CN106443823A - carbonate rock asphalt reservoir well logging identifying method - Google Patents
carbonate rock asphalt reservoir well logging identifying method Download PDFInfo
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- CN106443823A CN106443823A CN201610806998.3A CN201610806998A CN106443823A CN 106443823 A CN106443823 A CN 106443823A CN 201610806998 A CN201610806998 A CN 201610806998A CN 106443823 A CN106443823 A CN 106443823A
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Abstract
The invention discloses a carbonate rock asphalt reservoir well logging identifying method and belongs to the field of oil field exploration and development. The method includes the following steps: implementing well logging to acquire plural groups of a first sensitive parameter value and a second sensitive parameter value of a to-be-tested carbonate rock asphalt reservoir; substituting the tested plural groups of a first sensitive parameter value and a second sensitive parameter value of the to-be-tested carbonate rock asphalt reservoir into a carbonate rock asphalt reservoir identifying plate, one of the x-axis coordinate and the y-axis coordinate of the carbonate rock asphalt reservoir identifying plate being the first sensitive parameter value and the other one being a second sensitive parameter value, the carbonate rock asphalt reservoir identifying plate including a fitting boundary between an asphalt reservoir and an asphalt-free reservoir; based on the position relation between the plural groups of a first sensitive parameter value and a second sensitive parameter value of the to-be-tested carbonate rock asphalt reservoir and the fitting boundary to obtain the result of the identification of the carbonate rock asphalt reservoir. The method can rapidly identify the asphalt reservoir and further increase the coincidence rate of well logging tests of the carbonate rock asphalt reservoir.
Description
Technical field
The invention belongs to oilfield prospecting developing field, particularly to a kind of carbonate rock bitumen reservoir well logging recognition side
Method.
Background technology
At home and abroad a lot of carbonate reservoirs, had been found that Colophonium in the exploitation of clastic reservoir rock, this explanation Colophonium is deposited
It is in the middle of reservoir to be a kind of commonplace geological phenomenon.Colophonium, has high-viscosity semi liquid state or solid-state as a kind of
Mixture, its presence not only reduces the porosity of reservoir, and reduces the permeability of reservoir, has had a strong impact on reservoir
Physical property and production capacity, and formation mechenism under different geological conditions for the Colophonium, chemical constitution composition and changes of contents are very big.How
Bitumen reservoir is carried out with well logging recognition and evaluation, the exploration and development demand more fully meeting Carbonate Oil gas field just seems outstanding
For important.
The contrast mainly according to two mouthfuls of borehole logging tool curves of Oil Field for the existing bitumen reservoir Logging Identification Method at present
Analysis, it is indicated that the logging response character of bituminous sandstone reservoir, sets up neutron qualitative with density intersection gamma Z value figure bitumen reservoir
Identification plate, carries out bitumen reservoir well logging using neutron and density intersection gamma Z value figure bitumen reservoir qualitative recognition plate and knows
Not.
During realizing the present invention, the inventors discovered that at least there is problems with prior art：
What neutron and density intersection gamma Z value figure bitumen reservoir qualitative recognition plate were mainly suitable for is clastic reservoir rock, and
Clastic reservoir rock and carbonate reservoir logging response character there is larger difference so that neutron and density intersection gamma Z
Value figure bitumen reservoir qualitative recognition plate is not suitable for carbonate reservoir and surveys it is impossible to meet Carbonate Oil gas field bitumen reservoir
Visit the demand of exploitation it is impossible to enough quickly identification bitumen reservoir, have impact on the coincidence rate of carbonate rock bitumen reservoir well log interpretation.
Content of the invention
In order to identify carbonate rock bitumen reservoir, the present invention provides a kind of carbonate rock bitumen reservoir Logging Identification Method.
Specifically, including following technical scheme：
A kind of carbonate rock bitumen reservoir Logging Identification Method, methods described includes：
Well logging obtains multigroup first sensitive parameter value and the second sensitive parameter value of carbonate reservoir to be measured；
Multigroup first sensitive parameter value of the carbonate reservoir described to be measured recording and the second sensitive parameter value are substituted into
In carbonate rock bitumen reservoir identification plate, described carbonate rock bitumen reservoir identifies in the abscissa and vertical coordinate of plate
Individual is the first sensitive parameter, and another is the second sensitive parameter, and described carbonate rock bitumen reservoir identification plate includes bituminous
Reservoir and without the fitted dividing curve between bitumen reservoir；
Multigroup first sensitive parameter value according to described carbonate reservoir to be measured and the second sensitive parameter value and described plan
Close marginal position relationship, obtain the recognition result of carbonate rock bitumen reservoir.
Further, described carbonate rock bitumen reservoir identifies that the mode of setting up of plate includes：
The multigroup first sensitive ginseng is obtained respectively from bituminous reservoir with the Oil Field well-log information without bitumen reservoir
Numerical value and the second sensitive parameter value, form multigroup material point, and matching obtain material point and the storage of not bituminous of bituminous reservoir
Fitted dividing curve between the material point of layer, forms described carbonate rock bitumen reservoir and identifies plate.
Further, before described carbonate rock bitumen reservoir identification plate is set up, also include：
Carry out contrast test before and after rock core Colophonium dissolving, finding out two from the test data obtaining, be combined with each other can be more
Distinguish well the parameter of carbonate rock bitumen reservoir, i.e. the first sensitive parameter and the second sensitive parameter.Described first sensitive parameter
It is to be obtained by contrast display is carried out using cros splot technique to described test data with the second sensitive parameter.
Further, described test data includes：Reservoir properties, in length and breadth ripple time difference value, resistivity and nuclear magnetic resonance, NMR saturation
T2 composes.
Further, before and after described rock core Colophonium dissolving, contrast test includes：Core sample prepares, Colophonium dissolving is front surveys
Test after examination, Colophonium dissolving test and Colophonium dissolving.
Further, the core sample during described core sample prepares is some rock cores by Colophonium filling.
Further, before described Colophonium dissolves, test is tested after dissolving with described Colophonium and is all included：Measurement rock core helium hole
Porosity and air permeability；Make rock core 100% salt water saturation；And measure the time difference value of ripple in length and breadth, resistivity and the nuclear-magnetism of rock core
Resonance saturation T2 spectrum.
Further, described Colophonium dissolving test to soak rock core using METHYLPYRROLIDONE mixed organic solvents
Sample.
Further, described first sensitive parameter is resistivity, and the second sensitive parameter value is compressional wave time difference.
The beneficial effect of technical scheme provided in an embodiment of the present invention：
By proposing a kind of carbonate rock bitumen reservoir Logging Identification Method, well logging obtains the many of carbonate reservoir to be measured
Organize the first sensitive parameter value and the second sensitive parameter value, substitute in carbonate rock bitumen reservoir identification plate, according to carbonic acid to be measured
First sensitive parameter value of multigroup reservoir of rock salt and the second sensitive parameter identify the plan in plate with carbonate rock bitumen reservoir
Close marginal position relationship, obtain the recognition result of carbonate rock bitumen reservoir, reach quick identification carbonate rock Colophonium storage
The purpose of layer, and then improve the well logging test coincidence rate of carbonate rock bitumen reservoir.
Brief description
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, will make to required in embodiment description below
Accompanying drawing be briefly described it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is a kind of carbonate rock bitumen reservoir Logging Identification Method thinking flow chart of one embodiment of the invention；
Fig. 2 is a kind of flow chart of steps of carbonate rock bitumen reservoir Logging Identification Method of one embodiment of the invention；
Fig. 3 be one embodiment of the invention rock core Colophonium dissolving before and after compressional wave time difference comparison diagram；
Fig. 4 be one embodiment of the invention rock core Colophonium dissolving before and after resistivity contrasts figure；
Fig. 5 be one embodiment of the invention the dissolving of rock core Colophonium before and after compressional wave time difference and resistivity corresponding relation figure；
Fig. 6 is the bitumen reservoir identification plate of one embodiment of the invention.
Specific embodiment
For making technical scheme and advantage clearer, below in conjunction with accompanying drawing embodiment of the present invention is made into
One step ground describes in detail.
The main inventive concept of the present invention is to provide a kind of carbonate rock bitumen reservoir Logging Identification Method, as Fig. 1 institute
Show, the method includes：
Step 101：Well logging obtains multigroup first sensitive parameter value and the second sensitive parameter value of carbonate rock reservoir to be measured；
Step 102：By multigroup first sensitive parameter value of the carbonate reservoir to be measured recording and the second sensitive parameter value
Substitute in carbonate rock bitumen reservoir identification plate, carbonate rock bitumen reservoir identifies in the abscissa and vertical coordinate of plate
Individual is the first sensitive parameter value, and another is the second sensitive parameter value, and carbonate rock bitumen reservoir identification plate includes bituminous
Reservoir and without the fitted dividing curve between bitumen reservoir；
Step 103：Multigroup first sensitive parameter value according to carbonate reservoir to be measured and the second sensitive parameter value and plan
Close marginal position relationship, obtain the recognition result of carbonate rock bitumen reservoir.
In order to more clearly describe the carbonate rock bitumen reservoir identification plate being related in the present invention, carbonate rock Colophonium stores up
The method for building up of layer identification plate includes：
The multigroup first sensitive ginseng is obtained respectively from bituminous reservoir with the Oil Field well-log information without bitumen reservoir
Numerical value and the second sensitive parameter value, form multigroup material point, and matching obtain material point and the storage of not bituminous of bituminous reservoir
Fitted dividing curve between the material point of layer, forms carbonate rock bitumen reservoir identification plate.
In order to select the first sensitive parameter and the second sensitive parameter, set up it in carbonate rock bitumen reservoir identification plate
Before, may also include：Carry out contrast test before and after rock core Colophonium dissolving, finding out two from the test data obtaining, be combined with each other can
Preferably to distinguish the parameter of carbonate rock bitumen reservoir, i.e. the first sensitive parameter and the second sensitive parameter.
Find, in carbonate rock bitumen reservoir, the first sensitive parameter is preferably resistivity, the second sensitive parameter by practice
It is preferably compressional wave time difference.
Based on foregoing invention design, one embodiment of the invention is with China Sichuan Basin Mo Xi area Temple of the Dragon King group carbonate rock
As a example reservoir, the present invention is described in further detail, concrete steps include：
Step 201：Choose asphalt solution
Using different organic solvents and organic solvent combination, selected organic solvent mainly includes：Normal hexane, dichloro
Methane, chloroform, toluene, benzene, acetone, Carbon bisulfide, N.N- dimethylformamide, METHYLPYRROLIDONE and mixing
Solvent etc., in order to determine the solubility property to Colophonium for the different organic solvents, obtains optimal asphalt solution, realizes molten to greatest extent
Solution Colophonium.
In specific implementation process, from the similar asphalt sample of 9 pieces of Oil Fields, dry use respectively after weighing different organic molten
Agent is soaked, and soak time 8～10 days makes have different degrees of Colophonium to dissolve in every piece of core sample, so to solute and
Remaining sample is dried and is weighed, and calculates the dissolution rate (rock core dissolution organic matter weight/rock core weight) to Colophonium for the different organic solvents.
Different organic solvents are carried out with the calculating of Colophonium dissolution rate, concrete outcome as shown in table 1 it can be deduced that N- methyl-
To Colophonium solute effect preferably, Colophonium dissolving test adopts METHYLPYRROLIDONE to mix to 2-Pyrrolidone mixed organic solvents
Close organic solvent to soak core sample.
The dissolution rate to Colophonium for table 1 different organic solvents
Step 202：Contrast test before and after the dissolving of rock core Colophonium
(1) core sample prepares：Choose more than the 10 pieces representative, rock cores of Colophonium filling, boring sample, and make
Standard test plunger sample, diameter 2.5cm, length 3-5cm, two ends polish, dry weigh after standby.
(2) experiment before Colophonium dissolving：1. measurement rock core helium porosity and air permeability；2. in 5Mpa pressure condition
Under, abundant saturation is carried out with 80000ppmNaCl solution to rock sample, saturation time 5～6 days is so that rock sample reaches 100% saline
Saturation；3. 100% saturated brine rock core is carried out with compressional wave, shear wave slowness measurement, resistivity and nuclear magnetic resonance, NMR saturation T2 spectrometry,
Obtain rock core ripple time difference value, resistivity value and nuclear magnetic resonance, NMR saturation T2 spectrum in length and breadth.
(3) Colophonium dissolution experiment：Soak core sample using METHYLPYRROLIDONE mixed organic solvents, when invading bubble
Between be 30 days, so that the Colophonium of filling in rock core is dissolved to greatest extent.
(4) test after Colophonium dissolving：1. rock core helium porosity and air permeability after the dissolving of measurement Colophonium；2. in 5Mpa
Under pressure condition, abundant saturation is carried out with 80000ppmNaCl solution to rock sample, saturation time 5～6 days is so that rock sample reaches
100% salt water saturation；3. 100% saturated brine rock core is carried out with compressional wave, shear wave slowness measurement, resistivity and nuclear magnetic resonance, NMR saturation
T2 spectrometry, obtains rock core ripple time difference value, resistivity value and nuclear magnetic resonance, NMR saturation T2 spectrum in length and breadth after Colophonium dissolving.
Step 203：Extract sensitive parameter
Using Microsoft Office Excel software, using cros splot technique to test data, including：Colophonium dissolves
Porosity, permeability, compressional wave time difference, shear wave slowness, resistivity value and nuclear-magnetism T2 spectrum, carry out contrast display, find out two in front and back
It is combined with each other the parameter that can preferably distinguish carbonate rock bitumen reservoir, i.e. the first sensitive parameter and the second sensitive parameter,
Determine that the first sensitive parameter is resistivity eventually, the second sensitive parameter value is compressional wave time difference；
Specifically, compressional wave time difference contrast situation before and after the dissolving of rock core Colophonium, as shown in figure 3, wherein abscissa represents rock core
Sample number, vertical coordinate represents compressional wave time difference value, and abscissa has carried out interval division according to sample number, different in the grid after division
The cylindricality of color represents compressional wave time difference value before and after corresponding core sample Colophonium dissolving；
Resistivity contrasts' situation before and after the dissolving of rock core Colophonium, as shown in figure 4, wherein abscissa represents core sample Article Number, indulges
Coordinate representation resistivity value, abscissa has carried out interval division according to sample number, the cylindricality of different colours in the grid after division
Represent resistivity value before and after corresponding core sample Colophonium dissolving；
Compressional wave time difference and resistivity corresponding relation situation before and after the dissolving of rock core Colophonium, as shown in figure 5, the distinct symbols of in figure
Point represents corresponding compressional wave time difference and resistivity value before and after the dissolving of rock core Colophonium.
Step 204：Set up bitumen reservoir identification plate
In specific implementation process, at least choose one section and do not contain bitumen reservoir Oil Field well-log information rich in Colophonium and one section
Middle obtain multigroup resistivity and the value of compressional wave time difference respectively, form multigroup material point, and matching obtain the money of bituminous reservoir
Fitted dividing curve between shots and the material point not containing bitumen reservoir, forms carbonate rock bitumen reservoir identification plate, such as Fig. 6
Shown, the data point of two kinds of distinct symbols of in figure represents bituminous reservoir and corresponding with resistivity without bitumen reservoir compressional wave time difference
Value, fits a curve between two kinds of distinct symbols data points and is identification bituminous reservoir and the boundary without bitumen reservoir
Line, fits demarcation line equation as follows：
Rta=5689 × Ac-1.96
Rta is compressional wave time difference inverse resistivity；Ac is compressional wave time difference value, us/ft.
Step 205：Determine bitumen reservoir
This step can be realized using computer, inputs Oil Field compressional wave time difference Ac measured value, substitutes into matching boundary
In line equation, inverse resistivity value Rta.When Oil Field resistivity Rt measured value be more than inverse value Rta when it may be determined that be containing
Bitumen reservoir；When Oil Field resistivity Rt measured value is less than inverse value Rta it may be determined that not being bituminous reservoir.Certainly
Can also be determined by inputting Oil Field resistivity Rt measured value.It is exactly substantially that basis records the first sensitive parameter
Value and the second sensitive parameter value and the position relationship of fitted dividing curve, obtain the recognition result of carbonate rock bitumen reservoir.In order to
Result accurately, is excluded the error of small probability, is needed with multigroup Oil Field compressional wave time difference Ac measured value and Oil Field resistivity
Rt measured value is tested, and is defined by the result of most of measured values.
The present embodiment preferably determines optimal asphalt solution by asphalt solution, and contrast before and after carrying out rock core Colophonium dissolving is surveyed
Examination, extracts sensitive parameter, sets up carbonate rock bitumen reservoir identification plate, by multigroup sensitive parameter of carbonate reservoir to be measured
Value substitutes in carbonate rock bitumen reservoir identification plate, by bituminous reservoir and without the fitted dividing curve between bitumen reservoir
Position relationship, reach the quick purpose identifying bitumen reservoir, and then improve the well logging test of carbonate rock bitumen reservoir and meet
Rate.
The above is for only for ease of those skilled in the art and understands technical scheme, not in order to limit
The present invention.All any modification, equivalent substitution and improvement within the spirit and principles in the present invention, made etc., should be included in this
Within the protection domain of invention.
Claims (10)
1. a kind of carbonate rock bitumen reservoir Logging Identification Method is it is characterised in that methods described includes：
Well logging obtains multigroup first sensitive parameter value and the second sensitive parameter value of carbonate reservoir to be measured；
Multigroup first sensitive parameter value of the carbonate reservoir described to be measured recording and the second sensitive parameter value are substituted into carbonic acid
In rock salt bitumen reservoir identification plate, described carbonate rock bitumen reservoir identifies that one of abscissa and vertical coordinate of plate are
First sensitive parameter, another is the second sensitive parameter, and described carbonate rock bitumen reservoir identification plate includes bituminous reservoir
And without the fitted dividing curve between bitumen reservoir；
Multigroup first sensitive parameter value according to described carbonate reservoir to be measured and the second sensitive parameter value are divided with described matching
The position relationship in boundary line, obtains the recognition result of carbonate rock bitumen reservoir.
2. method according to claim 1 is it is characterised in that described carbonate rock bitumen reservoir identifies the foundation side of plate
Formula includes：
Obtain multigroup first sensitive parameter value respectively from bituminous reservoir with the Oil Field well-log information without bitumen reservoir
With the second sensitive parameter value, form multigroup material point, and matching obtains the material point of bituminous reservoir and without bitumen reservoir
Fitted dividing curve between material point, forms described carbonate rock bitumen reservoir and identifies plate.
3. method according to claim 2 is it is characterised in that it is set up by described carbonate rock bitumen reservoir identification plate
Before, also include：
Carry out contrast test before and after rock core Colophonium dissolving, finding out two from the test data obtaining, be combined with each other can be preferably
The parameter of difference carbonate rock bitumen reservoir, i.e. the first sensitive parameter and the second sensitive parameter.
4. method according to claim 3 is it is characterised in that described first sensitive parameter and the second sensitive parameter are to pass through
Using cros splot technique, described test data is carried out with contrast display to obtain.
5. method according to claim 3 is it is characterised in that described test data includes：Reservoir properties, vertical shear wave slowness
Value, resistivity and nuclear magnetic resonance, NMR saturation T2 spectrum.
6. method according to claim 3 it is characterised in that described rock core Colophonium dissolving before and after contrast test include：Rock
Test after test, Colophonium dissolving test and Colophonium dissolving before heart preparation of samples, Colophonium dissolving.
7. method according to claim 6 it is characterised in that described core sample prepare in core sample be some by
The rock core of Colophonium filling.
8. method according to claim 6 is it is characterised in that survey after test and the dissolving of described Colophonium before the dissolving of described Colophonium
Examination all includes：Measurement rock core helium porosity and air permeability；Make rock core 100% salt water saturation；And measure the vertical of rock core
Shear wave slowness value, resistivity and nuclear magnetic resonance, NMR saturation T2 spectrum.
9. method according to claim 6 is it is characterised in that described Colophonium dissolving test adopts N- methyl -2- pyrrolidine
Ketone mixed organic solvents are soaking core sample.
10. the method according to claim 1-9 any of which item is it is characterised in that described first sensitive parameter is resistance
Rate, the second sensitive parameter value is compressional wave time difference.
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| CN113495131A (en) * | 2020-03-20 | 2021-10-12 | 中国石油天然气股份有限公司 | Method for judging underground water in stratum |
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