› › Subsurface Evaluation Of Source Rock And Hydrocarbon Potential Of The Anambra Basin South Eastern Nigeria

Subsurface Evaluation of Source Rock and Hydrocarbon Potential of the Anambra Basin, South Eastern Nigeria

Author : Iheanacho Princewill Ugochukwu

Publisher : Universal-Publishers

Page : 111 pages

File Size : 41,85 MB

Release : 2010-09-02

Category :

ISBN : 1599423391

Get eBook

Book Description

Exploratory activities carried out in the Anambra Basin have revealed that the basin has the potential of generating hydrocarbon. Subsurface core samples obtained from Enugu 1325 and 1331 wells within the Anambra Basin were utilized in this study with the aims of characterizing the organic matter as well as determining the maturity in order to deduce the hydrocarbon potential of the basin. The study was also aimed at determining the palaeo-depositional environment as well as highlighting the source input of the organic matter. The analytical procedure for total organic matter and rock eval pyrolysis was achieved by the use of LECO 600 analyzer. Soluble organic matter (SOM) was determined by the use of Soxhlet Extractor while whole rock analysis and biomarker distributions were determined by the use of gas chromatography (GC) and gas chromatography/mass spectrometry (GC-MS) respectively. The lithologic sequence of both wells consists of coals, shales and siltstones. The coals are black while the shales range from light to dark grey with some coal intercalation. The coals and shales are fissile while the siltstones with light grey colour are medium grained. Results of the Total Organic Carbon (TOC), Soluble Organic Matter (SOM) and Generic Potential (GP) ranged from 1.59 - 70.33wt%, 238.1 - 4095.2 ppm and 2.34 - 177.36 respectively. These imply that the source rocks are moderately to fairly rich in organic matter. Cross plots of hydrocarbon potential versus TOC, SOM against TOC indicated that the source rock is Type III and gas prone. Tmax value ranges from 426 - 435 degrees C and Bitumen ratio is from 22.4 - 106 which indicate low maturation level for the source rock. The ratios of C29 hopane (beta)(alpha)/(alpha)(beta), C30 (beta)(alpha)/(alpha)(beta), and 22S/22S+22R C32 hopane ranged from 0.32 to 0.57, 0.20 to 0.59, and 0.49 to 0.56 respectively thus suggesting immature organic matter. Cross plot of hydrogen index (HI) versus Tmax, production index (PI) versus Tmax both suggest that the source rock is immature. Methyl Phenanthrene Index (MPI-1), Methyl Dibenzothiophene ratio (MDR) and calculated vitrinite reflectance (Rm), showed ranges of 0.14-0.76, 0.99-4.21, 0.62-0.82 respectively. These further indicate immature to marginally mature status for the sediments. Values of C24 tetracyclic/C24 tricyclic terpanes and the C19/C20 tricyclic terpane ratios, show respective ranges of 1.54-2.25 and 0.74-1.34 respectively, which are indicative of terrigenous organic matter. The dominance of C29 over C28 and C27 further indicate higher terrigenous input. The abundance of 1,2,5 TMN(trimethyl naphthalene) suggests a significant land plant contribution to the organic matter. The Pr/Ph ratio values of 7.2 - 8.9 point to terrestrial organic input under oxic conditions. A cross plot of Ts/Ts+Tm versus dia/(dia + reg) C27 steranes and high ratio of C30/C29Ts suggests suboxic depositional condition. The presence of C27 to C29 steranes and diasteranes indicates mixed sources (marine and terrigenous) with prospects to generate both oil and gas. It can be deduced that the sediments were deposited in a suboxic, low Eh environment, and contain moderately to fairly rich organic matter with a substantial terrigenous input. The source rock has the potential to generate gas rather than oil given sufficient maturity.



Geology and Mineral Resources of Nigeria

Author : Nuhu George Obaje

Publisher : Springer

Page : 222 pages

File Size : 31,28 MB

Release : 2009-06-18

Category : Science

ISBN : 3540926852

Get eBook

Book Description

Contains details on the geological units of Nigeria and the associated mineral resources. The book is divided into three parts. Part 1 discusses the geology of the crystalline rocks and their regional distribution while the sedimentary basins constitute the subject of Part 2. Part 3 takes the mineral resources of Nigeria one on one, their geological environment, mode of occurrence, localities and where possible the reserves estimation. Thereafter, an account of the previous and current mining policies (including that of petroleum) of the Nigerian government is given and goes ahead to list some specific investment opportunities in the solid minerals sector.



Black Shales

Author : P. B. Wignall

Publisher :

Page : 152 pages

File Size : 36,56 MB

Release : 1994

Category : Nature

ISBN :

Get eBook

Book Description

Black shales provides the first comprehensive synthesis of the diverse research regarding the origin of petroleum source rocks. The book offers in-depth reviews from the fields sedimentology, palaeoecology, and geochemistry, and particularly focuses on the influence of palaeo-oxygen levels. Current debates--including the one over the influence of sedimentation rate, productivity, and enhanced preservation on the burial efficiency of organic carbon--receive a lively discussion. In addition, the importance of newly defined concepts of sequence stratigraphy to models of the formation of black shales receives an in-depth treatment for the first time. The book will be of interest to all geologists investigating palaeoenvironments, particularly those engaged in the search for hydrocarbons.



Practical Petroleum Geochemistry for Exploration and Production

Author : Harry Dembicki

Publisher : Elsevier

Page : 344 pages

File Size : 10,70 MB

Release : 2016-10-06

Category : Technology & Engineering

ISBN : 0128033517

Get eBook

Book Description

Practical Petroleum Geochemistry for Exploration and Production provides readers with a single reference that addresses the principle concepts and applications of petroleum geochemistry used in finding, evaluating, and producing petroleum deposits. Today, there are few reference books available on how petroleum geochemistry is applied in exploration and production written specifically for geologists, geophysicists, and petroleum engineers. This book fills that void and is based on training courses that the author has developed over his 37-year career in hydrocarbon exploration and production. Specific topical features include the origin of petroleum, deposition of source rock, hydrocarbon generation, and oil and gas migrations that lead to petroleum accumulations. Also included are descriptions on how these concepts are applied to source rock evaluation, oil-to-oil, and oil-to-source rock correlations, and ways of interpreting natural gas data in exploration work. Finally, a thorough description on the ways petroleum geochemistry can assist in development and production work, including reservoir continuity, production allocation, and EOR monitoring is presented. Authored by an expert in petroleum geochemistry, this book is the ideal reference for any geoscientist looking for exploration and production content based on extensive field-based research and expertise. - Emphasizes the practical application of geochemistry in solving exploration and production problems - Features more than 200 illustrations, tables, and diagrams to underscore key concepts - Authored by an expert geochemist that has nearly 40 years of experience in field-based research, applications, and instruction - Serves as a refresher reference for geochemistry specialists and non-specialists alike



Introduction to Organic Geochemistry

Author : Stephen D. Killops

Publisher : John Wiley & Sons

Page : 673 pages

File Size : 18,86 MB

Release : 2013-04-16

Category : Science

ISBN : 1118697200

Get eBook

Book Description

An Introduction to Organic Geochemistry explores the fate of organic matter of all types, biogenic and man-made, in the Earth System. investigates the variety of pathways and biogeochemical transformations that carbon compounds can experience over a range of time scales and in different environments scope widened to provide a broad and up-to-date background - structured to accommodate readers with varied scientific backgrounds essential terminology is defined fully and boxes are used to explain concepts introduced from other disciplines further study aided by the incorporation of carefully selected literature references It investigates the variety of pathways and biogeochemical transformations that carbon compounds can experience over a range of time scales and in different environments.



Hydrocarbon Prospectivity in the Eastern Coastal Swamp Depo-belt of the Niger Delta Basin

Author : Chidozie Izuchukwu Princeton Dim

Publisher : Springer

Page : 80 pages

File Size : 49,83 MB

Release : 2016-09-17

Category : Science

ISBN : 3319446274

Get eBook

Book Description

This book broadens readers’ understanding of the stratigraphic framework and structural styles for improved hydrocarbon prospectivity in the intermediate and deeper horizons of the eastern Coastal Swamp Depo-belt of Nigeria’s Niger Delta Basin. It equips readers to interpret complex sedimentary units, such as the paralic sequence of the Niger Delta Basin, using sequence stratigraphic tools integrated with well logs, biostratigraphic, paleobathymetric and seismic data. It also offers numerous tips and insights into reservoirs, seals, source rocks and hydrocarbon-type trends/distribution across several production fields, and provides a valuable guide to support exploration and production.



Petroleum Abstracts

Author :

Publisher :

Page : 1716 pages

File Size : 24,17 MB

Release : 1992

Category : Petroleum

ISBN :

Get eBook

Book Description





Petroleum Geology of the North Sea

Author : K. W. Glennie

Publisher : John Wiley & Sons

Page : 656 pages

File Size : 27,37 MB

Release : 2009-06-29

Category : Science

ISBN : 1444313401

Get eBook

Book Description

Since the 3rd edition of this publication, emphasis within the petroleum industry has shifted from exploration to appraisal and development of existing hydrocarbon resources. This change is reflected in this new 4th edition, which has been significantly expanded to accomodate additional material. The centrepiece of the book, however, remains a series of descriptions, in stratigraphic order, of the depositional history and hydrocarbon related rock units of the North Sea.



Geochemistry in Petroleum Exploration

Author : Douglas W. Waples

Publisher : Springer Science & Business Media

Page : 233 pages

File Size : 21,3 MB

Release : 2013-12-01

Category : Science

ISBN : 9400954360

Get eBook

Book Description

This book is intended primarily as a textbook for geolo gists engaged in petroleum exploration. Its purpose is to introduce the reader to organic geochemistry and to show how to apply geochemistry advantageously in an explora tion program. I have made the explicit assumption that most readers will have a sound background in geology but far less knowledge of, or interest in, chemistry. Be cause there is no need for an exploration geologist to be an expert in organic chemistry, the amount of chemistry used in the book is rather modest. It is, however, often important for a geologist to understand some basic vocab ulary. The emphasis in this book is on applications of geo _chemistry to hydrocarbon exploration. Most of the analyt ical techniques are discussed only briefly, because although a geologist should know what a gas chro matograph is, he or she is unlikely to be asked to repair one. If more detailed knowledge does prove necessary, a laboratory is the proper place to learn. The strengths and weaknesses of the various analytical techniques are discussed so that a geologist will be able to anticipate pitfalls, cull bad data, and choose an appropri ate analytical program. On-the-job experience will prove invaluable in converting the basic information from this text into a practical working knowledge.