Version-1 (Nov-Dec-2015)
Version 1 Version 2 Version 3
- Citation
- Abstract
- Reference
- Full PDF
| Paper Type | : | Research Paper |
| Title | : | Resistivity Imaging of Shallow Sediments within University of Maiduguri Campus, Northeast Nigeria |
| Country | : | Nigeria |
| Authors | : | S. C. Alkali || A. A. Zarma |
Abstract: Electrical resistivity imaging within University of Maiduguri campus shows varying resistivity values and thicknesses for shallow sediments from one profile line to another. Sequence stratigraphy of the sediments indicates they were deposited at different times and varying conditions. Structure of the medium of deposition conditioned the lithological structures of the sediments. Basin or bowl-shapes of some resistivity structures are characteristics of some gravelly and clayey sediments. In most cases where such structures are encountered, gravels seem to host sands; while clays are located at the central parts. This situation may suggest that the sediments were deposited at the same time, where heavier ones settled to the bottom of the stratigraphy. Sometimes clayey sediments host sandy sediments; a situation that may be associated with different times of deposition.
[1]. Ayolabi, .E. A., Folorunso, A. F. and Idem, S. S., (2013): Application of Electrical Resistivity Tomography in Mapping Subsurface Hydrocarbon Contamination. Earth Science Research, Vol. 2(1), pp 93- 104.
[2]. Barber, W. and Jones, D. G., (1960): The Geology and Hydrogeology of Maiduguri. Geological Survey of Nigeria Records, 20 p.
[3]. Barber, W., (1965): Pressure Water in the Chad Formation of Borno and Dikwa Emirates, North East Nigeria. Geological Survey of Nigeria, Bulletin 35, 138 p.
[4]. Dey, A. and Morrison H. F., (1979): Resistivity Modelling for Arbitrarily Shaped Two – Dimensional Structures, Vol. 27(1), pp 106 –136.
[5]. Keller, G. V. and Frischknecht, F. C., (1966): Electrical Methods in Geophysical Prospecting. Oxford: Pergamon Press Inc.
[6]. Kumar, D., (2012): Efficacy of Electrical Resistivity Tomography Technique in Mapping Shallow Subsurface Anomaly. Journal Geological Society of India, Vol. 80 pp 304 - 307
- Citation
- Abstract
- Reference
- Full PDF
| Paper Type | : | Research Paper |
| Title | : | New Study on Reservoir Characteristics of the Macroscopic Heterogeneity-Example of BZ25-1S |
| Country | : | China |
| Authors | : | Yu Haitao || Ma Shizhong || Qian Fuyuan || Cao Yong || Zhang Yongwei |
Abstract: The heterogeneity of the reservoir refers to the basic properties of the reservoir (lithology, physical property, electric property and oiliness) in three dimensional space on the distribution of heterogeneity. Based on statistics of core and well log data, paramenters of variation coefficient and differential are calculated to carry out the study on heterogeneity of layer, interlayer and areal heterogeneity of Lower Member of Minghuazhen Formation in BZ25-1S area. The sand sets of BZ25-1S reservoir are mainly of distributary channel sand bodiesin delta plain, and the layer heterogeneity is medium. There are many barriers developed, and layer heterogeneity is relatively strong. In the plane,the reservoir heterogeneity in the distributary channel is strong, and it is weak in the overbank sand. It is considered that Lower Member of Minghuazhen Formation in BZ25-1S area is of strong heterogeneity.
Key words: BZ25-1S, Lower Member of Minghuazhen Formation，heterogeneity，Individual Sand Body.
[1]. Jingfu Shan, Yang Lu, Youliang Ji. Study on heterogeneity of sand body in thick channel sand body—Example of PI1-PI4[J]. Geological Prospecting Series, 2007(2): 125-130,151.
[2]. Yi Lu. Sedimentary Microfacies Study of BZ25-1S Oil Field of Lower Member of Minghuazhen Formation. Daqing Petroleum Institute, 2009-3-10.
[3]. Ling Xiao, Jingchun Tian, Qinlian Wei.etc.. Study on macro reservoir heterogeneity of You Fangzhuang Oilfield of Chang 2 Formation in Ordos Basin[J]. Sedimentary Geology and Tethyan Geology, 2006,26(2):59-62.
[4]. Wangshui Hu, Lan Huang, Ping Xiong etc.. Study on reservoir heterogeneity of Pucheng Oilfield of Sha 1 Formation[J]. Sichuan Journal of Geology, 2010,30(1):41-44
[5]. Yuanhao Li, Mingji Zhang,Xiujuan Wang etc.. Reservoir Forming Mechanism of Yanchang Formation of Triassic in northwest of Ordos Basin[J]. Lithologic Hydrocarbon Reservoir, 2010,22(2):32-36
- Citation
- Abstract
- Reference
- Full PDF
| Paper Type | : | Research Paper |
| Title | : | CVS vs. t2-x2 velocity analysis |
| Country | : | India |
| Authors | : | Anil Kumar Semwal || Naresh Agarwal |
Abstract: Velocity analysis is one of the prime aspects of seismic data processing. Velocity analysis is an iterative process and one keeps on improving subsurface velocity field at different stages of processing. These analyses require an initial velocity field, but in a virgin area, it is required, to estimate this, from the seismic data itself by employing CVS (Constant Velocity Stack) or t2-x2 methods. In the present context, we demonstrate using field data, that t2-x2 method based velocities are more reliable than CVS based velocities for the subsequent velocity analysis purposes.
Keywords:– Gather, mute, spectrum, stack, Velocity analysis.
[1]. Yilmaz Ozdogan, Seismic Data Analysis, (SEG, 2011) 283-284, 289-290.
- Citation
- Abstract
- Reference
- Full PDF
| Paper Type | : | Research Paper |
| Title | : | The study of fine reservoir characterization base on high precision seismic inversion prediction |
| Country | : | China |
| Authors | : | Mingxu Lu || Boyuan Zhang || Shoulun Zhang |
Abstract: According to the potential of fine adjustment in Daqing Oilfield in high water cut stage, this study meet in dense well network condition more high precision reservoir description requirements. The study area of reservoir II and III reservoir formation in Saertu oilfield, Daqing oil field is studied. Through the full investigation of the ideas and methods of the reservoir characterization, this study tries to improve the seismic attribute resolution by a variety of inversion methods, and thus a set of high accuracy seismic inversion and prediction of underground real situation is formed.
[1] Zhang, Tan Yundong. World shale gas resource potential and exploitation of the status quo and the development prospects of China's shale gas [J]. petroleum and petrochemical, 2009,03:9-12+18+49.
[2] Liu Zhenwu, SA liming, Zhang Xin, Shi Tai Dong, Ganley lamp. China petroleum seismic exploration technology application status and future development proposals. Acta petrolei Sinica, 2009,05:711-716+721.
[3] Lin Zhengliang, Wang Hua, Hong Jing Li, Jiang Huajun, Showtime, shu-e Zhao, CHEN Si. Earthquake sedimentology research status and progress [J]. Geological science and technology intelligence, 2009,05:131-137.
[4] Yu Xinghe, lishengli. Clastic rocks of oil and gas reservoir beds sedimentology of development and hotspot problem thinking. Acta sedimentologica Sinica.
- Citation
- Abstract
- Reference
- Full PDF
| Paper Type | : | Research Paper |
| Title | : | Reservoir Characteristics of Complex TightGas Reservoir for Second Member of YingchengFormation, Yingtai Area |
| Country | : | China |
| Authors | : | LIU Zhaolong |
Abstract: Second Member of Yingcheng Formation reservoir has strong anisotropy in Yingtai area. It is the complex tight gas reservoir with low porosity and low permeability, and the reservoir characteristics control potential distribution of target formation in study area and making development plans. Thus, this article carries out a research on sedimentary characteristics, lithofaciescharacteristics, lithological characteristics, characteristics of physical properties, distribution characteristicsof reservoir, and distribution characteristics of gas reservoir. Research results of Second Member of Yingcheng Formation indicate that: distribution of gas formation is controlled by the reservoir development level and physical properties, the higher level reservoir develops, the thicker thickness of gas reservoir is.
[1] HOU Qi-jun, FENG Zhi-qiang, LIN Tie-feng. Newdevelopment of oil and gas exploration in Daqingexploration area[J]. Petroleum Geology & OilfieldDevelopment in Daqing,2004,23(5):4-10.
[2] FENG Zhi-qiang,WANG Yu-hua,LEI Mao-sheng, etal.Exploratory techniques and their advancement ofdeep volcanic gas reservoirs in the SongliaoBasin[J].Natural Gas Industry, 2007,27(8):9-12.
[3] FENG Zi-hui, YIN Chang-hai, LIU Jia-jun et al. Formation mechanism of in-situ volcanic reservoirs in easternChina: A case study from Xushengasfield in Songliao Basin [J]. SCIENCE CHINA Earth Sciences, 2014, 57(12): 2998-3014.
[4] WANG Chuan-biao, SUN Yue-wu, XUE Yun-fei et al. Neogene palynological assemblages in the west slope of SongliaoBasin and their geological implications [J]. SCIENCE CHINA Earth Sciences, 2014, 57(10): 2486-2497.
[5] WANG De-hai, KANG Hai-ping, ZHAO Yan-wei et al. A study on accumulation and distribution of gasin southern Songliao Basin [J].Global Geology. 2013, 16(1): 35-42.
[6] CHENG Ri-hui, WANG Teng-fei, SHEN Yan-jie et al. Architecture of volcanic sequence and its structural control ofYingcheng Formation in Songliao Basin. Journal of Central South University:Science and Technology, 2014, 21(5): 2026-2040.
- Citation
- Abstract
- Reference
- Full PDF
| Paper Type | : | Research Paper |
| Title | : | Edge Detectionand Depth Estimation from Magnetic DataofWadi Araba,Eastern Desert- Egypt. |
| Country | : | Egypt |
| Authors | : | Saada Ahmed Saada |
Abstract: Edge detection, trend analysis and depth estimation techniques are very important steps in the interpretation of magnetic anomalies. In this paper, the Fast Fourier Transform was applied to showing the regional and residual sources. Trend analysis was carried out on the Reduced to Pole, regional and residual aeromagnetic maps to delineate the main tectonic trends dissected the study area. The edges of these sources is determined by using the tilt angle derivative and standard 3D-Euler deconvolution. The estimated Euler solutions was plotted on the tilt angle derivative map.
[1] N. Bournas and H. A Baker, Interpretation of magnetic anomalies using the horizontal gradient analytic signal. Annali di Geofisica44, 2001, 506-526
[2] V. E. Ardestani and H. Motavalli, Constraints of analytic signal to determine the depth of gravity anomalies. Journal of Earth & space physics 33, 2007, 77-83
[3] M. Arisoy and U. Dikmen, Edge Detection of Magnetic Sources Using Enhanced Total Horizontal Derivative of the Tilt Angle. Bulletin of the Earth Sciences Application and Research Centre of Hacettepe University 34, 2013, 73-82
[4] M. Pilkington, P. Keatin, Contact mapping from gridded magnetic data: a comparison of techniques. Exploration geophysics. 35, 2004, 206-311
[5] G. R. J. Cooper and D. R. Cowan, Edge enhancement of potential-field data using normalized statistics. Geophysics, 73, 2008, 1-4
- Citation
- Abstract
- Reference
- Full PDF
| Paper Type | : | Research Paper |
| Title | : | Reservoir Characterization of "G900" Sandstones Using Wireline Logs and Cores in Development Planning of Gabo Field, Onshore Niger Delta. |
| Country | : | Nigeria |
| Authors | : | Etimita Osuwake Omini |
Abstract:Wireline logs and cores are analysed to evaluate the quality of reservoir "G900" of Gabo field as insight for reservoir production optimization planning. "G900" have very good intergranular porosity and excellent permeability with the main reservoir fluid content as oil and water. "G900" sands are cleaner towards the North indicating relatively higher play potential. This clay rich subarkosic to arkosic sandstones is rich in quartz and albite with grain size that is fine to coarse, dominantly poorly sorted, platykurtic to mesokurtic with symmetrical to fine skewness..
[1] Morse, D. G., 1994. Siliciclastic Reservoir Rocks in Magoon, L. B. and W. G. Dow, eds., 1994, the petroleum system – from source
to trap. AAPG Memoir 60, pp. 121 – 139.
[2] North, F. K. 1985. Petroleum Geology.Unwin Hyman Inc., Winchester. p.5 – 53.
[3] Serra, O. 1985. Sedimentary Environment from Wireline Logs. Schlumberger. p.165 – 185.
[4] Avbovbo, A. A. 1998. Tertiary Lithostratigraphy of Niger Delta: American Association of Petroleum Geologist Bulletin, v.62,
p.295 – 300.
[5] Doust, H. and Omatsola, E. 1990. Niger Delta in Edwards, J.D and Santogrossi, P.A, eds, Divergent/passive Margin Basins. AAPG
Memoir 48: Tulsa, AAPG, p.239 – 248.
[6] Schlumberger, 1985. Well Evaluation conference, Nigeria. Schlumberger.p.37 – 135