CN101788686B - Point-by-point excitation well depth designing method based on uniform near-surface model - Google Patents

Point-by-point excitation well depth designing method based on uniform near-surface model Download PDF

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CN101788686B
CN101788686B CN201010011424XA CN201010011424A CN101788686B CN 101788686 B CN101788686 B CN 101788686B CN 201010011424X A CN201010011424X A CN 201010011424XA CN 201010011424 A CN201010011424 A CN 201010011424A CN 101788686 B CN101788686 B CN 101788686B
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data
point
lithology
speed
well depth
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CN101788686A (en
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杨晶
张光德
段卫星
刘斌
徐维秀
罗英伟
任宏沁
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China Petrochemical Corp Shengli Offshore Drilling Co Geophysics Exploration And Develop
China Petrochemical Corp
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China Petrochemical Corp Shengli Offshore Drilling Co Geophysics Exploration And Develop
China Petrochemical Corp
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Abstract

The invention discloses a point-by-point excitation well depth designing method based on a uniform near-surface model. The method comprises the following steps of: A. performing unite interpretation to the test data obtained by three methods of lithologic coring, cone penetration test and micro logging lithologic calibration, and obtaining optimum lithologic hierarchical boundary; B. performing unite interpretation to the micro logging and small refraction text data, and obtaining optimum speed hierarchical data; C. classifying and editing the obtained speed hierarchical data, lithologic data, speed, absorption attenuation Q value, water table position, and well data; loading the speed hierarchical data, lithologic, water table position data after transforming to position data format; loading the well data by using a self-defined data format; re-loading the generated excitation well depth scatter data into the system, generating CGM format isogram, and drawing by using a plotter. The invention can optimize the excitation well depth design, enhance the signal-to-noise ratio of the earthquake collecting single-shot record, and greatly improve the information quality.

Description

Point-by-point excitation well depth designing method based on uniform near-surface model
Technical field
The invention discloses a kind of oil seismic exploration technology, particularly a kind of point-by-point excitation well depth designing method based on uniform near-surface model.
Background technology
In oil seismic exploration, near-surface model is a very important basic data.Especially in earthquake-capturing, consider the attenuation by absorption of seismic event, need powder column to get into high-velocity bed and excite, simultaneously, also should guarantee the best lithology that excites,, improve the quality of seismic data greatly to improve the single shot record signal to noise ratio (S/N ratio).Though the near surface investigation method is a lot of at present, do not set up the analysis-by-synthesis means of these data, therefore can't set up a uniform near-surface model based on the constraint of multiattributes such as the degree of depth, speed, lithology, attenuation by absorption Q value.
General excitation well depth designing method all is the interpretation results according to little refraction, micro logging, calculates a fixing excitation well depth, perhaps utilizes linear interpolation method to calculate several excitation well depths and is applied to full work area.Along with high precision and secondary acquisition project implementation, increasingly high to the shooting conditions requirement, require to take all factors into consideration multiple geological property, set up near-surface model, and realize pointwise design excitation well depth based on the unanimity of polynary parameter.
Existing earthquake collection method is all set up the deep layer model, and is meticulous inadequately to top layer portrayal, the three-dimensional model Presentation Function very a little less than, can not load a plurality of attribute datas, especially can't pointwise calculate excitation well depth numerical value.Can not satisfy open-air production and the scientific research needs.
Summary of the invention
The object of the present invention is to provide a kind of point-by-point excitation well depth designing method based on uniform near-surface model; Overcome prior art and can't set up comprehensive uniform near-surface model; And can't realize point-by-point excitation well depth status of design based on meticulous consistent model; Thereby solve because open-air excitation well depth numerical value is inaccurate, cause the signal to noise ratio (S/N ratio) and the lower problem of resolution of seismic data.
For solving the problems of the technologies described above, the present invention provides a kind of point-by-point excitation well depth designing method based on uniform near-surface model, and this method may further comprise the steps:
A, to lithology core, static sounding and micro logging lithology demarcate the test figure that three kinds of methods obtain and carry out joint interpretation, obtains best lithology layering interfaces;
B, micro logging and little refraction test figure are carried out joint interpretation, obtain the optimum velocity individual-layer data;
C, with the speed individual-layer data, lithology data and the speed that obtain, attenuation by absorption Q value, water table position, well data qualification editor; Speed individual-layer data, lithology, water table position data conversion stratification bit data form are loaded; Load for the self-defining data layout of well The data; The well data of an attribute compile to(for) speed and attenuation by absorption Q Value Data loads;
D, the lithology individual-layer data that obtains after the joint interpretation, speed individual-layer data and water table are carried out gridding, the generating mesh data as the position point data of loosing;
E, utilize the binary tree method, generate the screen work model based on block modeling;
F, curved surface is edited, eliminated singular point, level and smooth aspect according to the relative position relation of attribute data and mutual restriction relation;
G, load well data, speed data, attenuation by absorption Q value then, the final uniform near-surface model that generates based on polynary parameter;
The boundary scope that H, calculating optimum excite lithology, water table, speed layering interfaces excites the position as the best of excitation well depth;
I, the best that explanation is obtained excite the position to regard a layer bit data processing, it is loose according to the field construction designing requirement reveal, and this diffusing point data is the excitation well depth of open-air each shot point;
J, write the data-interface program, the excitation well depth numerical value of each point is exported with form;
K, the excitation well depth that the generates point data of loosing is reloaded into system, generate CGM form isogram, utilize plotting apparatus to draw.
Wherein said plotting apparatus is drawn CGM form isogram and adopted following method: the CGM PaintShop is handled, and with little delta pattern labeling position, and shows the depth value at this some place, and the achievement map after the processing utilizes third party software to draw at plotting apparatus.
The present invention has following beneficial effect: through the speed individual-layer data that micro logging and little refraction joint interpretation are obtained; Lithology is cored, static sounding and micro logging lithology are demarcated the lithology individual-layer data that joint interpretation obtains; Speed, water table and attenuation by absorption Q value are carried out joint interpretation, and utilize explanation results to set up the near-surface model based on the unanimity of multiattribute constraint; And pointwise designs excitation well depth on this model; Thereby optimize the excitation well depth design, improve the single shot record signal to noise ratio (S/N ratio), improve data quality largely.
Description of drawings
Fig. 1 is a treatment scheme synoptic diagram of the present invention; 1 is that step 1,2 is that step 2,3 is that step 3,4 is that step 4,5 is step 5 among the figure.
The near-surface model synoptic diagram that Fig. 2 sets up for the present invention; A is that lithology slice map layer bit model, b are that lithology slice map phantom type, c are that lithology layering and low velocity layer figure, e are the interpretation results comparison diagram of lithology data and micro logging data among the figure.
Point-by-point excitation well depth design and well depth numerical evaluation synoptic diagram that Fig. 3 sets up for the present invention; E is that position coordinates shows among the figure, f is that to excite well location curved surface, g be that shot point landscape position, h are that excitation well depth calculates and output to the best.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to further explain of the present invention.
The point-by-point excitation well depth designing method of this uniform near-surface model based on polynary parameter of the present invention, the degree of depth, speed, lithology, the attenuation by absorption Q Value Data that have utilized the near surface investigation to obtain, the inner link that itself has; Its achievement data of joint interpretation are set up comprehensive consistent near surface refined model, and pointwise designs excitation well depth on this model; And this numerical applications produced in the field, optimize the well depth design, improve shooting conditions; Improve single big gun signal to noise ratio (S/N ratio), improve data quality.
Embodiment one
The treatment scheme synoptic diagram that Fig. 1 provides for the embodiment of the invention based on a preferred embodiment of the point-by-point excitation well depth designing method of uniform near-surface model.This schematic flow sheet may further comprise the steps:
Step 1, to lithology core, static sounding and micro logging lithology demarcate the test figure that three kinds of methods obtain and carry out joint interpretation, obtains best lithology individual-layer data; Joint interpretation micro logging and little refraction test figure obtain the optimum velocity individual-layer data.Wherein, the purpose of this step realizes the joint interpretation of near surface survey data, obtains best lithology individual-layer data and speed individual-layer data, for setting up uniform near-surface model basic data is provided.
Step 2, write the data transformation interface program, realize loading multiple attribute data.At first with above-mentioned speed individual-layer data, lithology data and the speed that obtains, attenuation by absorption Q value, water table position, well data qualification editor.Speed individual-layer data, lithology, water table position data conversion stratification bit data form are loaded; Load for the self-defining data layout of well The data; The well data of an attribute compile to(for) speed and attenuation by absorption Q Value Data loads.Wherein, the purpose of this step is that near surface enquiry data with different attribute loads into.The data-interface program is write corresponding transcode according to data type and form, finally converts the internal format that modeling software can be discerned to.
Step 3, with the diffusing point data gridding in layer position after the joint interpretation, generating mesh data; Utilize the binary tree method based on block modeling again, generate the screen work model, and curved surface is edited according to the relative position relation of attribute data and mutual restriction relation; Load well data, speed data, attenuation by absorption Q value at last, the final uniform near-surface model that generates based on polynary parameter.In this step, adopt the minimum tension gridding method for the diffusing point data gridding method in flat seam position, this method precision is higher, and smoothness is good; Handle as profile data for data such as dam, irrigation canals and ditches, adopt the gridding of trend surface gridding method.In this step,, adopt the binary tree method,, utilize the top layer modeling technique again for each piece based on block modeling for the screen work model generating method.This method has promptly solved the inexactness of horizontal layer uniform dielectric modeling method in the past; Solved pure piece modeling again coarse shortcoming has been described on the border; Utilize the binary tree idea about modeling can improve modeling speed in addition; And interactivity is good, finds that mistake is convenient to timely retrieval, correction behind the model if build out, and this is that in the past modeling method is beyond one's reach.In this step, curved surface is edited, eliminated singular point, level and smooth aspect according to the relative position relation of attribute data and mutual restriction relation.
Step 4, on this uniform near-surface model, carry out application such as point-by-point excitation well depth design and static correction value calculating.The boundary scope that calculating optimum excites lithology, water table, speed layering interfaces excites the position as the best of excitation well depth.The best excitation well position that explanation obtains is handled as a layer bit data, it is loose according to the field construction designing requirement reveal, this diffusing point data is the excitation well depth of open-air each shot point, and these data are exported with form.In this step; Best excitation well position can obtain according to following step: B1, utilize little refraction and micro logging information, joint interpretation goes out low velocity layer speed individual-layer data, the point data gridding of should loosing; According to the field construction requirement; For example the design of the interval of 25*25 rice excites well location, then the above-mentioned gridded data that obtains is loose according to the distance of 25*25 rice and reveals, and obtains the point data table 1 that looses; B2, utilize that lithology is cored, joint interpretation achievement that static sounding, the layering of micro logging lithology are demarcated; Adopt the gridding of minimum tension gridding method; Again this gridded data is formatted according to the shotpoint interval Information Network, obtain diffusing point data table 2 by lithology data control; If other attribute datas such as B3, water table information and attenuation by absorption Q value exist, also carry out gridding successively, loose and reveal, obtain diffusing point data table 3 by other attribute constraints; B4, three diffusing point data that B1, B2, B3 step are obtained, joint interpretation, its explanation results excites the well location point data of loosing as the best.Wherein interpretation procedure is confirmed by method design and testing data processing explanation personnel.B5, the reference mark in the diffusing point data of the above-mentioned best excitation well position that obtains place data are taken out; With this data gridding; Obtain best excitation well depth curved surface; At last this excitation well depth curved surface is formatted according to the shot point spacer web that requires in the field construction, these data are open-air excitation well depth data; B6, the above-mentioned open-air excitation well depth data that obtain are derived from database, the data-interface program that here adopts is write output format according to field construction well-digging personnel's requirement, with the form output of form.
Step 5, the excitation well depth that the generates point data of loosing is reloaded into system, generate CGM form isogram, with little delta pattern labeling position; And show the depth value at this some place; Achievement map after the processing utilizes plotting apparatus to draw, and takes field condition and instructs the excitation well depth design.In this step, the CGM form isogram of generation utilizes a cover CGM PaintShop to edit; Add the excitation well depth numerical value of title, remarks, excitation well station location marker, each shot point, after finishing dealing with, regenerate the output of CGM map; Utilize third party software to draw; This achievement map can check that convenient change is seen and and guided the excitation well depth design in the open air at the scene at any time in constructing.
Visible by the above embodiments, the present invention is this on comprehensive consistent near-surface model, pointwise design excitation well depth method; Utilized the joint interpretation information of multiple property parameters; Can set up a meticulous near-surface model, and can on this model, pointwise design excitation well depth, obtain very accurate excitation well depth data based on the unanimity of multiattribute constraint; Optimize the excitation well depth design, thereby reached the purpose that improves the single shot record signal to noise ratio (S/N ratio), improves data quality.
Embodiment two
According to the method that embodiment one provides, present embodiment has provided an instantiation that the point-by-point excitation well depth of setting up in area, triumph Mandalay, exploratory area based on polynary parameter uniform near-surface model is designed.Be illustrated in figure 2 as the meticulous near-surface model synoptic diagram based on little refraction, micro logging, speed, lithology constraint of foundation.Wherein scheming a is the lithohorizon model that utilizes the lithologic interpretation data to set up; Figure b is the lithology data phantom type that utilizes the lithologic interpretation data to set up, and the figure c unified model that to be lithology data set up with joint interpretation result for micro logging, little refraction data, figure d are the comparison diagram of lithology data and micro logging, little refraction data; From Fig. 2, can see; Utilize the near-surface model of joint interpretation result's foundation of lithology data and micro logging data,, then can clearerly see interfacial position accurately if do model slice; Can extract each coordinate position and attribute information at diffusing by mouse, for open-air constructors provides technical support.Fig. 3 is on meticulous near-surface model, and design of point-by-point excitation well location and excitation well depth calculate synoptic diagram, and wherein scheming e is the field trial position of little refraction and micro logging; This point is as the reference mark; Figure f is that the best that joint interpretation obtains excites the well location curved surface, and figure g is for exciting the well location landscape position, and figure h excites the well location curved surface process of revealing of loosing according to 25*25 rice to the best; From Fig. 3, can see the method that adopts the embodiment of the invention one to provide; Can realize the design of point-by-point excitation well depth, for improving the single shot record signal to noise ratio (S/N ratio), the quality of improving data provides best shooting conditions.

Claims (2)

1. point-by-point excitation well depth designing method based on uniform near-surface model is characterized in that this method may further comprise the steps:
A, to lithology core, static sounding and micro logging lithology demarcate the test figure that three kinds of methods obtain and carry out joint interpretation, obtains best lithology layering interfaces;
B, demarcation obtains to the micro logging lithology test figure and little refraction test figure are carried out joint interpretation, obtain the optimum velocity individual-layer data;
C, with the speed individual-layer data that obtains, lithology layering interfaces data and speed, attenuation by absorption Q value, water table position data, well data qualification editor; Speed individual-layer data, lithology layering interfaces data, water table position data conversion stratification bit data form are loaded; Load for the self-defining data layout of well The data; The well data of an attribute compile to(for) speed and attenuation by absorption Q Value Data loads;
D, the lithology layering interfaces data, speed individual-layer data and the water table position data that obtain after the joint interpretation are carried out gridding as diffusing point data, the generating mesh data;
E, utilize the binary tree method, generate the screen work model based on block modeling;
F, aspect is edited, eliminate singular point, level and smooth aspect according to the relative position relation of lithology layering interfaces data, speed individual-layer data and water table position data and mutual restriction relation;
G, load well data, speed data, attenuation by absorption Q value then, the final uniform near-surface model that generates based on polynary parameter;
The boundary scope that H, calculating optimum excite lithology, water table, speed layering interfaces excites the position as the best of excitation well depth;
I, the best that will calculate excite the position to regard a layer bit data and handle, and it is loose according to the field construction designing requirement reveal, and this diffusing point data is the excitation well depth of open-air each shot point;
J, write the data-interface program, the excitation well depth numerical value of each shot point is exported with form;
K, the excitation well depth that the generates point data of loosing is reloaded into system, generate CGM form isogram, utilize plotting apparatus to draw.
2. method according to claim 1 is characterized in that the CGM form isogram to generating, and adopts the CGM PaintShop to handle; With little delta pattern labeling position; And showing the depth value at this some place, the achievement map after the processing utilizes third party software to draw at plotting apparatus.
CN201010011424XA 2010-01-06 2010-01-06 Point-by-point excitation well depth designing method based on uniform near-surface model Expired - Fee Related CN101788686B (en)

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CN102819041B (en) * 2012-08-28 2014-12-10 中国石油化工股份有限公司 Method for determining seismic explosive excitation depth by using soil layer resistance information
CN103969682B (en) * 2013-01-28 2016-08-17 中国石油集团东方地球物理勘探有限责任公司 A kind of brill well-log information Matching Method of Depth and system
CN104375187B (en) * 2013-08-15 2017-05-03 中国石油天然气集团公司 Method for designing cannon well depths based on microlog and non-seismic data
CN104297797A (en) * 2014-10-14 2015-01-21 中石化石油工程地球物理有限公司胜利分公司 Refraction micro-metering well investigation method for ultra-thick loess highland
CN106569282B (en) * 2016-10-17 2019-03-12 中国石油化工股份有限公司 A kind of earthquake-capturing excitation well depth designing method
CN109884710B (en) * 2019-03-20 2021-02-26 中国石油化工股份有限公司 Micro-logging tomography method aiming at excitation well depth design
CN112526610B (en) * 2019-09-17 2023-03-21 中国石油化工股份有限公司 Three-dimensional seismic acquisition excitation well depth design method for constrained surface layer modeling

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