CN106873032A - A kind of granite hill reservoir crack prediction method - Google Patents

A kind of granite hill reservoir crack prediction method Download PDF

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Publication number
CN106873032A
CN106873032A CN201710083193.5A CN201710083193A CN106873032A CN 106873032 A CN106873032 A CN 106873032A CN 201710083193 A CN201710083193 A CN 201710083193A CN 106873032 A CN106873032 A CN 106873032A
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ridge
ditch
line
buried hill
top surface
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CN106873032B (en
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胡光义
宋来明
范廷恩
梁旭
潘晓庆
汤婧
王晖
周建楠
牛涛
聂妍
许磊
刘向南
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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China National Offshore Oil Corp CNOOC
CNOOC Research Institute Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01VGEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/28Processing seismic data, e.g. for interpretation or for event detection
    • G01V1/30Analysis
    • G01V1/306Analysis for determining physical properties of the subsurface, e.g. impedance, porosity or attenuation profiles

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

The present invention relates to a kind of granite hill reservoir crack prediction method, it is characterised in that comprise the following steps:1) paleogeographic reconstruction is carried out to target area buried hill top surface;2) the buried hill top surface after being evened up to last time, i.e. buried hill ancient landform, interpolation generation ancient landform contour map;3) buried hill ancient landform " ditch " and " ridge " are identified;4) " ditch " and " ridge " distributed areas are portrayed and is extracted;5) fracture development area is predicted.The present invention is directed to Granite Reservoir FRACTURE PREDICTION, " ditch " and " ridge " identification and extraction relatively high, relatively low using buried hill ancient landform is represented, come Prediction of fracture area, and during employ Vector triangle and identify ancient landform " ditch " and " ridge " one by one, make the prediction regulation and standardization of " ditch " and " ridge ", the more traditional Geological working method of FRACTURE PREDICTION workload is greatly reduced.

Description

A kind of granite hill reservoir crack prediction method
Technical field
It is particularly a kind of to be directed to granite hill reservoir crack prediction method the present invention relates to a kind of crack prediction method.
Background technology
The history of the domestic research on fracture-type reservoir existing decades, was basically limited to before the nineties in 20th century Traditional geological method, the only recognition methods in the source investigation crack from well in itself;And in the world, main oil company encloses Substantial amounts of tackling key problem research or is carried out around crack.Recent years, petrochina exploration and development research institute constitutes a bag The multidisciplinary crack research project group of geology, well logging, earthquake and reservoir engineering expert is included, by summarizing domestic and international more than ten cracks Property oil reservoir exploration and development practice, explore a set of comprehensive crack identification and forecast of distribution geologic assessment technology.Generally speaking, Crack characterizes the synthesis that Research Thinking is gradually intended to multi-specialized, multiple dimensioned, many technological means, i.e., studied using outcrop, Crack observation, the description of rock core crack, identifying fracture in well logging, Seismic Fracture identification, Rock Mechanics Test, stress field research etc. are various Method, with reference to various specialties such as earthquake, well logging, geology, oil reservoir, using the multiple means such as qualitative, Semi-qualitative, quantitative, integrates grand Various yardsticks such as sight, microcosmic, take the number of ways such as numerical simulation, physical analogy, comprehensive to determine that description and prediction Fractured are stored up Layer spread.But, because fractue spacing is extremely complex, research difficulty is big, and it is described and prediction is difficult point, the heat of petroleum industrial circle Point.Wherein, the objective description of intrinsic fracture development degree, is the basis of crack description and prediction.
The content of the invention
Regarding to the issue above, it is an object of the invention to provide a kind of granite hill reservoir crack prediction method.
To achieve the above object, the present invention takes following technical scheme:A kind of granite hill reservoir crack prediction method, It is comprised the following steps:
1) buried hill top surface paleogeographic reconstruction
Paleogeographic reconstruction is carried out to target area buried hill top surface using tradition stratum flattening technique:
Target area buried hill top surface is successively evened up from top to bottom, gradually reflects buried hill top surface landforms by newly to old change Change;The interfaces at different levels of flattening are each stratum in buried hill overlying sediments stratum " group ", " section " top surface, and foot interface (represents most Buried hill top surface after evening up in early days) reflects landform shape of the buried hill before receiving to deposit, and this change procedure is reflected respectively Period buried hill top surface the changing of physiognomy situation, that is, reflect the historical process of Landform Evolution.
2) buried hill ancient landform contour compilation
Buried hill top surface after being evened up to last time, i.e. buried hill ancient landform, interpolation generation ancient landform contour map.
3) buried hill ancient landform " ditch " and " ridge " are recognized
On the ancient landform of buried hill, relatively a height of " ridge ", relatively low is " ditch ".Relatively high, relatively low judgement uses triangle Shape rule:(1) adjacent three points of connection landform turnover, form triangle;(2) with minimum with horizontal line angle in triangle On the basis of side, when the 3rd summit is located on the side, the position of the 3rd point represents palaeogeomorphic " ridge ";(3) when the 3rd Individual summit is located at when under the side, and the position of the 3rd point represents palaeogeomorphic " ditch ".Using above-mentioned Vector triangle, can be by One identifies buried hill palaeogeomorphic " ditch " and " ridge ".
4) " ditch " and " ridge " distributed areas being portrayed and extracting
Buried hill ancient landform is a rugged curved surface, portrays and extracts on curved surface " ditch " and the step of " ridge " distributed areas It is as follows:
A. main " ditch " and " ridge " side of trend in working region (region in crack to be predicted, hereinafter referred to as working region) is determined To;
B. since the one side of working region, perpendicular to main " ditch " and " ridge " trend, the 1st any line is drawn;
C. each terrain transition point on any line is determined;
D. judge that each terrain transition point is " ditch " or " ridge " on any line using Vector triangle;
E. parallel to the 1st any line, the 2nd any line is drawn with 50m distances, repeat step a~d determines that the 2nd is appointed " ditch " and " ridge " on meaning line.The 3rd is drawn successively, the 4th any line ... determine until working region another side respectively " ditch " and " ridge " on each any line;
F. " ditch " and " ridge " on above-mentioned any line is added on the top surface paleogeomorphological map of buried hill;
G. using buried hill top surface paleogeomorphological map as auxiliary, " ditch " and " ridge " on any line of each bar is sequentially connected, is formed " ditch " and " ridge " line distribution map;
H. " ditch " and " ridge " distributed areas are determined:Centered on " ditch " line, both sides are with the center line of " ditch " and " ridge " line Boundary, limits scope as buried hill top surface ancient landform " ditch " distributed areas;Centered on " ridge " line, both sides are with " ridge " and " ditch " line Center line is boundary, limits scope as buried hill top surface ancient landform " ridge " distributed areas.
5) fracture developing zone prediction
More than hundreds of microns of large fracture is developed in " ditch " distributed areas of buried hill top surface landforms, quantity be generally 2~8/ m;The gap below hundreds of microns is developed in " ridge " distributed areas, and quantity is generally tens of~hundreds of/m, " ridge " distributed areas As favourable fracture reservoir development area.
Due to taking above technical scheme, it has advantages below to the present invention:1st, the present invention is directed to Granite Reservoir crack Prediction, using representing " ditch " and " ridge " identification relatively high, relatively low of buried hill ancient landform and extracting, comes Prediction of fracture area, And during employ Vector triangle and identify ancient landform " ditch " and " ridge " one by one, make the prediction specification of " ditch " and " ridge " Change, standardize.2nd, the present invention by way of any line, realize in working region " ditch " and " ridge " distribution portray with Extract, the prediction of fracture developing zone is realized, with stronger operability, to user almost without skill requirement.3rd, the present invention Due to using procedure, standardized working method, the more traditional Geological working method of FRACTURE PREDICTION workload being greatly reduced.
Brief description of the drawings
Fig. 1 is the Reservoir Fractures result figure based on the description of paleostructure ditch ridge in the embodiment of the present invention.
In figure:"+" represents paleostructure high point, and "/" represents any line, and " " represents triangle fixed point (ditch), and " " represents triangle Shape summit (ridge),Paleostructure contour is represented,Paleostructure ditch line is represented,Paleostructure crestal line is represented,Paleostructure ditch region is represented,Represent paleostructure ridge region.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples.It should be appreciated, however, that the offer of accompanying drawing is only For a better understanding of the present invention, they should not be interpreted as limitation of the present invention.
A kind of granite hill reservoir crack prediction method that the present invention is provided, it is comprised the following steps (by taking P oil fields as an example Illustrate):
1) buried hill top surface paleogeographic reconstruction
Paleogeographic reconstruction is carried out using tradition stratum flattening technique.
P oilfield buried hills top surface is successively evened up from top to bottom using one section of Guantao group, bright hypomere as interface is evened up, bright hypomere Landforms after interface is evened up represent buried hill top surface, the buried hill in Guantao described in the presedimentary landform shape of group, i.e. the present embodiment Ancient landform.
2) buried hill ancient landform contour compilation
To buried hill ancient landform, interpolation generation ancient landform contour map.
3) buried hill ancient landform " ditch " and " ridge " are recognized
On the ancient landform of buried hill, relatively a height of " ridge ", relatively low is " ditch ".Relatively high, relatively low judgement uses triangle Shape rule:(1) adjacent three points of connection landform turnover, form triangle;(2) with minimum with horizontal line angle in triangle On the basis of side, when the 3rd summit is located on the side, the position of the 3rd point represents palaeogeomorphic ridge;(3) when the 3rd Summit is located at when under the side, and the position of the 3rd point represents palaeogeomorphic ditch.Using the Vector triangle, can recognize one by one Go out P oilfield buried hills ancient landform " ditch " and " ridge ".
4) " ditch " and " ridge " scope being portrayed and extracting
The pickup step of P oilfield buried hills ancient landform " ditch " " ridge " distributed areas is as follows:
A. determine that main " ditch " and " ridge " moves towards direction in working region;
B. since the one side of working region, perpendicular to main " ditch " and " ridge " trend, the 1st any line R1 is drawn;
C. each terrain transition point (totally three points) on any line is determined;
D. judge that 3 terrain transition points are " ditch " or " ridge ", triangular apex on any line using Vector triangle (ditch) is represented with open circles, and triangular apex (ridge) is represented with filled circles;
E. parallel to the 1st any line, the 2nd any line is drawn with 50m distances, the 2nd is determined arbitrarily by a~d methods " ditch " and " ridge " on line.The 3rd is drawn successively, the 4th any line ... determine each until working region another side respectively " ditch " and " ridge " on any line;
F. " ditch " and " ridge " on above-mentioned any line is added on paleogeomorphological map;
G. using paleogeomorphological map as auxiliary, " ditch " and " ridge " on any line of each bar is sequentially connected (and by filled circles and Open circles distribution is coupled together), (ditch line is open circles line, and crestal line is that filled circles connect for formation " ditch " and " ridge " line distribution map Line);
H. ditch ridge distribution is determined:Centered on " ditch " line, both sides are boundary with the center line of " ditch " and " ridge " line, are limited Scope is determined for buried hill ancient landform " ditch " region (i.e. * fill areas);Centered on " ridge " line, both sides are with " ridge " and " ditch " line Center line is boundary, limits scope as buried hill ancient landform " ridge " region (oblique dotted line fill area).
5) FRACTURE PREDICTION
Ancient landform " ditch " region is this oil field large fracture development area, and quantity is generally 2~8/m;" ridge " region is this oil The owner of farmland wants reservoir fissure development area, is principal character to develop the gap below hundreds of microns, and fracture spacing is big, and quantity is general It is tens of~hundreds of/m.
The various embodiments described above are merely to illustrate the present invention, wherein the structure of each part, connected mode and manufacture craft etc. are all Can be what is be varied from, every equivalents carried out on the basis of technical solution of the present invention and improvement should not be excluded Outside protection scope of the present invention.

Claims (5)

1. a kind of granite hill reservoir crack prediction method, it is characterised in that comprise the following steps:
1) paleogeographic reconstruction is carried out to target area buried hill top surface;
2) the buried hill top surface after being evened up to last time, i.e. buried hill ancient landform, interpolation generation ancient landform contour map;
3) buried hill ancient landform " ditch " and " ridge " are identified;
4) " ditch " and " ridge " distributed areas are portrayed and is extracted;
5) fracture development area is predicted.
2. a kind of granite hill reservoir crack prediction method as claimed in claim 1, it is characterised in that above-mentioned steps 1) in Paleogeographic reconstruction is carried out using tradition stratum flattening technique, i.e., target area buried hill top surface is successively evened up from top to bottom, gradually instead Buried hill top surface landforms are reflected by newly to old change;The interfaces at different levels of flattening be each stratum in buried hill overlying sediments stratum " group ", " section " top surface, the buried hill top surface after foot interface is evened up reflects landform shape of the buried hill before receiving to deposit.
3. a kind of granite hill reservoir crack prediction method as claimed in claim 1, it is characterised in that above-mentioned steps 3) in Identify buried hill palaeogeomorphic " ditch " and " ridge " one by one using Vector triangle:(1) adjacent three points of connection landform turnover, shape Triangularity;(2) on the basis of side minimum with horizontal line angle in triangle, when the 3rd summit is located on the side, the The position of three points represents palaeogeomorphic " ridge ";(3) when the 3rd summit is located under the side, the 3rd position generation of point Table palaeogeomorphic " ditch ".
4. a kind of granite hill reservoir crack prediction method as claimed in claim 1, it is characterised in that above-mentioned steps 4) in Portray and extract on curved surface " ditch " and the step of " ridge " distributed areas it is as follows:
A. determine that main " ditch " and " ridge " moves towards direction in the region in crack to be predicted;
B. since the region one side in crack to be predicted, perpendicular to main " ditch " and " ridge " trend, the 1st any line is drawn;
C. each terrain transition point on any line is determined;
D. judge that each terrain transition point is " ditch " or " ridge " on any line using Vector triangle;
E. parallel to the 1st any line, the 2nd any line is drawn with 50m distances, repeat step a~d determines the 2nd any line On " ditch " and " ridge ";Draw successively the 3rd, the 4th any line ... until the region another side in crack to be predicted, and respectively Determine " ditch " and " ridge " on each any line;
F. " ditch " and " ridge " on above-mentioned any line is added on the top surface paleogeomorphological map of buried hill;
G. using buried hill top surface paleogeomorphological map as auxiliary, " ditch " and " ridge " on any line of each bar is sequentially connected, is formed " ditch " " ridge " line distribution map;
H. " ditch " and " ridge " distributed areas are determined:Centered on " ditch " line, both sides with the center line of " ditch " and " ridge " line be boundary, institute Limit scope as buried hill top surface ancient landform " ditch " distributed areas;Centered on " ridge " line, both sides are with the center of " ridge " and " ditch " line Line is boundary, limits scope as buried hill top surface ancient landform " ridge " distributed areas.
5. a kind of granite hill reservoir crack prediction method as claimed in claim 1, it is characterised in that above-mentioned steps 5) in The principle of prediction is:More than hundreds of microns of large fracture is developed in " ditch " distributed areas of buried hill top surface landforms, and quantity is generally 2~ 8/m;The gap below hundreds of microns is developed in " ridge " distributed areas, and quantity is generally tens of~hundreds of/m, " ridge " distribution Region is favourable fracture reservoir development area.
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CN107664772A (en) * 2017-07-28 2018-02-06 核工业北京地质研究院 A kind of Forecasting Methodology for sandstone-type uranium mineralization with respect favorab1e sandbadies and Favorable Zones
CN108267783A (en) * 2018-01-02 2018-07-10 中国石油天然气集团公司 A kind of method, apparatus and system of determining buried-hill trap
CN109283578A (en) * 2018-01-22 2019-01-29 中国石油天然气股份有限公司 Determine the method and device of the position for hydrocarbon window in buried hill
CN113433589A (en) * 2021-08-03 2021-09-24 成都理工大学 Weathered crust reservoir bottom interface identification method based on mathematical statistics
CN114019565A (en) * 2021-11-02 2022-02-08 中海石油(中国)有限公司 Rapid pre-stack crack prediction method and device, computer storage medium and equipment
CN114265116A (en) * 2022-03-02 2022-04-01 中海油研究总院有限责任公司 Quantitative statistical method and device for channel and ridge amplitude of buried hill weathering crust of granite
CN114594529A (en) * 2020-12-07 2022-06-07 中国石油化工股份有限公司 Method for predicting buried hill reservoir based on azimuth seismic attribute change rate

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107664772A (en) * 2017-07-28 2018-02-06 核工业北京地质研究院 A kind of Forecasting Methodology for sandstone-type uranium mineralization with respect favorab1e sandbadies and Favorable Zones
CN107664772B (en) * 2017-07-28 2019-08-13 核工业北京地质研究院 A kind of prediction technique for sandstone-type uranium mineralization with respect favorab1e sandbadies and Favorable Zones
CN108267783A (en) * 2018-01-02 2018-07-10 中国石油天然气集团公司 A kind of method, apparatus and system of determining buried-hill trap
CN109283578A (en) * 2018-01-22 2019-01-29 中国石油天然气股份有限公司 Determine the method and device of the position for hydrocarbon window in buried hill
CN109283578B (en) * 2018-01-22 2020-07-10 中国石油天然气股份有限公司 Method and device for determining the position of a hydrocarbon supply window of a submerged hill
CN114594529A (en) * 2020-12-07 2022-06-07 中国石油化工股份有限公司 Method for predicting buried hill reservoir based on azimuth seismic attribute change rate
CN114594529B (en) * 2020-12-07 2023-12-01 中国石油化工股份有限公司 Method for predicting reservoir of buried hill based on azimuth seismic attribute change rate
CN113433589A (en) * 2021-08-03 2021-09-24 成都理工大学 Weathered crust reservoir bottom interface identification method based on mathematical statistics
CN114019565A (en) * 2021-11-02 2022-02-08 中海石油(中国)有限公司 Rapid pre-stack crack prediction method and device, computer storage medium and equipment
CN114019565B (en) * 2021-11-02 2023-10-13 中海石油(中国)有限公司 Rapid prestack crack prediction method, rapid prestack crack prediction device, computer storage medium and computer storage device
CN114265116A (en) * 2022-03-02 2022-04-01 中海油研究总院有限责任公司 Quantitative statistical method and device for channel and ridge amplitude of buried hill weathering crust of granite
CN114265116B (en) * 2022-03-02 2022-05-17 中海油研究总院有限责任公司 Quantitative statistical method and device for channel and ridge amplitude of granite buried hill weathering crust

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