- Home
- Conferences
- Conference Proceedings
- Conferences
5th EAGE St.Petersburg International Conference and Exhibition on Geosciences - Making the Most of the Earths Resources
- Conference date: 02 Apr 2012 - 05 Apr 2012
- Location: Saint Petersburg, Russia
- ISBN: 978-90-73834-23-1
- Published: 02 April 2012
161 - 178 of 178 results
-
-
Classification of the Reservoir Rocks and their Key Properties Optimal for Improved Oil Recovery Using Radial Drilling
Authors T.N. Jafarov and N.E. SeitovaThe radial jet enhancement is relatively new technology and the applicability for different rock types should be learned. In this research work the various rock formation types which are most suitable for radial jet enhancement are will be addressed. There are will be described cases when the composition of these rocks are clear or there are various impurities which may affect porosity and permeability of the rock formations. According to the results of the study and analysis of different kinds of the rock formations under the different conditions the table is created which shows the applicability of the radial drilling technology for various types of the rock their conditions and states.
-
-
-
Formula to Calculate the Definite Point Overburden Pressure of Earth Layers Using Experimental and Field Data
Authors M. Karimi and M.R. AdelzadehThe classified parameters in three tables of inter-granular distance (IGS), inter-fracture space (IFS) and fracture width (FW) have been defined for the reservoir layers which have endured the pressure of upper layers. These structural parameters are applicable in other equations in acidizing, stimulation, drilling in other references The classifications are designed based on a total survey on the various characteristics of reservoir cuttings and core samples by the method of macroscopic and microscopic, at which the characteristics such as the size and situation of particles, color, the percent of clay, qualitative and quantitative examination of porosity and permeability, the property of consolidating and un-consolidating of layers with tests of static and dynamic at laboratory and wellhead using the tin sections and whole plugs in different sectional areas. On the other hand, the effect of Viscosity that has been related empirically and experimentally to overburden pressure by the density of fluids, time, and weight of fluids included in equations can approach/highlight the properties between fluid and rock. The proposed formula is derived in framework of fluids displacement process in laboratory and geological elements in field dimensions, and is applicable in reservoir engineering, reservoir geology and geophysics.
-
-
-
Geophysical Characterization of Subsurface Layers, Soil Competency and Corrosivity at Iganran South-west Nigeria
Authors G.O. Mosuro, M.O. Oloruntola and O.O. BayewuElectrical resistivity investigation involving Schlumberger electrode array was carried out in the study area. Interpretation was done by curve matching and 1D computer iteration software. Two to four lithological sections were inferred from the study areas. These are the Top soil, Lateritic Horizon, Clayey/sandy clay Horizon, and Weathered/Fresh Basement. The thicknesses of these horizons vary from 0.4-1.5m, 0-17.5m, 0 -39.1m for the top soil, lateritic layer and the clayey/sandy clay horizon respectively. The resistivity values range from 15.2-1,700 Ohm-m for top soil, 271-2,769.1 Ohm-m for lateritic horizon, 1.8-197.4 Ohm-m for the clayey/sandy clay horizon, and 337-15,300 Ohm-m for the weathered/fracture/fresh basement. The various lithology units of the subsurface, soil competency and soil corrosivity level for the depths at 1m, 2m and 5m have been identified from the resistivity values. This study serves as basis for further engineering investigation for the design and construction of the proposed buildings and has shown the relevancy of the application of geophysics to civil engineering work. The cost of the investigation also adds to the advantage of this approach when compared to what it would have cost to drill several boreholes and conduct laboratory tests.
-
-
-
Why to Dispose,When We Can Reuse
By R. KumarThere is a large volume of water produced along with the methane gas in CBM production which has significant effects on environment. The main aim of my paper is to increase the understanding of different objectives of water management (treatment and usage) of treated water in cost effective and environmentally accepted ways. To achieve this objective I have analysed about the various effluents that are present in the produced water, their impacts on the ecosystem and the challenges associated in the treatment process.
-
-
-
Synchronized Exploration and Production of Coal Bed Methane with Oil & Natural Gas by the Application of Remote Sensing
More LessBy the analysis of thematic mapping data of Cambay, Cauvery, Barmer petroleferous basins and the Jharkhand area in India, it is observed that the values of L_λ and T_R of Cambay, Barmer & Cauvery basin are almost same as that of Jharkhand area. It is known that Jharkhand area is covered with coal seams. So, from this observation it can be implied that In India, scope for simultaneous operations for CBM and oil and natural gas exploration/production in the existing areas i.e. Cambay basin (Gujarat), Barmer Basin (Rajasthan) and Cauvery basin (Tamil Nadu) wherein both CBM and Oil & Natural Gas occur in the same basinal areas. As far as technical feasibility and horizontal/vertical separation of CBM operations and Oil & Gas operations are concerned it is very well established that both operations could be carried out simultaneously. However, certain broad guidelines and procedures may have to be followed in this endeavor. In case CBM and oil and natural gas formations are separated by lithological column of sufficient thickness between the two horizons, exploration of CBM and natural gas from the same area could be carried out simultaneously by two different operators or by the same operator.
-
-
-
A New View of the Theory of Oil and Coal Deposits Formation
Authors M. Zhumabekov, R. Dzhumagaliev, A. Dyusengalieva and G. TaumanovaA finding fuel and energy reserve is one of the pressing problems of the modern world. It is of great importance given the rise in the global demographic indicators. At the same time, this raises a question of the theory of their formation. The main objective of this work – to conduct exploratory work on the structures formed as a result of geological activity flowing rivers, i.e. in the canyons, catacombs, caves and peninsulas, as well as in swamps, waterfalls and in forests, on the basis of scientific writings and assumptions of great scientists such as D.I. Mendeleev, V. Zhukov, I.M. Gubkin and M.V. Lomonosov. In this research work we put forward a new theory about the formation of petroleum and coal deposits, which is related to geological activities of flowing rivers.
-
-
-
Effect of Salinity on the Interfacial Tension of Crude Oil
Authors B. Kumar, H. Yarranton and E. BaydakFor a hydrocarbon accumulation to exist in nature, one of the most important requirements is the presence of a seal or cap rock that prevents migration of oil and gas to other place. Although not necessary, the seals are usually made up of shale rocks. The small capillary pores of shales disallow oil and gas to pass through them and act as a seal for their commercial accumulation. The height of hydrocarbon accumulation depends on the strength of these shale rocks. The strength of these shale rocks depends on their capillary entry pressure. The capillary pressure depends on the interfacial tension between oil and saline reservoir water. An estimation of this IFT will allow determination of hydrocarbon column length in the subsurface. This paper develops a model to predict IFT between crude oil and saline water. The work has been completed in three phases. First a model is developed for pure hydrocarbon in the presence of salt. In the second stage, surfactant is added to the system. Finally, model is constructed to predict IFT of crude oil versus water, in the presence and absence of added surfactants.
-
-
-
Analysis of Developing Offshore Fields in the Russian Continental Shelf
By K. BulaevaThe integrated approach enables flexible schemes to be devised for the rational development both of explored fields are to be discovered in the future and makes developing small fields attractive in the Russian continental shelf
-
-
-
Risk Analysis & Economic Geology
More LessIn this work on the basis of cartographic material and various geological resources the Petroleum Play Analysis based on the results of calculating the probability of the Total Prospect Risk has been made in order to identify not yet explored prospective petroleum areas in the Pre-Caspian basin. The Pre-Caspian Basin is one of the major oil and gas provinces of the world with its unique geological structure and rich petroleum potential. Proved oil and gas vertical range covers deposits from the Middle Devonian to Neogene inclusive.
-
-
-
Accurate Hypocenter Determination in Lesser Antilles Region from the Sismantilles I Experiment
Authors R. Raffaele, M. Sapin, M. Laigle, L. Scarfì, P. Charvis, J. Diaz and S. ImposaIn this study, we present results of the investigation programme SISMANTILLES I, conducted from November 1999 to January 2002, on the Lesser Antilles Arc. We analyzed seismicity by using the data recorded by a combined on- and offshore network that integrated the local volcano-seismological observatories of the Institut de Physique du Globe de Paris (IPGP). The SISMANTILLES I landward network comprised 43 three-component temporary stations. To improve azimuth coverage in earthquake location, it was complemented by 31 OBS. A data-set of 155 well located earthquakes has been used to study the relationship between tectonic structures and seismicity. In particular, to obtain precise hypocenter locations, we applied the concept of minimum 1D model which incorporates the iterative simultaneous inversion of velocity and hypocenter parameters. To partly estimate the huge structural heterogeneity of the Lesser Antilles Subduction Zone, the minimum 1D model is complemented by station corrections which take into account near surface velocity heterogeneity. The relocated hypocenters improve our knowledge on the subduction zone since they have smaller uncertainties with respect to the permanent array locations. The vertical depth sections, perpendicular to the arc, will help define the slab structure and the dip angle.
-
-
-
Structural & Stratigraphic Interpretation of Migrated Seismic Sections of Fortabbas Area, Punjab Platform, Pakistan
More LessPunjab Platform in Pakistan covers an area of 70,000 sq. km, lies at the edge of Pakistan India political boundary, which is sparsely explored for petroleum research. Punjab Platform is a westward dipping gentle monocline containing Paleozoic to Paleogene sediments overlain by Neogene fluviatile deposits. In this study we used five migrated seismic stacks with three strike lines and two dip lines acquired by OGDCL in the study area close to Fort Abbas well#1 and wire line logs of same well. By using wire line logs synthetic seismogram is developed and correlated with seismic data for picking reflectors of Khewra Sandstone, Nammal & Patala formations on available seismic sections. Time and depth contour maps are constructed by using Surfer software to highlight the subsurface structural trends. Normal fault of minimum throw is also picked up on seismic section and mapped by using Surfer software. An anticlinal structure at Cambrian level is observed on structural contour maps of the study area. A detail seismic stratigraphic study is done to highlight the stratigraphic trend in the study area but the results indicate that there is no prominent stratigraphic trap since a sigmoidal seismic facies is interpreted on seismic sections.
-
-
-
Preliminary Results of Geophysical Investigations in Podvodnikov Basin - Central Arctic
By O. SmirnovThe hypothesis of Podvodnikov basin's riftogenic origin is based on idea of continental type of crust in this region, which has become very popular in recent years. A seismic survey had been carried out in this region during "Shelf-2011" expedition. The qualitative interpretation of several common-midpoint stacks was done by author. Some features of riftogenic structures are quite visible on seismic sections presented. For velocity analysis a number of reflection-refraction soundings with sonobuoys had been carried out too in above-mentioned expedition. The velocity modeling through primal algorithm based on these sounding's data was performed by author. It shows regular p-wave velocity increase in sediments with depth increase. The velocity for acoustic basement upper boundary turned out to be 5.8 km/s, which is typical for consolidated crust.
-
-
-
Seismic Sequence, Tectonic History and Petroleum Potential of North Part of Kaymysovsk Vault
By A. MedvedIn the south-eastern regions of West Siberia most oil and gas fields are concentrated in the Upper anticlinal traps. When searching for oil and gas one of the major challenges facing the seismic is the selection of promising structures. This work, performed on the basis of complex interpretation of seismic data and deep drilling, is devoted to the analysis of structural framework and tectonic history of northern Kaymysovsk vault. Study area is located in the Tomsk region and part of the Mezhovsk oil and gas area in Kaymysovski oil and gas field. In the process, was created seismological project in interpretation package W-Seis, was correlated reflectors that control the basic seismological sedimentary complexes. Under the seismological complexes mean intervals of time sections showing thickness, characterized by different depositional environments. Roof and floor systems are seismic and geological boundary change in the conditions of sedimentation - the surface of the regional unconformities, breaks, or regional planation surfaces, which are confined to the most stable reflectors - seismic frames.
-
-
-
Exponential Finite Difference Method for Simulation of Electromagnetic Response of Layered Earth
Authors P. Jaysaval and P.K. GuptaThis paper presents an efficient algorithm Exponential Finite Difference Method (EFDM) for simulation of electromagnetic response of layered earth by considering the exponential basis function. EFDM demands a parameter μ to be chosen judiciously to obtain optimum results. Using eigenvalue analysis of coefficient matrix an estimator of optimum μ is defined. Since the electromagnetic response has oscillatory behavior, EFDM handles it better and gives more accurate results in comparison to the Classical Finite Difference Method (CFDM). Using EFDM we can choose coarser grids to obtain same accuracy of result as CFDM provides with a given grid. As a result EFDM reduces the time and cost of computation in comparison to CFDM.
-
-
-
Verification with Variogram of Gravity Survey Network to Delineate Moghan Region in Iran
Authors E. Karimifard and V.E. ArdestaniIn this study we use geostatistical tools such as variogram and Kriging to interpolate the data at regular grid interval. Variograms as inspector of structure of data which are available in geostatistics and Kriging is suitable method to interpolated irregular data base on result of variogram. This paper compares the three types of model of variograms to the computation of enhancing survey network. The aim is to investigate the components of them. This method has been successfully applied to the gravity data set in Moghan region of the Northwest Iran. Furthermore it has been identified the best model of variogram to use for the creation of interpolated data. The effectiveness of our approach is finding correlated range between data in earlier steps of studies and helps to minimize related later costs. Fitted Gaussian model to experimental variogram, implies good correlation between data. Moreover, Bouguer anomaly map is created by Kriging method hint at compatibility with previous studying on mentioned data set.
-
-
-
New Features in the Seismic Data Processing for High-fold Imaging
Authors I.A. Kurashov and V.I. BondarevIn this paper we describe the technique of obtaining of high-fold images. The proposed method is based on the idea of a two-step transformation of CMP seismic data. First, the trace for each source-receiver offset are recalculated to a special patch of area near the midpoint by original time-amplitude operator. And then repeating the procedure we get a superposition of many such patches, that give give a set of seismic traces for each point of area, the sum of which allow obtain a summary high-fold trace and subsequent high-fold image. Illustrates the application of this method to synthetic data.
-
-
-
Seismic Coring
Authors A. Amir Aboelros and M. Abd ElRahmanSeismic coring obtained its name from the fact that it reassembles the core of the earth (which is the source) and the different layers surrounding the core (receiver lines). Another reason is because it produces data in the form of a cylinder which simulates a core sample from earth. One of the main objectives of any seismic survey is to allocate faults, anticlines, dipping beds etc, by using seismic 2-D lines, the actual fault throw and dip angle of a dipping bed will be apparent values unless the seismic line is perpendicular on them. By using a circular geophone spread with different radii, this will ensure that the geophones present on every circle to record the same arrival time leading to accurate and precise determination of the fault throw and the dip angle of a dipping bed. The resulting data would therefore have an advantage over 2-D seismic lines in the accuracy of determining fault throw and dip angle of dipping beds. two types of sources: 1-Explosive sources: for fast 3-D mapping of subsurface structures especially circular structures. 2-Vibroseis: for detailed 3-D mapping of circular structures such as salt domes and folds.
-
-
-
Tectonic zoning of the earth crust of Barents-Kara seas region and adjacent structures of Eurasian continent
Authors A.S. Egorov, I.Y. Vinokurov, A.P. Kalenich and O.E. SmirnovPrincipal basis of the Earth’s crust deep structure investigations of Barents-Kara region and adjacent continental structures are DSS and CDP seismic sections. Additional features of the crust are estimated by results of inverse problems of gravimetry and magnetometry, magnetotelluric data and results of geothermic modeling. On the basis of these various data the radial-zoning model of the Earth’s crust was grounded. The principal objects of the model are: blocks (paleoplates) of continental type and interblock transitional zones (structures of tension, compression or shear type). These objects are identified with confidence on geotransect sections and on maps as areas of geophysical parameters stationarity (blocks) or gradient zones (interblock transitional zones). Comparison of coordinated map and deep sections of Barents-Kara region and adjacent continental structures provides imaging of regularities of spatial distribution of: cratons (East-European and Siberian); Grenvillian Barents fold area; Baikalian Timan-Pechora, Enisey and Taimyr fold areas; Hercynian Uralian and Central-West-Siberian fold areas; Cimmerian Paykhoi-Novozemelskiy fold area. Representation of sedimentary cover of Barents, Timan-Pechora, South- and North-Kara basins in the form of transparent layer of the map provides obtaining the principal new interpretation of deep structure of the Earth’s crust features, tectonics and geodynamics of the region.
-