Experience of Implementation of Low-Frequency Seismic Sounding at Exploration Stage in the Samara Region

Sharapov, I.R.; Manasyan, A.E.; Papukhin, S.P.; Shabalin, N.Y.; Rizhov, V.A.; Feofilov, S.A.

doi:10.3997/2214-4609.201600162

Cited by 2 publications

(1 citation statement)

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“…Технология НСЗ хорошо зарекомендовала себя на суше во многих нефтегазоносных провинциях РФ и успешно применяется при поиске и разведке залежей УВ в практике ГРР различных нефтегазодобывающих компаний [1][2][3][4], в том числе при проведении работ на лицензионных участках ПАО «НК «Роснефть» [5].…”

Section: опыт проведения тестовых работ по технологии низкочастотногоunclassified

The Experience of Conduction of Low-Frequency Seismic Sounding Technology (LFS) Test Works on the Shelf of the Sea of Okhotsk (Sakhalin Island)

Ryzhov¹,

Zhukova²,

Chernyshkov³

et al. 2017

Proceedings

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SUMMARYLow-frequency seismic sounding (LFS) has proven itself on land in many oil and gas provinces of the Russian Federation and is successfully used in prospecting and exploration of hydrocarbon fields. In principle, the use of the LFS on the shelf and in the sea-land transit zone is possible when field records of low-frequency microseismic background obtained from the bottom surface have good quality. However, in order to fully confirm the working capacity of the technology for shelf conditions, there was required to conduct real test studies involving specialized bottom and seismological equipment. Test works of the LFS, in agreement with the branch of RN-Shelf-Arktika LLC, were carried out by a "wide" profile on land and shelf of one of the licensed areas on Sea of Okhotsk. The purpose of the surveys was to test the LFS technology in marine conditions, as well as to identify interpretation features of oil and gas potential zones, in analogy with the standard LFS surveys from daylight surface, and assess the oil and gas potential of the territory on the profile of observations. The result of the test work was a map of hydrocarbon potential for production layer of the Daginsky Formation within the "broad" profile of the LFS, which confirms the possibility of effective application of the LFS technology on the shelf of the seas.

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Section: опыт проведения тестовых работ по технологии низкочастотногоunclassified

The Experience of Conduction of Low-Frequency Seismic Sounding Technology (LFS) Test Works on the Shelf of the Sea of Okhotsk (Sakhalin Island)

Ryzhov¹,

Zhukova²,

Chernyshkov³

et al. 2017

Proceedings

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Combining 1C & 3C Sensors: An Evolution in Passive LFS Low Frequency Seismic Exploration

Jadani¹,

Birialtcev²,

Ryzhov³

et al. 2020

Day 3 Wed, January 15, 2020

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Passive low frequency seismic exploration is a technology for specifying the geological attributes of the earth's interior. Known examples of its application for tasks, for example, determining of the contour of hydrocarbon deposits (direct hydrocarbon indicator DHI) [2, 4, 8, 14, 18, 21, 23, 26, 35, 36, 37]. However, most of the results are qualitative. In this paper, we propose a physic-mathematical method for interpreting this phenomenon, based on the recognized approaches of extracting the Green function from passive observations [27, 45, 46] and methods for solving the partial problem of full-wave inversion [16]. It is known that the correlation function of observations of a random field carries information about the Green function, which is a response to the structure of the geological setting [15]. We additional filter out Rayleigh surface waves and inclined waves using linear prediction algorithms [10]. It is assumed that the properties of the medium are known; it is necessary to determine the location of a small-thickness formation with anomalous absorption. Hydrocarbon deposits with high permeability are recognized with high absorption. Abnormal absorption at low frequencies occurs as a result of friction of the liquid phase of hydrocarbons on the skeleton of the rock during the passage of longitudinal waves [7, 10]. Contrast of anomalous absorptions can cause additional reflections (resonance). The task is reduced to a one-dimensional partial task of the full-wave inversion, when the base model is generally known, and it is necessary to find individual deviations (oil-saturated reservoirs). A numerical simulation is performed with different possible placements of a search object. Field record spectra, after applying filtering procedures, are matched with synthetic ones. We solve this problem in the Born approximation of single scattering with regularization in the form of restrictions on the coefficients, this problem is solved by quadratic programming. The proposed method has been applied to solve problems of hydrocarbon prospecting [41]. Combining 1C (single component) sensors and 3C (three components) ones is considered as an evolution to solve problems concerning scarcity of passive LFS data due to our long-time reliance on 3C sensors only to collect such valuable data. Quantitative approaches will merge soon!

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Experience of Implementation of Low-Frequency Seismic Sounding at Exploration Stage in the Samara Region

Cited by 2 publications

References 0 publications

The Experience of Conduction of Low-Frequency Seismic Sounding Technology (LFS) Test Works on the Shelf of the Sea of Okhotsk (Sakhalin Island)

The Experience of Conduction of Low-Frequency Seismic Sounding Technology (LFS) Test Works on the Shelf of the Sea of Okhotsk (Sakhalin Island)

Combining 1C & 3C Sensors: An Evolution in Passive LFS Low Frequency Seismic Exploration

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