CN108868720A - A kind of judgment method that SAGD steam injection well toe-end steam is excessive along pit shaft direction - Google Patents
A kind of judgment method that SAGD steam injection well toe-end steam is excessive along pit shaft direction Download PDFInfo
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- CN108868720A CN108868720A CN201810775871.9A CN201810775871A CN108868720A CN 108868720 A CN108868720 A CN 108868720A CN 201810775871 A CN201810775871 A CN 201810775871A CN 108868720 A CN108868720 A CN 108868720A
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- toe
- steam
- injection well
- reservoir fluid
- distribution pattern
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/16—Enhanced recovery methods for obtaining hydrocarbons
- E21B43/24—Enhanced recovery methods for obtaining hydrocarbons using heat, e.g. steam injection
Abstract
The present invention relates to a kind of judgment methods that SAGD steam injection well toe-end steam is excessive along pit shaft direction, include the following steps：1) the reservoir fluid distribution pattern for obtaining each prospect pit of subject oil field using rock core information and well log interpretation, evaluating Jing Chu, wherein reservoir fluid distribution pattern refers to the specific distribution situation of longitudinal Shang Shui, mud, oil；2) on the basis of obtaining each prospect pit, evaluating the reservoir fluid distribution pattern of Jing Chu, according to earthquake information, the reservoir fluid distribution pattern in the oil field gamut is obtained using the method for stochastic simulation；3) judged for the steam injection well toe-end reservoir conditions in every a pair of SAGD well：When the reservoir fluid distribution pattern of steam injection well toe-end is " toe-end bores chance or toe-end top is shale layer+water layer integrated mode ", then judge that steam can be excessive along pit shaft direction.
Description
Technical field
The present invention relates to a kind of judgment methods that SAGD steam injection well toe-end steam is excessive along pit shaft direction.
Background technique
In the long lake East (LongLake) of Canada away from SAGD (steam assisted gravity drainage) each well to toe-end east side about one
A Quaternary Period river Q-Channel is developed at hundred meters.In the process of development, pass through the means such as time lapse seismic, temperature monitoring well
It was found that the steam of part SAGD steam injection well toe-end is excessive along pit shaft direction, the utilization rate of SAGD steam is not only reduced, while
So that the temperature anomaly of the partial region Q-Channel increases, certain threat is constituted to environment, violates Canada to Q-
The requirement of channel environmental protection.So that Nexen company is forced to close steam injection well or reduces steam injection well toe-end steam injection
Amount, affects the normal production of SAGD.
As it can be seen that whether monitoring the steam of SAGD steam injection well toe-end along the excessive right and wrong in pit shaft direction in SAGD development process
It is often important.Currently used monitoring method is whether bore a collection of monitoring well excessive to monitor steam, but which cost compared with
It is high and cannot accomplish quickly and effectively to predict.
Summary of the invention
In view of the above-mentioned problems, the object of the present invention is to provide it is a kind of at low cost and can accomplish quickly, be effectively predicted
The SAGD steam injection well toe-end steam judgment method excessive along pit shaft direction.
To achieve the above object, the present invention uses following technical scheme：A kind of SAGD steam injection well toe-end steam is along pit shaft side
To excessive judgment method, include the following steps：1) each prospect pit of subject oil field, evaluation are obtained using rock core information and well log interpretation
The reservoir fluid distribution pattern of Jing Chu, wherein reservoir fluid distribution pattern refers to the specific distribution situation of longitudinal Shang Shui, mud, oil；2)
On the basis of obtaining each prospect pit, evaluating the reservoir fluid distribution pattern of Jing Chu, according to earthquake information, the side of stochastic simulation is utilized
Method obtains the reservoir fluid distribution pattern in the oil field gamut；3) for the steam injection well toe-end reservoir item in every a pair of SAGD well
Part is judged：When the reservoir fluid distribution pattern of steam injection well toe-end is that " toe-end bores chance or toe-end top is shale layer+water layer
When integrated mode ", then judge that steam can be excessive along pit shaft direction.
The invention adopts the above technical scheme, which has the following advantages：1, the method for the invention passes through analysis
SAGD steam injection well toe-end reservoir fluid distribution pattern, can quickly, accurate judgement SAGD steam injection well toe-end steam whether can be substantially
Degree overflows outward along pit shaft direction.2, the present invention takes full advantage of existing rock core and well-log information, comes without newly-increased monitoring well
It whether excessive monitors steam, greatly reduces cost.3, the present invention has practical operable implementation steps, is applicable not only to oil
Sand SAGD developmental research field can also use and refer to for the related research field of other thermal recoveries, such as thick oil steam drive is opened
Hair etc..
Detailed description of the invention
Fig. 1 shows steam injection well toe-end top, there are shale layer+water layer integrated modes；
Fig. 2 indicates that steam injection well toe-end bores and meets shale layer+water layer integrated mode；
Fig. 3 indicates that there are inclined shale layer+water layer integrated modes on steam injection well toe-end top
Fig. 4 indicates that there are independent water layer modes on steam injection well toe-end top；
Fig. 5 indicates that there are independent mud stone layer models on steam injection well toe-end top；
Fig. 6 indicates that steam injection well toe-end top has independent hypertonic layer model.
Specific embodiment
The present invention is described in detail below with reference to the accompanying drawings and embodiments.
The invention proposes a kind of judgment methods that SAGD steam injection well toe-end steam is excessive along pit shaft direction, including following step
Suddenly：
1) the reservoir fluid distributed mode for obtaining each prospect pit of subject oil field using rock core information and well log interpretation, evaluating Jing Chu
Formula, wherein reservoir fluid distribution pattern refers to the specific distribution situation of longitudinal Shang Shui, mud, oil.
2) on the basis of obtaining each prospect pit, evaluating the reservoir fluid distribution pattern of Jing Chu, according to earthquake information, using with
The method of machine simulation obtains the reservoir fluid distribution pattern in the oil field gamut.
3) judged for the steam injection well toe-end reservoir conditions in every a pair of SAGD well：When the reservoir stream of steam injection well toe-end
When body distribution pattern is " toe-end bores chance or toe-end top is shale layer+water layer integrated mode " (as shown in Figs. 1-3), then judge
Steam can be excessive along pit shaft direction.
Judgment method of the present invention, the principle is as follows：According to theory analysis, reservoir engineering method research and Numerical-Mode
Quasi- technique study discovery, SAGD steam injection well toe-end steam need to meet following two condition along pit shaft direction is excessive simultaneously：
One, on SAGD steam injection well toe-end top, there are mudstone foundations
More liquid due to steam, if blocking without shale layer, steam is preferentially based on vertical rising.When there are mud
When rock stratum, since the permeability of shale layer is low compared with reservoir, the flow enhuancement of steam in the horizontal direction is forced, is SAGD steam injection well toe
Hold steam along the excessive condition that provides the foundation in pit shaft direction.But since steam still has certain seep in lower permeability
Thoroughly forthright, most of steam is still vertical rising, therefore steam is not along strong along the excessive degree in pit shaft direction.
Two, there are water layers below mudstone foundation
Water is the important medium for transmitting heat first, and the thermal coefficient of water is greater than the thermal coefficient of oil, when SAGD steam injection well
Toe-end is bored there are when water layer between chance or toe-end top and observation well, and steam increases along water layer rate extending transversely.In addition,
Since the mobility of water is greater than crude oil, after vapor chamber expands to water layer, water is quickly vented, and vapor chamber quickly occupies the position of water
It sets, to further be extended in the horizontal direction to toe-end, to cause excessive.
Therefore, SAGD steam injection well toe-end steam by along horizontal direction to the necessary condition that toe-end extends be toe-end bore meet or
There are the combinations of shale layer and water layer for person's upper part：Fig. 1-6 is illustrated with intuitive way, when the reservoir fluid point of toe-end
When cloth mode is any situation in Fig. 1-3, that is, it can determine whether that steam or heat can be along the combinations of shale layer and water layer along pit shaft
Direction is excessive, so that the temperature of the monitoring well in shale layer+water layer combination rises.And other modes are in, as Figure 4-Figure 6,
Then it cannot make toe-end steam excessive along pit shaft direction.
The various embodiments described above are merely to illustrate the present invention, and wherein the implementation steps etc. of method may be changed,
All equivalents and improvement carried out based on the technical solution of the present invention, should not exclude in protection scope of the present invention
Except.
Claims (1)
1. a kind of judgment method that SAGD steam injection well toe-end steam is excessive along pit shaft direction, includes the following steps：
1) the reservoir fluid distribution pattern for obtaining each prospect pit of subject oil field using rock core information and well log interpretation, evaluating Jing Chu,
In, reservoir fluid distribution pattern refers to the specific distribution situation of longitudinal Shang Shui, mud, oil；
2) on the basis of obtaining each prospect pit, evaluating the reservoir fluid distribution pattern of Jing Chu, according to earthquake information, random mould is utilized
Quasi- method obtains the reservoir fluid distribution pattern in the oil field gamut；
3) judged for the steam injection well toe-end reservoir conditions in every a pair of SAGD well：When the reservoir fluid point of steam injection well toe-end
When cloth mode is " toe-end bores chance or toe-end top is shale layer+water layer integrated mode ", then judge that steam can be along pit shaft direction
It is excessive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810775871.9A CN108868720A (en) | 2018-07-16 | 2018-07-16 | A kind of judgment method that SAGD steam injection well toe-end steam is excessive along pit shaft direction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810775871.9A CN108868720A (en) | 2018-07-16 | 2018-07-16 | A kind of judgment method that SAGD steam injection well toe-end steam is excessive along pit shaft direction |
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| Publication Number | Publication Date |
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| CN108868720A true CN108868720A (en) | 2018-11-23 |
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| CN201810775871.9A Pending CN108868720A (en) | 2018-07-16 | 2018-07-16 | A kind of judgment method that SAGD steam injection well toe-end steam is excessive along pit shaft direction |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345133A (en) * | 2014-09-22 | 2015-02-11 | 西南石油大学 | Numerical analysis method applied to leaking and channeling mechanism and prevention and control method of injection fluid |
| CN105044775A (en) * | 2015-09-14 | 2015-11-11 | 中国石油大学(华东) | Seismic fluid inversion identification method and apparatus |
| WO2017131850A1 (en) * | 2015-12-01 | 2017-08-03 | Conocophillips Company | Single well cross steam and gravity drainage (sw-xsagd) |
| CN108316905A (en) * | 2018-01-12 | 2018-07-24 | 中国石油天然气股份有限公司 | A method of inhibit SAGD vapor chambers longitudinally to advance by leaps and bounds |
-
2018
- 2018-07-16 CN CN201810775871.9A patent/CN108868720A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345133A (en) * | 2014-09-22 | 2015-02-11 | 西南石油大学 | Numerical analysis method applied to leaking and channeling mechanism and prevention and control method of injection fluid |
| CN105044775A (en) * | 2015-09-14 | 2015-11-11 | 中国石油大学(华东) | Seismic fluid inversion identification method and apparatus |
| WO2017131850A1 (en) * | 2015-12-01 | 2017-08-03 | Conocophillips Company | Single well cross steam and gravity drainage (sw-xsagd) |
| CN108316905A (en) * | 2018-01-12 | 2018-07-24 | 中国石油天然气股份有限公司 | A method of inhibit SAGD vapor chambers longitudinally to advance by leaps and bounds |
Non-Patent Citations (2)
| Title |
|---|
| 卢川 等: "高含水饱和度层对加拿大Kinosis油砂区双水平井SAGD开发的影响", 《科学技术与工程》 * |
| 陈元千 等: "《现代油藏工程》", 31 August 2001, 北京：石油工业出版社 * |
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Application publication date: 20181123 |
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