CN106326516B - Row's hydrocarbon function of hydrocarbon source rock and the construction method for arranging hydrocarbon index function - Google Patents
Row's hydrocarbon function of hydrocarbon source rock and the construction method for arranging hydrocarbon index function Download PDFInfo
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Abstract
The present invention provides the construction methods of a kind of row's hydrocarbon function of hydrocarbon source rock and row's hydrocarbon index function.The construction method includes: to establish organic carbon hydrocarbon function according to geochemistry experimental data；The computation model for establishing organic carbon weight percent calculates the weight percent of the organic carbon in the hydrocarbon source rock of the Unit Weight of different depth；According to the computation model of the weight percent of organic carbon and organic carbon hydrocarbon function, the weight of the hydrocarbon primary rock producing hydrocarbon of the Unit Weight of different depth is calculated；The weight percent computation model for establishing chloroform bitumen " A " calculates the weight percent of the chloroform bitumen " A " in the Unit Weight hydrocarbon source rock of different depth；And the weight percent according to chloroform bitumen " A " in the weight of hydrocarbon and the unit hydrocarbon source rock of different depth of the hydrocarbon source rock of different depth, building row's hydrocarbon function and row's hydrocarbon index function.The construction method solves the problems, such as that hydrocarbon source rock row's hydrocarbon ability cannot be evaluated in the prior art.
Description
Technical field
The present invention relates to petroleum and geologic prospect technical field, in particular to a kind of hydrocarbon source rock row's hydrocarbon function with
Arrange the construction method of hydrocarbon index function.
Background technique
In conventional gas and oil exploration, hydrocarbon source rock Hydrocarbon yield is one of important research content of exploration target area, the research
It resource potential to objective understanding exploration target area and instructs next step exploration deployment all there is important practical significance.
With the rise of unconventional oil and gas exploration and development, hydrocarbon source rock characteristic is as in three basic researches of unconventional resource
One of hold, great attention both domestic and external is caused, an important research content in hydrocarbon source rock characteristic is exactly hydrocarbon source rock
Arrange hydrocarbon ability.
The evaluation that hydrocarbon source rock arranges hydrocarbon ability is usually to utilize geochemical method, and reflection hydrocarbon source rock arranges the organic of hydrocarbon ability
The predominantly free multiple parameters such as hydrocarbon content " S1 " and chloroform bitumen " A " of Geochemistry Parameters, since existing Logging Evaluation Method is to trip
Sensibility from the hydrocarbon source rocks geochemical index such as hydrocarbon content " S1 " and chloroform bitumen " A " is poor, so, logging evaluation side is applied at present
Method can only analyze the parameters such as total content of organic carbon " TOC " and pyrolysis hydrocarbon content " S2 ".
Therefore, the construction method of a kind of row's hydrocarbon function and row's hydrocarbon index function is needed.
Summary of the invention
The main purpose of the present invention is to provide a kind of hydrocarbon source rock row hydrocarbon function and arrange hydrocarbon index function construction method,
To solve the problems, such as accurately evaluate row's hydrocarbon ability of hydrocarbon source rock in the prior art.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of row's hydrocarbon function of hydrocarbon source rock and row
The construction method of hydrocarbon index function, above-mentioned construction method include: to establish organic carbon hydrocarbon letter according to geochemistry experimental data
Number；The computation model for establishing organic carbon weight percent calculates the organic carbon in the hydrocarbon source rock of the Unit Weight of different depth
Weight percent；According to the computation model of the weight percent of above-mentioned organic carbon and above-mentioned organic carbon hydrocarbon function, calculate different
The weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of the Unit Weight of depth；The weight percent computation model of chloroform bitumen " A " is established, is calculated
The weight percent of above-mentioned chloroform bitumen " A " in the Unit Weight hydrocarbon source rock of above-mentioned different depth；And according to above-mentioned difference
The weight percent of above-mentioned chloroform bitumen " A " in the unit hydrocarbon source rock of the weight of the hydrocarbon of the hydrocarbon source rock of depth and above-mentioned different depth
Than building row's hydrocarbon function and row's hydrocarbon index function.
Further, above-mentioned organic carbon hydrocarbon function is Ehgq=g (TOC), in formula, TOC indicates the hydrocarbon source rock of Unit Weight
In organic carbon weight percent, EhgqIndicate the weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of Unit Weight.
Further, the above-mentioned computation model for establishing organic carbon weight percent, calculates the Unit Weight of different depth
The step of weight percent of organic carbon in hydrocarbon source rock includes: step A, above-mentioned different deep using resistivity scanning log measurement
The resistivity of the hydrocarbon source rock of degree, is fitted to resistivity curve；Step B establishes above-mentioned organic carbon weight according to above-mentioned resistivity curve
Measure the computation model of percentage；And step C calculates above-mentioned difference according to the computation model of above-mentioned organic carbon weight percent
The weight percent of organic carbon in the hydrocarbon source rock of the Unit Weight of depth.
Further, in above-mentioned steps A, above-mentioned resistivity scanning well logging is microresistivity scanning well logging.
Further, the computation model of above-mentioned organic carbon weight percent is TOC=f1(Rt, DEN, DT), in formula, TOC
Indicate the weight percent of the organic carbon in the above-mentioned hydrocarbon source rock of Unit Weight, RtIndicate the resistivity of above-mentioned hydrocarbon source rock；DEN table
Show the density of above-mentioned hydrocarbon source rock；DT indicates the interval transit time of corresponding depth.
Further, the above-mentioned computation model for establishing chloroform bitumen " A " weight percent, calculates the list of above-mentioned different depth
The step of weight percent of above-mentioned chloroform bitumen " A " in the above-mentioned hydrocarbon source rock of position weight includes: step a, total according to nuclear-magnetism
Vibration log data, calculates the saturation degree of above-mentioned hydrocarbon source rock；Step b establishes above-mentioned chloroform drip according to the saturation degree of above-mentioned hydrocarbon source rock
The computation model of green " A " weight content；And step c, calculate the above-mentioned chloroform drip in the unit hydrocarbon source rock of above-mentioned different depth
The weight percent of green " A ".
Further, the calculation formula of the saturation degree of above-mentioned hydrocarbon source rock isIn formula,
So is crude oil saturation degree, indicates the volume of hole shared by above-mentioned crude oil and the percentage of above-mentioned total pore volume；T2iFor nuclear-magnetism
The lateral relaxation time of i-th of component in the pop that resonates；It is opposite for the above-mentioned hole of nuclear magnetic resonance corresponding to above-mentioned T2i component
Percent by volume；AT2 is T2 saturation computation threshold values.
Further, the computation model of above-mentioned chloroform bitumen " A " weight content isIn formula, WA
Indicate the weight percent of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of above-mentioned Unit Weight；SoFor oil saturation；ФTRock
Total porosity；ρoFor the density of crude oil；ρBFor the density of above-mentioned hydrocarbon source rock.
Further, above-mentioned row's hydrocarbon function is Epeq=Ehgq-WA, in formula, EpeqIndicate the above-mentioned hydrocarbon source rock of Unit Weight
The weight for arranging hydrocarbon, characterizes row's hydrocarbon ability of above-mentioned hydrocarbon source rock；EhgqIndicate the weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of Unit Weight, table
Levy the hydrocarbon generation capacity of hydrocarbon source rock；WAIndicate the weight percent of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of above-mentioned Unit Weight.
Further, above-mentioned row's hydrocarbon index function is Ipeq=Ehgq-WA/Ehgq, in formula, IpeqFor row's hydrocarbon of above-mentioned hydrocarbon source rock
Index indicates the weight of row's hydrocarbon of the above-mentioned hydrocarbon source rock of Unit Weight and the weight of hydrocarbon；EhgqIndicate the above-mentioned hydrocarbon of Unit Weight
The weight of the hydrocarbon of source rock characterizes the hydrocarbon generation capacity of hydrocarbon source rock；WAIndicate above-mentioned chloroform drip in the above-mentioned hydrocarbon source rock of Unit Weight
The weight percent of green " A ".
Hydrocarbon source rock row's hydrocarbon function and row's hydrocarbon index function can be obtained, and then can be according to the Hydrocarbon yield and row's hydrocarbon of hydrocarbon source rock
Row's hydrocarbon ability of index assessment hydrocarbon source rock solves the problems, such as that hydrocarbon source rock row's hydrocarbon ability cannot be evaluated in the prior art, to objective
Recognize the resource potential of exploration target area and next step exploration deployment is instructed to have important practical significance.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present invention, and of the invention shows
Examples and descriptions thereof are used to explain the present invention for meaning property, does not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 shows the flow diagram of the construction method for row's hydrocarbon index that a kind of exemplary embodiment of the application provides；
The weight of the hydrocarbon of the white clouds matter mud stone and mud stone that are provided Fig. 2 shows a kind of preferred embodiment of the application with it is organic
The relation curve of carbon content；
Fig. 3 shows the test result that a kind of preferred embodiment of the application provides；And
Fig. 4 shows the test result that a kind of preferred embodiment of the application provides.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
A kind of typical embodiment of the application provides a kind of row's hydrocarbon function of hydrocarbon source rock and the structure for arranging hydrocarbon index function
Construction method, as shown in Figure 1, the construction method includes: to establish organic carbon hydrocarbon function according to geochemistry experimental data, it is organic
Carbon hydrocarbon function is the weight of the hydrocarbon primary rock producing hydrocarbon of the organic carbon weight percent and Unit Weight in the hydrocarbon source rock of unit weight
Functional relation；The computation model for establishing organic carbon weight percent, in the hydrocarbon source rock for calculating the Unit Weight of different depth
The weight percent of organic carbon；According to the computation model of above-mentioned organic carbon weight percent and above-mentioned unit organic carbon hydrocarbon letter
Number, calculates the weight of the hydrocarbon of the above-mentioned hydrocarbon source rock of Unit Weight of different depth；Establish the weight percent meter of chloroform bitumen " A "
Model is calculated, the weight percent of the above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of the Unit Weight of above-mentioned different depth is calculated；And
According to above-mentioned chloroform bitumen in the unit hydrocarbon source rock of the weight of the hydrocarbon of the hydrocarbon source rock of above-mentioned different depth and above-mentioned different depth
The weight percent of " A ", building row's hydrocarbon function and row's hydrocarbon index function.
Using above-mentioned construction method, hydrocarbon source rock row's hydrocarbon function and row's hydrocarbon index function can be obtained, and then can basis
The Hydrocarbon yield of hydrocarbon source rock and row's hydrocarbon ability of row's hydrocarbon index evaluation hydrocarbon source rock, hydrocarbon source rock row cannot be evaluated in the prior art by solving
The problem of hydrocarbon ability, to the resource potential of objective understanding exploration target area and instructs next step exploration deployment to have important reality
Meaning.
Accurate single organic carbon hydrocarbon function in order to obtain, the organic carbon hydrocarbon function of the preferably above-mentioned Unit Weight of the application
For Ehgq=g (TOC), wherein TOC indicates the weight percent of the organic carbon in the hydrocarbon source rock of Unit Weight, unit %, Ehgq
Indicate the weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of Unit Weight, the organic carbon of corresponding different content, corresponding hydrocarbon function is not
It is identical.
In another preferred embodiment of the application, the above-mentioned computation model for establishing organic carbon weight percent is calculated
The step of organic carbon weight percent in the hydrocarbon source rock of the Unit Weight of different depth includes: step A, is scanned using resistivity
The resistivity of the hydrocarbon source rock of the above-mentioned different depth of log measurement, is fitted to resistivity curve；Step B, it is bent according to above-mentioned resistivity
Line establishes the computation model of above-mentioned organic carbon weight percent；And step C, according to the meter of above-mentioned organic carbon weight percent
Model is calculated, the weight percent of the organic carbon in the hydrocarbon source rock of the Unit Weight of above-mentioned different depth is calculated.Pass through above-mentioned step
Suddenly it obtains the weight percent of the organic carbon of different depth, and then can be calculated according to above-mentioned organic carbon hydrocarbon function
The hydrocarbon amount of the organic carbon of different depth.
Since research area stratum is mostly the thin layer of Centimeter Level, conventional resistive rate is logged well, and resolution ratio is low, and dual laterolog is indulged
It is typically larger than 0.4m to resolution ratio, thickness is less than 0.5m, can not usually identify thin layer, directly utilize the deep resistivity of conventional logging
The TOC precision calculated with interval transit time is lower, and in order to improve the computational accuracy of TOC, the preferably above-mentioned resistivity scanning of the application is surveyed
Well is microresistivity scanning well logging, and microresistivity scanning well logging high resolution has preferable recognition reaction to Thin oil sandwich, is greater than
The thin layer of 0.05m can recognize.
In another preferred embodiment of the application, the computation model of above-mentioned organic carbon weight percent is TOC=f1
In (Rt, DEN, DT) formula, TOC indicates the weight percent of the organic carbon in the above-mentioned hydrocarbon source rock of Unit Weight；RtIndicate above-mentioned
The resistivity of hydrocarbon source rock；DEN indicates the density of above-mentioned hydrocarbon source rock；DT indicates the interval transit time of corresponding depth, and influencing TOC further includes
The sensitive log parameter of some other pairs of organic carbon contents, those skilled in the art can organic carbon weights determines according to actual conditions
Measure the practical computation model of percentage.The organic carbon in the hydrocarbon source rock of different depth can be accurately obtained using the computation model
Weight percent, and then can accurately calculate row's hydrocarbon index of hydrocarbon source rock.
In the application another kind preferred embodiment, the preferably above-mentioned calculating for establishing chloroform bitumen " A " weight percent amount
Model calculates the weight percent of the above-mentioned chloroform bitumen " A " in the above-mentioned hydrocarbon source rock of the Unit Weight of above-mentioned different depth
Step includes: step a, according to nuclear magnetic resonance log data, calculates the saturation degree of above-mentioned hydrocarbon source rock；Step b, according to above-mentioned hydrocarbon source
The saturation degree of rock establishes the computation model of above-mentioned chloroform bitumen " A " weight content；And step c, calculate above-mentioned different depth
The weight percent of above-mentioned chloroform bitumen " A " in unit hydrocarbon source rock.It can establish chloroform bitumen " A " weight using this method to contain
The computation model of amount, and then the weight percent of chloroform bitumen " A " can be calculated according to the computation model, and then according to obtaining
The weight percent of chloroform bitumen " A " overcomes come the building of the row's of progress hydrocarbon index and cannot get accurate chloroform in the prior art
The problem of weight percent of pitch " A ", provides most sound assurance to arrange the building of hydrocarbon index.
In order to by it is quick accurately in a manner of obtain Unit Weight hydrocarbon source rock in above-mentioned chloroform bitumen " A " weight percent
Than the calculation formula of the saturation degree of the preferably above-mentioned hydrocarbon source rock of the application isIn formula, So is
Crude oil saturation degree indicates the volume of hole shared by above-mentioned crude oil and the percentage of above-mentioned total pore volume；T2iFor nuclear magnetic resonance
The lateral relaxation time of i-th of component in pop；For the above-mentioned hole relative volume of nuclear magnetic resonance corresponding to above-mentioned T2i component
Percentage；AT2 is T2 saturation computation threshold values.
In another preferred embodiment of the application, the computation model of above-mentioned chloroform bitumen " A " weight content isIn formula, WAIndicate the weight percent of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of above-mentioned Unit Weight；So
For oil saturation；ФTThe total porosity of rock；ρoFor the density of crude oil；ρBFor the density of above-mentioned hydrocarbon source rock.Using the chloroform
The computation model of pitch " A " weight content, which can more precisely compute, obtains chloroform bitumen " A " weight content, and then obtains accurately
Row's hydrocarbon index.
In a kind of preferred embodiment of the application, row's hydrocarbon function of building is Epeq=Ehgq-WA, in formula, EpeqIndicate single
The weight of row's hydrocarbon of the above-mentioned hydrocarbon source rock of position weight, characterizes row's hydrocarbon ability of above-mentioned hydrocarbon source rock；EhgqIndicate the above-mentioned of Unit Weight
The weight of hydrocarbon primary rock producing hydrocarbon characterizes the hydrocarbon generation capacity of hydrocarbon source rock；WAIndicate above-mentioned chloroform drip in the hydrocarbon source rock of above-mentioned Unit Weight
The weight percent of green " A ".
In another preferred embodiment of the application, preferably above-mentioned row's hydrocarbon index function is Ipeq=Ehgq-WA/Ehgq, formula
In, IpeqFor row's hydrocarbon index of above-mentioned hydrocarbon source rock, the weight of row's hydrocarbon of the above-mentioned hydrocarbon source rock of Unit Weight and the weight of hydrocarbon are indicated
Amount；EhgqThe weight for indicating the hydrocarbon of the above-mentioned hydrocarbon source rock of Unit Weight, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；WAIndicate unit weight
The weight percent of above-mentioned chloroform bitumen " A " in the above-mentioned hydrocarbon source rock of amount.
In order to enable those skilled in the art clearly to understand this programme, below with the Junggar Basin Permian System
For row's hydrocarbon function of the hydrocarbon source rock of a densification oilfield and the construction method of row's hydrocarbon index function, to the technical solution of the application
It is described in detail.
The oily reservoir of the densification in the region is the fine-grained sediment of salified lacustrine environment, and the principal lithologic of hydrocarbon source rock is mud stone, can
To be divided into purer mud stone, grey matter mud stone, cloud matter mud stone, silty etc., the mud stone of these different characteristics is all containing organic
Matter, but due to the difference of depositional environment, material resource distance, Source Organic Matter and water depth etc., there are one for row's hydrocarbon ability
Determine difference.
The detailed process of the construction method of the bat hydrocarbon index of hydrocarbon source rock is divided into following steps:
The first, applied geochemistry experimental data establishes organic carbon hydrocarbon function
Organic carbon hydrocarbon function is the organic carbon weight percent and unit weight in the hydrocarbon source rock of unit weight in the application
The functional relation of the weight of the hydrocarbon primary rock producing hydrocarbon of amount.Specially Ehgq=g (TOC), in formula, EhgqIndicate the above-mentioned hydrocarbon of Unit Weight
The weight of source rock hydrocarbon, the weight percent of the hydrocarbon source rock organic carbon of TOC Unit Weight.
In identical hydrocarbon source rock, there is positive correlation between organic carbon weight percent and the weight of hydrocarbon, that is, have
Machine carbon weight percentage increases, and the weight of hydrocarbon also increases, but in the case of different organic carbon weight percent, Unit Weight
The weight of organic carbon hydrocarbon may have difference, i.e. the hydrocarbon conversion ratio of the organic carbon of Unit Weight may have difference.Fig. 2
In gone out white clouds matter mud stone and mud stone Unit Weight organic carbon hydrocarbon weight with organic carbon weight percent in the reality
Apply the change curve in region.
Also, in the region, for white clouds matter mud stone, the hydrocarbon function of organic carbon are as follows:
The second, the computation model for establishing organic carbon weight percent, in the hydrocarbon source rock for calculating the Unit Weight of different depth
Organic carbon weight percent
Firstly, the resistivity of the hydrocarbon source rock using the microresistivity scanning above-mentioned different depth of log measurement, is fitted to resistance
Rate curve.
Since the stratum of survey region is mostly the thin layer of Centimeter Level, conventional resistive rate well logging resolution ratio is low, dual laterolog
Longitudinal resolution be typically larger than 0.4m, thickness, which is less than 0.5m thin layer, can not usually identify, directly utilize the deep electric of conventional logging
Resistance rate and the TOC precision that interval transit time calculates are lower；And micro-resisitivity image high resolution, have to thin reservoir
Preferable recognition reaction, the thin layer greater than 0.05m can recognize.The technical problem for efficiently solving thin layer identification and evaluation, obtains
The precision of organic carbon weight percent values out greatly improves.The characteristics of using micro-resisitivity image high resolution,
Using dimension-reduction treatment and it is segmented logarithmic linear scale method, has synthesized high resolution resistivity curve.
The corresponding functional relation of the curve isIn formula, R synthesis
High definition electric resistivity curve, unit Ω .m, RBaselineResistivity average value at nonhydrocarbon hydrocarbon source rock section overlapping, unit Ω .m, DT are pair
Answer the interval transit time of depth, unit μ s/ft, DTBaselineAverage interval transit time at nonhydrocarbon hydrocarbon source rock section overlapping, unit μ s/ft.
Secondly, establishing the computation model of above-mentioned organic carbon weight percent according to above-mentioned resistivity curve.
Rule of thumb, the computation model for obtaining organic carbon weight percent is TOC=(Δ lgR) × 102.297-0.1688×LOM,
In formula, weight percent of the TOC for the organic carbon in the hydrocarbon source rock of unit weight, the maturity calibration factor of LOM organic matter,
LOM=0.0989 × VR5-2.1587×VR4+12.392×VR3-29.032×VR2+ 32.53 × VR-3.0338, wherein VR
For reflectance of vitrinite, no guiding principle amount, in this example, RBaselineFor 5 Ω .m, DTBaselineFor 90 μ s/ft, VR 0.9.
Finally, calculating the Unit Weight of different depth according to the computation model of the above-mentioned organic carbon weight percent obtained
Hydrocarbon source rock organic carbon weight percent.The 5th region 50 of Fig. 3 show organic carbon weight percent calculated result with
It is good to show that the organic carbon weight percent being calculated using computation model and experimental result are had for partial experimental result
Consistency.
Third, calculate different depth Unit Weight above-mentioned hydrocarbon primary rock producing hydrocarbon weight according to the organic carbon being calculated
Weight percent and Ehgq=g (TOC) calculates the weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of the Unit Weight of different depth, i.e. unit
The primary rock producing hydrocarbon of weight at crude oil weight.
4th, the weight percent computation model for establishing chloroform bitumen " A " calculates the Unit Weight hydrocarbon of above-mentioned different depth
The weight percent of above-mentioned chloroform bitumen " A " in source rock
Firstly, calculating the saturation degree of above-mentioned hydrocarbon source rock according to nuclear magnetic resonance log data.
Since the wetability of example region hydrocarbon source rock changes greatly, oil saturation others method error calculated compared with
Greatly, so indicating the oil saturation of hydrocarbon source rock in this example using NMR logging data, specific formula is for exampleIn formula, So is oil saturation, decimal；T2i is the lateral relaxation time of i-th of component,
ms；For the nuclear magnetic resonance hole relative volume corresponding to T2i component, decimal；AT2 is T2 saturation computation threshold values, ms, this reality
The value is 7ms in example.
Secondly, establishing the computation model of above-mentioned chloroform bitumen " A " weight percent according to the saturation degree of above-mentioned hydrocarbon source rock.
The computation model of chloroform bitumen " A " weight percent isIn formula, WAIndicate above-mentioned unit weight
The weight percent of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of amount；SoFor oil saturation；ФTThe total porosity of rock；ρoFor
The density of crude oil；ρBFor the density of above-mentioned hydrocarbon source rock.
Finally, calculating the weight percent of the above-mentioned chloroform bitumen " A " in the unit hydrocarbon source rock of above-mentioned different depth, Fig. 3
The 6th region 60 show chloroform bitumen " A " weight content that is calculated using computation model and chloroform that experiment obtains drips
Green " A " weight content, as can be seen from the figure the two has preferable consistency.
By the total porosity Ф of rockT, crude oil density po, hydrocarbon source rock density pBWith saturation degree So obtained above, generation
EnterObtain the weight percent of the above-mentioned chloroform bitumen " A " in the unit hydrocarbon source rock of different depth.
5th, building row hydrocarbon function calculates the weight of row's hydrocarbon of the hydrocarbon source rock of the Unit Weight of different depth
Specifically, the calculation formula of row's hydrocarbon index of building is Epeq=Ehgq-WA, in formula: EpeqIndicate above-mentioned hydrocarbon source rock
The weight for arranging hydrocarbon, characterizes row's hydrocarbon ability of above-mentioned hydrocarbon source rock；EhgqThe weight for indicating above-mentioned hydrocarbon primary rock producing hydrocarbon, characterizes hydrocarbon source rock
Hydrocarbon generation capacity；WAIndicate the weight percent of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of above-mentioned Unit Weight.
6th, building row hydrocarbon index function, calculates row's hydrocarbon index of different depth.
Specifically, the calculation formula of row's hydrocarbon index of building is Ipeq=Ehgq-A/Ehgq, in formula: IpeqFor above-mentioned hydrocarbon source rock
Row's hydrocarbon index；EhgqThe weight for indicating the hydrocarbon of the above-mentioned hydrocarbon source rock of Unit Weight, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；WATable
Show the weight percent of above-mentioned chloroform bitumen " A " in the above-mentioned hydrocarbon source rock of Unit Weight.
Fig. 3 and Fig. 4 are further described below, so that those skilled in the art can clearly understand this Shen
Technical solution please.
Fig. 3 shows total content of organic carbon and chloroform bitumen " A " calculated result.It include five in figure, each road Zhong Bao
Containing different curves or indicate different meanings, wherein first is well curve and Natural Gamma-ray Logging Curves, and second is
The reference axis of depth, third road are deep resistivity curve (solid line), middle resistivity curve (long dotted line) and shallow resistivity curve
(short dash line), the organic carbon weight percent in hydrocarbon source rock comprising the Unit Weight being calculated in the 4th is with change in depth
Curve (solid line) and the obtained hydrocarbon source rock of Unit Weight of experiment in organic carbon weight percent with change in depth curve
(dotted line), the weight percent in the 5th comprising depth with chloroform bitumen " A " in the hydrocarbon source rock for the Unit Weight being calculated
Relation curve (solid line) and part Experiment obtains corresponding depth and experiment obtains Unit Weight hydrocarbon source rock in chloroform bitumen
The relation curve (dotted line) of the weight percent of " A ".In terms of the comparative situation for calculating data and analysis data, total organic carbon is calculated
There is good consistency between content, chloroform bitumen " A " and assay value.
The well logging calculated result that Fig. 4 shows primary rock producing hydrocarbon hydrocarbon index, arranges hydrocarbon index.Include seven in figure, is for first
Hole diameter (dotted line) and Natural Gamma-ray Logging Curves (solid line), second are depth track, and it is density log song that third road, which is the 4th,
Line (solid line) and interval transit time curve (dotted line), the 5th include the hydrocarbon primary rock producing hydrocarbon for the Unit Weight being calculated weight with
The curve of change in depth, the 6th be the Unit Weight being calculated hydrocarbon source rock row hydrocarbon weight with change in depth curve,
7th arranges the relation curve of hydrocarbon index and depth for hydrocarbon source rock.Using the technology of the present invention realize hydrocarbon primary rock producing hydrocarbon ability and
Arrange the quantitative Continuous plus of hydrocarbon ability.
It can be seen from the above description that the above embodiments of the present invention realized the following chievements:
The construction method of the application can obtain hydrocarbon source rock row's hydrocarbon function and row's hydrocarbon index function, and then can be according to hydrocarbon
The Hydrocarbon yield of source rock and row's hydrocarbon ability of row's hydrocarbon index evaluation hydrocarbon source rock, hydrocarbon source rock row's hydrocarbon cannot be evaluated in the prior art by solving
The problem of ability, to the resource potential of objective understanding exploration target area and instructs next step exploration deployment that there is important reality to anticipate
Justice.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of row's hydrocarbon function of hydrocarbon source rock and the construction method for arranging hydrocarbon index function, which is characterized in that the construction method packet
It includes:
According to geochemistry experimental data, organic carbon hydrocarbon function is established；
The computation model for establishing organic carbon weight percent calculates the organic carbon in the hydrocarbon source rock of the Unit Weight of different depth
Weight percent；
According to the computation model of the weight percent of the organic carbon and the organic carbon hydrocarbon function, the list of different depth is calculated
The weight of the hydrocarbon primary rock producing hydrocarbon of position weight；
The weight percent computation model for establishing chloroform bitumen " A ", calculates in the Unit Weight hydrocarbon source rock of the different depth
The weight percent of the chloroform bitumen " A "；And
The chloroform according to the unit hydrocarbon source rock of the weight of the hydrocarbon of the hydrocarbon source rock of the different depth and the different depth
The weight percent of pitch " A ", building row's hydrocarbon function and row's hydrocarbon index function.
2. construction method according to claim 1, which is characterized in that the organic carbon hydrocarbon function are as follows:
Ehgq=g (TOC)
In formula:
TOC indicates the weight percent of the organic carbon in the hydrocarbon source rock of Unit Weight,
EhgqIndicate the weight of the hydrocarbon primary rock producing hydrocarbon of Unit Weight.
3. construction method according to claim 1, which is characterized in that the calculating mould for establishing organic carbon weight percent
Type, the step of calculating the weight percent of the organic carbon in the hydrocarbon source rock of the Unit Weight of different depth include:
Step A is fitted to resistivity song using the resistivity of the hydrocarbon source rock of different depth described in resistivity scanning log measurement
Line；
Step B establishes the computation model of the organic carbon weight percent according to the resistivity curve；And
Step C calculates the hydrocarbon source of the Unit Weight of the different depth according to the computation model of the organic carbon weight percent
The weight percent of organic carbon in rock.
4. construction method according to claim 3, which is characterized in that in the step A, the resistivity scanning well logging is
Microresistivity scanning well logging.
5. construction method according to claim 1, which is characterized in that the computation model of the organic carbon weight percent
Are as follows:
TOC=f1(Rt,DEN,DT)
In formula:
TOC indicates the weight percent of the organic carbon in the hydrocarbon source rock of Unit Weight；
RtIndicate the resistivity of the hydrocarbon source rock；
DEN indicates the density of the hydrocarbon source rock；
DT indicates the interval transit time of corresponding depth.
6. construction method according to claim 1, which is characterized in that described chloroform bitumen " A " weight percent established
Computation model calculates the weight percent of the chloroform bitumen " A " in the hydrocarbon source rock of the Unit Weight of the different depth
Than the step of include:
Step a calculates the saturation degree of the hydrocarbon source rock according to nuclear magnetic resonance log data；
Step b establishes the computation model of the chloroform bitumen " A " weight content according to the saturation degree of the hydrocarbon source rock；And
Step c calculates the weight percent of the chloroform bitumen " A " in the unit hydrocarbon source rock of the different depth.
7. construction method according to claim 6, which is characterized in that the calculation formula of the saturation degree of the hydrocarbon source rock are as follows:
In formula:
So is crude oil saturation degree, indicates the volume of hole shared by the crude oil and the percentage of the total pore volume；
T2iFor the lateral relaxation time of i-th of component in nuclear magnetic resonance pop；
ФiFor corresponding to the T2iHole relative volume percentage described in the nuclear magnetic resonance of component；
AT2 is T2Saturation computation threshold value, wherein T2T when for i=12i。
8. construction method according to claim 1, which is characterized in that the calculating mould of chloroform bitumen " A " weight content
Type are as follows:
In formula:
WAIndicate the weight percent of chloroform bitumen described in the hydrocarbon source rock of the Unit Weight " A "；
SoFor oil saturation；
ФTThe total porosity of rock；
ρoFor the density of crude oil；
ρBFor the density of the hydrocarbon source rock.
9. construction method according to claim 1, which is characterized in that row's hydrocarbon function are as follows:
Epeq=Ehgq-WA
In formula:
EpeqThe weight for indicating row's hydrocarbon of the hydrocarbon source rock of Unit Weight, characterizes row's hydrocarbon ability of the hydrocarbon source rock；
EhgqThe weight for indicating the hydrocarbon primary rock producing hydrocarbon of Unit Weight, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；
WAIndicate the weight percent of chloroform bitumen described in the hydrocarbon source rock of the Unit Weight " A ".
10. construction method according to claim 1 or 8, which is characterized in that row's hydrocarbon index function are as follows:
Ipeq=Ehgq-WA/Ehgq
In formula:
IpeqFor row's hydrocarbon index of the hydrocarbon source rock, the weight of row's hydrocarbon of the hydrocarbon source rock of Unit Weight and the weight of hydrocarbon are indicated
The ratio between amount；
EhgqThe weight for indicating the hydrocarbon of the hydrocarbon source rock of Unit Weight, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；
WAIndicate the weight percent of chloroform bitumen " A " described in the hydrocarbon source rock of Unit Weight.
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