CN106326516A - Establishment method for hydrocarbon expulsion function and hydrocarbon expulsion index function of hydrocarbon source rocks - Google Patents
Establishment method for hydrocarbon expulsion function and hydrocarbon expulsion index function of hydrocarbon source rocks Download PDFInfo
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Abstract
The invention provides an establishment method for a hydrocarbon expulsion function and a hydrocarbon expulsion index function of hydrocarbon source rocks. The establishment method comprises the steps of establishing a hydrocarbon generation function of organic carbon according to geochemical experiment data; building a computing model of weight percentage of the organic carbon, and calculating the weight percentages of the organic carbon in the hydrocarbon source rocks of unit weight and different depths; calculating the weights of generated hydrocarbons of the hydrocarbon source rocks of the unit weight and the different depths; building a weight percentage computing model of chloroform bitumen ''A'', and calculating the weight percentages of the chloroform bitumen ''A'' in the hydrocarbon source rocks of the unit weight and the different depths; and establishing the hydrocarbon expulsion function and the hydrocarbon expulsion index function according to the weights of the generated hydrocarbons of the hydrocarbon source rocks of the different depths and the weight percentages of the chloroform bitumen ''A'' in the unit hydrocarbon source rocks of the different depths. According to the establishment method, the problem that the hydrocarbon expulsion capability of the hydrocarbon source rocks cannot be evaluated in the prior art is solved.
Description
Technical field
The present invention relates to oil and geologic prospect technical field, the row's hydrocarbon function in particular to a kind of hydrocarbon source rock refers to row's hydrocarbon
The construction method of number function.
Background technology
In conventional gas and oil is explored, hydrocarbon source rock Hydrocarbon yield is one of important research content of exploration target area, and the research is to objective
Recognize the resource potential of exploration target area and instruct next step exploration deployment all to have important practical significance.
Along with the rise of unconventionaloil pool exploration and development, hydrocarbon source rock characteristic as one of three basic research contents of unconventional resource,
Having caused great attention both domestic and external, an important research content in hydrocarbon source rock characteristic is exactly row's hydrocarbon ability of hydrocarbon source rock.
The evaluation of hydrocarbon source rock row's hydrocarbon ability is typically to utilize geochemical method, the organic geochemical ginseng of reflection hydrocarbon source rock row's hydrocarbon ability
Number predominantly multiple parameters such as free hydrocarbon content " S1 " and chloroform bitumen " A ", owing to free hydrocarbon is contained by existing Logging Evaluation Method
The sensitivity of the hydrocarbon source rock geochemical indexs such as amount " S1 " and chloroform bitumen " A " is poor, so, application Logging Evaluation Method at present
Total content of organic carbon " TOC " can be analyzed with parameters such as pyrolysed hydrocarbon content " S2 ".
Therefore, the construction method of a kind of row's hydrocarbon function and row's hydrocarbon index function is needed badly.
Summary of the invention
Present invention is primarily targeted at the construction method of row's hydrocarbon function and row's hydrocarbon index function that a kind of hydrocarbon source rock is provided, to solve
The problem that can not evaluate row's hydrocarbon ability of hydrocarbon source rock in prior art exactly.
To achieve these goals, according to an aspect of the invention, it is provided row's hydrocarbon function of a kind of hydrocarbon source rock with row hydrocarbon index
The construction method of function, above-mentioned construction method includes: base area Geochemistry experimental data, sets up organic carbon hydrocarbon function；Set up
The computation model of organic carbon percentage by weight, the percentage by weight of the organic carbon in the hydrocarbon source rock of the Unit Weight calculating different depth；
The computation model of the percentage by weight according to above-mentioned organic carbon and above-mentioned organic carbon hydrocarbon function, calculate the Unit Weight of different depth
The weight of above-mentioned hydrocarbon primary rock producing hydrocarbon；Set up the percentage by weight computation model of chloroform bitumen " A ", calculate above-mentioned different depth
The percentage by weight of the above-mentioned chloroform bitumen " A " in Unit Weight hydrocarbon source rock；And the life of the hydrocarbon source rock according to above-mentioned different depth
The percentage by weight of above-mentioned chloroform bitumen " A " in the unit hydrocarbon source rock of the weight of hydrocarbon and above-mentioned different depth, the row's of structure hydrocarbon function with
Row's hydrocarbon index function.
Further, above-mentioned organic carbon hydrocarbon function is Ehgq=g (TOC), in formula, the hydrocarbon source rock of TOC representation unit weight
In the percentage by weight of organic carbon, EhgqThe weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of representation unit weight.
Further, the above-mentioned computation model setting up organic carbon percentage by weight, calculate the hydrocarbon source rock of the Unit Weight of different depth
In the step of percentage by weight of organic carbon include: step A, use the hydrocarbon of the resistivity scanning above-mentioned different depth of log measurement
The resistivity of source rock, fits to resistivity curve；Step B, according to above-mentioned resistivity curve, sets up above-mentioned organic carbon weight percent
The computation model of ratio；And step C, according to the computation model of above-mentioned organic carbon percentage by weight, calculate the list of above-mentioned different depth
The percentage by weight of the organic carbon in the hydrocarbon source rock of position weight.
Further, in above-mentioned steps A, the scanning well logging of above-mentioned resistivity is microresistivity scanning well logging.
Further, the computation model of above-mentioned organic carbon percentage by weight is TOC=f1(Rt, DEN, DT), in formula, TOC
The percentage by weight of the organic carbon in the above-mentioned hydrocarbon source rock of representation unit weight, RtRepresent the resistivity of above-mentioned hydrocarbon source rock；DEN table
Show the density of above-mentioned hydrocarbon source rock；DT represents the interval transit time of the corresponding degree of depth.
Further, the above-mentioned computation model setting up chloroform bitumen " A " percentage by weight, calculate the unit weight of above-mentioned different depth
The step of the percentage by weight of the above-mentioned chloroform bitumen " A " in the above-mentioned hydrocarbon source rock of amount including: step a, surveys according to nuclear magnetic resonance, NMR
Well data, calculate the saturation of above-mentioned hydrocarbon source rock；Step b, according to the saturation of above-mentioned hydrocarbon source rock, sets up above-mentioned chloroform bitumen " A "
The computation model of weight content；And step c, calculate the above-mentioned chloroform bitumen " A " in the unit hydrocarbon source rock of above-mentioned different depth
Percentage by weight.
Further, the computing formula of the saturation of above-mentioned hydrocarbon source rock isIn formula, So
For crude oil saturation, represent the volume of hole shared by above-mentioned crude oil and the percentage ratio of above-mentioned total pore volume；T2iFor nuclear magnetic resonance, NMR
The T2 of i-th component in POP；For the nuclear magnetic resonance, NMR above-mentioned hole relative volume hundred corresponding to above-mentioned T2i component
Proportion by subtraction；AT2 is T2 saturation computation threshold values.
Further, the computation model of above-mentioned chloroform bitumen " A " weight content isIn formula, WATable
Show the percentage by weight of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of above-mentioned Unit Weight；SoFor oil saturation；ФTRock
Total porosity；ρoDensity for crude oil；ρBDensity for above-mentioned hydrocarbon source rock.
Further, above-mentioned row's hydrocarbon function is Epeq=Ehgq-WA, in formula, EpeqThe above-mentioned hydrocarbon of representation unit weight
The weight of row's hydrocarbon of source rock, characterizes row's hydrocarbon ability of above-mentioned hydrocarbon source rock；EhgqThe weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of representation unit weight,
Characterize the hydrocarbon generation capacity of hydrocarbon source rock；WARepresent the percentage by weight 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, IpeqRow's hydrocarbon for above-mentioned hydrocarbon source rock
Index, the weight of row's hydrocarbon of the above-mentioned hydrocarbon source rock of representation unit weight and the weight of hydrocarbon；EhgqThe above-mentioned hydrocarbon source of representation unit weight
The weight of the hydrocarbon of rock, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；WAAbove-mentioned chloroform bitumen " A " in the above-mentioned hydrocarbon source rock of representation unit weight
Percentage by weight.
Hydrocarbon source rock row's hydrocarbon function and row's hydrocarbon index function can be obtained, and then can comment with row's hydrocarbon index according to the Hydrocarbon yield of hydrocarbon source rock
Row's hydrocarbon ability of valency hydrocarbon source rock, solves the problem that can not evaluate hydrocarbon source rock row's hydrocarbon ability in prior art, explores objective knowledge
The resource potential of target area and instruct next step exploration deployment to have important practical significance.
Accompanying drawing explanation
The Figure of description of the part constituting the application is used for providing a further understanding of the present invention, and the present invention's is schematic real
Execute example and illustrate for explaining the present invention, being not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the schematic flow sheet of the construction method of row's hydrocarbon index that a kind of exemplary embodiment of the application provides；
Fig. 2 shows weight and the organic carbon content of white clouds matter mud stone that a kind of preferred embodiment of the application provides and the hydrocarbon of mud stone
Relation curve；
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.
Detailed description of the invention
It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
A kind of typical embodiment of the application provides row's hydrocarbon function of a kind of hydrocarbon source rock and the construction method of row's hydrocarbon index function,
As it is shown in figure 1, this construction method includes: base area Geochemistry experimental data, set up organic carbon hydrocarbon function, organic carbon hydrocarbon
Function is the functional relationships of the organic carbon percentage by weight in the hydrocarbon source rock of unit weight and the weight of the hydrocarbon primary rock producing hydrocarbon of Unit Weight
System；Set up the computation model of organic carbon percentage by weight, the weight of the organic carbon in the hydrocarbon source rock of the Unit Weight calculating different depth
Amount percentage ratio；Computation model according to above-mentioned organic carbon percentage by weight and above-mentioned unit organic carbon hydrocarbon function, calculate different deep
The weight of the hydrocarbon of the above-mentioned hydrocarbon source rock of Unit Weight of degree；Set up the percentage by weight computation model of chloroform bitumen " A ", in calculating
The percentage by weight of the above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of the Unit Weight stating different depth；And it is deep according to above-mentioned difference
The weight of hydrocarbon of the hydrocarbon source rock of degree and the percentage by weight of above-mentioned chloroform bitumen " A " in the unit hydrocarbon source rock of above-mentioned different depth,
The row's of structure hydrocarbon function and row's hydrocarbon index function.
Apply above-mentioned construction method, it is possible to obtain hydrocarbon source rock row's hydrocarbon function and row's hydrocarbon index function, and then can be according to hydrocarbon source rock
Hydrocarbon yield and row's hydrocarbon index evaluate row's hydrocarbon ability of hydrocarbon source rock, solve and prior art can not be evaluated hydrocarbon source rock row's hydrocarbon ability
Problem, to the resource potential of objective knowledge exploration target area with instruct next step exploration deployment to have important practical significance.
In order to obtain single organic carbon hydrocarbon function accurately, the organic carbon hydrocarbon function of the preferred above-mentioned Unit Weight of the application is
Ehgq=g (TOC), wherein, the percentage by weight of the organic carbon in the hydrocarbon source rock of TOC representation unit weight, unit is %,
EhgqThe weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of representation unit weight, the organic carbon of corresponding different content, the hydrocarbon function of its correspondence is not
Identical.
In another preferred embodiment of the application, the above-mentioned computation model setting up organic carbon percentage by weight, calculate different deep
The step of the organic carbon percentage by weight in the hydrocarbon source rock of the Unit Weight of degree includes: step A, uses resistivity scanning well logging to survey
Measure the resistivity of the hydrocarbon source rock of above-mentioned different depth, fit to resistivity curve；Step B, according to above-mentioned resistivity curve, sets up
The computation model of above-mentioned organic carbon percentage by weight；And step C, according to the computation model of above-mentioned organic carbon percentage by weight, meter
Count stating the percentage by weight of the organic carbon in the hydrocarbon source rock of the Unit Weight of different depth in.Drawn different deep by above-mentioned step
The percentage by weight of the organic carbon of degree, and then the organic of different depth can be calculated according to above-mentioned organic carbon hydrocarbon function
The hydrocarbon amount of carbon.
Owing to stratum, study area mostly is the thin layer of Centimeter Level, conventional resistive rate well logging resolution is low, the longitudinal resolution of dual laterolog
Rate is typically larger than 0.4m, and thickness is less than 0.5m, usual None-identified thin layer, directly utilizes deep resistivity and the sound of conventional logging
The TOC precision that the ripple time difference calculates is relatively low, in order to improve the computational accuracy of TOC, and the scanning well logging of the application preferred above-mentioned resistivity
For microresistivity scanning well logging, microresistivity scanning well logging resolution is high, has preferable recognition reaction to Thin oil sandwich, is more than
The thin layer of 0.05m is the most recognizable.
In the another kind of preferred embodiment of the application, the computation model of above-mentioned organic carbon percentage by weight is
TOC=f1In (Rt, DEN, DT) formula, the percentage by weight of the organic carbon in the above-mentioned hydrocarbon source rock of TOC representation unit weight；
RtRepresent the resistivity of above-mentioned hydrocarbon source rock；DEN represents the density of above-mentioned hydrocarbon source rock；DT represents the interval transit time of the corresponding degree of depth, shadow
Ringing TOC and also include some other log parameters sensitive to organic carbon content, those skilled in the art can be true according to practical situation
Determine the Practical Calculation model of organic carbon percentage by weight.Use this computation model can accurately obtain in the hydrocarbon source rock of different depth
The percentage by weight of organic carbon, and then row's hydrocarbon index of hydrocarbon source rock can be calculated exactly.
In the application another kind preferred embodiment, the most above-mentioned computation model setting up chloroform bitumen " A " weight percent amount,
The step of the percentage by weight of the above-mentioned chloroform bitumen " A " in the above-mentioned hydrocarbon source rock of the Unit Weight calculating above-mentioned different depth including:
Step a, according to nuclear magnetic resonance log data, calculates the saturation of above-mentioned hydrocarbon source rock；Step b, saturated according to above-mentioned hydrocarbon source rock
Degree, sets up the computation model of above-mentioned chloroform bitumen " A " weight content；And step c, calculate the unit hydrocarbon of above-mentioned different depth
The percentage by weight of the above-mentioned chloroform bitumen " A " in source rock.Use the method can set up chloroform bitumen " A " weight content
Computation model, and then the percentage by weight of chloroform bitumen " A " can be calculated according to this computation model, and then according to the chloroform drawn
The percentage by weight of Colophonium " A " carries out arranging the structure of hydrocarbon index, overcomes and can not get chloroform bitumen " A " accurately in prior art
The problem of percentage by weight, the structure for row's hydrocarbon index provides sound assurance.
In order to obtain the percentage by weight of above-mentioned chloroform bitumen " A ", this Shen in the hydrocarbon source rock of Unit Weight in quick mode the most accurately
Please the computing formula of saturation of preferred above-mentioned hydrocarbon source rock beIn formula, So is that crude oil is saturated
Degree, represents the volume of hole shared by above-mentioned crude oil and the percentage ratio of above-mentioned total pore volume；T2iFor in nuclear magnetic resonance, NMR POP i-th
The T2 of individual component；For the nuclear magnetic resonance, NMR above-mentioned hole relative volume percentage ratio corresponding to above-mentioned T2i component；AT2
For T2 saturation computation threshold values.
In the another kind of preferred embodiment of the application, the computation model of above-mentioned chloroform bitumen " A " weight content isIn formula, WARepresent the percentage by weight of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of above-mentioned Unit Weight；
SoFor oil saturation；ФTThe total porosity of rock；ρoDensity for crude oil；ρBDensity for above-mentioned hydrocarbon source rock.Use this chlorine
The computation model of imitative Colophonium " A " weight content can be more precisely computed and draw chloroform bitumen " A " weight content, and then obtains
Arrange hydrocarbon index accurately.
In a kind of preferred embodiment of the application, row's hydrocarbon function of structure is Epeq=Ehgq-WA, in formula, EpeqRepresent
The weight of row's hydrocarbon of the above-mentioned hydrocarbon source rock of Unit Weight, characterizes row's hydrocarbon ability of above-mentioned hydrocarbon source rock；EhgqRepresentation unit weight above-mentioned
The weight of hydrocarbon primary rock producing hydrocarbon, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；WARepresent above-mentioned chloroform bitumen in the hydrocarbon source rock of above-mentioned Unit Weight
The percentage by weight of " A ".
In the another kind of preferred embodiment of the application, the most 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 representation unit weight and the weight of hydrocarbon；
EhgqThe weight of the hydrocarbon of the above-mentioned hydrocarbon source rock of representation unit weight, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；WARepresentation unit weight
The percentage by weight of above-mentioned chloroform bitumen " A " in above-mentioned hydrocarbon source rock.
In order to enable those skilled in the art clearly to understand this programme, below with certain densification of the Junggar Basin Permian System
As a example by row's hydrocarbon function of the hydrocarbon source rock of oilfield and the construction method of row's hydrocarbon index function, the technical scheme of the application is carried out in detail
Ground explanation.
The fine-grained sediment that fine and close oil reservoir is salified lacustrine environment in this region, the principal lithologic of hydrocarbon source rock is mud stone, can be divided into
Purer mud stone, grey matter mud stone, cloud matter mud stone, silty etc., the mud stone of these different characteristics the most all contains organic matter, but
Owing to depositional environment, thing spacing are from the difference of the aspects such as, Source Organic Matter and water depth, there is some difference for its row's hydrocarbon ability.
The detailed process of construction method clapping hydrocarbon index of hydrocarbon source rock is divided into following step:
The first, applied geochemistry experimental data, sets up organic carbon hydrocarbon function
Organic carbon percentage by weight during organic carbon hydrocarbon function is the hydrocarbon source rock of unit weight in the application and the primary rock producing hydrocarbon of Unit Weight
The functional relationship of the weight of hydrocarbon.It is specially Ehgq=g (TOC), in formula, EhgqThe weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of representation unit weight
Amount, the percentage by weight of the hydrocarbon source rock organic carbon of TOC Unit Weight.
In identical hydrocarbon source rock, between organic carbon percentage by weight and the weight of hydrocarbon, there is positive correlation, i.e. organic carbon weight
Amount percentage ratio increases, and the weight of hydrocarbon also increases, but in the case of different organic carbon percentage by weight, the organic carbon of Unit Weight
The weight of hydrocarbon may exist the hydrocarbon conversion ratio of the organic carbon of difference, i.e. Unit Weight may exist difference.Fig. 2 goes out
The weight of the hydrocarbon of the organic carbon of the Unit Weight of white clouds matter mud stone and mud stone with organic carbon percentage by weight in this embodiment region
Change curve.
Further, in this region, for white clouds matter mud stone, the hydrocarbon function of organic carbon is:
The second, the computation model of organic carbon percentage by weight is set up, organic in the hydrocarbon source rock of the Unit Weight calculating different depth
The percentage by weight of carbon
First, use the resistivity of the hydrocarbon source rock of the microresistivity scanning above-mentioned different depth of log measurement, fit to resistivity curve.
Owing to the stratum of survey region mostly is the thin layer of Centimeter Level, conventional resistive rate well logging resolution is low, the longitudinal direction of dual laterolog
Resolution is typically larger than 0.4m, and thickness is less than the usual None-identified of 0.5m thin layer, directly utilizes deep resistivity and the sound of conventional logging
The TOC precision that the ripple time difference calculates is relatively low；And micro-resisitivity image resolution is high, thin reservoir is had preferably knowledge
Not acting on, the thin layer more than 0.05m is the most recognizable.Efficiently solving the technical barrier of thin layer identification and evaluation, draw is organic
The precision of carbon weight percent values is greatly improved.Utilize the feature that micro-resisitivity image resolution is high, use at dimensionality reduction
Reason and segmentation log-linear scale method, synthesized high resolution resistivity curve.
The functional relationship that this curve is corresponding isIn formula, the height of R synthesis
Differentiate resistivity curve, unit Ω .m, RBaselineResistivity meansigma methods at nonhydrocarbon hydrocarbon source rock section overlapping, unit Ω .m, DT are
The interval transit time of the corresponding degree of depth, unit μ s/ft, DTBaselineAverage interval transit time at nonhydrocarbon hydrocarbon source rock section overlapping, unit μ s/ft.
Secondly, according to above-mentioned resistivity curve, the computation model of above-mentioned organic carbon percentage by weight is set up.
Rule of thumb, the computation model drawing organic carbon percentage by weight is TOC=(Δ lgR) × 102.297-0.1688×LOM,
In formula, TOC is the percentage by weight of the organic carbon in the hydrocarbon source rock of unit weight, the Maturity calibration factor that LOM is organic,
LOM=0.0989 × VR5-2.1587×VR4+12.392×VR3-29.032×VR2+ 32.53 × VR-3.0338, wherein,
VR is reflectance of vitrinite, without guiding principle amount, in this example, RBaselineIt is 5 Ω .m, DTBaselineBeing 90 μ s/ft, VR is 0.9.
Finally, according to the computation model of the above-mentioned organic carbon percentage by weight drawn, the hydrocarbon source of the Unit Weight of different depth is calculated
The percentage by weight of the organic carbon of rock.5th region 50 of Fig. 3 shows the reality of organic carbon percentage by weight result of calculation and part
Test result, show to use computation model calculated organic carbon percentage by weight and experimental result to have good concordance.
3rd, the weight of the above-mentioned hydrocarbon primary rock producing hydrocarbon of the Unit Weight of calculating different depth is according to the weight of the organic carbon calculated
Percentage ratio 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 Weight
The weight of crude oil that generates of hydrocarbon source rock.
4th, set up the percentage by weight computation model of chloroform bitumen " A ", calculate the Unit Weight hydrocarbon source rock of above-mentioned different depth
In the percentage by weight of above-mentioned chloroform bitumen " A "
First, according to nuclear magnetic resonance log data, the saturation of above-mentioned hydrocarbon source rock is calculated.
Owing to the wettability of example region hydrocarbon source rock changes greatly, other method error calculated of oil saturation is relatively big, so
Utilizing NMR logging data to represent the oil saturation of hydrocarbon source rock in this example, concrete formula is such asIn formula, So is oil saturation, decimal；When T2i is the transverse relaxation of i-th component
Between, ms；For the nuclear magnetic resonance, NMR hole relative volume corresponding to T2i component, decimal；AT2 is T2 saturation computation threshold values,
Ms, in this example, this value is 7ms.
Secondly, according to the saturation of above-mentioned hydrocarbon source rock, the computation model of above-mentioned chloroform bitumen " A " percentage by weight is set up.
The computation model of chloroform bitumen " A " percentage by weight isIn formula, WARepresent above-mentioned unit weight
The percentage by weight of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of amount；SoFor oil saturation；ФTThe total porosity of rock；ρo
Density for crude oil；ρBDensity for above-mentioned hydrocarbon source rock.
Finally, the percentage by weight of above-mentioned chloroform bitumen " A " in the unit hydrocarbon source rock of above-mentioned different depth, the of Fig. 3 are calculated
Six regions 60 show the chloroform bitumen " A " using computation model calculated chloroform bitumen " A " weight content to obtain with experiment
Weight content, as can be seen from the figure the two has preferable concordance.
By the total porosity Ф of rockT, the density p of crude oilo, the density p of hydrocarbon source rockBWith saturation So obtained above, substitute intoObtain the percentage by weight of above-mentioned chloroform bitumen " A " in the unit hydrocarbon source rock of different depth.
5th, the row's of structure hydrocarbon function, calculates the weight of row's hydrocarbon of the hydrocarbon source rock of the Unit Weight of different depth
Specifically, the computing formula of row's hydrocarbon index of structure is Epeq=Ehgq-WA, in formula: EpeqRepresent above-mentioned hydrocarbon source rock
Row hydrocarbon weight, characterize row's hydrocarbon ability of above-mentioned hydrocarbon source rock；EhgqRepresent the weight of above-mentioned hydrocarbon primary rock producing hydrocarbon, characterize hydrocarbon source rock
Hydrocarbon generation capacity；WARepresent the percentage by weight of above-mentioned chloroform bitumen " A " in the hydrocarbon source rock of above-mentioned Unit Weight.
6th, the row's of structure hydrocarbon index function, calculates row's hydrocarbon index of different depth.
Specifically, the computing formula of row's hydrocarbon index of structure is Ipeq=Ehgq-A/Ehgq, in formula: IpeqRow for above-mentioned hydrocarbon source rock
Hydrocarbon index；EhgqThe weight of the hydrocarbon of the above-mentioned hydrocarbon source rock of representation unit weight, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；WARepresent single
The percentage by weight of above-mentioned chloroform bitumen " A " in the above-mentioned hydrocarbon source rock of position weight.
Below Fig. 3 with Fig. 4 is further described, so that those skilled in the art can clearly understand the application's
Technical scheme.
Fig. 3 shows total content of organic carbon and chloroform bitumen " A " result of calculation.Figure comprises five roads, each road comprises not
With curve or represent different implication, wherein, first is CAL and Natural Gamma-ray Logging Curves, and second is the degree of depth
Coordinate axes, the 3rd road is that deep resistivity curve (solid line), middle resistivity curve (long dotted line) and shallow resistivity curve are (short
Dotted line), the 4th road comprises the curve with change in depth of the organic carbon percentage by weight in the hydrocarbon source rock of calculated Unit Weight
Organic carbon percentage by weight in the hydrocarbon source rock of Unit Weight that (solid line) and experiment obtain with the curve (dotted line) of change in depth,
5th road comprises the degree of depth and the relation curve of the percentage by weight of chloroform bitumen " A " in the hydrocarbon source rock of calculated Unit Weight
(solid line) and part Experiment obtain the corresponding degree of depth and the weight hundred of chloroform bitumen " A " in the hydrocarbon source rock testing the Unit Weight obtained
The relation curve (dotted line) of proportion by subtraction.In terms of calculating data with the contrast situation of analytical data, calculate total content of organic carbon, chloroform drip
Between blue or green " A " and assay value, there is good concordance.
Fig. 4 shows primary rock producing hydrocarbon hydrocarbon index, the well logging result of calculation of row's hydrocarbon index.Figure includes seven roads, and first is hole diameter
(dotted line) and Natural Gamma-ray Logging Curves (solid line), second is depth track, the 3rd road be the 4th road be that density log curve is (real
Line) and interval transit time curve (dotted line), the 5th road includes that the weight of the hydrocarbon primary rock producing hydrocarbon of calculated Unit Weight becomes with the degree of depth
The curve changed, the 6th road is the weight curve with change in depth of hydrocarbon source rock row's hydrocarbon of calculated Unit Weight, and the 7th road is
Hydrocarbon source rock row's hydrocarbon index and the relation curve of the degree of depth.The technology of the present invention is utilized to achieve hydrocarbon primary rock producing hydrocarbon ability and arrange hydrocarbon ability
Quantitatively Continuous plus.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect:
The construction method of the application, it is possible to obtain hydrocarbon source rock row's hydrocarbon function and row's hydrocarbon index function, and then can be according to hydrocarbon source rock
Hydrocarbon yield evaluates row's hydrocarbon ability of hydrocarbon source rock with row's hydrocarbon index, solves and can not evaluate asking of hydrocarbon source rock row's hydrocarbon ability in prior art
Topic, to the resource potential of objective knowledge exploration target area with instruct next step exploration deployment to have important practical significance.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of being made, etc.
With replacement, improvement etc., should be included within the scope of the present invention.
Claims (10)
1. the construction method arranging hydrocarbon function and row's hydrocarbon index function of a hydrocarbon source rock, it is characterised in that described construction method includes:
Base area Geochemistry experimental data, sets up organic carbon hydrocarbon function；
Set up the computation model of organic carbon percentage by weight, the organic carbon in the hydrocarbon source rock of the Unit Weight calculating different depth
Percentage by weight；
The computation model of the percentage by weight according to described organic carbon and described organic carbon hydrocarbon function, calculate different depth
The weight of the described hydrocarbon primary rock producing hydrocarbon of Unit Weight；
Set up the percentage by weight computation model of chloroform bitumen " A ", calculate in the Unit Weight hydrocarbon source rock of described different depth
The percentage by weight of described chloroform bitumen " A "；And
Chloroform described in the weight of the hydrocarbon of the hydrocarbon source rock according to the described different depth unit hydrocarbon source rock with described different depth
The percentage by weight of Colophonium " A ", the row's of structure hydrocarbon function and row's hydrocarbon index function.
Construction method the most according to claim 1, it is characterised in that described organic carbon hydrocarbon function is:
Ehgq=g (TOC)
In formula:
The percentage by weight of the organic carbon in the hydrocarbon source rock of TOC representation unit weight,
EhgqThe weight of the described hydrocarbon primary rock producing hydrocarbon of representation unit weight.
Construction method the most according to claim 1, it is characterised in that the described computation model setting up organic carbon percentage by weight,
The step of the percentage by weight of the organic carbon in the hydrocarbon source rock of the Unit Weight calculating different depth includes:
Step A, uses the resistivity of the hydrocarbon source rock of different depth described in resistivity scanning log measurement, fits to resistivity
Curve；
Step B, according to described resistivity curve, sets up the computation model of described organic carbon percentage by weight；And
Step C, according to the computation model of described organic carbon percentage by weight, calculates the Unit Weight of described different depth
The percentage by weight of the organic carbon in hydrocarbon source rock.
Construction method the most according to claim 3, it is characterised in that in described step A, the scanning well logging of described resistivity is
Microresistivity scanning well logging.
Construction method the most according to claim 1, it is characterised in that the computation model of described organic carbon percentage by weight is:
TOC=f1(Rt,DEN,DT)
In formula:
The percentage by weight of the organic carbon in the described hydrocarbon source rock of TOC representation unit weight；
RtRepresent the resistivity of described hydrocarbon source rock；
DEN represents the density of described hydrocarbon source rock；
DT represents the interval transit time of the corresponding degree of depth.
Construction method the most according to claim 1, it is characterised in that the described meter setting up chloroform bitumen " A " percentage by weight
Calculate model, the weight percent of the described chloroform bitumen " A " in the described hydrocarbon source rock of the Unit Weight calculating described different depth
The step of ratio includes:
Step a, according to nuclear magnetic resonance log data, calculates the saturation of described hydrocarbon source rock；
Step b, according to the saturation of described hydrocarbon source rock, sets up the computation model of described chloroform bitumen " A " weight content；
And
Step c, calculates the percentage by weight of described chloroform bitumen " A " in the unit hydrocarbon source rock of described different depth.
Construction method the most according to claim 6, it is characterised in that the computing formula of the saturation of described hydrocarbon source rock is:
In formula:
So is crude oil saturation, represents the volume of hole shared by described crude oil and the percentage ratio of described total pore volume；
T2iFor the T2 of i-th component in nuclear magnetic resonance, NMR POP；
For hole relative volume percentage ratio described in the nuclear magnetic resonance, NMR corresponding to described T2i component；
AT2 is T2 saturation computation threshold values.
Construction method the most according to claim 1, it is characterised in that the computation model of described chloroform bitumen " A " weight content
For:
In formula:
WARepresent the percentage by weight of chloroform bitumen " A " described in the hydrocarbon source rock of described Unit Weight；
SoFor oil saturation；
ФTThe total porosity of rock；
ρoDensity for crude oil；
ρBDensity for described hydrocarbon source rock.
Construction method the most according to claim 1, it is characterised in that described row's hydrocarbon function is:
Epeq=Ehgq-WA
In formula:
EpeqThe weight of row's hydrocarbon of the described hydrocarbon source rock of representation unit weight, characterizes row's hydrocarbon ability of described hydrocarbon source rock；
EhgqThe weight of the described hydrocarbon primary rock producing hydrocarbon of representation unit weight, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；
WARepresent the percentage by weight of chloroform bitumen " A " described in the hydrocarbon source rock of described Unit Weight.
10. according to the construction method described in claim 1 or 8, it is characterised in that described row's hydrocarbon index function is:
Ipeq=Ehgq-WA/Ehgq
In formula:
IpeqFor row's hydrocarbon index of described hydrocarbon source rock, the weight of row's hydrocarbon of the described hydrocarbon source rock of representation unit weight and the weight of hydrocarbon
Amount；
EhgqThe weight of the hydrocarbon of the described hydrocarbon source rock of representation unit weight, characterizes the hydrocarbon generation capacity of hydrocarbon source rock；
WAThe percentage by weight of chloroform bitumen " A " described in the described hydrocarbon source rock of representation unit weight.
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