SU1589230A1 - Method of seismic investigations of deposits of oil and gas - Google Patents
Method of seismic investigations of deposits of oil and gas Download PDFInfo
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- SU1589230A1 SU1589230A1 SU884409398A SU4409398A SU1589230A1 SU 1589230 A1 SU1589230 A1 SU 1589230A1 SU 884409398 A SU884409398 A SU 884409398A SU 4409398 A SU4409398 A SU 4409398A SU 1589230 A1 SU1589230 A1 SU 1589230A1
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Abstract
Изобретение относитс к сейсмическим методам исследовани месторождений нефти и газа и может быть использовано при разведке вы вленных структур с целью прогнозировани и определени контура нефтегазоносности. Цель изобретени - повышение эффективности. Дл этого производитс одновременна регистраци микросейсмических колебаний сетью сейсмический станций, расположенных в пределах и вне контура месторождени . Наблюдени провод тс в течение не менее 5 сут. двум раздельными частотными каналами в диапазоне частот от 0,5 до 2 Гц, причем фильтраци осуществл етс неперекрывающимис полуоктавными фильтрами. Строитс зависимость отношение амплитуд на выходах двух частотных каналов от месторождени пункта регистрации. Аномали графика отношений соответствует положению месторождени .The invention relates to seismic methods for the exploration of oil and gas fields and can be used in the exploration of identified structures in order to predict and determine the oil and gas content contour. The purpose of the invention is to increase efficiency. For this, simultaneous recording of microseismic vibrations by a network of seismic stations located within and outside the field contour is performed. The observations are carried out for at least 5 days. two separate frequency channels in the frequency range from 0.5 to 2 Hz, and filtering is carried out by non-overlapping semi-octave filters. The dependence of the amplitudes at the outputs of the two frequency channels on the field of the registration point is constructed. Anomalies of the relationship chart corresponds to the position of the field.
Description
Изобретение относитс к сейсмическим методам исследовани месторождений нефти и газа и может быть использовано при разведке вы вленных структур с целью прогнозировани и определени контура нефтегазоноснос- ти.The invention relates to seismic methods for studying oil and gas fields and can be used in the exploration of identified structures in order to predict and determine the contour of oil and gas content.
Цель изобретени - повышение эффективности .The purpose of the invention is to increase efficiency.
Способ осуществл ют следующим образом .The method is carried out as follows.
Наблюдени на излучаемых площад х ведут вдоль профилей, пересекающих сводовую часть структуры вкрест её простирани , с уплотнением пунктов наблюдений в сводовой части. Прот женность профилей выбирают такой, чтобыObservations on the radiated areas are along profiles that intersect the arched part of the structure across its strike, with a seal of observation points in the arched part. The length of the profiles is chosen so that
не менее двух крайних пунктов регистрации находились за пределами предполагаемого месторождени . Регистрацию вертикальной и горизонтальных компонент микросейсм ведут одновременно всеми сейсмическими станци ми на всей площади наблюдений в течение не менее 5 днейat least two extreme points of registration were outside the intended field. Vertical and horizontal components of microseisms are simultaneously recorded by all seismic stations over the entire observation area for at least 5 days.
Така продолжительность наблюдений обусловлена тем, что длительность аномалий микросейсмического фона различной природы (микросейсмические бури, техногенна де тельность и т.д ) ;не превышает 2-3 сут. В этом случае на врем регистрации ( не менее 5 сут.) приходитс достаточно продолжительный интервал времени, неSuch a duration of observations is due to the fact that the duration of anomalies of a microseismic background of different nature (microseismic storms, man-made activity, etc.) does not exceed 2-3 days. In this case, at the time of registration (at least 5 days) there is a rather long interval of time, not
зан тый аномалией микросейсмического фона, по которому можно уверенно выделить искомую аномалию, обусловленную нефтегазовой залежью. Регистрацию ведут одновременно двум частотно-разделенными каналами, Фильтра- даю зарегестрированных колебаний провод т с помощью двух полуоктавньгх фильтров с неперекрывающимис частотными полосами в диапазоне частот 0,5 - 2,0 Гц.occupied by the anomaly of the microseismic background, by which one can confidently isolate the desired anomaly caused by the oil and gas reservoir. The recording is carried out simultaneously by two frequency-separated channels. The filtering of registered oscillations is carried out with the help of two semi-octave filters with non-overlapping frequency bands in the frequency range 0.5-2.0 Hz.
Такой выбор обусловлен тем, что Ьклон частотной характеристики микро- сейсм, обеспечивающий получение надеж йых результатов, расположён в диапазоне частот 0,5 - 2 Гц. Частоты ниже 0,5 Гц плохо регистрируютс стандартными сейсмографами, а выше 2 Гц параметры микросейсм отличаютс неустойчивостью . При регистрации микро- 1сейсм с помощью автономных сейсмических станций с магнитной записью указанна фильтраци производитс при воспроизведении.Such a choice is due to the fact that the slope of the frequency response of a micro seismic, which provides reliable results, is located in the frequency range of 0.5 - 2 Hz. Frequencies below 0.5 Hz are poorly recorded with standard seismographs, and above 2 Hz, microseism parameters are unstable. When registering a micro-seismic with the help of autonomous seismic stations with magnetic recording, this filtering is performed during playback.
Затем дл каждого пункта регистрации определ ют отношени среднеквадратичных амплитуд, равные A(f,)/A(f2 где f и f 2 - соответственно нижн и верхн частоты, и стро т огибаю111ие этого отношени вдоль профилей наблюдений . Такой подход избавл ет от необходимости индентификации каналов регистрации. При пересечении контура нефтегазоносности. по мере приближени к сводовой части залежи увеличиThen, for each registration point, ratios of rms amplitudes equal to A (f,) / A are determined (f2 where f and f 2 are the lower and upper frequencies, respectively, and plot this ratio along the observation profiles. This approach eliminates the need for identification registration channels.When crossing the contour of oil and gas, as you approach the arch part of the reservoir,
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5five
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5five
ваютс значени отношений, св занные с увеличением поглощени на частоте fj . По точкам, соответствующим увеличению отношений, выдел ют примерный контур .месторождени .relationship values are associated with an increase in absorption at frequency fj. At the points corresponding to an increase in the ratio, an approximate contour of the place of birth is selected.
Использование изобретени обеспечивает повышение эффективности за счет меньшей зависимости от вариаций микросейсм во времени и в пространств е.The use of the invention provides an increase in efficiency due to less dependence on variations of microseisms in time and in space.
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884409398A SU1589230A1 (en) | 1988-04-13 | 1988-04-13 | Method of seismic investigations of deposits of oil and gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU884409398A SU1589230A1 (en) | 1988-04-13 | 1988-04-13 | Method of seismic investigations of deposits of oil and gas |
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| Publication Number | Publication Date |
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| SU1589230A1 true SU1589230A1 (en) | 1990-08-30 |
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| SU884409398A SU1589230A1 (en) | 1988-04-13 | 1988-04-13 | Method of seismic investigations of deposits of oil and gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0455091A2 (en) * | 1990-04-28 | 1991-11-06 | Koji Tokimatsu | Methods for measurement, analysis and assessment of ground structure |
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1988
- 1988-04-13 SU SU884409398A patent/SU1589230A1/en active
Non-Patent Citations (1)
| Title |
|---|
| Патент GB № 2174809, , кл. G 01 V 1/36,1986. Программа Развитие физических основ сейсмических методов. М:ИФЗ АН СССР, 1981, с. 158-160. * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0455091A2 (en) * | 1990-04-28 | 1991-11-06 | Koji Tokimatsu | Methods for measurement, analysis and assessment of ground structure |
| EP0845688A3 (en) * | 1990-04-28 | 1998-07-29 | Koji Tokimatsu | System and method for measurement, analysis and assessment of ground structures |
| US6253870B1 (en) | 1990-04-28 | 2001-07-03 | Koji Tokimatsu | Methods for measurement, analysis and assessment of ground structure |
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