CN105759312A - Reservoir characteristic method well-seismic calibration method - Google Patents
Reservoir characteristic method well-seismic calibration method Download PDFInfo
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Abstract
The invention relates to a reservoir characteristic method well-seismic calibration method, characterized by comprising the steps of 1) establishing a corresponding relation between different lithologic interfaces and seismic reflected waves; 2) selecting a marked well for calibration, establishing a corresponding relation between different oil groups and seismic responses, and determining reservoir characteristics of the different oil groups and characteristics of the seismic responses; 3) extracting sub waves from a seismic trace by well to generate a synthetic record, carrying out fine calibration for internal sands group of the different oil groups, and completing the calibration of the marked well; 4) establishing a well-tie seismic cross-section between a next well to be calibrated and the marked well, taking a VSP of the well to be calibrated or a time-depth relation of the marked well as an initial time-depth relation for calibration, and referring to a corresponding relation between a reservoir of well logging interpretation of the marked well and a seismic reflected in phase axis for calibration; 5) repeating the step 4) to calibrate the next well; and 6) after calibration of all the wells, carrying out quality control through time-depth relation curve overlapping display and statistics of the speed of each well, and completing the reservoir characteristic method calibration.
Description
Technical field
The present invention relates to the well shake scaling method connecting well logging and earthquake information in a kind of oil and gas development process, especially with regard to a kind of reservoir characteristic method well shake scaling method.
Background technology
Along with deepening continuously of oilfield prospecting developing, encountering more and more oil-gas reservoir with complicated structure lithology, this brings great difficulty to oil-gas field development.Meanwhile, entering the oil field of high water cut rate, moisture content rises, and yield declines, and remaining oil prediction becomes the demand that oil field development is extremely urgent.Therefore, it is necessary to carry out fine structural interpretation and High precision reservoir prediction could solve the difficult problem of the exploitation of complex hydrocarbon field and high water cut rate oil field remaining oil prediction better.Geological information acquired to drilling well, well-log information is demarcated on seismic profile by reservoir characteristic method scaling method, set up the corresponding relation between the reservoir characteristic of seismic response features and well-log information reflection, give geology connotation to earthquake reflected wave, characterize the situation of change of subsurface structure and reservoir with seismic reflection information.On this basis, it is achieved the Fine structural interpretation of structure and the fine of reservoir are characterized.
Existing well shake scaling method is based primarily upon the Waveform Correlation of composite traces and well lie earthquake record and demarcates, when this method is poor at well logging sound wave curve quality or there is particular lithologic in reservoir, composite traces is very low with the Waveform Correlation of well lie earthquake record, it is difficult to exactly by corresponding good for seismic response that the Reservoir Section of interpretation of logging data is corresponding with on seismic data, easily cause false dependency when well logging sound wave curve quality is poor, it is difficult to realize the Fine calibration of well shake.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide a kind of reservoir characteristic method well shake scaling method being capable of well shake Fine calibration.
For achieving the above object, the present invention takes techniques below scheme: a kind of reservoir characteristic method well shake scaling method, it is characterized in that, including herein below: 1) by well log analysis different lithology section log variation characteristic, and cross the other seismic reflection waveform variation characteristic of well seismic profile analysis well by correspondence, set up corresponding relation between different lithology segment limit face and earthquake reflected wave；2) selection marker well is demarcated, and utilizes VSP data and Ricker wavelet to generate composite traces and different lithology segment limit face is demarcated, set up corresponding relation between different line of oils and seismic response, it is determined that different line of oils reservoir characteristics and seismic response features；3) extract wavelet from seismic trace near well and generate composite traces, Fine calibration is carried out for the internal Sand member of different line of oils, by on the lithology in well logging, physical property and hydrocarbon information accurate calibration to seismic profile, setting up the seismic response pattern of characteristics of reservoirs, complement mark well is demarcated；4) lower a bite need the well demarcated set up even well seismic profile with mark well, the time deep relation of the VSP of well to be calibrated or mark well is demarcated as relation deep time initial, the corresponding relation of the reservoir of the well log interpretation of reference mark well and seismic reflection lineups is demarcated, it is ensured that the reservoir of this bite well is consistent with mark well with seismic reflection lineups corresponding relation；5) step 4 is repeated) lower a bite well to be demarcated, it is ensured that aboveground same Reservoir Section is demarcated on identical earthquake reflection line-ups；6) each well demarcate after by time deep relation curve overlapping display and add up each well interval velocity and carry out Quality Control, complete reservoir characteristic method and demarcate.
Further, step 2) utilize VSP data and Ricker wavelet to generate composite traces to concretely comprising the following steps that different lithology segment limit face is demarcated: 2.1) VSP of selection marker well is as relation deep time initial, if mark well does not have VSP, select the sound wave curve of this well as relation deep time initial, with reference to the dominant frequency of seismic data, the Ricker wavelet of close dominant frequency is selected to make composite traces；2.2) zero phase Ricker wavelet is selected to make composite traces, composite traces is carried out overall drift by the time quantum selecting an entirety drift, writing down this time drift amount t1, wherein, this drift time, amount must assure that the lithologic interface of more than 80% is corresponding with seismic response；2.3) 180 ° of phase place Ricker wavelets are selected to make composite traces, composite traces is carried out overall drift by the time quantum selecting an entirety drift, writing down this time drift amount t2, wherein, this drift time, amount must assure that the lithologic interface of more than 80% is corresponding with seismic response；2.4) two time drift amount t1 and t2 of contrast, select the Ricker wavelet of phase place corresponding to less time drift value to carry out follow-up demarcation；2.5) after determining and adopting the Ricker wavelet of certain phase place to carry out suitable overall drift, keep the invariant position of corresponding good lithologic interface and seismic reflection lineups, to the lithologic interface do not demarcated by making it corresponding with seismic reflection lineups good less than the stretching of seismic reflection lineups, compression, as far as possible away from corresponding good lithologic interface during Compression and Expansion.
Further, step 2) the concretely comprising the following steps of selection marker well: a) select that the finishing drilling degree of depth in oil field is maximum, stratum, Zuan Yu this area at most, the most full well；B) on the basis of step a), filtering out the well of VSP, if all wells of this block all without VSP, then filter out, sound wave, density curve measuring section be the longest, curve is through the well of environmental correction and depth correction；C) on step b) basis, the minimum well of screening well Locus deviation is continued as mark well.
Further, step 6) each well demarcate after by time deep relation curve overlapping display and add up each well interval velocity and carry out Quality Control, complete reservoir characteristic method to demarcate, comprise the following steps: 6.1) the time deep relation curve demarcated according to each well, add up the degree of depth corresponding to the geological layering of each well and time；6.2) according to adjacent geological layer depth value and time value, depth value and time value correspondence respectively being subtracted each other and obtain depth difference and time difference, two differences are divided by the interval velocity that can obtain between two adjacent geological layering；6.3) calculated interval velocity is arranged in form, checks calibration mass according to rank results, if each well interval velocity difference of same line of oils is less than preset value, and time deep relation curve without departing from the abnormity point of curve overall trend, it was shown that calibration mass is better.
Due to the fact that and take above technical scheme, it has the advantage that 1, the present invention is respectively from the other seismic reflection waveform variation characteristic of log variation characteristic and well, Fine calibration corresponding relation between the two so that the corresponding relation between seismic response features and the reservoir of well logging, characteristic of fluid is recognized more accurately, finer.2, due to the fact that and with reference to VSP in calibration process, based on overall time drift, local only carries out trickle stretching, compression, it is to avoid thinks and the distortion of formation thickness that factor causes and formation velocity improves quality and the precision of reservoir calibration.3, due to the fact that employing reference mark well, by the mode that even well is demarcated, other wells are expressed, ensure that the concordance of reservoir calibration, after demarcation by time deep relation curve overlapping display and add up each well interval velocity and carry out Quality Control and also ensure that calibration mass and precision.Present invention can be widely used to oil-gas exploration and development process acceptance of the bid location survey well and earthquake information.
Accompanying drawing explanation
Fig. 1 is reservoir characteristic method well of the present invention shake scaling method schematic diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is carried out detailed description.It should be appreciated, however, that being provided only of accompanying drawing is more fully understood that the present invention, they should not be interpreted as limitation of the present invention.
As it is shown in figure 1, reservoir characteristic method well provided by the invention shake scaling method, including herein below:
1, by the log variation characteristic of the well log analysis different lithology sections such as natural gamma, sound wave, density, resistivity, and cross the other seismic reflection waveform variation characteristic of well seismic profile analysis well by corresponding, thus the corresponding relation set up between different lithology segment limit face and earthquake reflected wave.
2, selection marker well is demarcated, and utilizes VSP data and Ricker wavelet generation composite traces that different lithology segment limit face is demarcated, and sets up the corresponding relation between different line of oils and seismic response, it is determined that the reservoir characteristic of different line of oils and seismic response features.
Concretely comprising the following steps of selection marker well: 1) select that the finishing drilling degree of depth in oil field is maximum, stratum, Zuan Yu this area at most, the most full well；2) in step 1) basis on, filter out the well of VSP (vertical seismic profiling (VSP)), if all wells of this block all without VSP, then filter out, sound wave, density curve measuring section be the longest, curve is through the well of environmental correction and depth correction；3) in step 2) the upper minimum well of screening well Locus deviation that continues in basis is as indicating well.
VSP data and Ricker wavelet is utilized to generate composite traces to concretely comprising the following steps that different lithology segment limit face is demarcated: 1) VSP of selection marker well is as relation deep time initial, if mark well does not have VSP, select the sound wave curve of this well as relation deep time initial, with reference to the dominant frequency of seismic data, the Ricker wavelet of close dominant frequency (difference is less than 5Hz) is selected to make composite traces；2) selecting zero phase Ricker wavelet to make composite traces, select the time quantum of an entirety drift that composite traces carries out overall drift, this drift time, amount must assure that the lithologic interface of more than 80% is corresponding with seismic response, writes down this time drift amount t1；3) 180 ° of phase place Ricker wavelets are selected to make composite traces, composite traces is carried out overall drift by the time quantum selecting an entirety drift, this drift time, amount must assure that the lithologic interface of more than 80% is corresponding with seismic response, writes down this time drift amount t2；4) two time drift amount t1 and t2 of contrast, select the Ricker wavelet of the less corresponding phase place of time drift amount to carry out follow-up demarcation；5) after determining and adopting the Ricker wavelet of certain phase place to carry out suitable overall drift, keep the invariant position of corresponding good lithologic interface and seismic reflection lineups, to the lithologic interface do not demarcated by making it corresponding with seismic reflection lineups good less than the stretching of seismic reflection lineups, compression, as far as possible away from corresponding good lithologic interface during Compression and Expansion.
3, extract wavelet from seismic trace near well and generate composite traces, Fine calibration is carried out for the internal Sand member of different line of oils, by on the lithology in well logging, physical property and hydrocarbon information accurate calibration to seismic profile, set up the seismic response pattern of characteristics of reservoirs, the demarcation of complement mark well.Wherein, during Fine calibration, fixing corresponding good lithologic interface, make it corresponding with seismic reflection lineups good by trickle stretching, compression the Sand member do not demarcated, as far as possible away from corresponding good lithologic interface during Compression and Expansion.
4, lower a bite need the well demarcated set up even well seismic profile with mark well, demarcate using the time deep relation of the VSP of well to be calibrated or mark well as relation deep time initial, the corresponding relation of the reservoir of the well log interpretation of reference mark well and seismic reflection lineups is demarcated, it is ensured that the reservoir of this bite well is consistent with mark well with the corresponding relation of seismic reflection lineups.
5, repeat step 4 lower a bite well is demarcated, it is ensured that aboveground same Reservoir Section is demarcated on identical seismic reflection lineups.
6, each well demarcate after by time deep relation curve overlapping display and add up the interval velocity of each well and carry out Quality Control, complete reservoir characteristic method and demarcate, comprise the following steps:
1) the time deep relation curve demarcated according to each well, adds up the degree of depth corresponding to the geological layering of each well and time；
2) according to adjacent geological layer depth value and time value, depth value and time value correspondence respectively being subtracted each other and obtain depth difference and time difference, two differences are divided by the interval velocity that can obtain between two adjacent geological layering；
3) calculated interval velocity is arranged in form, it is laterally well, it it is longitudinally the interval velocity between different geological layering, calibration mass is checked according to rank results, if the interval velocity difference of each well of same line of oils is less than 100m/s, (this preset value can be determined according to actual needs, in this no limit), and time deep relation curve without departing from the abnormity point of curve overall trend, it was shown that calibration mass is better.
The various embodiments described above are merely to illustrate the present invention, and wherein each step etc. of implementing of method all can be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement, all should not get rid of outside protection scope of the present invention.
Claims (4)
1. a reservoir characteristic method well shake scaling method, it is characterised in that include herein below:
1) by well log analysis different lithology section log variation characteristic, and cross the other seismic reflection waveform variation characteristic of well seismic profile analysis well by correspondence, set up corresponding relation between different lithology segment limit face and earthquake reflected wave；
2) selection marker well is demarcated, and utilizes VSP data and Ricker wavelet to generate composite traces and different lithology segment limit face is demarcated, set up corresponding relation between different line of oils and seismic response, it is determined that different line of oils reservoir characteristics and seismic response features；
3) extract wavelet from seismic trace near well and generate composite traces, Fine calibration is carried out for the internal Sand member of different line of oils, by on the lithology in well logging, physical property and hydrocarbon information accurate calibration to seismic profile, setting up the seismic response pattern of characteristics of reservoirs, complement mark well is demarcated；
4) lower a bite need the well demarcated set up even well seismic profile with mark well, demarcate using the time deep relation of the VSP of well to be calibrated or mark well as relation deep time initial, the corresponding relation of the reservoir of the well log interpretation of reference mark well and seismic reflection lineups is demarcated, it is ensured that the reservoir of this bite well is consistent with mark well with seismic reflection lineups corresponding relation；
5) step 4 is repeated) lower a bite well to be demarcated, it is ensured that aboveground same Reservoir Section is demarcated on identical earthquake reflection line-ups；
6) each well demarcate after by time deep relation curve overlapping display and add up each well interval velocity and carry out Quality Control, complete reservoir characteristic method and demarcate.
2. a kind of reservoir characteristic method well shake scaling method as claimed in claim 1, it is characterised in that step 2) utilize VSP data and Ricker wavelet to generate composite traces to concretely comprising the following steps that different lithology segment limit face is demarcated:
2.1) VSP of selection marker well is as relation deep time initial, if mark well does not have VSP, selects the sound wave curve of this well as relation deep time initial, with reference to the dominant frequency of seismic data, selects the Ricker wavelet of close dominant frequency to make composite traces；
2.2) zero phase Ricker wavelet is selected to make composite traces, composite traces is carried out overall drift by the time quantum selecting an entirety drift, writing down this time drift amount t1, wherein, this drift time, amount must assure that the lithologic interface of more than 80% is corresponding with seismic response；
2.3) 180 ° of phase place Ricker wavelets are selected to make composite traces, composite traces is carried out overall drift by the time quantum selecting an entirety drift, writing down this time drift amount t2, wherein, this drift time, amount must assure that the lithologic interface of more than 80% is corresponding with seismic response；
2.4) two time drift amount t1 and t2 of contrast, select the Ricker wavelet of phase place corresponding to less time drift value to carry out follow-up demarcation；
2.5) after determining and adopting the Ricker wavelet of certain phase place to carry out overall drift, keep the invariant position of corresponding good lithologic interface and seismic reflection lineups, to the lithologic interface do not demarcated by making it corresponding with seismic reflection lineups good less than the stretching of seismic reflection lineups, compression, as far as possible away from corresponding good lithologic interface during Compression and Expansion.
3. reservoir characteristic method well shake scaling method as claimed in claim 1 or 2 a kind of, it is characterised in that step 2) the concretely comprising the following steps of selection marker well:
A) select that the finishing drilling degree of depth in oil field is maximum, stratum, Zuan Yu this area at most, the most full well；
B) on the basis of step a), filtering out the well of VSP, if all wells of this block all without VSP, then filter out, sound wave, density curve measuring section be the longest, curve is through the well of environmental correction and depth correction；
C) on step b) basis, the minimum well of screening well Locus deviation is continued as mark well.
4. a kind of reservoir characteristic method well shake scaling method as claimed in claim 1 or 2, it is characterized in that, 6) each well demarcate after by time deep relation curve overlapping display and add up each well interval velocity and carry out Quality Control, complete reservoir characteristic method and demarcate, comprise the following steps:
6.1) the time deep relation curve demarcated according to each well, adds up the degree of depth corresponding to the geological layering of each well and time；
6.2) according to adjacent geological layer depth value and time value, depth value and time value correspondence respectively being subtracted each other and obtain depth difference and time difference, two differences are divided by the interval velocity that can obtain between two adjacent geological layering；
6.3) calculated interval velocity is arranged in form, checks calibration mass according to rank results, if each well interval velocity difference of same line of oils is less than preset value, and time deep relation curve without departing from the abnormity point of curve overall trend, it was shown that calibration mass is better.
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| CN106324681A (en) * | 2016-08-24 | 2017-01-11 | 中国石油化工股份有限公司 | Time-frequency continuous wavelet transform well-to-seismic calibration method |
| CN106569280A (en) * | 2016-10-28 | 2017-04-19 | 中国石油化工股份有限公司 | Calibration method for improving seismic interpretation precision of fault terrace structures |
| CN106873036A (en) * | 2017-04-28 | 2017-06-20 | 中国石油集团川庆钻探工程有限公司 | A kind of denoising method combined based on well shake |
| CN107956465A (en) * | 2017-10-12 | 2018-04-24 | 中国石油天然气集团公司 | The more borehole logging tool log normalization method and devices of the whole district based on association well |
| CN107966730A (en) * | 2016-10-18 | 2018-04-27 | 中国石油化工股份有限公司 | The method for identifying fault depressed lacustrine basin actic region Analyze of Nearshore Subaqueous Fans sedimentary facies belt |
| CN109283577A (en) * | 2017-07-20 | 2019-01-29 | 中国石油化工股份有限公司 | A kind of seismic layer labeling method |
| CN109932749A (en) * | 2019-03-05 | 2019-06-25 | 中国石油天然气股份有限公司 | A kind of well shake scaling method, device |
| CN110424955A (en) * | 2019-06-19 | 2019-11-08 | 中国石油化工股份有限公司 | A kind of complex fault block inside Tapping Potential Method |
| CN110579806A (en) * | 2019-09-11 | 2019-12-17 | 大庆油田有限责任公司 | rapid well seismic calibration method under well pattern tight condition |
| CN110673209A (en) * | 2019-10-13 | 2020-01-10 | 东北石油大学 | Well-seismic calibration method |
| CN110945385A (en) * | 2017-07-28 | 2020-03-31 | 国际商业机器公司 | Identifying formations from seismic and well data using a formation knowledge base |
| CN111075440A (en) * | 2019-11-26 | 2020-04-28 | 中国石油天然气股份有限公司 | Unconformity oil and gas reservoir scale prediction method and device |
| CN111458751A (en) * | 2019-01-22 | 2020-07-28 | 中国石油天然气股份有限公司 | Comprehensive time depth calibration method and device |
| CN112001055A (en) * | 2019-11-07 | 2020-11-27 | 中海石油(中国)有限公司 | Low-amplitude thin oil reservoir water content prediction method based on microstructure |
| CN113376696A (en) * | 2020-02-25 | 2021-09-10 | 中国石油天然气股份有限公司 | Well seismic calibration method and device based on multiple wavelets |
| CN117077068A (en) * | 2023-10-18 | 2023-11-17 | 中国科学院地质与地球物理研究所 | Real-time calibration method and system for deep oil gas accurate navigation while drilling acoustic logging data |
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| CN110579806B (en) * | 2019-09-11 | 2022-03-22 | 大庆油田有限责任公司 | Rapid well seismic calibration method under well pattern tight condition |
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| CN112001055B (en) * | 2019-11-07 | 2024-04-09 | 中海石油(中国)有限公司 | Low-amplitude thin oil reservoir water content prediction method based on microstructure |
| CN111075440A (en) * | 2019-11-26 | 2020-04-28 | 中国石油天然气股份有限公司 | Unconformity oil and gas reservoir scale prediction method and device |
| CN113376696A (en) * | 2020-02-25 | 2021-09-10 | 中国石油天然气股份有限公司 | Well seismic calibration method and device based on multiple wavelets |
| CN117077068A (en) * | 2023-10-18 | 2023-11-17 | 中国科学院地质与地球物理研究所 | Real-time calibration method and system for deep oil gas accurate navigation while drilling acoustic logging data |
| CN117077068B (en) * | 2023-10-18 | 2024-03-08 | 中国科学院地质与地球物理研究所 | Real-time calibration method and system for deep oil gas accurate navigation while drilling acoustic logging data |
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