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71st EAGE Conference and Exhibition incorporating SPE EUROPEC 2009
- Conference date: 08 Jun 2009 - 11 Jun 2009
- Location: Amsterdam, Netherlands
- ISBN: 978-90-73781-67-2
- Published: 08 June 2009
101 - 150 of 585 results
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Wave Equation Multiple Modeling and Its Application to South China Sea Data
More LessThe South China Sea is the most extensive marine seismic survey area in China today. Because there exist various types of multiples with complex features in some seismic exploration blocks, one of the key challenges for marine seismic data processing is t
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Extension of MPI Scheme for the Internal-multiple Prediction
More LessIn this paper we extend the scheme of multiple prediction through inversion (MPI) from free-surface multiple prediction to the internal-multiple prediction. The MPI scheme builds the multiple model not by spatial convolution but by updating the attenuated
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Modified Multichannel Matching Filters for Seismic Multiple Attenuation
More LessIn seismic multiple attenuation, multichannel matching filters are used for multiple subtraction. In this paper, we change the conventional “neighbouring traces” constraints into the “neighbouring operators” constraints. The latter can trail off the depen
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On the Free Surface Assumption for Marine Data Driven Demultiple Methods
Authors M. O. Frijlink, R. G. Van Borselen and W. SollnerIn the past, integral formulations for marine data driven demultiple methods have been derived from reciprocity theorems. Two fundamental assumptions in these derivations were that the sea surface is flat and has a known reflection coefficient, often take
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Swell-noise Attenuation Using an Iterative FX Prediction Filtering Approach
Authors M. A. Schonewille, A. K. Vigner and A. J. RyderSwell noise is a common problem for towed streamer data. A straightforward approach to remove this noise, is to apply FX filtering to the frequency range where the noise is present, and replace noisy traces with their FX filtered versions for these freque
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ICA Separation for Improving Multiple Subtraction
Authors D. Donno, F. Rocca and E. LoingerThe suppression of multiple events is a crucial task in seismic data processing, and the removal of the predicted multiples from real data is recognized as one of the main challenges for the success of the SRME technique. The traditional least-squares mat
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The Use of Array-forming With or Without Other Filters Applied on Seismic Single-sensor Data
By I. PaneaModelling results showed that the effectiveness of the use of hard-wired arrays in the attenuation of the surface waves and aliased energy is lower comparing to that one provided by the combination of two algorithms, namely the standard array-forming and
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Surface Waveform Tomography Across the Arabian-Eurasian Plate Boundary, Zagros Belt
Authors N. Shad Manaman and H. ShomaliCompared with other more evolved plate boundaries, little is known about the deep lithospheric structure of Zagros belt, such as fate of subducted Neo-Tethys plate and existence of deeply earthquakes. We use the Partitioned Waveform Inversion method to im
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Structure and Development Stages of Chuya Earthquake Aftershock Process, Mountain Altai
Authors A. A. Emanov, A. F. Emanov, E. V. Leskova and A. V. FateevSpace-time structure of Chuya earthquake aftershock process is detailed understood, based on a study with temporal station network. Spatial components of aftershock area, divided by vertical slack zones and confined to different blocks of the Earth’s crus
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Elasticity Tensor Inversion from Spherical Sample Measurements
Authors A. Bóna, D. Nadri and M. BrajanovskiFrom the P-wave traveltime measurements over a spherical shale sample at 40 MPa we find the symmetry axis. We transform the ray velocities from the measurement coordinate system to the symmetry axis coordinate system. Assuming transverse isotropy symmetry
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Constraining Fracture Geometry from Shear-wave Splitting Measurements of Passive Seismic Data
Authors J. Verdon and J. M. KendallSeismic anisotropy can be caused by the presence of aligned fractures. The imaging of fracture sets using anisotropy is a valuable tool for guiding drilling strategies. Shear wave splitting (SWS) is probably the most unambiguous indicator of anisotropy. C
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Geology and Petroleum System of Pishin Basin, Pakistan
Authors R. A. Saddique and R. AhmadIn Pishin frontier basin of Pakistan, there could be a high potential for Tertiary petroleum system to be effectively operating in the same manner as in the Burma’s Irrawaddy basin. The basin owes its origin after the subduction of Indo-Pak plate under th
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Middle Caspian Mesozoic Petroleum System – Terrigenous Source-Rocks and Carbonate Reservoirs
More LessDepositional environment change through out Jurassic - Cretaceous within western flank of the Middle Caspian basin (the Plain Dagestan in the north, coastal Premountain Dagestan and north-east Azerbaijan) was one of the main controls on the accumulation
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Zechstein Petroleum System in the Western Pomerania, NW Poland
Authors P. Kosakowski, M. J. Kotarba and M. WrobelThe Western Pomerania is located in northwestern part of the Polish Permian Basin. The Main Dolomite source rocks reveal poor to fair, and locally very good to excellent oil-source potential.. The maturity of oil-prone organic matter (type II kerogen) ran
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Paleozoic Source Rocks in the Dniepr-Donets Basin, Ukraine
Authors R. F. Sachsenhofer, A. Bechtel, D. Reischenbacher and V. A. ShymanovskyyThe Dniepr-Donets Basin (DDB) is a major hydrocarbon province in eastern Europe. Moreover organic-rich sediments in the DDB may offer a shale gas potential. However, only limited data on source rocks are available. Within the frame of the present study, a
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Hydrocarbon Entrapment in the East of the Moesian Platform
Authors C. Pene, B. Niculescu and O. ColtoiThe correlation of some seismic profiles and well data helped to derive a tectonic model and a hydrocarbon generation model for the eastern part of the Moesian Platform. The particular feature in the study area is the hydrocarbon entrapment especially in
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Three-dimensional Structural Modelling in the Swiss-French Jura Mountains
Authors C. Turrini and K. DupsThe Jura Mountains represent the external domain of the north-western Alps. Thrusted folds, related to a basal detachment surface at the base of the Triassic, are the main structures in the region. The derived outcropping structures define a clear ENE-WSW
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Timing and Extent of Petroleum Processes in Lower Paleozoic Petroleum System in Western Part of the Baltic Basin
Authors M. Wróbel, M. J. Kotarba and P. KosakowskiThe late Paleozoic stratigraphic section is the most oil-producing system in the Baltic Basin, with more then 40 years history of petroleum exploration and production and still remains a very active exploration area. The hydrocarbon potential of the Balti
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Investigating a Relationship of Elastic Wave Velocity vs. Temperature of Rocks Containing Heavy Oil
Authors A. E. Sobolev, M. V. Chertenkov, A. A. Alabushin and A. N. KasimovHeavy oil production thermal methods and, first of all, steam injection are considered as traditional methods. Whereas the technology of steam influence on a bed is rather power-consuming and demands large material cost, there is a need to control the pro
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Estimation of Azimuthal Anisotropy from VSP Data Using Multicomponent Velocity Analysis
Authors R. Pevzner, B. Gurevich and G. DuncanObservation of azimuthal shear wave anisotropy can be useful for characterisation of fractures or stress field. Shear wave anisotropy is often estimated by measuring splitting of individual shear-wave events on VSP data; however this method may become un
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Identification and Classification of Carbonate Reservoirs Using Cross Dipole Acoustic Log
By S. DobryninA possibility in principle is shown of a wider use of well-defined (corrected for wellbore shape) data of azimuthal velocity anisotropy caused by ordered near-vertical fracturing. The suggested formal classification of complex-structure carbonate reservoi
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Two Triaxial Induction Tools – Sensitivity to Radial Invasion Profile
More LessA 3D finite-difference (FD) modeling approach is used to simulate responses of two different triaxial induction tools in 3D media. The high efficiency of the code, due to the use of the optimal grid and material averaging, allows one to use it routinely f
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Theoretical Analysis and Application for Borehole Wall Stability Based on Stress Field
Authors T. Y. Liu, X. J. Liu, J. Yan, Z. T. Ma and Y. F. HuangThe collapse of borehole wall is a serious problem in oil/gas drilling due to sand production and breakout. A borehole with poor wall may lose any value to drill deeper, and the investment has spent in this well became entirely worthless. Since the collap
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Quantification of Overpressures – A Comparison of Commonly Used Techniques
Authors A. Bartetzko, S. Wessling, J. Pei, T. Dahl and M. M. ReeseThe knowledge of pore pressure is of critical importance to the oil industry as overpressure may result in severe drilling problems. Numerous methods have been published over the years to quantify the pore pressure. Here, we compare some widely used metho
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The Evaluation of Seismic Velocity Field in Shallow Zone With the Use of Detailed CSAMT and Gravity Survey
Authors M. Wojdyla, M. Stefaniuk, P. Targosz and E. MajDetailed CSAMT and gravity survey were made along 17 km long reflection seismic profile located in the Eastern Pommerania. The main aim of the survey was recognizing of the structure of the shallow zone of geological cross-section for supporting and suppl
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Bayesian Approaches to Resolution in CSEM
Authors J. S. Gunning and M. E. GlinskyInversion of CSEM data is a challenging problem for at least two reasons. (1) The inverse problem is significantly nonlinear in the subsurface resistivity parameters, and (2) very poor scaling results from the strong absorption of the incident EM energy.
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3D Focussing Inversion of Multi-transient EM Data in the Frequency Domain
Authors B. A. Hobbs, G. Li and J. LinfootWe have produced an inversion code for frequency-domain controlled source EM data based on the 3D MT focussed inversion method developed by the Consortium for Electromagnetic Modelling and Inversion (CEMI). Broad-band frequency-domain data are easily dete
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Joint Anisotropic Inversion of MT and CSEM Data Using a Multiplicative Error Functional
Authors C. Shen and R. E. PlessixControlled source electromagnetic (CSEM) and magnetotelluric (MT) data can provide complementary information on the resistivity distribution of the subsurface: MT data generally carry regional background resistivity information and CSEM data are sensitive
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A New Coarse-to-fine 3-D Magnetotelluric Inversion Method – Application to Field Data for Hydrocarbon Exploration
More LessFull three-dimensional (3-D) inversion of magnetotelluric (MT) tensor has a great potential for the characterisation of complex geological structures at different scales. We developed a simple and robust 3D MT data inversion method based on the coarse-to-
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Electric Permittivity Hysteresis Measurements During Drainage and Imbibition of Salt Water in a Three-layer Sand
Authors M. Kavian, E. C. Slob and W. A. MulderWe measured the electric permittivity of a three-layer unconsolidated sand as a function of frequency, water saturation, and salinity. To ultimate objective is to determine if the effect of heterogeneities at scales much smaller than the skin depth can be
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Converted-wave Analysis Applied to Rulison Field, Colorado
By A. AramanConverted-wave analysis show that the reservoir interval in Rulison Field, Colorado, has to be modelled as an anisotropic medium. Anisotropic maps based on two-way traveltime measurements from pure shear-wave data and from converted-wave data show that t
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On-land Converted Wave Static Correction
More LessStatic correction is a prominent problem for the converted wave exploration. We still have not fully developed applicable techniques for the real applications. The static correction to the converted wave is facing more difficulties than that to P waves, a
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Deconvolution of Multicomponent Seismic Data by Means of Quaternions – Theory and Preliminary Results
Authors G. M. Menanno and A. MazzottiWe propose a quaternion approach to the deconvolution of multicomponent seismic data employing the well known method of Wiener statistical deconvolution. The extension to quaternions is straightforward, but we show that special care must be put in the alg
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Reducing the Uncertainty in Parameter Estimation and Data Processing of PS Converted Waves
More LessWe developed a simplified approach to reduce the uncertainty in parameter estimation and data processing of PS converted waves. This is archived by using a simplified PS-wave moveout. In this moveout. a combination parameter is used to replaced the vertic
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P- and SV-mode Separation in Complex Geology with VTI Anisotropy
More LessThe separation of wave modes from isotropic elastic wavefields is typically done using Helmholtz decomposition. However, Helmholtz decomposition using conventional divergence and curl operators in anisotropic media does not give satisfactory results and l
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Imaging the Exploding Converter with Elastic Propagators
Authors B. W. Artman, I. Podladtchikov, A. Goertz, B. Steiner and E. H. SaengerSince the Earth is elastic, it is worth the computational burden to process multicomponent data for elastic phenomena with fully coupled time-domain wave-equation propagators. At every time sample in the back-propagated model domain, the complete wave fie
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When Single-station SVD-polarization Filtering Is Effective and How It Compares to Multi-station Procedures
By O. TiapkinaThe use of multi-component data acquisition enhances the potentialities of seismic processing and interpretation due to involving information on the polarization of recorded waves. Specifically, it provides the geophysicists with additional information on
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Eliminating Marine 4D Positioning Errors – How Close Are We? A North Sea Case History
Authors G. Brown, J. O. Paulsen, A. Thompson, C. Jones, A. Wilson and M. MillingtonWe present a North Sea 4D acquisition case history that achieved very high repeatability as a result of detailed planning and the use of a new automated and integrated vessel, source and receiver control system. The new control system virtually eliminates
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Controlled Source Strength Variation by Changing the Firing Pressure – A Sensitivity Study for 4D Calibration
More LessA direct way to calibrate 4D signals is to gradually change the source strength, and detect the sensitivity threshold for a given subsurface reflection. However, varying the source strength in a controlled manner by changing the firing ressure of an air g
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Characterization of the Eratosthenes Seamount Offshore Cyprus Using Dual-sensor Streamer Technology
Authors O. Lie and P. H. SembIn 2006 PGS acquired the first part of a large non-exclusive 2D survey using a conventional streamer to prepare for the first licensing round offshore Cyprus. In 2008 a new survey infilling the 2006 survey was acquired using dual-sensor streamer technolog
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Weathering Reflection Survey (WRS) Method for Statics Computation in Desert Operations
Authors F. Martin, B. Blake, C. Colombo and F. ElagrariStatic computation in vibroseis acquisition in desert areas commonly use up hole surveys to support effective statics computations. Such surveys are very expensive if the sampling requirements of one up hole per cable length are met to provide the low
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A New Method for Analyzing Vibroseis Harmonics Based on Overloads Statistics
Authors D. L. E, Y. Z. Guan, M. G. Zhang, S. L. Guo and H. R. YangHarmonic distortion is an intrinsic problem of vibroseis. There are several indistinct possibilities for the harmonic source. We have concluded that there are two types: an internal factor caused by the mechanical system and an external factor due to grou
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Depth-velocity Modelling and Imaging with Azimuthal Anisotropy in an Onshore Middle Eastern Field
Authors S. Birdus, E. Angerer, I. Abassi and K. ShamisSeismic data moveout on a full azimuth land 3D dataset revealed strong spatially variant azimuthal anisotropy. It was interpreted as a result of short-wavelength heterogeneity and true azimuthal anisotropy for the interval velocity. Iterative depth-velo
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Acquiring and Processing a Full-azimuth 3D Land Seismic Survey in Kuwait
Authors G. R. Rached and B. Al-AjmiThe assumption that long offsets with wide-azimuth geometries enable better multiple elimination than narrow-azimuth geometries was one of the main reasons for acquiring the first full-azimuth 3D land survey in Kuwait. Other reasons were to enable reservo
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Azimuthal Seismic Pilot for Fault and Fracture Detection – An Abu Dhabi, U.A.E. Case Study
Authors K. W. Mueller, M. S. Al-Nahhas, W. L. Soroka, M. N. A. Al-Baloushi, R. Sinno, R. Martinez, W. Hussein and P. LeCocqAn azimuthal processing pilot study was carried out in a large Middle East Field to evaluate if this technology has the potential to successfully identify fracture permeability pathways. The field is heavily faulted and fractured with good well control an
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Converted-wave Imaging in the Flin Flon Mining Camp, Canada
Authors M. Malinowski and D. WhitePP and PS sections have been produced for high-resolution 3-component data acquired for the purposes of mineral exploration in the Flin Flon mining camp (Canada). The PS sections show potential as a complementary source of information to the PP images and
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Geodynamical Events (Coal-and-Gas Outbursts) in the Donets Basin, Ukraine
Authors O. A. Panova, V. A. Pryvalov, A. Izart, D. Alsaab and A. V. AntsiferovOptimization of production and effective management of mining hazards are in large part dependent on knowledge of geological, particularly structural properties of the mining medium. Over the past decade in the Donbas 1550 gas-geodynamic events, including
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Imaging Fault Structures for Hydrothermal Use in the Upper Rhine Graben
Authors H. M. Rumpel, P. Schlüter and H. BunessThe ratification of the European Renewable Energy Act ensured a stable economic basis for the development of geothermal projects in Germany. Hydrothermal reservoirs are present in the North German Basin, the southern German Molasse Basin and the Upper Rhi
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Iberian Crustal Stress Field and Temperatures Assessed from Tectonic Studies – Meaning for Geothermal Exploration?
Authors J. Juez-Larré, D. D. P. Bonte, J. D. van Wees and G. de VicenteGranite rocks are considered a prime target for EGS (Enhanced Geothermal Systems) as they are marked by high geothermal gradients, caused by radiogenic heat production, and are well suited to be used for geothermal doublets using hydraulic fracturing. Cri
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High Resolution Temperature Models for Geothermal Exploration – Methods and Application to the Netherlands
This paper focuses on high resolution temperature models for temperature prediction in mature oil and gas basins. Besides well and log data, numerical thermal basin modelling is required to predict subsurface temperature. For detailed 3D models (i.e. invo
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