CN106447511A - Heavy oil-based quantitative identification chart interpretation method with gas logging - Google Patents
Heavy oil-based quantitative identification chart interpretation method with gas logging Download PDFInfo
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- 238000001514 detection method Methods 0.000 claims description 30
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 18
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- 238000002203 pretreatment Methods 0.000 claims description 3
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- 241000208340 Araliaceae Species 0.000 claims description 2
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims description 2
- 235000003140 Panax quinquefolius Nutrition 0.000 claims description 2
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Abstract
The invention discloses a heavy oil-based quantitative identification chart interpretation method with gas logging. An oil-water layer is quantitatively identified by comprehensively applying gas logging parameters, the concept that the oil-water layer is identified by use of a concentric circle chart of parameters of a methane-ethane logarithmic ratio and a light-heavy hydrocarbon logarithmic ratio is provided for the first time. The method is characterized by comprising the steps of: a step of parameter acquisition, selecting various parameters including a heavy hydrocarbon component in gas logging; a step of parameter preprocessing, carrying out parameter evaluation by use of the ratio of the sum of hydrocarbon components to total hydrocarbon, and excluding an oil layer with the thickness of less than 1m in consideration of the limitation of the gas logging technology; a step of parameter calculation, calculating two derivative parameters of the methane-ethane logarithmic ratio and the light-heavy hydrocarbon logarithmic ratio; and a step of establishment of an oil-layer quantitative identification chart, respectively drawing a graphic bar by use of gas logging hydrocarbon component derivative parameters of the methane-ethane logarithmic ratio and the light-heavy hydrocarbon logarithmic ratio according to a drilled measured result. According to the method, the oil-water layer in a reservoir stratum is qualitatively and semi-quantitatively identified by use of a comprehensive logging technology, the first-hand logging information can be fully discovered, and the oil-water layer can be evaluated rapidly and reliably.
Description
Technical field
Patent of the present invention belongs to oil exploration industry wellbore technologies field, surveys record particularly to a kind of gas based on mink cell focus
Well quantitative judge chart interpretation method.
Background technology
The log data that drilling well obtains in the geological prospecting of petroleum gas is that identification of hydrocarbon layer is the most directly perceived, most important
The firsthand information, is also the basic data of current oil, gas and water layer comprehensive analysis and evaluation.Wherein gas detection logging is by brill
In well liquid, the composition of natural gas and content measure analysis, judge formation fluid property according to this, find oil-gas Layer in time,
It is one of topmost mud logging techniques means.Gas measuring logging data, for other log datas, has following three aspects
Advantage：(1) universality：Every mouthful of drilling well has gas measuring logging data；(2) seriality：Start to finishing drilling depth from 500m, each
There is detailed data individual integer depth point, can form continuous curve；(3) ageing：There is number with drill footage in real time
According to correlation analysiss result can provide certain help and reference to the next step such as wellbore construction measure such as electrical measurement, formation testing, therefore such as
What surveys data using gas and gas is surveyed the dependency between data ratio and carried out oil-gas possibility explanation, and becoming gas measuring logging data should
Primary study content with aspect.At present, the means of interpretation that we commonly use has Pixler Chart method, triange method etc..
Existing mud logging techniques are all based on itself limited parameter and oil-gas Layer are qualitatively evaluated, and multiple well loggings are not joined
Number information carry out deep excavate and comprehensively utilize to evaluate reservoir fluid property, be not directed to yet certain research area set up quantitative
Oil-water layer identification standard, leads to explain that conclusion is more unilateral and more difficult in the evaluation of the follow-up well location oil-water-layer in same research area
Effectively contrasted.
Content of the invention
In order to solve existing issue, the present invention provides a kind of gas detection logging quantitative judge chart interpretation side based on mink cell focus
Method, in solution prior art, mud logging techniques evaluation is more unilateral, and in the evaluation of the follow-up well location oil-water-layer in same research area relatively
The problem that difficulty is effectively contrasted.
The technical scheme is that：Integrated application gas detection logging parameter " quantitative " of the present invention sentences knowledge oil-water-layer, for
In 20 DEG C of condition lower densities of temperature between 0.920g/cm3To 1.000g/cm3Between mink cell focus, first propose utilize the first and second alkane
" concentric circular " plate of log ratio and weight hydrocarbon log ratio parameter identifies its oil-water layer, and true according to Logging curve feature
Stand oil, water layer section, concrete steps include：
(1) parameter acquisition step, includes heavy hydrocarbon component in interior parameters from gas detection logging；
(2) parameter pre-treatment step, the ratio using hydrocarbon component sums different in gas detection logging and total hydrocarbon (TG) is evaluated,
As unreliable in this ratio parameter of the explanation more than 1, this abnormity point is excluded, is in addition considered during parameter processing
To the limitation of gas detection logging technology itself, may be affected by upper and lower stratum for during oil sheet gas detection logging,
The reservoir parameter therefore thickness being less than 1m is screened；
(3) parameter calculation procedure, calculates the first and second alkane log ratio and this two derivative parameters of weight hydrocarbon log ratio；
(4) set up oil reservoir quantitative judge plate step, solution result is surveyed according to drilling well, ginseng is derived with gas logging hydrocarbon component
Several first and second alkane log ratio and weight hydrocarbon log ratio graphing hurdle respectively.
In described step (1) parameter acquisition step, gas detection logging acquisition parameter includes gas detection logging acquisition parameter and includes entirely
Hydrocarbon and each hydrocarbon component methane C1, ethane C2, propane C3, iso-butane iC4, normal butane nC4, isopentane iC5, pentane nC5.
In addition, in described step (3) parameter calculation procedure, the first and second alkane log ratio are ten times of methane second of well logging well section
The ratio of alkane group score value logarithm, i.e. the first and second alkane log ratio=Lg10C1/Lg10C2；Weight hydrocarbon log ratio is well logging well section
The ratio of ten times of methane component logarithm value and the logarithm value of ten times of heavy hydrocarbon component sums, and weight hydrocarbon log ratio=Lg10C1/
Lg10(C2+C3+C4+C5).
Additionally, described step (4) is set up in oil reservoir quantitative judge plate step, select the first and second alkane log ratio and weight hydrocarbon
Log ratio becomes figure respectively in a figure hurdle, according to variation tendency on plate for the drilling-log data point and distribution model
Enclose, with reference to lithology and the oil-containing implementations of geological logging, according to surveying solution result, it is quantitative that oil reservoir set up by comprehensive statistical data enough
Identification plate.
In addition, when setting up individual well geochemical logging and fluorologging parameter plate, target zone enters line parameter calculation procedure bag
Include：Logging parameters corresponding well depth correction：The initial well depth of the corresponding interval of logging parameters is H1, and end well depth is H2, and reservoir is corresponding
The corresponding well depth of logging parameters is both meansigma methodss；Reservoir derives the calculating of logging parameters：From data base extraction process, correction after
Purpose layer parameter, calculate respectively corresponding gas detection logging derive parameter.Parameter value after calculating is projected to complete in above-mentioned plate
The judgement of target zone in pairs.
By the gas detection logging quantitative judge chart interpretation method based on mink cell focus for the present invention, adopted using gas logging technology
Collection gas parameter, the different reservoir characteristics that comprehensive corresponding gas logging hydrocarbon component is reflected, select to oil reservoir indicative significance relatively
Strong parameter, proposes the first and second alkane log ratio and two derivative calculating parameters of weight hydrocarbon log ratio.According to during well logging two
Distribution on plate for the individual parameter and size characteristic, right in conjunction with the variation of lithological of sieve residue log, oiliness (fluorescence display)
Oil reservoir is effectively identified.
The invention has the beneficial effects as follows：The present invention comprehensively utilizes the every hydrocarbon component parameter in gas measuring logging data, according to
The different weight factors giving differentiation that different hydrocarbon components respond in oil gas, and be projected in logarithm plate it is proposed that
Mink cell focus oil reservoir quantitative judge plate.Take full advantage of the parameters of gas detection logging, proposition the first and second alkane logarithm ratio of novelty
" method of altering course with a concentric circle " of value and weight hydrocarbon log ratio parameter carries out oil-water-layer explanation, rapidly and efficiently can carry out reservoir fluid knowledge
Not, Reservoir interpretation accuracy rate is greatly improved.Have a good application prospect in actual applications.Using Comprehensive mud logging technology pair
In reservoir, oil-water-layer carries out quantitative judge, has the advantages that quick, efficient, identification degree is high, can fully excavate first-hand
Log data simultaneously quickly and reliably evaluates oil-water-layer.
Brief description
Fig. 1 is explained flowchart of the present invention；
Fig. 2 is oil reservoir of the present invention " concentric circular " quantitative judge plate；
Fig. 3 is plate application example of the present invention.
Specific embodiment
Concrete methods of realizing of the present invention is the gas detection logging quantitative judge chart interpretation method based on mink cell focus, concrete steps
As follows：
1st, parameter acquisition：
Gas detection logging parameter acquisition：Gas survey parameter acquisition be suitable for quantitative degasser carry out gas take off take, acquisition parameter is：Entirely
Hydrocarbon TG (ppm) and all kinds of hydrocarbon component C1 (ppm), C2 (ppm), C3 (ppm), nC4 (ppm), iC4 (ppm), nC5 (ppm), iC5
(ppm) content.
Comprehensive logging parameters gather：Comprehensive logging parameters are suitable for the data that comprehensive logging instrument collects, including reflection reservoir
The parameter such as the lagged time of ROP (min/m) and calculating logging parameters well depth and Ascending Velocity For Oil ＆ Gas during the brill of lithology.
The above, each logging parameters continuous sampling detection, well logging spacing, from the beginning of geological design prescribed depth, is examined for every meter
Survey once, if necessary (during brill, Gas Logging Value change greatly when) can encrypt.
Geological logging parameter acquisition：Reflection reservoir lithology and oiliness (fluorescence area (%)) etc. are obtained by geological logging
Parameter.
2nd, parameter pretreatment：
Ratio using hydrocarbon component sums different in gas detection logging and total hydrocarbon (TG) is evaluated, and such as this ratio is said more than 1
Bright parameter is unreliable, and this abnormity point is excluded, and in addition considers gas detection logging skill itself during parameter processing
The limitation of art, may be affected by upper and lower stratum for during oil sheet gas detection logging, therefore thickness is less than 1m
Reservoir parameter screened.
Acquired logging parameters are carried out preferably, sort out, integrated explanation data base.
3rd, parameter calculates：
The gas component parameter that gas logging technology detects is more, root in the case of not giving up existing hydrocarbon component parameter
According to the difference to oil bearing formation property indicative significance for the different parameters, give different hydrocarbon components different weight factors respectively, calculate energy
Enough two derivative parameters reflecting reservoir characteristics very well：
Generally, methane is 10 times of dissolubility in water in the dissolubility in oil, and different hydrocarbon gas are in oil
In dissolubility also different, it increases with the increase of the molecular weight of the hydrocarbon gas.Oil reservoir hydrocarbonaceous amount is obvious bigger than water layer, gas survey group
Part is relatively complete, and each component content difference is larger, and water layer hydrocarbonaceous amount is less, and component is not complete, and content difference is less, is not amplifying this
It is difficult to identify that in the case of planting difference that oil reservoir and water layer survey the difference in content in gas, but through amplification each group is divided between
Ratio can distinguish oil-water-layer.So have chosen the first and second alkane log ratio and two groups of ratios of weight hydrocarbon log ratio are used as differentiating
The standard of oil-water-layer.
Computing formula：First and second alkane log ratio=Lg10C1/Lg10C2
Weight hydrocarbon log ratio=Lg10C1/Lg10 (C2+C3+C4+C5)
The present invention is based on about 2500 groups of A area gas survey data points and summarizes, and establishes the identification mark of oil reservoir and water layer
Quasi- plate, and applied in nearly 2000 groups of gas survey data point that the multigroup gas in B area 1000 surveys data and C area and evaluate, utilize
Standard plate identifies the result of oil reservoir and non-oil reservoir compared with result of log interpretation, and wherein B area coincidence rate reaches 80%, C area and meets
Rate reaches 70%, in the case of needing quickly to judge oil-water-layer with brill personnel and make next step decision-making in high cost probing, value
Must promote the use of.
Fig. 1 is the explained flowchart of the present invention.
Fig. 2 is interpretation chart and the brief description of the present invention, and this figure is based on substantial amounts of data point and becomes figure, and in figure water layer point is relatively
For concentrating, it is distributed near initial point, and oil reservoir is relatively decentralized relative to water layer, away from initial point distribution, it is initial point that water layer is distributed in the center of circle,
Radius is in 2.2 circle, and in the range of the concentric circular with initial point as the center of circle with 20 as radius outside pool for the oil-layer distribution.
Fig. 3 is the application example of a Reservoir interpretation of the present invention.The oil density in example Zhong Gai area with set up plate area
Oil density quite, water layer data point concentrates on initial point as the center of circle, with radius be 6 circle in, oil-layer distribution is in pool
Outside the concentric circular with initial point as the center of circle with 36 as radius in the range of, with well logging result compared with coincidence rate reach 80%.
By specific embodiment, the present invention has been done above further describe it should be understood that, here specifically
Description, should not be construed as the restriction to the spirit and scope of the invention, and one of ordinary skilled in the art is reading this explanation
The various modifications after book, above-described embodiment made, broadly fall into the scope that the present invention is protected.
Claims (6)
1. a kind of gas detection logging quantitative judge chart interpretation method based on mink cell focus is it is characterised in that comprise the following steps：
(1) parameter acquisition step, includes heavy hydrocarbon component in interior parameters from gas detection logging；
(2) parameter pre-treatment step；
(3) parameter calculation procedure, calculates the first and second alkane log ratio and this two derivative parameters of weight hydrocarbon log ratio；
(4) set up oil reservoir quantitative judge plate step, according to drilling well result of log interpretation, ginseng is derived with gas logging hydrocarbon component
Several first and second alkane log ratio and weight hydrocarbon log ratio graphing hurdle respectively.
(5) step target zone well section evaluated according to standard plate.
2. the gas detection logging quantitative judge chart interpretation method based on mink cell focus as claimed in claim 1 it is characterised in that：Institute
State in step (1) parameter acquisition step, gas detection logging acquisition parameter include total hydrocarbon and each hydrocarbon component methane C1, ethane C2, third
Alkane C3, iso-butane iC4, normal butane nC4, isopentane iC5, pentane nC5.
3. the gas detection logging quantitative judge chart interpretation method based on mink cell focus as claimed in claim 1 it is characterised in that：Institute
State in step (2) parameter pre-treatment step, evaluated using the ratio that hydrocarbon component sums different in gas detection logging survey full dose with gas,
As unreliable in this ratio parameter of the explanation more than 1, this abnormity point is excluded, is in addition considered during parameter processing
To the limitation of gas detection logging technology itself, may be affected by upper and lower stratum for during oil sheet gas detection logging,
The reservoir parameter therefore thickness being less than 1m is screened.
4. the gas detection logging quantitative judge chart interpretation method based on mink cell focus as claimed in claim 1 it is characterised in that：Institute
State in step (3) parameter calculation procedure, the first and second alkane log ratio are the ratios of ten times of methane ethane component value logarithms of well logging well section
Value, i.e. the first and second alkane log ratio=Lg10C1/Lg10C2；Weight hydrocarbon log ratio is ten times of methane component logarithms of well logging well section
It is worth the ratio with the logarithm value of ten times of heavy hydrocarbon component sums, and weight hydrocarbon log ratio=Lg10C1/Lg10 (C2+C3+C4+C5).
5. the gas detection logging quantitative judge chart interpretation method based on mink cell focus as claimed in claim 1 it is characterised in that：Institute
State step (4) to set up in oil reservoir sxemiquantitative identification plate step, select the first and second alkane log ratio and weight hydrocarbon log ratio respectively
Become figure in a figure hurdle, according to variation tendency on plate for the drilling-log data point and distribution, with reference to geology record
The lithology of well and oil-containing implementations, according to result of log interpretation, oil reservoir sxemiquantitative identification plate set up by comprehensive statistical data enough.
6. the gas detection logging quantitative judge chart interpretation method based on mink cell focus as claimed in claim 1 it is characterised in that：Institute
State step (5) according to criteria for interpretation plate, target zone to be carried out in evaluation procedure, the first and second alkane log ratio calculating and weight
Hydrocarbon log ratio is depicted as curve according to master scale, according to distribution on plate for two parameters during well logging and big
Little feature, is effectively identified to the oil-gas possibility of target zone well section in conjunction with the variation of lithological of sieve residue log, oiliness.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108894778A (en) * | 2018-07-20 | 2018-11-27 | 中国海洋石油集团有限公司 | A method of utilizing gas measuring logging data identification of hydrocarbon laminar flow volume property |
| CN109001355A (en) * | 2018-08-16 | 2018-12-14 | 中海石油（中国）有限公司天津分公司 | Method of discrimination is explained based on the well logging oil gas that hot-vibration sifter gas-chromatography map compares |
| CN109138986A (en) * | 2018-09-06 | 2019-01-04 | 中国石油集团渤海钻探工程有限公司 | Unit volume rock void fraction quantitative interpretation evaluation method |
| CN109403958A (en) * | 2018-08-31 | 2019-03-01 | 中国石油集团川庆钻探工程有限公司 | Utilize the method for the equivalent index identification formation fluid property of gas detection logging power spectrum |
| CN109736792A (en) * | 2019-01-07 | 2019-05-10 | 中国石油集团川庆钻探工程有限公司 | Natural gas reservoirs and its automatic identifying method containing fluid properties |
| CN110704796A (en) * | 2019-10-01 | 2020-01-17 | 长江大学 | Gas-oil ratio quantitative calculation method and device introducing gas logging information |
| CN112696197A (en) * | 2020-12-30 | 2021-04-23 | 中国石油天然气集团有限公司 | Oil field reservoir index curve construction method, system, equipment and storage medium |
| GB2608998A (en) * | 2021-07-15 | 2023-01-25 | Equinor Energy As | Reservoir fluid typing |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108894778A (en) * | 2018-07-20 | 2018-11-27 | 中国海洋石油集团有限公司 | A method of utilizing gas measuring logging data identification of hydrocarbon laminar flow volume property |
| CN109001355A (en) * | 2018-08-16 | 2018-12-14 | 中海石油（中国）有限公司天津分公司 | Method of discrimination is explained based on the well logging oil gas that hot-vibration sifter gas-chromatography map compares |
| CN109403958A (en) * | 2018-08-31 | 2019-03-01 | 中国石油集团川庆钻探工程有限公司 | Utilize the method for the equivalent index identification formation fluid property of gas detection logging power spectrum |
| CN109403958B (en) * | 2018-08-31 | 2021-10-22 | 中国石油集团川庆钻探工程有限公司 | Method for identifying formation fluid properties by using gas logging power spectrum equivalent index |
| CN109138986A (en) * | 2018-09-06 | 2019-01-04 | 中国石油集团渤海钻探工程有限公司 | Unit volume rock void fraction quantitative interpretation evaluation method |
| CN109138986B (en) * | 2018-09-06 | 2022-04-19 | 中国石油集团渤海钻探工程有限公司 | Quantitative interpretation and evaluation method for gas content of rock in unit volume |
| CN109736792A (en) * | 2019-01-07 | 2019-05-10 | 中国石油集团川庆钻探工程有限公司 | Natural gas reservoirs and its automatic identifying method containing fluid properties |
| CN110704796B (en) * | 2019-10-01 | 2023-04-18 | 长江大学 | Gas-oil ratio quantitative calculation method and device introducing gas logging information |
| CN110704796A (en) * | 2019-10-01 | 2020-01-17 | 长江大学 | Gas-oil ratio quantitative calculation method and device introducing gas logging information |
| CN112696197A (en) * | 2020-12-30 | 2021-04-23 | 中国石油天然气集团有限公司 | Oil field reservoir index curve construction method, system, equipment and storage medium |
| CN112696197B (en) * | 2020-12-30 | 2024-05-14 | 中国石油天然气集团有限公司 | Oilfield reservoir index curve construction method, system, equipment and storage medium |
| GB2608998A (en) * | 2021-07-15 | 2023-01-25 | Equinor Energy As | Reservoir fluid typing |
| GB2608998B (en) * | 2021-07-15 | 2023-09-27 | Equinor Energy As | Reservoir fluid typing |
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