CN105134190A - Gas logging oil layer interpreting method based on oil layer quantitative recognition layout - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 39
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 36
- 239000004215 Carbon black (E152) Substances 0.000 claims abstract description 34
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims description 30
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 14
- NNPPMTNAJDCUHE-UHFFFAOYSA-N isobutane Chemical compound CC(C)C NNPPMTNAJDCUHE-UHFFFAOYSA-N 0.000 claims description 12
- IJDNQMDRQITEOD-UHFFFAOYSA-N sec-butylidene Natural products CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims description 11
- 239000004575 stone Substances 0.000 claims description 9
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 230000008859 change Effects 0.000 claims description 7
- 238000013461 design Methods 0.000 claims description 7
- 241000209094 Oryza Species 0.000 claims description 6
- 235000007164 Oryza sativa Nutrition 0.000 claims description 6
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims description 6
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000001282 iso-butane Substances 0.000 claims description 6
- 235000013847 iso-butane Nutrition 0.000 claims description 6
- QWTDNUCVQCZILF-UHFFFAOYSA-N isopentane Chemical compound CCC(C)C QWTDNUCVQCZILF-UHFFFAOYSA-N 0.000 claims description 6
- 235000009566 rice Nutrition 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims description 4
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 claims description 3
- AFABGHUZZDYHJO-UHFFFAOYSA-N dimethyl butane Natural products CCCC(C)C AFABGHUZZDYHJO-UHFFFAOYSA-N 0.000 claims description 3
- 239000001294 propane Substances 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000012937 correction Methods 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 230000029052 metamorphosis Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 8
- 238000007781 pre-processing Methods 0.000 abstract 2
- 238000009795 derivation Methods 0.000 abstract 1
- 238000005755 formation reaction Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
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- 238000002203 pretreatment Methods 0.000 description 2
- XQCFHQBGMWUEMY-ZPUQHVIOSA-N Nitrovin Chemical group C=1C=C([N+]([O-])=O)OC=1\C=C\C(=NNC(=N)N)\C=C\C1=CC=C([N+]([O-])=O)O1 XQCFHQBGMWUEMY-ZPUQHVIOSA-N 0.000 description 1
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
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Abstract
The invention discloses a gas logging oil layer interpreting method based on an oil layer quantitative recognition layout. The method comprises the step of collecting parameters, the step of preprocessing the parameters, the step of calculating the parameters, the step of establishing the oil layer quantitative recognition layout and the step of calculating parameters of a target layer. In the step of collecting the parameters, gas logging of the parameters is carried out; in the step of preprocessing the parameters, the parameters are selected; in the step of calculating the parameters, derivation parameters are selected; in the step of establishing the oil layer quantitative recognition layout, graphic bars are drawn through the heavy hydrocarbon parameters. According to the gas logging oil layer interpreting method, an oil layer in a reservoir stratum is quantitatively recognized through the gas logging technology, the oil layer and a non-oil layer are accurately evaluated in real time, and basic data are provided for selecting a logging method, making a testing measure and selecting a testing scheme in subsequent shaft work in time.
Description
Technical field
The present invention relates to a kind of gas detection logging Reservoir interpretation method based on oil reservoir quantitative judge plate, particularly relate to the gas detection logging Reservoir interpretation method based on oil reservoir quantitative judge plate in oil exploration industry wellbore technologies field.
Background technology
The gas logging technology of prior art is an important technical of petroleum exploration and development, the change of gas total hydrocarbon, component is the important evidence finding oil/gas show, judge oil-gas-water layer, and the parameter that gas logging technology is explained, evaluation oil-gas Layer uses mainly utilizes C
1-nC
5these 7 kinds of gas components, domestic and international means of interpretation adopts Pixler Chart method mostly, Triangle Chart method, lighter hydrocarbons (3H) ratio method etc., existing means of interpretation take methane content as core, research work is launched by the ratio of methane content and other gas component, and the influenced many factors of methane content measured value, there is larger difference in methane content and its gas component content order of magnitude simultaneously, cause explaining that conclusion is objective not, comprehensively, as pik Si Lefa in practical application, Triangle Chart method or lighter hydrocarbons (3H) ratio method are explained and mostly are non-payzone or gas-bearing formation.
Summary of the invention
Technical problem to be solved by this invention is, the invention provides a kind of gas detection logging Reservoir interpretation method based on oil reservoir quantitative judge plate, the heavy hydrocarbon parameter of gas detection logging is utilized separately to judge oil reservoir in reservoir, evaluate oil reservoir in real time, exactly, in time for the formulation of selecting, testing measure of logging method in follow-up wellbore operations and the selection of testing scheme provide basic data.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
As a kind of gas detection logging Reservoir interpretation method based on oil reservoir quantitative judge plate, comprise parameter acquisition step, parameter pre-treatment step, parameter calculation procedure, the step setting up oil reservoir quantitative judge plate step, target zone carried out to the step of parameter calculating and according to standard plate, target zone is evaluated, parameter acquisition step gas detection logging parameter, comprises heavy hydrocarbon component; Parameter pre-treatment step chooses the parameter that can reflect fluid properties change in stratum; Parameter calculation procedure chooses the heavy hydrocarbon relative amount that directly can reflect oil-layer characteristic, positive Isomer ratio relative amount two derivative parameters; Set up oil reservoir quantitative judge plate step according to known formation testing conclusion, with heavy hydrocarbon parameter graphing hurdle.
In parameter acquisition step, gas detection logging acquisition parameter comprises total hydrocarbon and each hydrocarbon component methane C
1, ethane C
2, propane C
3, iso-butane iC
4, normal butane nC
4, isopentane iC
5, pentane nC
5.
In addition, in parameter calculation procedure, heavy hydrocarbon relative amount HR is oil/gas show section nC4 value and adjacent segment mud stone nC
4the ratio of value (mud stone background value), heavy hydrocarbon relative amount design formulas is, HR=nC
4(display segment)/nC
4(mud stone section).
In parameter calculation procedure, positive Isomer ratio relative amount AR is the iC of oil/gas show section n rice depth point
4/ nC
4value and (n-1) rice depth point iC
4/ nC
4the ratio of value, positive Isomer ratio relative amount design formulas is, AR=iC
4/ nC
4(depth point n)/(iC
4/ nC
4(depth point n-1)).
In addition, set up in oil reservoir quantitative judge plate step, select heavy hydrocarbon relative amount and positive Isomer ratio relative amount two derivative parameters, figure is become in a graphical bar, according to variation tendency on plate of drilling well gas detection logging data point and distribution, with reference to lithology, the oiliness situation of geological logging, according to known formation testing conclusion, comprehensive enough statistics set up oil reservoir quantitative judge plate.
In addition, carry out parameter calculation procedure at target zone and comprise: reservoir thickness calculate: according to landwaste percentage change, bore time etc. parameter, the thickness of reservoir is divided; According to reservoir gas parameter determination reservoir effective thickness, playing depth of stratum corresponding to peak with abnormal show layer total gas curve is initial well depth H1, single display summit or continuously high level reduction flex point place accordingly layer depth are end well depth H2, reservoir effective thickness H effectively for terminating the difference of well depth and initial well depth, namely H effectively=H2-H1; Reservoir heavy hydrocarbon relative amount, positive Isomer ratio relative amount calculate: the target zone parameter from database after extraction process, check and correction, calculates two derivative parameters respectively.
In addition, carry out in evaluation procedure according to criteria for interpretation plate to target zone, the heavy hydrocarbon relative amount calculated and positive Isomer ratio relative amount are depicted as curve according to master scale, the metamorphosis of reference standard plate, parameter area, complete the judgement to target zone.
The invention has the beneficial effects as follows:
The present invention is based on the gas detection logging Reservoir interpretation method of oil reservoir quantitative judge plate, gas logging technology is utilized to gather gas parameter, according to the reservoir characteristics that each gas component reflects, select the parameter to oil reservoir sensitivity, heavy hydrocarbon relative amount and positive Isomer ratio relative amount two derivative calculating parameters are proposed, according to two parameters well logging longitudinally on variation tendency and parameter area, in conjunction with the lithology of geological logging, oiliness (fluorescence) situation carries out quantitative judge to oil reservoir, oil reservoir quantitative judge plate is utilized to make an explanation to reservoir, have in real time, intuitively, high accuracy for examination.
Accompanying drawing explanation
Fig. 1 is explained flowchart in the gas detection logging Reservoir interpretation method that the present invention is based on oil reservoir quantitative judge plate.
Fig. 2 is oil reservoir quantitative judge figure in the gas detection logging Reservoir interpretation method that the present invention is based on oil reservoir quantitative judge plate.
Fig. 3 is Reservoir interpretation application example in the gas detection logging Reservoir interpretation method that the present invention is based on oil reservoir quantitative judge plate
Fig. 4 is non-oil reservoir explanation application instance graph in the gas detection logging Reservoir interpretation method that the present invention is based on oil reservoir quantitative judge plate.
Number in the figure illustrates:
P1: parameter acquisition P2: parameter pretreatment
P3: parameter calculates P4: set up oil reservoir quantitative judge plate
P5: parameter is carried out to target zone and calculates P6: according to standard plate, target zone is evaluated
P11: gas detection logging P12: compound logging
P13: geological logging P21: integrated decryption storehouse
P31: heavy hydrocarbon relative amount P41: set up oil reservoir quantitative judge plate
P42: lithology, the oiliness (fluorescence) of statistics geological logging
P51: divide reservoir, parameter calculates
P61: in conjunction with lithology, the oiliness (fluorescence) of geological logging
P62: draw explanation conclusion
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the gas detection logging Reservoir interpretation method that the present invention is based on oil reservoir quantitative judge plate is described in further detail:
As shown in Figure 1, the present invention chooses the heavy hydrocarbon parameter with oil reservoir in gas measuring logging data with close response relation, and propose oil reservoir quantitative judge plate, heavy hydrocarbon parameter comprises normal butane nC
4with iso-butane iC
4, further abundant, perfect fluid means of interpretation, significantly improves Reservoir interpretation accuracy rate.Achieve good result in actual applications.
Concrete methods of realizing of the present invention is the gas detection logging Reservoir interpretation method based on oil reservoir quantitative judge plate, and concrete steps are as follows:
1, parameter acquisition:
Gas detection logging parameter acquisition: gas is surveyed parameter acquisition and is suitable for quantitative degasser and carries out that gas is de-to be got, and acquisition parameter is total hydrocarbon (TG) and all kinds of hydrocarbon component methane (C
1), ethane (C
2), propane (C
3), normal butane (nC
4), iso-butane (iC
4), isopentane (nC
5), pentane (iC
5) content.
Compound logging P12 parameter acquisition: comprehensive logging parameters is suitable for the data that comprehensive logging instrument collects, ROP (min/m) and calculate the parameter such as depth H (m) of reservoir thickness when comprising the brill of reflection reservoir pore space.
The above, each logging parameters collection, record step-length is 1m/l point.
Geological logging parameter acquisition: extract parameter such as reflection reservoir lithology and oiliness etc. by geological logging, oiliness fluorescence area (%) represents.
2, parameter pretreatment:
The gas detection logging parameter quality gathered is analyzed, causes gas parameter extremely identified and eliminate to due to drilling fluid contaminated product, non-formation factor such as make up a joint gas, leakage etc., make Parameters variation can reflect the change of fluid properties in stratum.
To the numerical value between 0-1, assignment is that 1ppm carries out standardization normalization.
Obtained logging parameters is carried out preferably, sorts out, integrated decryption storehouse P21.
3, parameter calculates:
The gas component parameter that gas logging technology detects is more, chooses the gas parameter to formation reaction sensitivity, calculates two derivative parameters that can reflect reservoir characteristics very well:
Heavy hydrocarbon relative amount (HR) calculates: generally, normal butane (nC
4) absolute content be shown as high level at oil layer section, in mud stone section and non-oil layer section, then present the normal butane (nC of low content
4), this value is background.Although the order of magnitude of this parameter value that every mouthful of drilling well obtains exists certain difference, this parameter value has good corresponding relation from the ratio of background gas between different well.So select normal butane (nC
4) with the ratio of background gas as the discrimination standard reflecting reservoir oil reservoir, i.e. heavy hydrocarbon relative amount (HR).
Heavy hydrocarbon relative amount design formulas is, HR=nC
4(display segment)/nC
4(mud stone section).
Positive Isomer ratio relative amount (AR) calculates: positive Isomer ratio is comparatively stable in oil layer section, and in irregular distribution in mud stone section and non-oil layer section.The form of the degree of stability Digital size of positive Isomer ratio in Reservoir Section is expressed, so select the iC with oil/gas show section n rice depth point
4/ nC
4value and (n-1) rice depth point iC
4/ nC
4the ratio of value is as the discrimination standard reflecting reservoir oil reservoir, and namely positive Isomer ratio relative amount (AR) represents.
Positive Isomer ratio relative amount design formulas is, AR=(iC
4/ nC
4(depth point n))/(iC
4/ nC
4(depth point n-1)).
The present invention is caved in Bohai Sea, caving in Qin Nan depression, Yellow River mouth sag and Liaozhong, more than 10 mouthful of well is applied, 40 layers, interpretation and evaluation oil reservoir, and wherein 34 layers and formation testing conclusion are consistent, and coincidence rate is 85%, is worth of widely use.
Fig. 1 is explained flowchart of the present invention.
Fig. 2 is interpretation chart of the present invention and brief description, the situation that this plate provides is all that the figure of oil reservoir under more satisfactory state and non-oil reservoir shows, and wherein non-oil reservoir divides 3 kinds of situations to provide, first pure water layer, it two is oil-containing water layer, and it three is oil-water common-layer.Change with calibration curve the target zone do not conformed to if run into, in needing basis above, specific explanations standard is comprehensively analyzed.
Fig. 3 is the application example of a Reservoir interpretation of the present invention.Analyzing well section is 2129-2152m, fluorescence area 10%, component C
1-nC
5obviously increase relative to base value.Figure road, Fig. 3 rightmost side is the sensitivity curve of oil reservoir quantitative judge, heavy hydrocarbon relative amount (HR) is greater than 4, positive Isomer ratio relative amount (AR) is stabilized near 1, meet the reservoir characteristics in interpretation chart, explanation conclusion is oil reservoir, to the formation testing of 2131-2142m well section, 12.70mmPC day produce oil 343.6m
3.
Fig. 4 is the application example of a non-Reservoir interpretation of the present invention.Analyzing well section is 2298-2306m, fluorescence area 5%, component C
1-nC
5slightly increase relative to base value.Heavy hydrocarbon relative amount (HR) is less than 4, meets the non-reservoir characteristics in interpretation chart, and explain that conclusion is non-oil reservoir, the final result of log interpretation of this well section is oil-containing water layer.
In sum, the present invention, in structure design, use practicality, cost benefit, completes and meets needed for industry development, and the structure disclosed also is unprecedented innovative structure, there is novelty, creativeness, practicality, meet the regulation about novel important document, therefore file an application in accordance with the law.
Claims (7)
1. the gas detection logging Reservoir interpretation method based on oil reservoir quantitative judge plate, it is characterized in that: the described gas detection logging Reservoir interpretation method based on oil reservoir quantitative judge plate comprises parameter acquisition (P1) step, parameter pretreatment (P2) step, parameter calculating (P3) step, sets up oil reservoir quantitative judge plate (P4) step, target zone carried out to the step of parameter calculating (P5) and according to standard plate, target zone evaluated to the step of (P6), parameter acquisition (P1) step gas detection logging (P11) parameter, comprises heavy hydrocarbon component; Parameter pretreatment (P2) step chooses the parameter that can reflect fluid properties change in stratum; Parameter calculates (P3) step and chooses the heavy hydrocarbon relative amount that directly can reflect oil-layer characteristic, positive Isomer ratio relative amount (P32) two derivative parameters; Set up oil reservoir quantitative judge plate (P4) step according to known formation testing conclusion, with heavy hydrocarbon parameter graphing hurdle.
2. as claimed in claim 1 based on the gas detection logging Reservoir interpretation method of oil reservoir quantitative judge plate, it is characterized in that: in described parameter acquisition (P1) step, gas detection logging (P11) acquisition parameter comprises total hydrocarbon and each hydrocarbon component methane (C
1), ethane (C
2), propane (C
3), iso-butane (iC
4), normal butane (nC
4), isopentane (iC
5), pentane (nC
5).
3. as claimed in claim 1 based on the gas detection logging Reservoir interpretation method of oil reservoir quantitative judge plate, it is characterized in that: calculate in (P3) step in described parameter, heavy hydrocarbon relative amount (HR) is oil/gas show section normal butane (nC
4) value and adjacent segment mud stone normal butane (nC
4) ratio of value (mud stone background value), the design formulas of heavy hydrocarbon relative amount (P31) value is, HR=nC
4(display segment)/nC
4(mud stone section).
4. as claimed in claim 1 based on the gas detection logging Reservoir interpretation method of oil reservoir quantitative judge plate, it is characterized in that: calculate in (P3) step in described parameter, positive Isomer ratio relative amount AR is the iso-butane (iC of oil/gas show section n rice depth point
4)/normal butane (nC
4) value and (n-1) rice depth point iso-butane (iC
4)/normal butane (nC
4) ratio of value, positive Isomer ratio relative amount design formulas is, AR=iC
4/ nC
4(depth point n)/(iC
4/ nC
4(depth point n-1)).
5. as claimed in claim 1 based on the gas detection logging Reservoir interpretation method of oil reservoir quantitative judge plate, it is characterized in that: describedly set up in oil reservoir quantitative judge plate (P4) step, select heavy hydrocarbon relative amount and positive Isomer ratio relative amount two derivative parameters, figure is become in a graphical bar, according to variation tendency on plate of drilling well gas detection logging data point and distribution, with reference to lithology, the oiliness situation of geological logging (P13), according to known formation testing conclusion, comprehensive enough statistics set up oil reservoir quantitative judge plate (P41).
6. as claimed in claim 1 based on the gas detection logging Reservoir interpretation method of oil reservoir quantitative judge plate, it is characterized in that: parameter calculating (P5) step is carried out to target zone comprise described,
Reservoir thickness calculates, and is according to the change of landwaste percentage and parameter when boring, divides the thickness of reservoir;
According to reservoir gas parameter determination reservoir effective thickness, playing depth of stratum corresponding to peak with abnormal show layer total gas curve is initial well depth (H1), single display summit or continuously high level reduce flex point place layer depth are for terminating well depth (H2) accordingly, and reservoir effective thickness (H is effective) be the difference (H effective=H2-H1) terminating well depth and initial well depth;
Reservoir heavy hydrocarbon relative amount, positive Isomer ratio relative amount calculate, and are the target zone parameters from database after extraction process, check and correction, calculate two derivative parameters respectively.
7. as claimed in claim 1 based on the gas detection logging Reservoir interpretation method of oil reservoir quantitative judge plate, it is characterized in that: evaluate in (P6) step according to criteria for interpretation plate to target zone, the heavy hydrocarbon relative amount calculated and positive Isomer ratio relative amount are depicted as curve according to master scale, the metamorphosis of reference standard plate, parameter area, complete the judgement to target zone, draw and explain conclusion (P62).
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