The nonlinear well log and seismic data integration for reservoir characterization. Reservoir modeling by integrating well log, geologic, seismic, and. Interpretation of wireline log data for reservoir characterization of the. An ebook reader can be a software application for use on a. Fill the gaps between wells 28 cores 1600 wells 108 million cells log datum terminology kb kelly bushing elevation. In present paper, petrophysical evaluation of well log data from cluster of six wells in the study area is carried out in combination with rock physics modeling for qualitative and quantitative characterization of eocene reservoir in chandmari oil field of assam. Support reservoir characterization with formation imaging interpreted by domain experts. This study reveals the petroleum potential and attempt to make available petrophysical results for the various reservoirs in three 3 selected wells as these results will help enhance the proper characterization of the reservoir sands. Sands do not have a clear acoustic impedance signature allowing them to be differentiated from other lithologies. Petrophysical data analytics for reservoir characterization.
Welllog and seismic data integration for reservoir. Predict facies in wells without core, but with good logs 4. Our experienced petrophysical staff use cutting edge technology to analyze and condition well logs for optimal characterization results. Pdf reservoir characterization using seismic and well logs. Knowing the lithology through the identification of sand units from chosen top sand to the last hydrocarbonbearing sand, using gamma ray log. The electrical resistivity log as an aid in determining some reservoir characteristics. Lom is usually obtained from sample analysis where the vitrinite reflectance r o % method is commonly used for the purpose. Different types of gamma ray gr, spontaneous potential sp, resistivity, neutron and density log are helped to define physical characteristics of the reservoirs. Pore networks, grain size characteristics, and mineralogy can be analyzed by routine thin section petrography as well as by xray diffraction, scanning electron microscopy, capillary pressure measurements, and petrographic image analysis see reservoir quality. This model, proposed by beicip franlab to sonatrach, has been in use since 1995 for well positioning. Keywords petrophysics rock physics well log data analysis reservoir characterization assamarakan basin introduction superior quality well log data are essential for the highquality seismic reservoir characterization because well log data are routinely used for wavelet estimation, low frequency model building, seismic velocity calibration, and. Reservoir characterization utilizing the well logging analysis of abu madi formation, nile delta, egypt. The results of the analysis revealed a total number of 23 reservoir sand units in well one, 7 reservoir. Petrophysical evaluation of well log data and rock physics.
Pdf reservoir characterization using seismic and well. A detailed petrophysical analysis blended with rock physics modeling have been carried out for reservoir characterization of chandmari oilfield in. Maximize the value of your well tests with optimized design. Facies analysis by classifying reservoir sands and their depositional environment from the log. Through this fluid characterization, oilbearing thin sand layers have been found in well e including well d.
Well log analysis for reservoir characterization aapg wiki. The outcome of this study is to characterize the reservoir using well logs. From the seismic attribute studies and well log analysis the estimated thickness of the reservoir zone is about 12. Wireline logging provides various recordings of subsurface formation properties and well logs are the main sources for petrophysical analysis. Well log cluster analysis and electrofacies classification. Reservoir characterization in o field in the niger delta using oil well log data i. Well log analysis and reservoir characterization using picketts plot modeling from equation 9, by plotting rt vs. An interdisciplinary seminar for all earth scientists and engineers giving practical understanding of the principles and interpretation of geophysical well logs in research applications. The petrophysical evaluation of the late miocene abu madi formation were accomplished based on the open hole logs of eighteen wells in abu madiel qara gas fields, onshore nile delta, egypt.
The maps resulting from the seismic reservoir characterization were then used as a guide for gde maps construction. We will meet once a week and focus on the fundamentals of well logging methods, including electrical. The petrophysical characterization models must correspond to the elements and their behavior of carbonated naturally fractured reservoir, reason why they are useful in the obtaining of petrophysics parameters because the exact relations between the characteristics of the rock often do not exist due to. Formation evaluation can be generally defined as the practice of determining the physical properties of rocks and the fluids that they contain. Thus, it can be generally applied to both clastic and carbonate reservoirs in multi well contexts. Interpretation of wireline log data for reservoir characterization of the rashidpur gas field, bengal basin, bangladesh.
Seismic attribute, reservoir characterization, thickness and porosity introduction seismic attributes have been increasingly used in both. Reservoir characterization provides critical information on the threedimensional distribution and realization of the reservoir heterogeneity and petrophysical. Analysis of all or most of these properties is essential for adequate reservoir. Petrophysical evaluation of uzek well using well log and. The final solution is a probability density function pdf for porosity for each cell of the. Intelligent information processing ii reservoir characterization. Practical reservoir engineering and characterization 1st. Integrated reservoir characterization for unconventional. Reservoir characterization utilizing the well logging analysis of abu. This approach is better than conventional techniques for well logging interpretation that cannot.
The sources of information are prestack seismic data. A manual interpretation of lithology of the uzek well was undertaken using all the. Petrophysical evaluation of well log data and rock physics modeling. Petrophysical analysis is critical in a reservoir study because it provides a primary source of input data for integrated reservoir characterization and resource evaluation. Reservoir characterization rc is a process of finding petrophysical properties of the subsurface mainly from the seismic and well log data. Available well logging data temperature profiles, dual neutron logs.
Reservoir characterization of hydrocarbon reservoirs using well logs have been. Petrophysical evaluation of well log data has always been crucial for identification and assessment of hydrocarbon bearing zones. It is arranged by the interpretation goals of the data, rather than by the underlying physics of the measurements. Reservoir studies using seismic attributes and well log and well log analysis of y field, niger delta adiela, u. The discrete thin sand reservoirs have been delineated through the rpt analysis. This is the process used to identify the potential for oil production at a given source. The petrophysical evaluation of the late miocene abu madi formation were accomplished based on the open hole logs of eighteen wells in abu madiel qar a. It overcomes the limitation of the bulk volume water method which is only applicable to reservoir zones that. Pdf petrophysical analysis of well logs for reservoir. An integrated 3d seismic data, checkshot data and a suite of well logs for four wells located at the lona field, niger delta were analysed with petrel software for reservoir characterization and. Reservoir characterization is an integral part of the formation damage assessment and mitigation tasks, because the magnitude and the extent of the reservoir formation damage are greatly influenced by the reservoir formation properties. Ilukhor1 1ambrose alli university, ekpoma, nigeria. Home reservoir characterization rock and fluid analysis core analysis petrophysics services. Based on this correlation and detected electrofacies information, we can generate reservoir properties of each cell.
Pdf intelligent well log data analysis for reservoir. Practical reservoir characterization expertly explains key technologies, concepts, methods, and terminology in a way that allows readers in varying roles to appreciate the resulting interpretations and contribute to building reservoir characterization models that improve resource definition and recovery even in the most complex depositional environments. Acoustic impedance of reservoir is estimated by inversion of each seismic trace, and it is linked to correlation analysis with well log data. We deliver characterization models incorporating all the characteristics of the reservoir that are pertinent to its ability to store and produce hydrocarbons, including petrophysics, geology, geomechanics, and. Reservoir characterization in o field in the niger delta. Petrophysical analysis of well logs for reservoir evaluation.
The wireline log data were studied to characterize the porosity, water saturation, volume of shale of the xfield reservoirs. Determination of reservoir depth and thicknesses in the well. During analysis, hydrocarbon saturation in relatively unconsolidated sandstone reservoirs is a pore fluid property that has been successfully mapped using seismic surveys. We deliver characterization models incorporating all the characteristics of the reservoir that are pertinent to its ability to store and produce hydrocarbons, including petrophysics, geology, geomechanics, and geophysics. The presence of hydrocarbon typically lowers the seismic velocity and density. Well log is one of the most fundamental methods for reservoir characterization, in oil and gas industry, it is an essential method for geoscientist to acquire more knowledge about the condition below the surface by using physical properties of rocks. The petrophysical evaluation of the late miocene abu madi formation were accomplished based on the open hole logs of eighteen wells in abu madiel qara. Well log analysis for reservoir characterization aapg wiki slideshare. P1 and oyekan hafeez kayode 2 1department of petroleum engineering, nigerian agip oil company, port harcourt.
Geotesting geologybased well test design and interpretation services. Reservoir characterization using seismic and well logs data a case of study. Integrated data analysis using electrofacies and seismic. Bayesian reservoir characterization crewes research report s volume 14 2002 1.
Reservoir characterization using seismic and well logs. Five hydrocarbon bearing reservoirs were delineated in well 1, four in well 2. Electrofacies in reservoir characterization springerlink. The well log types used for quantitative analysis include resistivity, density and neutron logs. The reservoir is considered a volume composed of cells. Integrated reservoir characterization for unconventional reservoirs using seismic, microseismic and well log data. Reservoir characterization an overview sciencedirect. Reservoir characterization utilizing the well logging. It is well recognized that improvements in reservoir characterization will. The reservoir pay sand thickness map of the study area has also been derived from rpt analysis and fluid characterization.
Well log analysis and reservoir characteriza tion using. Advances and challenges of reservoir characterization. Rock physics template rpt analysis of well logs and. Relating log character to sedimentary facies building a reservoir model model 1. Integrated reservoir characterization helps resolve.
An integrated interpretation of seismic and well log data over y field in the niger deltaarea of nigeria was carried out with the aim of characterizing reservoir rocks using quantitative seismic attributes and petrophysical properties. Objectives to give an insight in the basic well logging methods used to derive petrophysical properties for hydrocarbon exploration. Pdf well log data analysis plays an important role in petroleum exploration. Article info abstract the purpose of this study was to decipher some petro physical properties of studied wells in halewah oilfield, block5, maribshabwa basin, yemen. Pdf intelligent well log data analysis for reservoir characterization. A study for the characterization of hydrocarbon reservoirs using well logs have been carried out in the niger delta in order to evaluate the fields hydrocarbon prospectivity, delineate hydrocarbon and water bearing zones and petrophysical properties. Seismic attribute analysis for reservoir characterization. The aim of the previous studies was to define the exploitable representation of the reservoir characteristics evolution, and to help decide where new horizontal and vertical wells should be drilled. It is used to identify the potential for oil production at a given source. Aapg methods in exploration series, 28, 244pp incl cd. Reservoir studies using seismic attributes and well log.
Pdf petrophysical evaluation of the upper and lower shaly gas sand reservoirs of the sahara field, using conventional well log interpretation. Petrophysics understanding well log measurements and properly calibrating all available data is a critical step in characterizing a reservoir. Petrophysical analysis in reservoir characterization. Pdf petrophysical analysis in reservoir characterization. Basic well log analysis is a general introduction to common openhole logging measurements, both wire line and mwdlwd, and the interpretation of those measurements to determine the traditional analytical goals of porosity, fluid saturation, and lithologymineralogy. Reservoir characterization especially well log data analysis plays an important role in petroleum exploration. Petrophysical characterization of carbonate naturally.
1503 1293 263 1157 1272 149 98 922 455 76 1381 412 1475 1219 34 424 1140 650 1007 259 1392 1510 292 1017 455 1249 1344 467 837 731 1338 1154 854 426 1529 66 1322 850 1169 886 1241 492 1092 843 64 1154