Sedimentation Engineering [Working Title]最新文献

Geologic Characteristics and Production Response of the N5.2 Reservoir, Shallow Offshore Niger Delta, Nigeria 尼日利亚尼日尔三角洲浅海N5.2储层地质特征及产量响应

Sedimentation Engineering [Working Title] Pub Date : 2019-05-28 DOI: 10.5772/INTECHOPEN.85517

P. S. Momta

{"title":"Geologic Characteristics and Production Response of the N5.2 Reservoir, Shallow Offshore Niger Delta, Nigeria","authors":"P. S. Momta","doi":"10.5772/INTECHOPEN.85517","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.85517","url":null,"abstract":"Sedimentary facies and structural lineaments represent significant control factors on hydrocarbon flow behavior. These geological elements have been evaluated to understand possible cause(s) of rapid decline in pro¬duction. The N5.2 reservoir, located in shallow marine sandstones, offshore Niger Delta, has experienced decline in oil rate with a corresponding increase in water-cut within two years of beginning of production. The main objective of this study is the determination of reservoir architecture in order to individuate the possible cause(s) of rapid production decline. To this aim, several methods have been used, including the seismic attribute analysis, electrofacies analysis, well log and petrophysical correlations. The obtained results show that the N5.2 reservoir is a massive sandy unit, occur-ring within the paralic Agbada Formation of about 2133 m thick. A contour depth map of the reservoir shows the occurrence of a structural saddle associated with an elongated closure having two structural culminations. Further analysis using the root mean square (RMS) and anti-tracking seismic attributes has indicated a seismic facies parallel to the paleo-coastline direction and several faults and fractures. The high quality of the reservoir, fractures, poor management and water injection may have induced rapid fluid flow and consequently early watercut and decline in production.","PeriodicalId":178387,"journal":{"name":"Sedimentation Engineering [Working Title]","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122271628","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

The Role of Mangroves in Coastal and Estuarine Sedimentary Accretion in Southeast Asia 红树林在东南亚海岸和河口沉积增生中的作用

Sedimentation Engineering [Working Title] Pub Date : 2019-05-23 DOI: 10.5772/INTECHOPEN.85591

P. Chaudhuri, S. Chaudhuri, R. Ghosh

{"title":"The Role of Mangroves in Coastal and Estuarine Sedimentary Accretion in Southeast Asia","authors":"P. Chaudhuri, S. Chaudhuri, R. Ghosh","doi":"10.5772/INTECHOPEN.85591","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.85591","url":null,"abstract":"Mangroves provide a distinctive mechanism of trapping sediment and accelerat-ing land-building processes in tide-dominated coastal and estuarine environments. The complex hydrodynamic and salinity conditions, accumulation rates of both organic and inorganic sediments, primary surface elevation, and hydroperiod influence sediment retention mechanism within mangrove ecosystems. Abundant terrigenous sediment supply can form dynamic mud banks and the complex aerial root system of mangroves may lead to accretion of sediment by weakening the tidal velocity. Such mechanisms are often enhanced by organic flocculation. The efficiency of sediment trapping by mangroves is species specific. Adaptability and resilience of mangroves enable them to cope with the moderate to high rates of sea level rise. However, subsurface movements and deep subsidence due to autocompaction may augment the effects of relative sea level rise. Increasing population pressure and forest-based economic activities have caused global reduction of mangrove coverage challenging the sedimentation processes. Marker horizon techniques and surface elevation table (SET) tests have facilitated assessment of spatial variability in patterns of sediment accretion and surface elevation in various coastal sites of species-diverse Southeast Asia, especially coastal Malaysia and Thailand. The mangroves of the eastern coast of India have witnessed sediment retention, having an association with the seasonal rainfall regime.","PeriodicalId":178387,"journal":{"name":"Sedimentation Engineering [Working Title]","volume":" 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131977424","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: 17

“Geo-archives of a Coastal Lacustrine Eco-system”: Lake Bafa (Mediterranean Sea) “海岸带湖泊生态系统的地质档案”:巴法湖(地中海)

Sedimentation Engineering [Working Title] Pub Date : 2019-04-04 DOI: 10.5772/INTECHOPEN.85589

Özlem Bulkan, Bilgehan Toksoy Ediş, M. N. Çağatay

{"title":"“Geo-archives of a Coastal Lacustrine Eco-system”: Lake Bafa (Mediterranean Sea)","authors":"Özlem Bulkan, Bilgehan Toksoy Ediş, M. N. Çağatay","doi":"10.5772/INTECHOPEN.85589","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.85589","url":null,"abstract":"A hypothetical novel, which aims to summarize the whole geological history of the coastal area surrounding the Mediterranean Sea, probably contains a sum of intensive and impressive topics, such as tsunamis, storms, earthquakes, volcanic activities, human-nature interactions, and their products. These abrupt geo-event changes (e.g., water chemistry fluctuations) remark a dynamic nature of this unique coastal area. Paleolimnological studies of a coastal lacustrine archive (i.e., Lake Bafa, Turkey), associated with syngenetic deposits accumulated in neighboring geological settings (i.e., swamp, deltaic, lagoon, marine), has allowed us to reconstruct the local geological history. Following this hypothesis, we aimed at investigating the paleoenvironmental establishment of the Lake Bafa and surrounding coastal area. Lithologic and geochemical investigations of the lacustrine ( “ BAF37:4.2 m) core and surrounding swamp ( “ BS ” :12 m) sediments supplied us an excellent geo-archive, continuously accumulated during the last 4.5 ky. Following conclusions are provided concerning the main depositional stages: Recent swamp-lacustrine separated stage (S-I: last 0.8 ky), lagoon stage (S-II.: 0.8 – 1.75 ky BP), marine-river interaction stage (S-III: 1.75 – 2.7 ky BP), and marine-dominated stage (S-IV: 2.7 – 4.5 ky BP). Our observations indicate that ecosystem characteristics of the basin have been mainly controlled by the hydroclimate and geotectonic processes.","PeriodicalId":178387,"journal":{"name":"Sedimentation Engineering [Working Title]","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114274094","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

A Long-Term Prediction of Beach Changes around River Delta using Contour-Line-Change Model 基于等高线变化模型的河流三角洲滩涂变化长期预测

Sedimentation Engineering [Working Title] Pub Date : 2019-03-18 DOI: 10.5772/INTECHOPEN.85207

T. Uda, Shiho Miyahara, T. San-nami, M. Serizawa

引用次数: 1

Fingerprinting Sources of the Sediments Deposited in the Riparian Zone of the Ruxi Tributary Channel of the Three Gorges Reservoir (China) 三峡库区汝西汊道河岸带沉积物指纹源研究

Sedimentation Engineering [Working Title] Pub Date : 2019-03-13 DOI: 10.5772/INTECHOPEN.85208

Z. Shi, Dong-chun Yan, A. Wen, Yong-yan Wang

{"title":"Fingerprinting Sources of the Sediments Deposited in the Riparian Zone of the Ruxi Tributary Channel of the Three Gorges Reservoir (China)","authors":"Z. Shi, Dong-chun Yan, A. Wen, Yong-yan Wang","doi":"10.5772/INTECHOPEN.85208","DOIUrl":"https://doi.org/10.5772/INTECHOPEN.85208","url":null,"abstract":"The riparian zone of the Three Gorges Reservoir serves as a critical transitional zone located between the aquatic and surrounding terrestrial environments. The periodic anti-seasonal alternation of wet and dry periods results in an intensive exchange of substance within the riparian zone. The discrimination of the sources of the sediments deposited within the riparian zone is of fundamental importance for the evaluation of the soil pollution and associated environmental impacts and for the protection of the water quality in the reservoir. In this study, a composite fingerprinting technique has been applied to apportion the sediment sources for the riparian zone with different elevations, ranging between 145—155, 155–165, and 165–175 m in a typical tributary channel. From a sediment perspective, the sediments suspended from the Yangtze mainstream represent the primary sources of the riparian deposits. From a contamination perspective, the sediment input from the Ruxi tributary channel represents an important source of pollution for the riparian environment. More effective sediment and sediment-associated contaminant control plans are needed to reduce the potential environmental problems of the riparian zone.","PeriodicalId":178387,"journal":{"name":"Sedimentation Engineering [Working Title]","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114367897","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