CN104076020A - Method for recognizing reservoir fluid property by adopting three-dimensional quantitative fluorescent longitudinal parametric variation trend - Google Patents
Method for recognizing reservoir fluid property by adopting three-dimensional quantitative fluorescent longitudinal parametric variation trend Download PDFInfo
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Abstract
The invention discloses a method for recognizing reservoir fluid properties by adopting a three-dimensional quantitative fluorescent longitudinal parametric variation trend. The method comprises the following steps: comparing and analyzing oiliness concentration and contrast level data in collected three-dimensional quantitative fluorogram data and a corresponding oil testing conclusion and a well logging interpretation result and establishing the interpretation standards of judging the reservoir fluid properties; collecting and analyzing specimens to be recognized to obtain the three-dimensional quantitative fluorogram data of the specimens to be recognized; determining the reservoir fluid properties by contrasting the oiliness concentration and the comparison level in the three-dimensional quantitative fluorogram data of the specimens to be recognized with the interpretation standards on the basis of the variation trend of well depths. According to the invention, when the method is applied in the Bohai oilfield, the interpretation coincidence rate can reach 89.5%, and the level and the coincidence rate of the comprehensive interpretation fluid properties in well logging fields can be greatly improved; the method is simple, practical, easy to operate and timely and accurate in judgment, and has a very good application and popularization prospect.
Description
Technical field
The present invention relates to petroleum prospecting geological logging interpretation and evaluation technical field, relate in particular to a kind of method of utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum.
Background technology
So-called fluorescence refers under ultraviolet ray is irradiated, fluorescence molecule in crude oil will absorb some energy, temporarily make fluorescence molecule reach a high-energy and unsure state, and when these fluorescence molecules are got back to virgin state by non-steady state, form with light wave is discharged to superfluous energy, and this specific character of oil is called fluorescence.3-D quantitative fluorologging technology is exactly to irradiate sample (comprise any one or more in rock core, the wall heart and landwaste etc.) with the ultraviolet ray of different wave length, produce power transition after absorption of sample exciting light and emitting fluorescence, then detect the glimmering light intensity of emitting at different wavelengths, take wavelength of transmitted light Em as X-axis, excitation wavelength Ex as Y-axis, fluorescence intensity draws out the three-dimensional fluorescence collection of illustrative plates of sample and obtains fluorescence data as Z axis, as shown in Fig. 1 a and 1b, each analytic sample can obtain the parameters such as fluorescence intensity, sample oil concentration, contrast level, index for oiliness.The quick look of 3-D quantitative fluorescence at present mainly relies on contrast and the parameter analysis of sample collection of illustrative plates and adjacent area or offset well oil sample collection of illustrative plates, but at the scene in application process, 3-D quantitative fluorescence pattern does not also form the standard oil sample spectrum library of standard, has had a strong impact on real-time and the accuracy explained.
3-D quantitative fluorescence analysis is nearly new technique growing up for 20 years, just starts to be in recent years applied to oil log industry.Before 3-D quantitative fluorologging technology is not applied, scene is mainly to utilize two-dimensional quantitative fluorologging technology (QFT) to identify, these mud logging techniques analysis data are subject to site operation personnel's operating influence, and (operating personnel choose the amount of sample greatly, the time length of soaking etc.), be more difficult for identifications such as some formation contaminants, drilling fluid contaminated product and various organic additive, faint show of oil and gas in addition.
Three-dimensional is compared with two-dimensional quantitative fluorologging technology, has higher accuracy of detection and abundanter fluorogram information, can reflect multiple fluorescent substance composition, has made up defect and the deficiency of two-dimensional quantitative fluorologging technology.At present, by the method for 3-D quantitative fluorologging judgement properties of fluid in bearing stratum, all belong to the research and probe stage, there is no unified interpretation procedure and standard.What Dagang Oilfield used is that wavelength and equivalent oil content plate are divided properties of fluid in bearing stratum, two-dimentional index for oiliness and single-point calibration equivalent oil content oil-water-layer interpretation and evaluation chart board and three-dimensional index for oiliness and volume calibration equivalent oil content oil-water-layer interpretation and evaluation chart board that Daqing oil field is set up.But equivalent oil content calculates more complicated in this several method, need independent software to calculate, not easy to operate.In addition, all the other calculating parameters of 3-D quantitative fluorologging (contrast level, index for oiliness etc.) are not fully used.
Within 2013, Bohai Bay Oil is introduced 3-D quantitative fluorologging technology, can, by 3-D quantitative fluorologging technical parameter and achievement are analyzed and studied, form the method for utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum.
Summary of the invention
For the deficiencies in the prior art, it is the method that variation tendency that oil concentration and contrast level parameter present along with the variation of well depth is identified properties of fluid in bearing stratum that the technical problem to be solved in the present invention is to provide a kind of 3-D quantitative fluorescence parameter that utilizes.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A method of utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum, is characterized in that, the method comprises the steps:
Oil concentration in the 3-D quantitative fluorescence analysis data of having collected and contrast DBMS are compared with corresponding formation testing conclusion and well logging interpretation achievement, set up the criteria for interpretation of judgement properties of fluid in bearing stratum;
Gather sample to be identified and it is analyzed to the 3-D quantitative fluorescence analysis data that obtain this sample to be identified;
Oil concentration in the 3-D quantitative fluorescence analysis data of the sample to be identified obtaining, contrast level are contrasted and determine properties of fluid in bearing stratum with criteria for interpretation along the variation tendency of well depth.
Compared with prior art, the main advantage of technical solution of the present invention is as follows:
The method of this 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum is in Bohai Bay Oil (KL9-6 structure, LD5-2N structure, PL15-2 structure etc.) application, interpretation coincidence rate reaches 89.5%, has greatly improved level and the coincidence rate of the field integrated explanation fluid properties of well logging.The method is simple and practical easy to operate, and judgement promptly and accurately, has extraordinary application and promotion prospect.
Accompanying drawing explanation
Fig. 1 a is 3-D quantitative fluorescence analysis parameter and three-dimensional collection of illustrative plates, and Fig. 1 b is fingerprint image, i.e. the plane figure of the three-dimensional collection of illustrative plates of Fig. 1 a;
Fig. 2 is the process flow diagram of the method for utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum described in one embodiment of the invention;
Fig. 3 is the method application schematic diagram that utilizes 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum described in one embodiment of the invention;
Fig. 4 is that PL*-*-* well utilizes the present invention to identify the application schematic diagram of properties of fluid in bearing stratum.
Embodiment
The method of 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum of utilizing of the present invention is by studying the 3-D quantitative fluorescence Information integration of old well surveying formation testing sample, the wall heart and newly drilled well, take 3-D quantitative fluorescence analysis parameter as basis, such as oil concentration C and contrast level N parameter, the parameter variation tendency recognition methods to properties of fluid in bearing stratum has been proposed.Wherein, oil concentration (C) refers to the oil concentration of fluorescent material in unit sample, and that it reflects is the oily abundance in sample, the mg/l of unit; Contrast level (N) refers to the corresponding fluorescence series of fluorescent material correlation grade in unit sample.
As shown in Figure 2, the method for utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum described in one embodiment of the invention comprises the steps:
Step 1, oil concentration in the 3-D quantitative fluorescence analysis data of having collected and contrast DBMS are compared with corresponding formation testing conclusion and well logging interpretation achievement, set up the criteria for interpretation of judgement properties of fluid in bearing stratum, preferably oil concentration and contrast DBMS are compared with corresponding formation testing conclusion and well logging interpretation achievement with the data splitting of existing logging method data.
Take oil concentration C and a contrast level N in a large amount of 3-D quantitative fluorologging data of collecting is Main Analysis parameter, in order to identify more accurately properties of fluid in bearing stratum, other parameters in preferred combination 3-D quantitative fluorologging data are index for oiliness (Oc) for example, again in conjunction with the data and information of corresponding gas detection logging for example gas survey full dose, and the data and information of fluorescent scanning well logging, and compare with formation testing conclusion and well logging interpretation achievement, obtain mainly interpretation and evaluation standard and the feature of the variation tendency that presents along with the variation of well depth based on oil concentration C and contrast level N, as following table 1.Wherein, index for oiliness (Oc) refers to the intensity level and the ratio of intensity level that represents the maximum fluorescence peak of lightweight oil composition at the maximum fluorescence peak of matter oil component in representative.
Table 1 interpretation and evaluation standard and feature
The distinguishing characteristics of different reservoir fluid properties:
1) essential characteristic of gas-bearing formation:
Oil concentration, contrast level are relatively stable, and oiliness is more even;
Index for oiliness is relatively stable, conforms to the characteristic parameter span of same block standard oil, is generally less than 1;
General index for oiliness is lower than 1, and contrast level is greater than 6 and just should arouses attention.
2) essential characteristic of oil reservoir:
Oil concentration, contrast level are relatively high, and oiliness is more even;
Oil concentration, contrast level have a rising tendency on the whole;
Index for oiliness is relatively stable, conforms to the characteristic parameter span of same block standard oil;
For lightweight oil, want special consideration, general index for oiliness is lower than 2, and contrast level is greater than 6 just should cause hollow meaning.
3) essential characteristic of oil-water common-layer:
Oil concentration, contrast level top are relatively high;
In same layer, oil concentration, contrast level have the trend of reduction on the whole;
Index for oiliness changes in bottom is large, and obviously lay particular stress on than the characteristic parameter span with block standard oil sample bottom.
4) essential characteristic of water layer and dry layer:
Oil concentration, contrast level are relatively low;
Oil concentration, contrast level be skewness on the whole.
Step 2, gathers sample to be identified and it is analyzed to the 3-D quantitative fluorescence analysis data that obtain this sample to be identified.
First aligning drilling well display layer samples, sample comprises in landwaste, the wall heart and rock core any one or more, then sample is placed on to immersion in normal hexane, dilution, instrumental analysis, obtain fluorescence intensity (F), excitation wavelength (Ex), emission wavelength (Em), calculate oil concentration (C), contrast level (N), index for oiliness (Oc) parameter.Wherein, in excitation wavelength (Ex) and emission wavelength (Em) reflection crude oil different hydrocarbons material go out peak position; Fluorescence intensity (F) refers to the power of the fluorescent material institute emitting fluorescence in crude oil, reflection be the number of fluorescent material in sample.
Step 3, contrasts and determines properties of fluid in bearing stratum with criteria for interpretation according to oil concentration in the 3-D quantitative fluorescence analysis data of this sample to be identified obtaining and the contrast grade variation tendency along well depth.
Preferably oil concentration being surveyed to the Information integrations such as full dose and fluorescent scanning with contrast level with other 3-D quantitative fluorologging parameters such as the gentle survey logging data of index for oiliness (Oc) such as gas is plotted on a chart, as shown in Figure 3, according to parameter, along the variation tendency of well depth, carry out integrated interpretation and judgement.
Below, by concrete instance, the method for 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum of utilizing of the present invention is described further.
PL*-*-* well, on-the-spot from well depth 660.00-720.00m brill chance show of oil and gas, 3-D quantitative fluorescence analysis is carried out to cutting sampling in scene, analysis result is as following table 2, by the contrast level N in 3-D quantitative fluorescence parameter and index for oiliness Oc and gas measured value are plotted in a section of synthetic interpretation, as shown in Figure 4, according to parameter, along the variation tendency of well depth, find, after 685.00m, along with increasing, well depth contrasts level decline (14.5 drop to 4.8), index for oiliness raise gradually (3.2 are increased to 8.6), gas is surveyed full dose obviously decline (16.47% drops to 0.94%), utilizing the method judgement 685.00m of identification properties of fluid in bearing stratum of the present invention is water-oil interface, so judge that this layer is oil-water common-layer.By logging trace, judge on 685.00m to be oil reservoir, bottom is water layer, consistent with the judgement of 3-D quantitative fluorologging.
Table 2 PL*-*-* well 3-D quantitative fluorescence analysis tables of data
Claims (5)
1. a method of utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum, is characterized in that, the method comprises the steps:
Oil concentration in the 3-D quantitative fluorescence analysis data of having collected and contrast DBMS are compared with corresponding formation testing conclusion and well logging interpretation achievement, set up the criteria for interpretation of judgement properties of fluid in bearing stratum;
Gather sample to be identified and it analyzed to the 3-D quantitative fluorescence analysis data that obtain this sample to be identified:
Oil concentration in the 3-D quantitative fluorescence analysis data of the sample to be identified obtaining, contrast level are contrasted and determine properties of fluid in bearing stratum with criteria for interpretation along the variation tendency of well depth.
2. the method for utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum as claimed in claim 1, it is characterized in that, the oil concentration in the 3-D quantitative fluorescence analysis data of having collected and contrast DBMS are compared and further comprised with corresponding formation testing conclusion and well logging interpretation achievement: the oil concentration in the 3-D quantitative fluorescence analysis data of having collected and contrast grade are compared in conjunction with index for oiliness and corresponding formation testing conclusion and well logging interpretation achievement;
Oil concentration in the 3-D quantitative fluorescence analysis data of the sample to be identified obtaining, the contrast grade variation tendency along well depth are contrasted with criteria for interpretation and determine that properties of fluid in bearing stratum further comprises: the variation tendency by the oil concentration in the 3-D quantitative fluorescence analysis data of the sample to be identified obtaining, contrast level and index for oiliness along well depth contrasts and determines properties of fluid in bearing stratum with criteria for interpretation.
3. the method for utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum as claimed in claim 1, it is characterized in that, the oil concentration in the 3-D quantitative fluorescence analysis data of having collected and contrast DBMS are compared and further comprised with corresponding formation testing conclusion and well logging interpretation achievement: the oil concentration in the 3-D quantitative fluorogram data of having collected and contrast level are compared with corresponding formation testing conclusion and well logging interpretation achievement in conjunction with gas survey full dose;
Oil concentration in the 3-D quantitative fluorescence analysis data of the sample to be identified obtaining, the contrast grade variation tendency along well depth are contrasted with criteria for interpretation and determine that properties of fluid in bearing stratum further comprises: the variation tendency by the oil concentration in the 3-D quantitative fluorescence analysis data of the sample to be identified obtaining, contrast level and gas survey full dose along well depth contrasts and determines properties of fluid in bearing stratum with criteria for interpretation.
4. the method for utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum as claimed in claim 1, it is characterized in that, the oil concentration in the 3-D quantitative fluorescence analysis data of having collected and contrast DBMS are compared and further comprised with corresponding formation testing conclusion and well logging interpretation achievement: the oil concentration in the 3-D quantitative fluorescence analysis data of having collected and contrast level are compared with corresponding formation testing conclusion and well logging interpretation achievement in conjunction with index for oiliness and gas survey full dose;
Oil concentration in the 3-D quantitative fluorogram data of the sample to be identified obtaining, the contrast grade variation tendency along well depth are contrasted with criteria for interpretation and determine that properties of fluid in bearing stratum further comprises: the variation tendency by the oil concentration in the 3-D quantitative fluorescence analysis data of the sample to be identified obtaining, contrast level and the gentle survey full dose of index for oiliness along well depth contrasts and determines properties of fluid in bearing stratum with criteria for interpretation.
5. the method for utilizing 3-D quantitative fluorescence parameter identification properties of fluid in bearing stratum as claimed in claim 1, is characterized in that, this sample to be identified comprises in landwaste, the wall heart and rock core any one or more.
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| CN111487234A (en) * | 2020-06-29 | 2020-08-04 | 中石化胜利石油工程有限公司地质录井公司 | Method for judging whether reservoir contains water or not by utilizing three-dimensional quantitative fluorescence spectrogram characteristics |
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| CN112505004A (en) * | 2020-10-29 | 2021-03-16 | 中国石油天然气股份有限公司 | Fluorescence detection method and device and computer equipment |
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| CN112730361A (en) * | 2020-12-21 | 2021-04-30 | 北京永盛通科技发展有限公司 | Ultraviolet multiband chromatography test method and device for petroleum fluorescent logging detection |
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