948-024-00857-8

You Lv, Yanjun Shen, Anlin Zhang, Li Ren, Jing Xie, Zetian Zhang, Zhilong Zhang, Lu An, Junlong Sun, Zhiwei Yan, Ou Mi

{"title":"Rock dynamic strength prediction in cold regions using optimized hybrid algorithmic models","authors":"You Lv, Yanjun Shen, Anlin Zhang, Li Ren, Jing Xie, Zetian Zhang, Zhilong Zhang, Lu An, Junlong Sun, Zhiwei Yan, Ou Mi","doi":"10.1007/s40948-024-00857-8","DOIUrl":"https://doi.org/10.1007/s40948-024-00857-8","url":null,"abstract":"Predicting the dynamic mechanical characteristics of rocks during freeze–thaw cycles (FTC) is crucial for comprehending the damage process of FTC and averting disasters in rock engineering in cold climates. Nevertheless, the conventional mathematical regression approach has constraints in accurately forecasting the dynamic compressive strength (DCS) of rocks under these circumstances. Hence, this study presents an optimized approach by merging the Coati Optimization Algorithm (COA) with Random Forest (RF) to offer a reliable solution for nondestructive prediction of DCS of rocks in cold locations. Initially, a database of the DCS of rocks after a series of FTC was constructed, and these data were obtained by performing the Split Hopkinson Pressure Bar Test on rocks after FTC. The main influencing factors of the test can be summarized into 10, and PCA was employed to decrease the number of dimensions in the dataset, and the microtests were used to explain the mechanism of the main influencing factors. Additionally, the Backpropagation Neural Network and RF are used to construct the prediction model of DCS of rock, and six optimization techniques were employed for optimizing the hyperparameters of the model. Ultimately, the 12 hybrid prediction models underwent a thorough and unbiased evaluation utilizing a range of evaluation indicators. The outcomes of the research concluded that the COA-RF model is most recommended for application in engineering practice, and it achieved the highest score of 10 in the combined score of the training and testing phases, with the lowest RMSE (4.570,8.769), the lowest MAE (3.155,5.653), the lowest MAPE (0.028,0.050), the highest R2 (0.983,0.94).","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"63 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142225715","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Creep deformation characteristics and control technology in deep mine soft rock roadway 深矿软岩巷道蠕变变形特征及控制技术

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-08-24 DOI: 10.1007/s40948-024-00849-8

Lianghuan Yan, Jucai Chang, Wenbao Shi, Tuo Wang, Longquan Qiao, Yijun Guo, Hongda Wang

{"title":"Creep deformation characteristics and control technology in deep mine soft rock roadway","authors":"Lianghuan Yan, Jucai Chang, Wenbao Shi, Tuo Wang, Longquan Qiao, Yijun Guo, Hongda Wang","doi":"10.1007/s40948-024-00849-8","DOIUrl":"https://doi.org/10.1007/s40948-024-00849-8","url":null,"abstract":"In order to control the strong ageing creep and large deformation of deep soft rock roadway effectively, with the 61–71 track on the uphill of the mining area in Suzhou, Anhui as the research background, the triaxial creep test of mudstone was conducted using the TYJ-1500 M rock mechanics testing system. The creep deformation and failure characteristics of mudstone were analyzed. Additionally, the creep deformation characteristics of deep soft rock roadways were obtained through FLAC3D numerical simulation experiment, and the control techniques for deep soft rock roadway was proposed. The results showed that the axial strain and lateral strain of the specimen were mainly instantaneous strain and creep strain under triaxial stress conditions, and the both confining pressure and the axial pressure have a significant impact on the deformation and creep failure strength of the specimen. Under the condition of high ground stress and complex geological structure, the high stress concentration of roadway roof and floor and two bottom angles is the main cause of creep failure of soft rock roadway, and the large degree of surrounding rock fragmentation and unreasonable support mode reduce the bearing capacity of surrounding rock and aggravate the creep failure of roadway. The 'anchor net cable shotcrete + floor and two corners in floor bolt-grouting + deep and shallow hole grouting + secondary reinforcement support' combined support method was proposed and industrially tested, with average deformation of the roof, floor, and two sidewalls being 111.9 and 62.5 mm, respectively, representing 13.2 and 10.3% of the deformation under the original support scheme.","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"7 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A B-spline material point method for deformation failure mechanism of soft–hard interbedded rock 软硬夹层岩变形破坏机理的 B-样条曲线材料点法

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-08-23 DOI: 10.1007/s40948-024-00865-8

Zonghuan Peng, Jianlong Sheng, Zuyang Ye, Qianfeng Yuan, Xincheng Fan

{"title":"A B-spline material point method for deformation failure mechanism of soft–hard interbedded rock","authors":"Zonghuan Peng, Jianlong Sheng, Zuyang Ye, Qianfeng Yuan, Xincheng Fan","doi":"10.1007/s40948-024-00865-8","DOIUrl":"https://doi.org/10.1007/s40948-024-00865-8","url":null,"abstract":"Geological hazards related to soft–hard interbedded rock are frequent in rock engineering. The material point method (MPM) is a mesh-free numerical approach specifically designed for analyzing large deformations. Notably, significant grid-crossing errors frequently arise when material points traverse the underlying grid. To investigate the failure mechanism of soft–hard interbedded rock, an enhanced MPM incorporating B-spline basis functions and Voronoi polygon discretization is developed and subsequently validated through comparisons with uniaxial compression test data and other numerical methods. The numerical results of soft–hard interbedded rock specimens associated with different soft layer dips (SLD) and confining pressures indicate that the SLD has a great effect on compressive strength and crack extension at low confining pressure. Rocks from SLD-30° to SLD-75° correspond to the “sliding failure along discontinuities” failure mode and have lower compressive strength than rocks with other SLD angles. It is also demonstrated that the propagation of cracks leads to a significant alteration in the internal stress state of the rock, and that stress concentrations at the crack tip exacerbate the development of failure surface. Furthermore, the failure mode of soft–hard interbedded rock can be categorized into four types: (1) sliding failure across multiple discontinuities, (2) tensile fracture across multiple discontinuities, (3) sliding failure along discontinuities, (4) tensile-split along discontinuities.","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"4 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200068","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Time-dependent damage characteristics of shale induced by fluid–shale interaction: a lab-scale investigation 流体与页岩相互作用诱发的页岩随时间变化的破坏特征：实验室规模的研究

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-08-22 DOI: 10.1007/s40948-024-00859-6

Han Cao, Jie Zhang, Pinghe Sun, Qiang Gao, Ting Bao

引用次数: 0

An accurate identification and spatial characterization method for the development degree of preferential flow paths in water-flooded reservoir 水淹水库优先流道发育程度的精确识别和空间表征方法

IF 5 2区工程技术

Geomechanics and Geophysics for Geo-Energy and Geo-Resources Pub Date : 2024-08-19 DOI: 10.1007/s40948-024-00817-2

Hongtao Fu, Kaoping Song, Zilin Ma, Yu Zhao, Lihao Liang, Hu Guo

{"title":"An accurate identification and spatial characterization method for the development degree of preferential flow paths in water-flooded reservoir","authors":"Hongtao Fu, Kaoping Song, Zilin Ma, Yu Zhao, Lihao Liang, Hu Guo","doi":"10.1007/s40948-024-00817-2","DOIUrl":"https://doi.org/10.1007/s40948-024-00817-2","url":null,"abstract":"Water flooding is one of the most important methods for oil field development, It accounts for more then 70% of China's crude oil production. However, in the progress of water flooding, preferential flow paths often formed between oil and water wells, which seriously restricts production rate. How to effectively identify the preferential flow paths has become the key to improving the effect of water flooding. In this paper, to solve the problem of difficult identification of preferential flow paths in reservoirs, through the change of core seepage law with high pore volume water flooding experiment, parameters such as multiple of water flux, change value of permeability, and water saturation were selected for analysis. The weight coefficient for each parameter was determined by the variation coefficient method of objective weight. Subsequently, a comprehensive reservoir identification index was obtained by weighting each parameter, which was used to describe the development degree of the preferential flow paths. Finally, quantitative criteria of preferential flow paths were given. The spatial characterization of preferential flow paths was realized by post processing of the Eclipse software. The new method for identifying preferential flow paths fully considers the changes in physical properties and fluid mobility of water-flooded reservoirs. The results of the new applied to a typical water-flooded reservoir in the Bohai Bay Basin show that the preferential flow paths calculated by the new method were highly consistent with the judgment results of tracers. It can accurately and quickly identify the preferential flow paths. This study provides a scientific basis for adjusting measures of water-flooded reservoirs to further enhance oil recovery. Moreover, the new method holds broader prospects for application in the field of porous media transport.","PeriodicalId":12813,"journal":{"name":"Geomechanics and Geophysics for Geo-Energy and Geo-Resources","volume":"46 1","pages":""},"PeriodicalIF":5.0,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142200070","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0