EAGE Conference on Exploring the Synergies between Surface and Borehole Geoscience - Petrophysics meets Geophysics

A-32 FROM PICTURES TO PROPERTIES SYMBIOSIS OF PETROPHYSICS AND GEOPHYSICS M. PEETERS Colorado School of Mines 1500 Illinois street Golden CO 80401 USA ABSTRACT 1 Petrophysics and Geophysics have not always worked in the past as closely together as one might expect. This paper discusses current advances and sketches future developments. The major objective of Geophysical Research was to obtain sharper pictures. With the advent of 3-D seismic there is a strong trend to make displays both in time and depth and to convert seismic attributes into rock properties. Conversions based on seismic data alone give non-unique results due to

B-2 CALIBRATING SEISMIC DATA WITH WELL LOGS THROUGH MASSIVE SEISMIC MODELLING FRÉDÉRIK PIVOT NIRINA ANDRIAMASOARIVELO and YOUNESS ELOUAIR TotalFinaElf Scientific and Technical Center Route de Versailles 78470 St Remy les Chevreuse France. ABSTRACT 1 With improvements in acquisition and processing techniques new seismic data are now available for the geoscientist for seismic reservoir characterization: PP and PS cubes in prestack domain and also prestack inverted impedance cubes. In all these cubes fluid content saturation and porosity can have a major impact on the seismic response but layer thickness can also alter significantly the seismic signal due to tuning. We propose

B-4 INTEGRATION OF BOREHOLE INFORMATION WITH SEISMIC ATTRIBUTES AT THE TYPHOON FIELD DEEP WATER GULF OF MEXICO MICHAEL E. MURAT¹ and AKSEL L. QUINTUS-BOSZ² ¹Chevron Petroleum Technology Company 935 Graver Street New Orleans LA 70112 USA ²Chevron North America Exploration and Production Inc. Abstract 1 We show a case study integrating well bore geophysical measurements with seismic attributes to qualify the strength of direct hydrocarbon indicators (DHI’s). We applied this correlation to aid the evaluation of additional opportunities in the last phase of the appraisal of the Typhoon field. The study shows that there is a high degree of agreement

B-6 FLUID SUBSTITUTION ANELASTIC OFFSET SYNTHETIC GENERATION AND SEISMIC Q 1 ANTHONY N. FOGG Hampson-Russell Software Services Ltd. Grove House 551 London Road Isleworth London TW7 4DS UK Introduction This paper reviews three geologic regimes; onshore UK thin gas sands in coal cyclothems Permian Rotliegendes sandstones and onshore Alberta gas sands. Fluid substitution of the well logs has been performed for brine and gas scenarios and offset synthetic seismograms generated using elastic and anelastic algorithms. The impact of fluid change lithology type and wavefield type on the intercept-gradient stack seismic response are investigated. The investigation also focuses on Q (the

B-8 OPTIMIZING PETROPHYSICAL MODELING AND SEISMIC AMPLITUDE ANALYSIS USING A CONSISTENT HIGHLY INTEGRATED WORKFLOW PROCESS BRIAN O’NEILL and ALAN FUQUA Texaco Upstream Technology 4800 Fournace Place Bellaire TX 77401 USA Abstract 1 Specialists involved in seismic amplitude analysis are confronted with a wide array of data types petrophysicalmodeling methods and display capabilities. A high degree of interdisciplinary integration and organization are required to fully exploit this technical diversity. Proper modeling of ultrasonic shear-wave and compressional velocities is required to understand the interrelationship of rock mineralogy lithology porosity pore-fluid properties & distribution and how these properties vary with temperature and pressure.

B-10 UTILIZATION OF MULTI-AZIMUTH OFFSET VSP SURVEYS FOR RESERVOIR MAPPING – A CASE STUDY A.G. PRAMANIK V. SINGH P.K. PAINULY A.K. SRIVASTAVA and D.P.SINHA Oil and Natural Gas Corporation Ltd Geodata Processing and Interpretation Centre 9 Kaula Garh Road KDMIPE Campus Dehra dun-248195 India Abstract: 1 In Ramnad Sub-Basin of Cauvery Basin India Cretaceous sands of Nannilam and Bhuvanagiri Formations are the main hydrocarbon producers. In the study area the formation tops were mapped on the basis of available sparse grid 2D seismic data and fault closure prospects were delineated at both levels. In the southern part of the study

B-12 USING SLIM HOLE TOOLS TO QUANTIFY HYDRAULIC CONDUCTIVITY AND TO CHARACTERIZE WATER CIRCULATION IN A COMPLEX SATURATED POROUS AQUIFER PFYNWALD WALLIS SWITZERLAND INTRODUCTION The characterization of boundaries and hydraulic properties of the layers through which the water flows in complex saturated porous aquifers is only possible through numerous measurements in boreholes by using specific slim hole tools. Within the framework of the research project entitled « Fluid and mass transport in porous medium: quantification and comparison of hydrogeological geophysical and hydrochemical methods. Example of the alluvial aquifer in The Bois de Finges (Pfynwald Switzerland) » financed by the Swiss

B-14 INTEGRATING CONVENTIONAL LOGS CLUSTERING DIP-METER AND NMR FOR DEEP OFFSHORE TURBIDITIC FACIES CHARACTERIZATION R. AGUT¹ S. GOTTLIB-ZEH² S. MAREC¹ J.B. ROS¹ A. VEILLERETTE¹ Abstract 1 The Deep offshore field development requires a good reactivity in updating the geological model. The turbiditic facies characterization at the well is not obvious because the complexity of depositional and post depositional processes leads to a large variability of sand/shales organization: laminations debris flow high density turbidites hemipelagic shales bioturbation injections slumps… To do this an extensive coring program is strongly needed in a discovery and delineation phase but unrealistic for time and cost

B-16 ANISOTROPIC RESERVOIR CHARACTERIZATION (LAMINATED SANDS) USING ORTHOGONAL RESISTIVITY NMR AND FORMATION TEST DATA J. SCHOEN¹ D. GEORGI² and O. FANINI² ¹Joanneum Research Roseggerstrasse 17 8700 Leoben Austria ²Baker Hughes Abstract 1 Thinly bedded laminated reservoirs exhibit “macroscopic anisotropy” of physical properties including electrical conductivity and permeability. Macroscopic anisotropy occurs in thinly layered sedimentary formations where geologic processes deposit sediments in layers much thinner than logging tools can resolve. Generally there are two types of layering: - Laminated shaly sands. The sediments consist of thinly bedded sand-shale sequences. - Finely layered anisotropic sands. The fine layering gives rise to transverse