CN109630093A - A kind of flow rate test method in oil reservoir logging - Google Patents
A kind of flow rate test method in oil reservoir logging Download PDFInfo
- Publication number
- CN109630093A CN109630093A CN201910054281.1A CN201910054281A CN109630093A CN 109630093 A CN109630093 A CN 109630093A CN 201910054281 A CN201910054281 A CN 201910054281A CN 109630093 A CN109630093 A CN 109630093A
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- Prior art keywords
- pressure
- flow
- pit shaft
- yield
- present
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
Abstract
A kind of flow rate test method in oil reservoir logging of the present invention, belongs to field of oil development, according to indicative curve expression formula: Q=J (Δ P)=J (PR‑Pwf).It is P by controlling Liquid output to obtain pit shaft stream pressurewf1、Pwf2When corresponding yield be respectively Q1、Q2.It is calculated by indicative curve expression formula to production capacity index J and strata pressure PR.Again by J and PRIn generation, returns to indicative curve expression formula and has just obtained pit shaft stream pressure PwfWith the relational expression of flow Q.The present invention is chosen by a series of measurement and parameter, so that the pressure of near wellbore and the yield on stratum or injection rate establish relationship, and has sought flow using pressure.Pressure and the relationship of flow can correct the accurate of to guarantee measurement of discharge at any time.Pressure gauge is seperated layer water injection and the essential instrument of seperated layer water injection, and it is to have obtained flow in the case where any instrument of no increases that the present invention, which utilizes pressure test flow, has saved cost, the operation is stable, reliably.
Description
[technical field]
The invention belongs to field of oil development, especially a kind of flow rate test method in oil reservoir logging.
[background technique]
Flow used in oil reservoir logging is in respect of turbine flowmeter, electromagnetic flowmeter, ultrasonic flowmeter, tagging stream
Meter and suspended body flowmeter etc..Due to being limited by size etc., at present these instruments have not been used in cable controlled separate layer recover the oil or
In seperated layer water injection.The flowmeter for being currently used for cable controlled separate layer water filling only has differential pressure flowmeter one kind.Differential pressure flowmeter exists
The problem of be to be easy to produce drift.In addition, in cable controlled separate layer oil recovery, there are no use flowmeter.Cable controlled separate layer note
Water and seperated layer water injection need the flowmeter that precision is high, stability is good, can work long hours.
[summary of the invention]
It is an object of the invention to overcome the above-mentioned prior art, a kind of flow survey in oil reservoir logging is provided
Method for testing accurately measures flow by easy method.
In order to achieve the above objectives, the present invention is achieved by the following scheme:
A kind of flow rate test method in oil reservoir logging, includes the following steps:
Step 1, fetching shows curve linear section, i.e. n=1；According to seepage theory, indicative curve expression formula is as follows:
Q=J (Δ P)n=J (PR-Pwf)n
Wherein, Q is yield or injection rate；J is productivity index；N is seepage index, 0.5≤n≤1；
Δ P is producing pressure differential；PRFor strata pressure；PwfFor pit shaft stream pressure；Obtain following formula:
Q=J (Δ P)=J (PR-Pwf)
Step 2, yield or injection rate Q are given and measures corresponding flow and pit shaft stream pressure, obtains two groups of corresponding datas, packet
Include Pwf1、Pwf2、Q1、Q2；
Step 3, it is calculated by difference:
Q1=J (Δ P1)=J (PR-Pwf1)
Q2=J (Δ P2)=J (PR-Pwf2)
Then,Substitution obtains:
Step 4, measurement pit shaft stream presses Pwf, obtain yield or injection rate Q:
Compared with prior art, the invention has the following advantages:
The present invention is chosen by a series of measurement and parameter, so that the pressure of near wellbore and the yield on stratum or injection
Amount establishes relationship, and has sought flow using pressure.Pressure and the relationship of flow can correct the flow measurement to guarantee at any time
That measures is accurate.Pressure gauge is seperated layer water injection and the essential instrument of seperated layer water injection, and the present invention utilizes pressure test flow, be
Flow has been obtained in the case where not increasing any instrument, has saved cost, it is the operation is stable, reliable.
[Detailed description of the invention]
Fig. 1 is the flow chart of the method for the present invention.
[specific embodiment]
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
It should be noted that term " includes " and " having " and their any deformation, it is intended that covering is non-exclusive
Include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to clearly arrange
Those of out step or unit, but may include be not clearly listed or it is solid for these process, methods, product or equipment
The other step or units having.
With reference to the accompanying drawing and particular experiment system and existing experimental result the present invention is further illustrated.
In cable controlled separate layer recovers the oil or seperated layer water injection is constructed, need to be separated oil reservoir with packer, each section all
Equipped with switch and pressure gauge.Ground instrument can read each pressure by the size of any one adjustable switch of cable
The data of power instrument.The present invention utilizes pressure, any one section of Liquid output can be tested out in separate-zone producer, in water injection well
In can test out any one section of injection rate, the specific method is as follows:
According to indicative curve expression formula: Q=J (Δ P)=J (PR-Pwf).Pit shaft stream is obtained by control yield or injection rate
Pressure is Pwf1、Pwf2When corresponding yield be respectively Q1、Q2.It is calculated by indicative curve expression formula to productivity index J and strata pressure
PR.Again by J and PRIn generation, returns to indicative curve expression formula and has just obtained pit shaft stream pressure PwfWith the relational expression of flow Q.
Embodiment 1
Each layer yield of oil production by layer well test: the well for implementing oil production by layer closes any one layer of switch and passes through survey
Measure pressure recovery, the strata pressure P of this available layerR.The switch of this layer is opened, individually when exploitation, available stream presses Pwf1
With corresponding production Q1.Then,
Q1=J (Δ P1)=J (PR-Pwf1)
When commingling production, the stream pressure P of this layer is measuredwf, available corresponding flow, the side of other each layers calculating flows
Method is identical.Therefore, by manual calculation or computer programming, it can be pressed by the stream of each layer and obtain their yield.
Embodiment 2
The verification of separate water injection well underground calculates each layer injection rate: when underground each layer be equipped with flowmeter (such as turbine flowmeter,
Differential pressure flowmeter) when, for each layer by the size of regulating switch, obtaining pit shaft stream pressure is Pwf1、Pwf2Corresponding injection rate
Q1、Q2.By formula:
It is obtained with the injection rate of this layer.The injection rate that calculation of pressure obtains can mutually be confirmed with other flows.It is special
It is not, when other flows break down, to remain to provide the water absorption of this layer by the present invention.
Embodiment 3
The verification of separate water injection well underground calculates each layer injection rate: when underground is not equipped with flowmeter or Causing Flowmeter Damages,
Turn off other water filling layers.Recording pit shaft stream pressure is Pwf1With corresponding ground injection rate Q1.Adjust this layer of down-hole switch size or
The size of floor switches is adjusted, record pit shaft stream presses Pwf2With corresponding ground injection rate Q2.Equally, by formula:
It is obtained with the injection rate of this layer.
The above content is further detailed description of the invention, and it cannot be said that a specific embodiment of the invention only
It is limited to this, for those of ordinary skill in the art to which the present invention belongs, without departing from the inventive concept of the premise, also
Several simple deduction or replace can be made, all shall be regarded as belonging to present invention guarantor determined by the appended claims
Protect range.
Claims (1)
1. a kind of flow rate test method in oil reservoir logging, which comprises the steps of:
Step 1, fetching shows curve linear section, i.e. n=1；According to seepage theory, indicative curve expression formula is as follows:
Q=J (Δ P)n=J (PR-Pwf)n
Wherein, Q is yield or injection rate；J is productivity index；N is seepage index, 0.5≤n≤1；
Δ P is producing pressure differential；PRFor strata pressure；PwfFor pit shaft stream pressure；Obtain following formula:
Q=J (Δ P)=J (PR-Pwf)
Step 2, yield or injection rate Q are given and measures corresponding flow and pit shaft stream pressure, obtains two groups of corresponding datas, including
Pwf1、Pwf2、Q1、Q2；
Step 3, it is calculated by difference:
Q1=J (Δ P1)=J (PR-Pwf1)
Q2=J (Δ P2)=J (PR-Pwf2)
Then,Substitution obtains:
Step 4, measurement pit shaft stream presses Pwf, obtain yield or injection rate Q:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054281.1A CN109630093A (en) | 2019-01-21 | 2019-01-21 | A kind of flow rate test method in oil reservoir logging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910054281.1A CN109630093A (en) | 2019-01-21 | 2019-01-21 | A kind of flow rate test method in oil reservoir logging |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109630093A true CN109630093A (en) | 2019-04-16 |
Family
ID=66061527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201910054281.1A Pending CN109630093A (en) | 2019-01-21 | 2019-01-21 | A kind of flow rate test method in oil reservoir logging |
Country Status (1)
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| CN (1) | CN109630093A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796719A (en) * | 2021-01-15 | 2021-05-14 | 大庆石油管理局有限公司 | Drilling and closing method for oil field encryption adjusting well |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508388A (en) * | 2002-12-19 | 2004-06-30 | 大庆油田有限责任公司 | Layering injection amount and layering pressure test-free storage direct-reading method |
| WO2012122470A1 (en) * | 2011-03-09 | 2012-09-13 | Prad Research And Development Limited | Method for charcterizing subsurface formations using fluid pressure response during drilling operations |
| CN105626036A (en) * | 2014-11-07 | 2016-06-01 | 中国石油化工股份有限公司 | Oil reservoir engineering calculation method for determining reasonable oil reservoir liquid yield |
-
2019
- 2019-01-21 CN CN201910054281.1A patent/CN109630093A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1508388A (en) * | 2002-12-19 | 2004-06-30 | 大庆油田有限责任公司 | Layering injection amount and layering pressure test-free storage direct-reading method |
| WO2012122470A1 (en) * | 2011-03-09 | 2012-09-13 | Prad Research And Development Limited | Method for charcterizing subsurface formations using fluid pressure response during drilling operations |
| CN105626036A (en) * | 2014-11-07 | 2016-06-01 | 中国石油化工股份有限公司 | Oil reservoir engineering calculation method for determining reasonable oil reservoir liquid yield |
Non-Patent Citations (2)
| Title |
|---|
| 崔树清等: "《钻井地质》", 31 January 2008 * |
| 李青等: "《机械采油技术管理方法》", 31 December 1994 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112796719A (en) * | 2021-01-15 | 2021-05-14 | 大庆石油管理局有限公司 | Drilling and closing method for oil field encryption adjusting well |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190416 |
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| RJ01 | Rejection of invention patent application after publication |