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[en] Full text: The presentation is dedicated to summarizing the results of studying lithological and petrographic peculiarities and petrophysical properties of relatively scarcely studied rocks of lower Pliocene Kalinsky Series in Absheron, particularly its lower horizons, as well as to determining the regularities of these properties change about the area, as well as along the geological section.These generalizations cover the areas of Gala, Turkany,Gala-Dubendy,Govsany,Garachukhur, Bina, Zykh, Peschany island, Chilov, Khali, Gryazevaya sopka, Pirallakhy, and they are necessary for determining the direction of exploration and increasing the efficiently of productive horizons development.Kalinsky series (KaS) is represented mostly by the alternation of siltstones,sandstones and shale and subjected to lithofacial changes along the section and about the area.Within the area under analysis the Kalinsky series thickness is changeable and decreases towards north-west (the crest), besides it pinches out, thus promoting lithostratigraphical traps occurrence. In this direction the arenosity of reservoir rocks increases.The The exposure of the 4-th and 5-th horizons of Kalinsky series in Peschany Island, Zyrya and Gryazevaya sopka gives us an opportunity to expect the occurrence of the corresponding formations in other areas as well. In the reservoir sections studied Kalinsky series is mostly of polymictic composition and is represented by badly sorted rocks.the sorting coefficient is within the range 2,5-4,7.Sands and sandstones occur relatively seldom.Silt fraction mostly prevails in their granulometric composition.The sand fraction content is close to the content of silt fraction in Surakhany, Garachukhur, Gum adasy, Zykh and Govsany (Fig.1).The reservoir rocks clayiness ranges within 12%-35%.Pelite fraction is the smallest in Surakhany, Peschany Island and Bina, while in Turkany, Gala, Gala-dubendy, Turkany-deniz and Gryazevaya sopka this fraction increases, attaining 28%-35% (Fig.1)Carbon content,porosity and permeability of the rocks correspondingly range within 0,2-42%, 2,9-33,3% and (34-1020)10-15sq.m.It is expedient to continue exploration in the southeastern part of the region, due to the facts, that reservoir properties here increase, reservoir rocks become thicker, and the reservoir covers about 50% of the whole area.Thus, Kalinsky series, and its lower horizons in particular are scarcely studied.In some areas these horizons are not exposed.That is why for the purpose of oil and gas presence degree clarification it is necessary to resume exploration in Absheron oil and gas bearing region Kalinsky series, and in particular in its lower horizons.
[en] Because many constitutive rock properties must be measured at one scale but applied at another, scaling behavior is an issue facing many applied disciplines, including the petroleum industry. A research program has been established to investigate and a quantify scaling behavior through systematic physical experimentation, with the aim of developing and testing models that describe scaling behavior in a quantitative manner. Scaling of constitutive rock properties is investigated through physical experimentation involving the collection of gas-permeability data measured over a range of discrete scales. The approach is to systematically isolate those factors that influence property scaling and investigate their relative contributions to overall scaling behavior. Two blocks of rock, each exhibiting differing heterogeneity structure. have recently been examined. The two samples were found to yield different scaling behavior, as exhibited by changes in the distribution functions and semi-variograms. Simple models have been fit to the measured scaling behavior that are of similar functional form but of different magnitude
[en] In a geophysical raising of amethyst and agate was studied the possibility to apply a better suitable geophysical method. The conclusion was that the electromagnetic VLF method was suitable to identify the zones.
[en] This paper employs a multivariate adaptive regression spline (MARS) for the prediction of the maximum magnitude (M) of reservoir-induced earthquakes based on reservoir parameters. MARS is a non-parametric adaptive regression procedure. It has the capability to determine the important sequence of inputs for the output. The comprehensive parameter (E) and maximum reservoir depth (H) are used as inputs for the MARS. The developed MARS gives an equation for the prediction of M. A comparative study is carried out between the developed MARS and other models and the results show that the developed MARS is a robust model for the prediction of M. (paper)
[en] Interruptible power purchased from electric utilities has been used by chemical and process industries fro many years, but is not generally used in oil producing operations. Interruptible power represents an established option to reduce electric power costs, which are often the oil producer's single largest operating expense. The recent use of interruptible power in Amoco Production Company's West Texas waterflood operations has significantly reduced operating expenses. Interruptible power rates are offered by many electric utility companies; however, the impact on producing operations is generally not known. This paper addresses the initial areas of concern and offers over two years of case history data showing how interruptible power affects operating costs, production equipment, producing rates and safety/environmental operations
[en] This patent describes a hydraulic release tool. It comprises a setting assembly; a coupling member for coupling to drill string or petroleum production components, the coupling member being a plurality of sockets for receiving the dogs in the extended position and attaching the coupling member the setting assembly; whereby the setting assembly couples to the coupling member by engagement of the dogs in the sockets of releases from and disengages the coupling member in movement of the piston from its setting to its reposition in response to a pressure in the body in exceeding the predetermined pressure; and a relief port from outside the body into its bore and means to prevent communication between the relief port and the bore of the body axially of the piston when the piston is in the setting position and to establish such communication upon movement of the piston from the setting position to the release position and reduce the pressure in the body bore axially of the piston, whereby the reduction of the pressure signals that the tool has released the coupling member
[en] Spectral decomposition transforms seismic data into the frequency domain via mathematical methods such as the discrete Fourier transform, S-transform, time–frequency continuous wavelet transform and continuous wavelet transform. The transformed results include tuning cubes and a variety of discrete common frequency cubes, which reveal structural and stratigraphic features, such as channels, thin bed reflections, and subtle faults. When a spectral decomposition algorithm is applied to seismic reflection data, it breaks down the seismic signal into its frequency components and this allows visualization of the data at specific frequencies, and identification of stratigraphic and structural features that would otherwise be overlooked in full bandwidth displays. The stratigraphic features delineated through the different algorithms, such as channels and their sedimentary facies, could be related to the presence of reservoir rock, i.e., underground rock units where the oil migrates and accumulates. An example from the Southeast Petroleum Province in México is presented.
[en] The purpose of this work was to establish relationships among permeability, geophysical and other data by integrating geologic, geophysical and engineering data into an interdisciplinary quantification of reservoir heterogeneity as it relates to production
[en] If deep reductions in anthropogenic greenhouse gas emissions are to be achieved, the introduction of CO2 capture and storage in geological reservoirs is likely to be necessary. The technology would be deployed alongside other mitigation measures such as renewables, energy efficiency and fuel switching. Currently, research programmes on the geological storage of CO2 are underway in the United States, the European Union, Australia and Japan. The aim of this paper is to present an overview of the research work that is currently underway and provide an analysis of the current state of knowledge on geological storage of CO2. The analysis will be broken down to address the key geological storage options: deep coal seams, depleted hydrocarbon reservoirs and deep saline aquifers. In each case, areas of uncertainty will be highlighted as well as areas where it is considered that further work will be needed so that the technology can be accepted by Governments and the general public as a mitigation option suitable for wide-scale application throughout the world. (author)