CN107102354B - A kind of shale dessert seismic Integrated Evaluation method - Google Patents
A kind of shale dessert seismic Integrated Evaluation method Download PDFInfo
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- CN107102354B CN107102354B CN201611193684.7A CN201611193684A CN107102354B CN 107102354 B CN107102354 B CN 107102354B CN 201611193684 A CN201611193684 A CN 201611193684A CN 107102354 B CN107102354 B CN 107102354B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. analysis, for interpretation, for correction
- G01V1/30—Analysis
- G01V1/306—Analysis for determining physical properties of the subsurface, e.g. impedance, porosity or attenuation profiles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/61—Analysis by combining or comparing a seismic data set with other data
- G01V2210/612—Previously recorded data, e.g. time-lapse or 4D
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/62—Physical property of subsurface
- G01V2210/624—Reservoir parameters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/62—Physical property of subsurface
- G01V2210/624—Reservoir parameters
- G01V2210/6244—Porosity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V2210/00—Details of seismic processing or analysis
- G01V2210/60—Analysis
- G01V2210/62—Physical property of subsurface
- G01V2210/624—Reservoir parameters
- G01V2210/6248—Pore pressure
Abstract
The invention discloses a kind of shale " dessert " seismic Integrated Evaluation methods, method includes the following steps: 1) required according to the geologic assessment of shale gas field development, utilize the development conditions such as gas-bearing property, compressibility, porosity, strata pressure and the crack of three dimensional depth migration before stack seismic data and prestack road set information prediction shale gas-bearing formation, crustal stress, structural map, buried depth figure and the preservation condition for analyzing shale gas-bearing formation are made, work area shale gas quality major parameter prognostic chart is obtained；2) based on the analysis to shale gas-bearing formation exploitation " geology dessert " and " engineering dessert ", main geophysical parameters preferably relevant to exploitation, and one-parameter threshold value is determined；3) different weights is assigned according to contribution of each parameter in shale gas exploitation, establishes shale " dessert " seismic Integrated Evaluation parameter list；4) one-parameter is weighted, obtains shale gas comprehensive evaluation value P, synthetical assortment evaluation is carried out to shale gas block according to P value.Evaluation result of the present invention can be used for carrying out classification of assessment to shale gas-bearing formation, instruct the exploitation of shale gas-bearing formation.
Description
Technical field
The present invention relates to geophysical techniques more particularly to a kind of shale " dessert " seismic Integrated Evaluation methods.
Background technique
Shale gas refers to the general designation of the biochemical genesis air and heat origin cause of formation gas continuously generated.Mainly with the shape that adsorbs or dissociate
State preservation has the characteristics that self-generation, self-reservoir, large area are continuously enriched in dark-coloured rich organic matter mud shale.It is real by exploitations in 3 years
Trample, gradually recognize burnt masonry dam area shale gas " dessert " refer mainly to " have certain tectonic setting, buried depth is moderate, thickness is larger,
Physical property is good, and maturity is moderate, and organic carbon content is high, and preservation condition is preferable, and gas-bearing property is good, and brittle mineral content is high, microcrack phase
To the rammell of development.
China PetroChemical Corporation issues " shale exploration activity selection and appraisal of exploration area method " trial version, preferably shale within 2013
Oily hydrocarbon genesis conditions, occurrence condition can adopt condition, resource extent etc. and carry out assignment evaluation, both not be suitable for shale gas exploitation,
It is not suitable for " dessert " seismic Integrated Evaluation yet.Need major parameter preferably relevant to geophysics and research evaluation side
Method evaluates shale gas-bearing formation with geophysical techniques and means, instructs well site deployment and well Trajectory Design, meets shale gas
The requirement of field Efficient Development.Therefore shale gas exploitation " dessert " seismic Integrated Evaluation technology is established to be necessary.
Summary of the invention
The technical problem to be solved in the present invention is that for the defects in the prior art, providing a kind of shale " dessert " earthquake
Integrated evaluating method instructs the exploitation of shale gas-bearing formation for carrying out classification of assessment to shale gas-bearing formation.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of shale " dessert " seismic Integrated Evaluation method, comprising the following steps:
1) it in known oil gas field work area, is constructed using three dimensional depth migration before stack seismic data and prestack trace gather data make
Figure, buried depth figure, seismic data quality figure；And it is anti-using the above three dimensional seismic data and prestack road set information progress poststack and prestack
It drills, the prediction of FRACTURE PREDICTION, crustal stress, prediction of formation pressure, obtains the prediction of oil gas field work area shale gas quality main relevant parameters
Figure, the main relevant parameters prognostic chart includes shale TOC prognostic chart, porosity prediction figure, brittle mineral content prediction figure, thickness
Spend prognostic chart, air content prognostic chart, fracture development figure, stress prediction figure, pressure prediction figure；
2) based on the concept to shale " dessert ", in conjunction with earthquake prediction in step 1) as a result, it is preferred that shale geophysics phase
Parameter is closed, screening criteria is to choose predict shale gas, generate, preserving, saving and the engineered parameter having a major impact, and is led
To include following parameter:
Seismic data parameter: pre-stack time migration seismic data quality, the parameter have an impact to prediction result；
Hydrocarbon source conditional parameter: including shale thickness and total content of organic carbon, which influences the production quantity of shale gas；
Reservior Conditions parameter: for indicating the porosity of shale gas-bearing formation physical property, which influences preserving for shale gas；
Preservation condition parameter: including tectonic setting, attitude of stratum and fault development degree, air content, which influences page
The preservation of rock gas；
Engineered conditional parameter: including buried depth, pore pressure coefficient, microcrack development degree, crustal stress and shale
The brittleness of layer, the parameter influence the engineered process of shale gas；
3) different weights is assigned to it according to contribution of each shale geophysics relevant parameter in shale gas exploitation, build
Vertical shale " dessert " seismic Integrated Evaluation parameter list；
It is specific as follows to establish shale " dessert " seismic Integrated Evaluation parameter list: the seismic data quality made in step 1
It is directed to contribution of the different parameters for shale gas on the basis of block plan, gives different assignment sections, with establishing shale " dessert "
Assessment parameter table is shaken,
4) shale gas synthesis is calculated using integrated evaluating method according to shale " dessert " seismic Integrated Evaluation parameter list to comment
It is worth P, classification of assessment is carried out to shale gas-bearing formation according to P value, instructs the exploitation of shale gas-bearing formation.
According to the above scheme, the weight of shale geophysics relevant parameter is allocated as follows in the step 2):
The weight of Primary parameter is assigned as, and seismic data parameter is 0.1；Hydrocarbon source conditional parameter is 0.2；Reservior Conditions parameter
It is 0.2；Preservation condition parameter is 0.3；Engineered conditional parameter is 0.4；
The weight of secondary parameters is assigned as, and pre-stack time migration seismic data quality is 1；Shale thickness is 0.4, total organic
Carbon content is 0.6；Porosity is 1；Tectonic setting is 0.2, attitude of stratum 0.2, fault development degree are 0.3, air content is
0.3；Buried depth is 0.2, pore pressure coefficient 0.1, microcrack development degree are 0.2, crustal stress 0.3, rammell brittleness
It is 0.2.
The beneficial effect comprise that: the present invention provides a kind of effective and feasible earthquake synthesis for shale " dessert "
Evaluation method, from seismic data quality, hydrocarbon source condition, Reservior Conditions, engineered condition various aspects provide can be with quantification
Call by value parameter carry out overall merit.According to evaluation result on the one hand shale gas field can be classified, preferred development unit and
Carry out well site deployment；On the other hand well Trajectory Design can be instructed, achievees the purpose that Efficient Development shale gas field.
Single factor test proposed by the present invention is more comprehensive, and integrated evaluating method is reasonable, and shale " dessert " synthesis finally obtained is commented
Valence result and the identical rate of practical shale gas exploitation capacity data are higher, effectively direct the exploration and development of Fuling shale gas.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is block of embodiment of the present invention single factor evaluation parameter assignment table；
Fig. 2 is block of embodiment of the present invention assessment parameter table；
Fig. 3 is final effect of embodiment of the present invention figure.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, is not used to limit
The fixed present invention.
A kind of shale " dessert " seismic Integrated Evaluation method, comprising the following steps:
1) it in known oil gas field work area, is constructed using three dimensional depth migration before stack seismic data and prestack trace gather data make
Figure, buried depth figure, seismic data quality figure；And it is anti-using the above three dimensional seismic data and prestack road set information progress poststack and prestack
It drills, the prediction of FRACTURE PREDICTION, crustal stress, prediction of formation pressure, obtains the prediction of oil gas field work area shale gas quality main relevant parameters
Figure, the main relevant parameters prognostic chart includes shale TOC prognostic chart, porosity prediction figure, brittle mineral content prediction figure, thickness
Spend prognostic chart, air content prognostic chart, fracture development figure, stress prediction figure, pressure prediction figure；
2) based on the concept to shale " dessert ", in conjunction with earthquake prediction in step 1 as a result, it is preferred that shale geophysics is related
Parameter, screening criteria are to choose predict shale gas, generate, preserving, saving and the engineered parameter having a major impact, mainly
Including following parameter:
Seismic data parameter: pre-stack time migration seismic data quality has an impact to prediction result；
Hydrocarbon source conditional parameter: including shale thickness and total content of organic carbon, the production quantity of shale gas is influenced；
Reservior Conditions parameter: for indicating the porosity of shale gas-bearing formation physical property, preserving for shale gas is influenced；
Preservation condition parameter: including tectonic setting, attitude of stratum and fault development degree, air content, shale gas is influenced
It saves
Engineered conditional parameter: including buried depth, pore pressure coefficient, microcrack development degree, crustal stress and shale
The brittleness of layer, influences the engineered process of shale gas；
3) different weights is assigned according to contribution of each parameter in shale gas exploitation, establishes shale " dessert " earthquake
Assessment parameter table, and integrated evaluating method is established by research.Specific evaluation method is the earthquake money made in step 1
It is directed to contribution of the different parameters for shale gas on the basis of item matter figure, gives different assignment sections, is specifically shown in Table 1；By not
Single factor test in same evaluation parameter type carries out scoring assignment, cumulative to obtain a certain type parameter according to different weights
Score value, then after the scoring of different type parameter is multiplied with weight coefficient, is added up and finally scored.
1 shale gas evaluation parameter assignment table of table
4) shale gas comprehensive evaluation value P is calculated using integrated evaluating method, shale gas block is integrated according to P value
Evaluation of classification.
Shale gas dessert prediction overall merit be according to seismic data quality, hydrocarbon source condition, Reservior Conditions, preservation condition,
Engineered condition is calculated, and specific formula for calculation is as follows:
P=PData quality+PHydrocarbon source condition+PReservior Conditions+PPreservation condition+PEngineered condition (1)
PHydrocarbon source condition=0.2 (0.4 × PShale thickness+0.6×PTotal content of organic carbon) (2)
PReservior Conditions=0.2 × PPorosity (3)
PPreservation condition=0.3 (0.2 × PTectonic setting+0.2×PStratigraphic dip+0.3×PIt is broken wealth+0.3×PAir content) (4)
PEngineered condition=0.2 (0.2 × PBuried depth+0.1×PPore pressure coefficient+0.2×PMicrocrack wealth+0.3×PCrustal stress coefficient of variation+0.2×
PBuried depth) (5)
In formula:
P is shale gas comprehensive evaluation value, PAir content、PShale thickness、POrganic carbon content、PPorosity、PTectonic setting、PFault development degree、PBuried depth、PPore pressure coefficient、
PCrustal stress、PMicrocrack development degreeAnd PBrittlenessEtc. assignment can be carried out according to shale gas key parameter data and its score value and weight, and participate in counting
It calculates.
According in table 1, scoring assignment, root are carried out by the single factor test in different evaluation parameter types to shale oil gas block
It is cumulative to obtain the score value of a certain type parameter according to different weights, then after the scoring of different type parameter is multiplied with weight coefficient,
P value, which is calculated, using step 4) calculation formula sees Fig. 1.
Comprehensive value model is shown in Fig. 2, and shale HYDROCARBON-BEARING REGION shale " dessert " earthquake is finally produced according to comprehensive value model
Map of Complex evaluation is shown in Fig. 3.
It should be understood that for those of ordinary skills, it can be modified or changed according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (2)
1. a kind of shale dessert seismic Integrated Evaluation method, which comprises the following steps:
1) in known oil gas field work area, using three dimensional depth migration before stack seismic data and prestack trace gather data make structural map,
Buried depth figure, seismic data quality figure；And using the above three dimensional seismic data and prestack road set information carry out poststack and prestack inversion,
FRACTURE PREDICTION, crustal stress prediction, prediction of formation pressure, obtain oil gas field work area shale gas quality main relevant parameters prognostic chart,
The main relevant parameters prognostic chart includes shale TOC prognostic chart, porosity prediction figure, brittle mineral content prediction figure, thickness
Prognostic chart, air content prognostic chart, fracture development figure, stress prediction figure, pressure prediction figure；
2) based on the concept to shale " dessert ", in conjunction with earthquake prediction in step 1) as a result, it is preferred that shale geophysics correlation is joined
Number, screening criteria are to choose predict shale gas, generate, preserving, saving and the engineered parameter having a major impact, main packet
Include following parameter:
Seismic data parameter: pre-stack time migration seismic data quality, the parameter have an impact to prediction result；
Hydrocarbon source conditional parameter: including shale thickness and total content of organic carbon, which influences the production quantity of shale gas；
Reservior Conditions parameter: for indicating the porosity of shale gas-bearing formation physical property, which influences preserving for shale gas；
Preservation condition parameter: including tectonic setting, attitude of stratum and fault development degree, air content, which influences shale gas
Preservation；
Engineered conditional parameter: including buried depth, pore pressure coefficient, microcrack development degree, crustal stress and shale gas-bearing formation
Brittleness, the parameter influence shale gas engineered process；
3) different weights is assigned to it according to contribution of each shale geophysics relevant parameter in shale gas exploitation, establish page
Rock " dessert " seismic Integrated Evaluation parameter list；
It is specific as follows to establish shale " dessert " seismic Integrated Evaluation parameter list: the seismic data quality figure made in step 1)
On the basis of be directed to contribution of the different parameters for shale gas, give different assignment sections, establish shale " dessert " earthquake synthesis comment
Valence parameter list；
4) shale gas comprehensive evaluation value is calculated using integrated evaluating method according to shale " dessert " seismic Integrated Evaluation parameter list
P carries out classification of assessment to shale gas-bearing formation according to P value, instructs the exploitation of shale gas-bearing formation.
2. seismic Integrated Evaluation method according to claim 1, which is characterized in that shale geophysics in the step 2)
The weight of relevant parameter is allocated as follows:
The weight of Primary parameter is assigned as, and seismic data parameter is 0.1；Hydrocarbon source conditional parameter is 0.2；Reservior Conditions parameter is
0.2；Preservation condition parameter is 0.3；Engineered conditional parameter is 0.4；
The weight of secondary parameters is assigned as, and pre-stack time migration seismic data quality is 1；Shale thickness is that 0.4, total organic carbon contains
Amount is 0.6；Porosity is 1；Tectonic setting is 0.2, attitude of stratum 0.2, fault development degree are 0.3, air content 0.3；
Buried depth is 0.2, pore pressure coefficient 0.1, microcrack development degree are 0.2, the brittleness of crustal stress 0.3, shale gas-bearing formation is
0.2。
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