CN105003238B - Underground steam mass dryness fraction method is analyzed using wellbore pressure temperature profile - Google Patents

Underground steam mass dryness fraction method is analyzed using wellbore pressure temperature profile Download PDF

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Publication number
CN105003238B
CN105003238B CN201510437301.5A CN201510437301A CN105003238B CN 105003238 B CN105003238 B CN 105003238B CN 201510437301 A CN201510437301 A CN 201510437301A CN 105003238 B CN105003238 B CN 105003238B
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steam
steam quality
depth
dimension
value
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CN105003238A (en
Inventor
杜晓村
熊兆洪
魏鸿依
黄春
张素朋
王东
王荣艳
马国伦
张秀芳
毕新忠
荣伟
杨阳
张静
杨光
盛玉安
郝园园
董健
张旋
陈娟
杨璐
刘利鑫
杨娜
孙鹏
禇庆雨
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China Petroleum and Chemical Corp
Sinopec Shengli Oilfield Co Gudong Oil Extraction Plant
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Abstract

One kind, according to pit shaft and formation properties, sets up heat conduction and heat leakage model using wellbore pressure temperature profile analysis underground steam mass dryness fraction method;Whole pit shaft is divided into multiple depth segments in units of dimension;Set up corresponding calculation procedure, including saturation temperature, saturation pressure, single-phase density, viscosity, vertically downward etc. variations in flow patterns model;By average value in the equal taken amount guiding principle of calculating parameter, using well head as initial depth, a steam quality parameter is set, application settings steam quality and measure temperature computation underground steam flow resistance, with reference to flow pattern and combined density, down-hole pressure gradient is obtained, by gained gradient and observed pressure gradient comparison;With the corresponding enthalpy of wet steam of the mass dryness fraction value that obtains and observed pressure, temperature computation, a dimension section heat loss amount is calculated with theoretical method, obtain the enthalpy of next depth, calculate steam quality, using this steam quality value as setting value, above-mentioned calculating is repeated, obtain the depth segment steam quality.

Description

Underground steam mass dryness fraction method is analyzed using wellbore pressure temperature profile
Technical field
The present invention relates to the method that oil-field thick-oil well exploits steam injection profile analysis underground steam mass dryness fraction, specifically one Plant using wellbore pressure temperature profile analysis underground steam mass dryness fraction method.
Background technology
At present, in heavy oil wells steam injection development process, underground monitoring technology generally realizes the survey of the pressure of underground, temperature Examination, well sampling and the theoretical method for calculating mainly are taken for the monitoring of mass dryness fraction.Under the former needs individually in two methods Enter downhole sampler, and to distinguish under lower going-into-well for different depth;The latter is flow, the combination of mass dryness fraction situation according to ground Ground and underground steam transmitting pipe line, the property and environmental aspect of tubing string, the heat loss amount in computational theory, so as to calculate the dry of underground Degree, and the real conditions of underground are not known.
The content of the invention
The drawbacks described above that the purpose of the present invention exists aiming at prior art, design is a kind of to be cutd open using wellbore pressure temperature Surface analysis underground steam mass dryness fraction method.
The present invention is realized by following technical proposals:
Underground steam mass dryness fraction method is analyzed using wellbore pressure temperature profile, including:According to pit shaft and formation properties, set up Heat conduction and heat leakage model;Needed according to precision, it is determined that calculating dimension, whole pit shaft is divided into the multiple in units of dimension Depth segment;Corresponding calculation procedure is set up using water and steam theory, including it is saturation temperature, saturation pressure, single-phase density, viscous Degree, vertically downward variations in flow patterns model;By average value in the equal taken amount guiding principle of calculating parameter, result of calculation is also in units of dimension Average value;Using well head or other depth as initial depth, one steam quality parameter of combined ground steam parameter or setting will It is used as the setting steam quality for calculating;Application settings steam quality and temperature computation underground steam flow resistance is measured, with reference to Flow pattern and combined density, obtain down-hole pressure gradient, by gained gradient and observed pressure gradient comparison;According to comparing result, if Result is consistent with actual measurement, then steam quality is actual with underground is consistent for explanation setting;If inconsistent, with observed pressure gradient and institute Flow resistance sum calculates moist steam density, a new steam quality is then calculated, using this steam quality as setting Value, until obtaining the steam quality being consistent with actual measurement;With the corresponding moist steam of the mass dryness fraction value that obtains and observed pressure, temperature computation Enthalpy, a heat loss amount for dimension section is calculated with theoretical method, obtains the enthalpy of next depth, calculates steam quality, and this is steamed Vapour mass dryness fraction value repeats above-mentioned recursive calculation as setting value, obtains the steam quality of the depth segment.
The beneficial effects of the invention are as follows:Steam injection profile analysis underground steam mass dryness fraction, behaviour are exploited suitable for oil-field thick-oil well Make easy, logging data application efficiency high reduces construction times of going into the well, reduce the possibility of accidental error, obtain whole pit shaft Steam quality change section, data is more accurate.Theoretical projectional technique is compared, gained steam quality data is based on underground reality Survey data, reliability and accuracy are higher.Obtained by underground mass dryness fraction section, can be to down-hole string(Including certain section of instlated tubular) Effect of heat insulation, down-hole accident situations such as make evaluation in time.
Brief description of the drawings
Fig. 1-analysis process block diagram of the invention.
Specific embodiment
Implementation of the invention is further elaborated below in conjunction with the accompanying drawings:
Underground steam mass dryness fraction method is analyzed using wellbore pressure temperature profile, including:
1., according to pit shaft and formation properties, heat conduction and heat leakage model are set up;
2. needed according to precision, it is determined that calculating dimension, whole pit shaft is divided into the multiple depth segments in units of dimension;
3. set up corresponding calculation procedure using water and steam theory, including saturation temperature, saturation pressure, single-phase density, Viscosity, vertically downward variations in flow patterns model;
4., by average value in the equal taken amount guiding principle of calculating parameter, result of calculation is also the average value in units of dimension;
5., using well head or other depth as initial depth, one steam quality of combined ground steam parameter or setting is joined Number, as the setting steam quality for calculating;
6. application settings steam quality and temperature computation underground steam flow resistance is measured, with reference to flow pattern and combined density, Down-hole pressure gradient is obtained, by gained gradient and observed pressure gradient comparison;
7., according to comparing result, if result is consistent with actual measurement, illustrate that steam quality is actual with underground is consistent for setting;If no Unanimously, then moist steam density is calculated with gained flow resistance sum with observed pressure gradient, then calculates a new steam Mass dryness fraction, using this steam quality as setting value, repeats the 5th step and calculates, until obtaining the steam quality being consistent with actual measurement;
8., with the enthalpy of the corresponding moist steam of the mass dryness fraction value that obtains and observed pressure, temperature computation, one is calculated with theoretical method The heat loss amount of dimension section, obtains the enthalpy of next depth, calculates steam quality, using this steam quality value as setting value, weight Multiple above-mentioned 5th step, the 6th step are calculated, and obtain the steam quality of the depth segment;
9. according to steam quality, so as to calculate the steam quality section of pit shaft.

Claims (1)

1. a kind of using wellbore pressure temperature profile analysis underground steam mass dryness fraction method, its method is:First, according to pit shaft and ground Layer property, sets up heat conduction and heat leakage model;Secondly, as required, it is determined that calculate dimension be 1m, by whole pit shaft be divided into Dimension is multiple depth segments of unit;3rd, set up corresponding calculation procedure using water and steam theory, including saturation temperature, Saturation pressure, single-phase density, vertically downward viscosity, variations in flow patterns model;4th, by average value in the equal taken amount guiding principle of calculating parameter, Result of calculation is then the average value in units of dimension;5th, using well head or other depth as initial depth, combined ground steams One steam quality parameter of vapour parameter or setting, as the setting steam quality for calculating;6th, application settings steam quality With measure temperature computation underground steam flow resistance, with reference to flow pattern and combined density, down-hole pressure gradient is obtained, by gained gradient With observed pressure gradient comparison;7th, according to comparing result, if result is consistent with actual measurement, illustrate to set steam quality and well It is lower to be actually consistent;If inconsistent, moist steam density is calculated with gained flow resistance sum with observed pressure gradient, then calculated Go out a new steam quality, using this steam quality as setting value, repeat the 5th step and calculate, until obtaining what is be consistent with actual measurement Steam quality;8th, with the enthalpy of the corresponding moist steam of the mass dryness fraction value and the observed pressure that obtain, temperature computation, calculated with theoretical method One heat loss amount of dimension section, obtains the enthalpy of next depth, steam quality is calculated, using this steam quality value as setting Value, repeats the 5th step, the calculating of the 6th step, obtains the steam quality of the depth segment.
CN201510437301.5A 2015-07-24 2015-07-24 Underground steam mass dryness fraction method is analyzed using wellbore pressure temperature profile Expired - Fee Related CN105003238B (en)

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CN108318620A (en) * 2017-12-22 2018-07-24 中国石油天然气股份有限公司 The steam quality of steam injection pipe determines method and apparatus
CN110344796B (en) * 2018-04-04 2021-08-06 中国石油化工股份有限公司 Steam injection parameter prediction method based on three-parameter principle

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RU2312329C1 (en) * 2006-03-24 2007-12-10 Шлюмберже Текнолоджи Б.В. Method of determining vapor dryness
WO2010062208A1 (en) * 2008-11-28 2010-06-03 Schlumberger Canada Limited Method for estimation of sagd process characteristics
CN102134988B (en) * 2010-11-18 2013-09-25 中国石油化工股份有限公司 Method for measuring dryness of downhole steam in thermal recovery horizontal well
CN102322255B (en) * 2011-07-21 2015-11-18 中国石油天然气股份有限公司 The detection method of on-the-spot steam injection insulated tubing, device and system
CN103590818B (en) * 2013-10-21 2016-01-06 中国石油天然气股份有限公司 A kind of shaft interior temperature distribution semi-analytical determination method and device
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