CN101701521A - Well logging quantitative interpretation method based on fast chromatographic analyzer - Google Patents
Well logging quantitative interpretation method based on fast chromatographic analyzer Download PDFInfo
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- CN101701521A CN101701521A CN200910310910A CN200910310910A CN101701521A CN 101701521 A CN101701521 A CN 101701521A CN 200910310910 A CN200910310910 A CN 200910310910A CN 200910310910 A CN200910310910 A CN 200910310910A CN 101701521 A CN101701521 A CN 101701521A
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Abstract
The invention relates to the field of petroleum well logging, in particular to a well logging quantitative interpretation method based on a fast chromatographic analyzer, which is characterized by at least comprising the following steps of: (1) extracting samples; (2) outputting volume percentage parameters of sample de-aerated gas by the fast chromatographic analyzer; (3) submitting the data of the fast chromatographic analyzer (7) to a processing unit for processing; (4) classifying each well obtained by a sampling well drilling system according to the performance of oil contained in the stratum layer by layer; (5) storing the parameters calculated at the step (3) and the stratum contained oil classifying layers obtained at the step (4) in the same layer, finding out common options of each stratum contained oil classifying layer distributed in all sampling drilled wells and corresponding layer analyzing parameters, solving the minimum of the common options of all sampling drilled wells as threshold; (6) marking the obtained stratum contained oil classification of the sampling drilled wells in the whole drilled well region in a form of a geographic information chart; and (7) searching the working key points of the whole drilled well region with the geographic information chart. The invention realizes fast spectrum evaluation and quantization, solves the problems that the traditional interpretation has low coincidence rate and large difficulty and can not be quantitatively interpreted, and provides more reliable technical support for the interpretation and the evaluation of the reservoir property.
Description
Technical field
The invention belongs to the oil log field, particularly a kind of well logging quantitative interpretation method based on fast chromatographic analyzer.
Technical background
In the oil log, need an overall understanding be arranged, normally, obtain the firsthand information by exploitation that mining area is sampled to mining area.By sample data the overall picture of mining area there is a quantitative understanding.Then in the exploitation of carrying out emphasis and the combination of inferior point.Quantitative understanding method at present commonly used be pik this rein in hydrocarbon ratio method, 3H chart method and hydrocarbon component axonometric projection method etc., its advantage is convenient and swift, but because the accuracy of data acquisition is subjected in various degree restriction and influence, interpretation coincidence rate is lower, its interpretation chart also mainly rests on the aspect of qualitative understanding, and the qualitative evaluation standard can not be unified, and the on-site interpretation operation easier is very big.Though modern mode identification technology such as fuzzy comprehensive evoluation and neutral net is widely used, these methods exist data volume big, obey shortcomings such as certain typical probability distribution, computational methods complexity or intermediate parameters are difficult for determining.
Summary of the invention
The purpose of this invention is to provide well logging quantitative interpretation method based on fast chromatographic analyzer, so that realize flash chromatography evaluation and quantification, solve existing means of interpretation coincidence rate low, explain big, the problem that can't quantitative interpretation of difficulty, for the reservoir property interpretation and evaluation provides more reliable guidance.
The object of the present invention is achieved like this, and the well logging quantitative interpretation method based on fast chromatographic analyzer is characterized in that: which comprises at least following steps:
1) leaching process of sample;
2) fast chromatographic analyzer is to the volumn concentration parameter output of sample degassing gas;
3) data of fast chromatographic analyzer are submitted to processing unit and are handled;
4) classify by layer according to each well stratum oil-containing character that obtains of sampling well system;
5) the stratum oil-containing classification layer that obtains of parameter that step 3) is calculated and step 4) stores with identical layer, find out the common option that all sampling drilling wells are distributed in oil-containing classification of each layer stratum and respective layer analysis parameter, the minimum value of obtaining the common options of all sampling drilling wells is as threshold values;
6) will sample stratum oil-containing classification that drilling well obtains is labeled in whole drilling area in the mode of geography information figure;
7) seek the operation keypoint of whole drilling area with geography information figure.
The leaching process of the sample in the described step 1) is: the flash chromatography degasser, circulation of drilling fluid jar, fast chromatographic analyzer and the processing unit that are based upon the sampling drilling well, drilling fluid enters in the circulation of drilling fluid jar by the circulation of drilling fluid pipeline in the well, drilling fluid is through the degassing of flash chromatography degasser in the circulation of drilling fluid jar, sends into fast chromatographic analyzer by the fast chromatographic analyzer gas circuit pipeline gas that will outgas.
Described step 2) fast chromatographic analyzer is by the volumn concentration of specifying the gas that detaches in the depth interval record drilling fluid to the volumn concentration parameter output of sample degassing gas in, the volumn concentration of gas comprises 8 basic parameters: total hydrocarbon, the gas percentage composition of methane, the gas percentage composition of ethane, the gas percentage composition of propane, the gas percentage composition of normal butane, the gas percentage composition of iso-butane, the gas percentage composition of pentane, the gas percentage composition of isopentane, depth interval are the maximum values by all parameter cycles of 30 seconds cycles time record.
The data of fast chromatographic analyzer are submitted to processing unit and handled and be in the described step 3): processing unit is obtained the analysis parameter by 8 basic parameters of every layer of sampling drilling well by following formula:
QT＝C1+C2+C3+NC4+IC4+NC5+IC5
WH＝(QT-C1)/C1
BH＝(C1+C2)/(C3+IC4+NC4+IC5+NC5)
CH＝(IC4+NC4+IC5+NC5)/C3
X1＝IC4/C3
X2＝IC4/NC4
X3＝(C3+IC4+NC4+IC5+NC5)/(IC4+NC4+IC5+NC5)
X4＝IC4/C1
X5＝C1/(IC4+NC4+IC5+NC5)
X6＝C1/QT
X7＝C2/QT
X8＝C3/QT
X9＝(IC4+NC4)/QT
X10＝C1/C2
X11＝C1/C3
X12＝(IC5+NC5)/QT
X13＝IC5/NC5
X14＝(IC4+IC5)/(NC5+NC4)
X15＝C3/C2
X16＝C2/(IC4+NC4)
X17＝C2/(IC5+NC5)
X18＝C2/(QT-C1-C2)
X19＝C2/(QT-C1)
X20＝C3/(QT-C1)
Described fast chromatographic analyzer is as the cycle with 25 seconds-35 seconds to the volumn concentration of sample degassing gas.
Described analysis parameter can reconfigure algorithm to 8 basic parameters as required.
Advantage of the present invention: the present invention has made the real realization of flash chromatography interpretation and evaluation and has quantized to explain, improve the whole interpretation coincidence rate to 75.4% of flash chromatography well logging, Ji's plateau area quantitative interpretation chart interpretation coincidence rate of setting up reaches 76.9%, and high 52 wellblock quantitative interpretation chart interpretation coincidence rates reach 85.0%.
Description of drawings
The invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1 embodiment of the invention system architecture schematic diagram;
Fig. 2 is flash chromatography quantitative interpretation key diagram 1;
Fig. 3 is flash chromatography quantitative interpretation key diagram 2;
Fig. 4 is flash chromatography quantitative interpretation key diagram 3.
Among the figure: 1, sampling drilling well; 2, drilling fluid in the well; 3, circulation of drilling fluid pipeline; 4, circulation of drilling fluid jar; 5, flash chromatography degasser; 6, fast chromatographic analyzer gas circuit pipeline; 7, fast chromatographic analyzer; 8, processing unit; 9, drilling area.
The specific embodiment:
As shown in Figure 1, a kind of speedy chromatograph well log quantitative interpretation system, need be at sampling drilling well 1 distribution flash chromatography degasser 5, circulation of drilling fluid jar 4, fast chromatographic analyzer 7 and processing unit 8, drilling fluid 2 enters in the circulation of drilling fluid jar 4 by circulation of drilling fluid pipeline 3 in the well, drilling fluids are through 5 degassings of flash chromatography degasser in the circulation of drilling fluid jar 4, send into fast chromatographic analyzer 7 by fast chromatographic analyzer gas circuit pipeline 6 gas that will outgas; Analyze the volumn concentration of degassing gas by fast chromatographic analyzer 7, comprise 8 basic parameter: TG (total hydrocarbon), C1 (the gas percentage composition of methane), C2 (the gas percentage composition of ethane), C3 (the gas percentage composition of propane), NC4 (the gas percentage composition of normal butane), IC4 (the gas percentage composition of iso-butane), NC5 (the gas percentage composition of pentane), IC5 (the gas percentage composition of isopentane).8 basic parameters of 7 pairs of sampling of fast chromatographic analyzer drilling well 1 are as the cycle with 25 seconds-35 seconds.We are general to adopt 30 seconds as one-time detection, each depth interval has the detection of 8 basic parameters in a plurality of cycles in the drilling process of a sampling drilling well 1, at last all data of each depth interval are obtained the maximum value of every parameter, transferred to processing unit 8 and go out reason at last.
As shown in Figure 2, drilling area 9 varies, but a drilling area 9 generally all has identical oil bearing formation property sort feature.Set up a kind of speedy chromatograph well log quantitative interpretation system, the process among Fig. 1 need be operated all sampling drilling wells 1 of drilling area among Fig. 29, the maximum value parameter of each depth interval is transferred to processing unit 8 handle at last.
8 basic parameter: TG (total hydrocarbon) in the volumn concentration of gas, C1 (the gas percentage composition of methane), C2 (the gas percentage composition of ethane), C3 (the gas percentage composition of propane), NC4 (the gas percentage composition of normal butane), IC4 (the gas percentage composition of iso-butane), NC5 (the gas percentage composition of pentane), IC5 (the gas percentage composition of isopentane) will obtain different analysis parameters through different algorithm combination, these analyze the stratum oil-containing character that parameter is used to describe certain sheet oil district, and the stratum oil-containing character in oil district is divided into oil reservoir usually, oil-water common-layer, water layer, do layer, the difference oil reservoir.Processing unit 8 is obtained the analysis parameter by 8 basic parameters of every layer of sampling drilling well 1 by following formula;
QT＝C1+C2+C3+NC4+IC4+NC5+IC5
WH＝(QT-C1)/C1
BH＝(C1+C2)/(C3+IC4+NC4+IC5+NC5)
CH＝(IC4+NC4+IC5+NC5)/C3
X1＝IC4/C3
X2＝IC4/NC4
X3＝(C3+IC4+NC4+IC5+NC5)/(IC4+NC4+IC5+NC5)
X4＝IC4/C1
X5＝C1/(IC4+NC4+IC5+NC5)
X6＝C1/QT
X7＝C2/QT
X8＝C3/QT
X9＝(IC4+NC4)/QT
X10＝C1/C2
X11＝C1/C3
X12＝(IC5+NC5)/QT
X13＝IC5/NC5
X14＝(IC4+IC5)/(NC5+NC4)
X15＝C3/C2
X16＝C2/(IC4+NC4)
X17＝C2/(IC5+NC5)
X18＝C2/(QT-C1-C2)
X19＝C2/(QT-C1)
X20＝C3/(QT-C1)
Analyze the different layers of corresponding different sampling drilling well of parameter 1 and sampling drilling well 1 or be inequality at interval for these 23.
In to Fig. 2 23 of the different interval of all sampling drilling wells 1 analyze parameters and obtain after, need correspond to all sampling drilling wells 1 realize the real different interval that obtains after drilling well is finished oil reservoir, oil-water common-layer, water layer, do in layer, the difference oil reservoir and go.As, 1000 meters at the 1# fixed well is oil reservoir, and 500 meters is oil-water common-layer, and 200 meters is water layer, 0-100 rice is for doing layer, 1200 meters are the difference oil reservoir, and at 2# fixed well and 3# fixed well and 1# fixed well essentially identical result are arranged, just at 0-100 rice in the 4# fixed well for doing layer, 230 meters is water layer, 600 meters is oil-water common-layer, and 1020 meters is oil reservoir, and 1200 meters are the difference oil reservoir.0-100 rice is for doing layer in the 5# fixed well, and 200 meters is water layer, and 650 meters is oil-water common-layer, and 1030 meters is oil reservoir, and 1210 meters are the difference oil reservoir.Layer be subdivided into 0.8 meter to divide, per 0.8 meter all has one group 23 to analyze parameters, 23 of all groups is analyzed parameters correspond in the above-mentioned known results of the fixed well of verifying accordingly the thing that will find to have certain law.
As shown in Figure 3, provide different sampling drilling wells 1 and analyze the analysis result that parameter provides by 23 when different well depth, curve A is a water layer, and curve B is an oil reservoir, and curve C for curve A, is analyzed X14＞0.536 in the parameter, X7＜0.14 for the difference oil reservoir for 23.For curve B, analyze in the parameter X14＞0.536, X7＞0.18, X10＞2.7 for 23.For curve C, 0.18＞X7＞0.17, X10＞2.7 that is to say, analyze in the parameter for 23 and have only X14, X7 in each mouthful sampling drilling well 1 identical general character to be arranged with X10.In the sampling drilling well of just being obtained, with the minimum value of the common option of a certain analysis parameter as threshold values; Can have one to get information about to the unknown drilling well of drilling area 9 with these threshold values as foundation, other concrete stratum oil-containing character can be provided by table 1.
It is as shown in table 1,
Table 1
As shown in Figure 4, the stratum oil-containing classification geography information that obtains is labeled in the whole drilling area with curve, seeks the operation keypoint of whole drilling area by geography information figure.Analyze parameter among the present invention and can reconfigure algorithm to 8 basic parameters as required.
Claims (6)
1. based on the well logging quantitative interpretation method of fast chromatographic analyzer, it is characterized in that: which comprises at least following steps:
1) leaching process of sample;
2) fast chromatographic analyzer is to the volumn concentration parameter output of sample degassing gas;
3) data of fast chromatographic analyzer (7) are submitted to processing unit and are handled;
4) classify by layer according to each well stratum oil-containing character that obtains of sampling well system;
5) the stratum oil-containing classification layer that obtains of parameter that step 3) is calculated and step 4) stores with identical layer, find out the common option that all sampling drilling wells are distributed in oil-containing classification of each layer stratum and respective layer analysis parameter, the minimum value of obtaining the common options of all sampling drilling wells is as threshold values;
6) will sample stratum oil-containing classification that drilling well obtains is labeled in whole drilling area in the mode of geography information figure;
7) seek the operation keypoint of whole drilling area with geography information figure.
2. the well logging quantitative interpretation method based on fast chromatographic analyzer according to claim 1, it is characterized in that: the leaching process of the sample in the described step 1) is: the flash chromatography degasser (5) that is based upon sampling drilling well 1, circulation of drilling fluid jar (4), fast chromatographic analyzer (7) and processing unit (8), drilling fluid (2) enters in the circulation of drilling fluid jar (4) by circulation of drilling fluid pipeline (3) in the well, the interior drilling fluid of circulation of drilling fluid jar (4) is through flash chromatography degasser (5) degassing, sends into fast chromatographic analyzer (7) by fast chromatographic analyzer gas circuit pipeline (6) gas that will outgas.
3. the well logging quantitative interpretation method based on fast chromatographic analyzer according to claim 1, it is characterized in that: fast chromatographic analyzer is by the volumn concentration of specifying the gas that detaches in the depth interval record drilling fluid to the volumn concentration parameter output of sample degassing gas described step 2), the volumn concentration of gas comprises 8 basic parameters: total hydrocarbon, the gas percentage composition of methane, the gas percentage composition of ethane, the gas percentage composition of propane, the gas percentage composition of normal butane, the gas percentage composition of iso-butane, the gas percentage composition of pentane, the gas percentage composition of isopentane, depth interval are the maximum values by all parameter cycles of 30 seconds cycles time record.
4. the well logging quantitative interpretation method based on fast chromatographic analyzer according to claim 1 is characterized in that: the data of fast chromatographic analyzer in the described step 3) (7) are submitted to processing unit (8) and handled and be: processing unit (8) is obtained the analysis parameter by 8 basic parameters of every layer of sampling drilling well by following formula.
QT＝C1+C2+C3+NC4+IC4+NC5+IC5
WH＝(QT-C1)/C1
BH＝(C1+C2)/(C3+IC4+NC4+IC5+NC5)
CH＝(IC4+NC4+IC5+NC5)/C3
X1＝IC4/C3
X2＝IC4/NC4
X3＝(C3+IC4+NC4+IC5+NC5)/(IC4+NC4+IC5+NC5)
X4＝IC4/C1
X5＝C1/(IC4+NC4+IC5+NC5)
X6＝C1/QT
X7＝C2/QT
X8＝C3/QT
X9＝(IC4+NC4)/QT
X10＝C1/C2
X11＝C1/C3
X12＝(IC5+NC5)/QT
X13＝IC5/NC5
X14＝(IC4+IC5)/(NC5+NC4)
X15＝C3/C2
X16＝C2/(IC4+NC4)
X17＝C2/(IC5+NC5)
X18＝C2/(QT-C1-C2)
X19＝C2/(QT-C1)
X20＝C3/(QT-C1)
5. the well logging quantitative interpretation method based on fast chromatographic analyzer according to claim 1, its method is: described fast chromatographic analyzer is as the cycle with 25 seconds-35 seconds to the volumn concentration of sample degassing gas.
6. the well logging quantitative interpretation method based on fast chromatographic analyzer according to claim 1, its method is: described analysis parameter can reconfigure algorithm to 8 basic parameters as required.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928518A (en) * | 2011-08-11 | 2013-02-13 | 中国石油化工股份有限公司 | Method for measuring degassing efficiency of drilling fluid through complete degassing value-gas measuring value process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928518A (en) * | 2011-08-11 | 2013-02-13 | 中国石油化工股份有限公司 | Method for measuring degassing efficiency of drilling fluid through complete degassing value-gas measuring value process |
| CN102928518B (en) * | 2011-08-11 | 2014-07-02 | 中国石油化工股份有限公司 | Method for measuring degassing efficiency of drilling fluid through complete degassing value-gas measuring value process |
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Application publication date: 20100505 |