CN104914470A - Carbonate rock fracture-cavity reservoir reserve correction method - Google Patents
Carbonate rock fracture-cavity reservoir reserve correction method Download PDFInfo
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- 238000012937 correction Methods 0.000 title claims abstract description 33
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- 238000013341 scale-up Methods 0.000 description 4
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Abstract
The invention discloses a carbonate rock fracture-cavity reservoir reserve correction method. The method comprises the following steps: establishing a sample well in an effective carbonate rock fracture-cavity reservoir area; obtaining reservoir volume correction coefficient according to the actual mining amount and reservoir parameters of a sample well; and carrying out correction on the reserves in the effective carbonate rock fracture-cavity reservoir area according to the reservoir volume correction coefficient. Therefore, the method solves the problem of low prediction precision of the carbonate rock fracture-cavity reservoir reserves, so that the prediction precision of the carbonate rock fracture-cavity reservoir reserves is improved, risk and cost in the further mining work are reduced, mining investment is allowed to be more accurate, and higher prediction benefit and exploitation benefit can be obtained.
Description
Technical field
The present invention relates to petroleum exploration field, be applied to reservoir prediction, particularly carbonate rock fractured cave reservoir reserves bearing calibration.
Background technology
Along with the exploitation of oil-gas resource, conventional Porous Reservoir reserves reduce day by day, and development difficulty increases gradually, and crack causes the concern of vast oil worker as the place of oil gas reservoir.Fracture-type reservoir refers to crack to be main place, the research of reservoir also develops into other various types of reservoir study gradually from the porous reservoir of routine, the particularly research of the reservoir of fracture-type reservoir reservoir space, seepage channel, the geologic structure that existence dispersion, isolated pore are interconnected in reservoir, thus add net porosity, and there is Thief zone feature.For fracture reservoir in order to effectively exploitation can be realized, general according to Static and dynamic data statistics analyses such as geology, earthquake, well loggings in prior art, set up seam hole body forward model; To different size, difformity, difference in length and breadth spacing and various combination seam hole model carry out forward simulation, there is amplitude tune effect, the seam hole body of different filling operation in the response of seam hole body, oscillator intensity is different in time domain.By just drilling analysis, the size that in seismologic record, " beading " reflect does not represent the actual size of seam hole, underground body, no matter we with which kind of standard measure, be all be exaggerated several times than the seam hole body Model of reality, " beading " reflection in the seismologic record observed is all a kind of effect that the true solution cavity in underground is exaggerated.Analysis shows: the actual size of seam hole body is nonlinear relationship with its enlargement factor in seismic reflection pattern, and stitch hole body larger, enlargement factor is less; Through the cross analysis of seam hole body width that study area actual well drilled and seismic reflection are observed and height, calculate seismological observation volume and actual scale-up factor stitch hole volume, the volume that earthquake invertomer is carved is corrected.
In above-mentioned prior art, due to the seismological observation volume and the actual size of stitching the scale-up factor of hole volume that calculate, depend on and comprise the different shape of seam hole body, various combination mode and different filling operations etc. by the levels of precision that seam hole model is set up; This standard ununified at present, is difficult to the truth of simulate formation.Therefore scale-up factor calculates is not very accurate, increases FRACTURE PREDICTION cost in early stage, reduces the accuracy of FRAC.
Summary of the invention
For defect of the prior art, the invention solves the problem that the reservoir reserves precision of prediction of carbonate rock fractured cave is low.
In order to solve above technical matters, the bearing calibration of carbonate rock fractured cave reservoir reserves, comprising:
Sample well is set up in effective carbonate rock fractured cave reservoir area; According to the actual amount of adopting and the reservoir parameter of this sample well, obtain reservoir volume correction coefficient; According to described reservoir volume correction coefficient, the reserves in described effective carbonate rock fractured cave reservoir area are corrected.
Preferably, described in effective carbonate rock fractured cave reservoir area, set up the step of sample well before also comprise: according to the reservoir distribution in this region of seismic inversion data prediction of carbonate rock fractured cave reservoir area to be submitted; The well logging interpretation of carbonate rock fractured cave reservoir area described to be submitted and the characteristic of described reservoir distribution are crossed, obtains effective carbonate rock fractured cave reservoir area.
Preferably, the parameter of described well logging interpretation comprises: one or more in depth side direction resistivity, depth side direction resistivity ratio, factor of porosity, fracture porosity; The characteristic of described reservoir distribution comprises: wave impedance value.
Preferably, the step of the reservoir distribution in this region of seismic inversion data prediction of described basis carbonate rock fractured cave to be submitted reservoir area comprises: the geological data gathering carbonate rock fractured cave reservoir area to be submitted; Carry out question of seismic wave impedance inversion according to described geological data, obtain the seismic impedance value invert data of carbonate rock fractured cave reservoir area to be submitted.
Preferably, the well logging interpretation of carbonate rock fractured cave reservoir area described to be submitted and the characteristic of described reservoir distribution are crossed, the step obtaining effective carbonate rock fractured cave reservoir area comprises: according to the well logging interpretation of carbonate rock fractured cave reservoir area described to be submitted, determine net porosity; Described net porosity and described wave impedance value are crossed, determines wave impedance threshold value; According to described wave impedance threshold value and described seismic impedance value invert data, obtain effective carbonate rock fractured cave reservoir distribution region.
Preferably, described net porosity is 1.8%.
Preferably, the described actual amount of adopting according to this sample well and reservoir parameter, the step obtaining reservoir volume correction coefficient comprises: according to the reality of this sample well, yield and material balance equation obtain actual excavation volume; According to wave impedance inversion engraving volume and the described actual excavation volume of this sample well, obtain reservoir volume correction coefficient.
Preferably, the described engraving volume of the wave impedance inversion according to this sample well and described actual excavation volume, the step obtaining reservoir volume correction coefficient comprises: carve the actual excavation volume corresponding to volume and many mouthfuls of sample well according to the wave impedance inversion of many mouthfuls of sample well, obtain reservoir volume correction coefficient by compare of analysis.
Preferably, describedly according to described reservoir volume correction coefficient, the step that the reserves in described effective carbonate rock fractured cave reservoir area correct to be comprised: according to the geological data in effective carbonate rock fractured cave reservoir area and wave impedance threshold value, the volume of effective carbonate rock fractured cave reservoir area is carved; Correct carving the measurement reservoir volume obtained according to described reservoir volume correction coefficient.
Preferably, geological data in the effective carbonate rock fractured cave reservoir area of described basis and wave impedance threshold value, the step that the volume of effective carbonate rock fractured cave reservoir area is carved is comprised: according to the geological data in effective carbonate rock fractured cave reservoir area, wave impedance threshold value and net porosity, volume engraving is carried out to effective carbonate rock fractured cave reservoir area
Compared with prior art, above-mentioned embodiment of the present invention has the following advantages: by the reservoir bearing calibration in the present invention, improve the precision of prediction of carbonate rock fractured cave reservoir, decrease the risk and cost in further exploitation work, make the input of exploitation more accurate, thus higher prediction income and exploitation income can be obtained.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, some embodiments of the present invention are described.
Fig. 1 is the schematic diagram of carbonate rock fractured cave reservoir reserves bearing calibration in one embodiment of the present invention;
Fig. 2 is for implementing carbonate rock fractured cave reservoir schematic diagram of the present invention;
Fig. 3 is carbonate rock fractured cave Reservoir Body distribution of impedance diagrammatic cross-section;
Fig. 4 is log well the figure that crosses of seismic impedance value and well logging interpretation active porosity angle value in Kazakhstan 13;
Fig. 5 is log well the figure that crosses of seismic impedance value and well logging interpretation active porosity angle value in Kazakhstan 6.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of the present invention is described.
Fig. 1 is the schematic diagram of carbonate rock fractured cave reservoir reserves bearing calibration in one embodiment of the present invention, and the method comprises the following steps:
Step S101: gather well-log information and seismic data.As Fig. 2, implement shown in carbonate rock fractured cave reservoir schematic diagram of the present invention.In carbonate rock fractured cave reservoir area A(to be submitted or carbonate rock fractured cave reservoir area to be predicted) on carry out the collection of two class data, one class be well-log information (namely, to log well in the A of region the data of C), one class be seismic data (namely, seismic data in the A of region), wherein, well-log information directly obtains by well logging exploration, and seismic data realizes by implementing seismic test collection in region a.Explanation by well-log information obtains well logging FRACTURE CHARACTERISTICS parameter, and FRACTURE CHARACTERISTICS parameter of logging well under normal circumstances comprises: the parameters such as depth side direction resistivity, depth side direction resistivity ratio.And micro resistor FMI(Formation MicroScanner Image can be carried out according to well-log information, FMI), thus by well logging interpretation acquisition pores porosity, fracture porosity, usually the extraction of above well logging FRACTURE CHARACTERISTICS parameter is carried out by reservoir prediction and interpretation software LD-EPS reservoir V5.2, wherein, seismic data can specifically can comprise: prestack road collection data and poststack road collection data.
Step S102: the distribution obtaining carbonate rock fractured cave Reservoir Body.By the seismic data obtained in above-mentioned steps S101, obtain the distribution of the carbonate rock fractured cave Reservoir Body in carbonate rock fractured cave reservoir area A to be submitted.Specifically carry out inverting by treating the geological data submitted in the A of carbonate rock fractured cave reservoir area, obtain the prediction wave impedance of this region A or the distribution of speed, thus obtain the distribution of carbonate rock fractured cave Reservoir Body, as Fig. 3, shown in carbonate rock fractured cave Reservoir Body distribution of impedance diagrammatic cross-section.
Step S103: determine effective carbonate rock fractured cave reservoir distribution region.The well logging interpretation of carbonate rock fractured cave reservoir area A described to be submitted and the characteristic of reservoir distribution are crossed, obtain the wave impedance value corresponding to net porosity, treat according to this value the wave impedance value submitted in the A of carbonate rock fractured cave reservoir area to screen, acquire effective wave impedance region B.Concrete, net porosity can obtain according to the well logging interpretation of the well logging C in carbonate rock fractured cave reservoir area A to be submitted, and net porosity can be preferably greater than 1.8%.Follow-up region factor of porosity being greater than 1.8% with and described wave impedance value cross, acquisition pores porosity is greater than the wave impedance threshold value in the region of 1.8%.Thus, according to this wave impedance threshold value and seismic impedance value invert data, effective carbonate rock fractured cave reservoir distribution region B can be obtained.It crosses as shown in Figure 4,5, and wherein, Fig. 4 is that Kazakhstan 13 wellhole porosity and wave impedance cross figure; Fig. 5 is the figure that crosses for Kazakhstan 6 wellhole porosity and wave impedance.Ordinate is well logging interpretation porosity value, and when net porosity is greater than 1.8%, wave impedance scope is at 12651-15672m.g/cm
3.s.
Step S104: obtain reservoir volume correction coefficient.According to the actual amount of adopting and the reservoir parameter of sample well D, obtain reservoir volume correction coefficient, be specially, first, according to the reality of this sample well D, yield and material balance equation obtain actual excavation volume.Afterwards, according to wave impedance inversion engraving volume and the described actual excavation volume of sample well D, reservoir volume correction coefficient is obtained.Wherein, also reservoir volume correction coefficient is obtained by many mouthfuls of wells.For making the acquisition of above-mentioned correction coefficient more accurate, all right in the step of above-mentioned acquisition reservoir volume correction coefficient: to carve the actual excavation volume corresponding to volume and this many mouthfuls of sample well according to the wave impedance inversion of many mouthfuls of sample well, obtain reservoir volume correction coefficient by compare of analysis.Thus what make correction coefficient obtain is more accurate.
Step S105: carry out reservoir correction.In this step, according to the reservoir volume correction coefficient obtained in above-mentioned steps S104, the reserves in effective carbonate rock fractured cave reservoir area B are corrected.Concrete steps are: according to the geological data in effective carbonate rock fractured cave reservoir area B and wave impedance threshold value, carve the volume of effective carbonate rock fractured cave reservoir area; Correct carving the measurement reservoir volume obtained according to reservoir volume correction coefficient.As: the material balance equation volume relationship of 3 mouthfuls of wells such as 12 of breathing out in 6 regional wave impedance inversion body volume computing and this district according to example and breathe out 7, breathe out 11, breathe out contrasts, and determines that scale-up factor is 0.358, and then corrects wave impedance inversion reservoir volume.As shown in table 1, be the comparative analysis table that reservoir corrects.
Table 1 material balance equation and wave impedance inversion body carve volume vs's analytical table
Step S106: carry out reservoir engraving.According to the geological data in effective carbonate rock fractured cave reservoir area B and wave impedance threshold value, to the step that the volume of effective carbonate rock fractured cave reservoir area is carved be: first, ADES software can be utilized, according to above-mentioned Wave Impedance Data Volume and determined threshold value, calculate engraving volume, as, it is 107481.6 ten thousand sides that engraving example blocks breathes out 6 full areal coverage volumes.Afterwards, according to the volume correction factor of material balance equation, revise the volume of engraving.I.e. 107481.6 ten thousand sides × 0.358=38478.413 ten thousand side, as the volume number finally submitted.
Thus by the reservoir bearing calibration in the present invention, improve the precision of prediction of carbonate rock fractured cave reservoir, decrease the risk and cost in further exploitation work, make the input of exploitation more accurate, thus higher prediction income and exploitation income can be obtained.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention can by hardware implementing, and the mode that also can add necessary general hardware platform by software realizes.Based on such understanding, technical scheme of the present invention can embody with the form of software product, it (can be CD-ROM that this software product can be stored in a non-volatile memory medium, USB flash disk, portable hard drive etc.) in, comprise some instructions and perform method described in each embodiment of the present invention in order to make a computer equipment (can be personal computer, server, or the network equipment etc.).
It will be appreciated by those skilled in the art that accompanying drawing is the schematic diagram of a preferred embodiment, the module in accompanying drawing or flow process might not be that enforcement the present invention is necessary.
It will be appreciated by those skilled in the art that the module in the device in embodiment can carry out being distributed in the device of embodiment according to embodiment description, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
The invention described above embodiment sequence number, just to describing, does not represent the quality of embodiment.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (10)
1. carbonate rock fractured cave reservoir reserves bearing calibration, comprising:
Sample well is set up in effective carbonate rock fractured cave reservoir area;
According to the actual amount of adopting and the reservoir parameter of this sample well, obtain reservoir volume correction coefficient;
According to described reservoir volume correction coefficient, the reserves in described effective carbonate rock fractured cave reservoir area are corrected.
2. the method for claim 1, described in effective carbonate rock fractured cave reservoir area, set up the step of sample well before also comprise:
According to the reservoir distribution in this region of seismic inversion data prediction of carbonate rock fractured cave reservoir area to be submitted;
The well logging interpretation of carbonate rock fractured cave reservoir area described to be submitted and the characteristic of described reservoir distribution are crossed, obtains effective carbonate rock fractured cave reservoir area.
3. method as claimed in claim 2, the parameter of described well logging interpretation comprises: one or more in depth side direction resistivity, depth side direction resistivity ratio, factor of porosity, fracture porosity; The characteristic of described reservoir distribution comprises: wave impedance value.
4. method as claimed in claim 2 or claim 3, the step of the reservoir distribution in this region of seismic inversion data prediction of described basis carbonate rock fractured cave reservoir area to be submitted comprises:
Gather the geological data of carbonate rock fractured cave reservoir area to be submitted;
Carry out question of seismic wave impedance inversion according to described geological data, obtain the seismic impedance value invert data of carbonate rock fractured cave reservoir area to be submitted.
5. the method as described in claim 3 or 4, crosses the well logging interpretation of carbonate rock fractured cave reservoir area described to be submitted and the characteristic of described reservoir distribution, and the step obtaining effective carbonate rock fractured cave reservoir area comprises:
According to the well logging interpretation of carbonate rock fractured cave reservoir area described to be submitted, determine net porosity;
Described net porosity and described wave impedance value are crossed, determines wave impedance threshold value;
According to described wave impedance threshold value and described seismic impedance value invert data, obtain effective carbonate rock fractured cave reservoir distribution region.
6. method as claimed in claim 5, described net porosity is 1.8%.
7. the method for claim 1, the described actual amount of adopting according to this sample well and reservoir parameter, the step obtaining reservoir volume correction coefficient comprises:
According to the reality of this sample well, yield and material balance equation obtain actual excavation volume;
According to wave impedance inversion engraving volume and the described actual excavation volume of this sample well, obtain reservoir volume correction coefficient.
8. method as claimed in claim 7, the described engraving volume of the wave impedance inversion according to this sample well and described actual excavation volume, the step obtaining reservoir volume correction coefficient comprises:
Carve the actual excavation volume corresponding to volume and many mouthfuls of sample well according to the wave impedance inversion of many mouthfuls of sample well, obtain reservoir volume correction coefficient by compare of analysis.
9. the method for claim 1, describedly comprises the step that the reserves in described effective carbonate rock fractured cave reservoir area correct according to described reservoir volume correction coefficient:
According to the geological data in effective carbonate rock fractured cave reservoir area and wave impedance threshold value, the volume of effective carbonate rock fractured cave reservoir area is carved;
Correct carving the measurement reservoir volume obtained according to described reservoir volume correction coefficient.
10. method as claimed in claim 9, the geological data in the effective carbonate rock fractured cave reservoir area of described basis and wave impedance threshold value, comprise the step that the volume of effective carbonate rock fractured cave reservoir area is carved:
According to the geological data in effective carbonate rock fractured cave reservoir area, wave impedance threshold value and net porosity, volume engraving is carried out to effective carbonate rock fractured cave reservoir area.
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| CN105676294A (en) * | 2016-04-19 | 2016-06-15 | 中国石油化工股份有限公司 | Carbonate fractured-vuggy reservoir body quantitative description method |
| CN106096081A (en) * | 2016-05-30 | 2016-11-09 | 恒泰艾普（北京）能源科技研究院有限公司 | The estimation method of reserve of seam hole type bottom water reservoir |
| CN108241170A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | Carbonate reservoir fracture hole carves volume and dynamic holdup approximating method and device |
| CN110857625A (en) * | 2018-08-14 | 2020-03-03 | 中国石油天然气股份有限公司 | Method, device and equipment for acquiring reserve of closed water body fracture-cave unit of carbonate rock |
| CN110941027A (en) * | 2018-09-21 | 2020-03-31 | 潜能恒信能源技术股份有限公司 | Method and system for calculating carbonate karst etching hole type geothermal energy reserves |
| CN110941028A (en) * | 2018-09-21 | 2020-03-31 | 潜能恒信能源技术股份有限公司 | Method and system for positioning carbonate karst etching hole type geothermal energy reservoir |
| CN113376693A (en) * | 2021-05-26 | 2021-09-10 | 中国石油天然气股份有限公司 | Strong-heterogeneity carbonate rock high-quality reservoir distribution prediction method and system |
| CN113759419A (en) * | 2020-06-04 | 2021-12-07 | 中国石油化工股份有限公司 | Reservoir prediction method and device, storage medium and electronic equipment |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105676294A (en) * | 2016-04-19 | 2016-06-15 | 中国石油化工股份有限公司 | Carbonate fractured-vuggy reservoir body quantitative description method |
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| CN106096081A (en) * | 2016-05-30 | 2016-11-09 | 恒泰艾普（北京）能源科技研究院有限公司 | The estimation method of reserve of seam hole type bottom water reservoir |
| CN106096081B (en) * | 2016-05-30 | 2019-08-06 | 恒泰艾普（北京）能源科技研究院有限公司 | The estimation method of reserve of fracture hole type bottom water reservoir |
| CN108241170A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | Carbonate reservoir fracture hole carves volume and dynamic holdup approximating method and device |
| CN108241170B (en) * | 2016-12-27 | 2020-01-03 | 中国石油天然气股份有限公司 | Method and device for fitting carved volume and dynamic reserve of fractured-vuggy carbonate reservoir |
| CN110857625A (en) * | 2018-08-14 | 2020-03-03 | 中国石油天然气股份有限公司 | Method, device and equipment for acquiring reserve of closed water body fracture-cave unit of carbonate rock |
| CN110941027A (en) * | 2018-09-21 | 2020-03-31 | 潜能恒信能源技术股份有限公司 | Method and system for calculating carbonate karst etching hole type geothermal energy reserves |
| CN110941028A (en) * | 2018-09-21 | 2020-03-31 | 潜能恒信能源技术股份有限公司 | Method and system for positioning carbonate karst etching hole type geothermal energy reservoir |
| CN110941027B (en) * | 2018-09-21 | 2022-03-22 | 潜能恒信能源技术股份有限公司 | Method and system for calculating carbonate karst etching hole type geothermal energy reserves |
| CN110941028B (en) * | 2018-09-21 | 2022-03-25 | 潜能恒信能源技术股份有限公司 | Method and system for positioning carbonate karst etching hole type geothermal energy reservoir |
| CN113759419A (en) * | 2020-06-04 | 2021-12-07 | 中国石油化工股份有限公司 | Reservoir prediction method and device, storage medium and electronic equipment |
| CN113376693A (en) * | 2021-05-26 | 2021-09-10 | 中国石油天然气股份有限公司 | Strong-heterogeneity carbonate rock high-quality reservoir distribution prediction method and system |
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