TheFirst May 2017 V2 resized

2008

T he development of advanced seismic processing techniques and software is defined by the need to raise both seismic data quality and the quality of their geological interpretation. At present, the primary method for prospecting is a CMP seismic survey, with both two-dimensional and three-dimensional data. At the same time, due to the expanded range of problems being solved by this method (starting from kinematic and dynamic interpretation up to the construction of detailed seismo-geological and digital geologic models), there is a need to raise quality and the level of detail. Furthermore, seismic surveys are now performed in increasingly complex environments. These include complex surface conditions, such as abrupt topography changes; the presence of rivers, lakes, karsts, etc.; heterogeneities in the near-surface section (permafrost zones, sand sediments, etc.); as well as complex subsurface seismogeological conditions (complex fault structure, salt and clay diapirs, etc.); all o...

Geophysics, 2006

Systematic research of piezoelectric and seismoelectrokinetic phenomena in the context of exploration geophysics began in the former Soviet Union in the mid-1950s. These phenomena are manifested by electrical and electromagnetic (EM) processes that occur in rocks under the influence of elastic oscillations triggered by shots or mechanical impacts (hits). This paper presents a classification of piezoelectric and seismoelectrokinetic phenomena, which is based on the analysis of abundant theoretical, laboratory, and field data accumulated mainly by Soviet, Russian, and Israeli researchers. This classification divides the above phenomena into the following types: (1) the seismoelectrokinetic (electrokinetic) phenomenon E, which occurs in poly-phase media because of the mutual displacement of the solid and liquid phases; (2) the piezoelectric phenomenon, which occurs in rocks that contain piezoactive minerals; (3) the shot-triggered phenomenon, observed in rocks in the vicinity of a shotpoint or hit point; (4) the seismoelectric phenomenon I, manifested by the change of the electric current passing through rock; and (5) high-frequency impulse EM radiation, generated by massive base-metal bodies. This paper describes these five phenomena in detail — their nature, manifestation patterns, and registration techniques. Because the manifestation patterns of the phenomena differ in various types of rock, the phenomena can be used as a basis for geophysical exploration techniques. The piezoelectric method is an example of a successful application of piezoelectric and seismoelectrokinetic phenomena in exploration geophysics. This method was developed in the former Soviet Union, and it has been applied successfully in mineral exploration and research in Russia and, recently, in the West. The method uses a new geophysical parameter: piezoelectric activity of rocks, ores, and minerals. It enables direct exploration for pegmatite, apatite-nepheline, sphalerite, and ore-quartz deposits of gold, tin, tungsten, molybdenum, zinc, crystal, and other raw materials. This method also differentiates rocks such as bauxites and kimberlites from host rocks by their electrokinetic properties.

Oil and Gas Exploration

This chapter is devoted to investigating oil and gas content in the Ural region according to the position of the Earth's crust deep structure. A significant volume of deep seismic soundings was provided in the Ural region by the Bagenov geophysical expedition, by the Institute of Geophysics (Ural Branch of Russian Academy of sciences), and by the Center of Regional Geophysical Research (GEON) during some decades. We have elaborated a new technology of seismic geomapping, based on new model conceptions about the structure of the upper part of lithosphere. We sup plement the base of seismic research by the geological data (information about the oil and gas content of the region), the data of super deep bore holes, and area gravimetric data. That allowed us to construct a geologicalgeophysical fault-block volume model of the lithosphere (up to 80 km), to provide the tectonic mapping according to these cuts: the surface of ancient crystalloid crust and the main seismic geological surface M. On the basis of the obtained information compared with the data of hydrocarbon deposits location, new depth criteria of forecasting deposits in new regions and objects have been developed. We can assign some examples of positive fore casting. They are the Kueda region (south of Perm region) and the region of the town Khanti-Mansyisk.

SPE Reservoir Evaluation & Engineering, 2018

SummaryThe West Salym is a Salym Petroleum Development oil field in the Khanty-Mansi region, 120 km southwest of Surgut, Russia. The West Salym oil field was discovered in 1987 and was brought on stream in 2004. The reservoirs vary from fluvial/deltaic to shallow marine deposits. Primary development of the central area of West Salym Field is complete, but the field edges remain undeveloped and potentially attractive.The edges of the field are presented by a mouth bar and characterized by significant structural formation changes, including unknown formation dips and local carbonate concretions and stripes. The sand thickness of the target layer is 15 m, with a minimum oil height of 1 m, which is caused by structural dips and nearby oil/water contact (OWC). These conditions make it difficult to drain the area with geometrically placed wells within the hydrocarbon-saturated layer using well correlation and 3D seismic-interpretation results. Another challenge is the low resistivity cont...

Physics of the Earth and Planetary Interiors, 1993

As part of the Soviet-Norwegian programme in geology and geophysics, an investigation of electroconductivity in the upper part of the Earth's crust was carried out in 1989-1991. The measurements were performed using an electrical dipole source, 'Khibiny', which is situated on the Kola Peninsula, close to the Norwegian border. A 26 kW car generator supplied square pulses with a peak to peak current of 100 A in the 'Khibiny' cable; at a frequency of 0.125 Hz. The distance between the source and the measuring points varied from 60 to 130 km. A stacking technique was applied to identify the weak electromagnetic signals. All the measurements were conducted using a six-component digital automatic station, ZAIS, produced at the Institute of Fundamental Physics of the USSR Academy of Science. As a result of the studies, several conductive current channels in the Pechenga structure on the Russian side of the border were traced into the Pasvik area in Norway. Detailed information on the deeper parts of the electroconductive structures in this area was obtained.

With the extensive filtering described, the poorly coupled transmitter-receiver dipoles, and the EM coupling issue, it is not clear to us that the anomalies (Veeken et al, 2009) describe are real.

Geologia Croatica, 2010

Comparison of WeJl-J log data, and Seismic Line-I reprocessing with synthetic seismogram parameters, rcs ull s in a high level of correlation making possible Ihe precise location of the Well-Ion particular seismic trace or Seismic Line-1. Results indicate that slich Key seismic line (a reference) may be use ful as an entry for three-dimensional (3~) seismic surveys. The application of suc h procedures in complex reservoirs as the 13izovac field area (characterised by fracture porosity) , wi ll minimise 1l1e ri sk in dri lling a horizontal, re-entry well (to determine the production potel11ia! of the area around the We !!~!), and drilling a second well on the Nonhcasl side of Bizovacki Cret Structure.

ASEG Extended Abstracts, 2012