CN103775066A - Pressure difference test method applied to field of oil exploitation - Google Patents
Pressure difference test method applied to field of oil exploitation Download PDFInfo
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- CN103775066A CN103775066A CN201210422122.0A CN201210422122A CN103775066A CN 103775066 A CN103775066 A CN 103775066A CN 201210422122 A CN201210422122 A CN 201210422122A CN 103775066 A CN103775066 A CN 103775066A
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Abstract
The invention discloses a pressure difference test method applied to the field of oil exploitation. The pressure difference test method applied to the field of oil exploitation comprises the steps that (a) after a packer is sealed, the packer is still pressurized, and a middle pressure control valve is closed; (b) an upper pressure control valve is opened, an upper oil jacket annulus of a rubber barrel of the packer is pressurized to reach working pressure, the pressure is stabilized for 4-8 minutes, the packer is qualified if the pressure of an upper pressure gauge and the pressure of a middle pressure gauge are not decreased, otherwise, the step (b) is repeated; (c) a lower pressure control valve is opened, a lower oil jacket annulus of the rubber barrel of the packer is pressurized to reach working pressure, the pressure is stabilized for 3-7 minutes, the packer is qualified if the pressure of the middle pressure gauge and the pressure of a lower pressure gauge are not decreased, and if not, the packer is not effective. The pressure difference test method applied to the field of oil exploitation can successfully test the pressure difference in the process of oil exploitation and judge whether the pressure difference meets the requirements according to the test results, thereby laying a foundation for normal work of well drilling.
Description
Technical field
The present invention relates to a kind of pressure reduction method of testing that is applied to field of petroleum exploitation.
Background technology
Pressure reduction is the pressure difference of point-to-point transmission in system, the pressure difference of such as shaft bottom and well head, the pressure difference on both sides, aperture etc.
The most manual work that rely on of traditional oil pumping well detection and diagnosis mode complete, and by the mode of patrol, the manual critical data that gathers oil well work, then by calculating, or rule of thumb judges the working condition of oil well.This mode obviously cannot meet the active demand of oil field development.Current, the collection of well data, detection and diagnosis have become realizes the major reform target that digitlization oil field " cost efficiency " raises the management level, by setting up field produces monitoring diagnosis system, realize the real-time analysis transmission of pumpingh well data and the seamless link of information network, progressively form the information network of producing control integration, become the ideal solution of oilfield well network monitoring and Production scheduling management.
Downhole tool is that oilfield enterprise has bored workover treatment and carries out smoothly one of important guarantee.The downhole tool management of field produces enterprise has its uniqueness: production operation circumstance complication is changeable, and the behavior in service of downhole tool is also among continuous variation, and effective enforcement of having bored workover treatment depends on downhole tool in good working order; Downhole tool kind is many, it is wide to distribute, and wherein has a large amount of mobile downhole tools, the containing much information of management; Downhole tool value ratio is more expensive, help enterprise to carry out detection and the reparation of downhole tool, change the present situation in the past only detecting by artificial experience, strengthen to greatest extent the information system management of downhole tool in field produces enterprises, improve downhole tool service efficiency, can bring direct economic benefit for enterprise.
Downhole tool is the down-hole process pipe string important component part of oil field layered production practice, is divided three classes by function: packer class, control tool class, workover tool class.Seperated layer water injection is exactly in same a bite water injection well, utilize packer that multiple zone is divided into some intervals, in adding persistent erection, low-permeability oil-bearing stratum flooding, by adjusting the restriction loss of downhole choke, high permeability oil reservoir is controlled to water filling, enable keeping under the relatively stable water injection pressure of well head, high, medium and low permeability oil reservoir is a technological measure of energy water filling all.
Oil well pump, downhole tool (packer and injection well downhole flow regulator) are the nucleus equipments of oil recovery, water filling, and its quality good or not is most important for the normal production of oil-water well.Especially be oil recovery factory service as one, undertake that oil well pump, downhole tool detect, the grass-roots unit of repair, improve constantly repair rate, strengthening quality control and guarantee its outgoing qualified be the most important thing of work in every.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of pressure reduction method of testing that is applied to field of petroleum exploitation is provided, the method can successfully test out the pressure reduction in oil exploitation process, and judge pressure reduction by test result and whether satisfy the demands, thereby lay a good foundation for the normal work of drilling well.
Object of the present invention is achieved through the following technical solutions: be applied to the pressure reduction method of testing of field of petroleum exploitation, comprise the following steps:
(a) first, by packer carry out setting after, continue pressurization, and close middle pressure-controlled valve;
(b) open pressure-controlled valve, to packing element top oil jacket applied pressure by annulus to stipulating operating pressure, voltage stabilizing 4～8 minutes, upper, that middle pressure meter pressure is not reduced to is qualified, otherwise, re-start step (b);
(c) open and press down by-pass valve control, to packing element bottom oil jacket applied pressure by annulus to stipulating operating pressure, voltage stabilizing 3～7 minutes, in, that downforce meter pressure is not reduced to is qualified, otherwise packer lost efficacy.
In described step (b), the voltage stabilizing time is 6min.
In described step (c), the voltage stabilizing time is 5min.
In described step (b), make it be stable at 20～30MPa.
In described step (b), make it be stable at 25MPa.
In, that downforce meter pressure is not reduced to is qualified, proves that this packer is up-to-standard, can meet underground work needs; Occur pressure meter ANOMALOUS VARIATIONS, three gauge hands fluctuate up and down, and stable rear reading is consistent, prove the complete upper and lower oil jacket annular space of packing of packing element, that is: packer steel part cannot bear high pressure distortion or packer leakage, causes tubing and casing to be communicated with, packer inefficacy.
In sum, the invention has the beneficial effects as follows: can successfully test out the pressure reduction in oil exploitation process, and judge pressure reduction by test result and whether satisfy the demands, thereby lay a good foundation for the normal work of drilling well.
The specific embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
The pressure reduction method of testing that is applied to field of petroleum exploitation the present invention relates to, comprises the following steps:
(a) first, by packer carry out setting after, continue pressurization, and close middle pressure-controlled valve;
(b) open pressure-controlled valve, to packing element top oil jacket applied pressure by annulus to stipulating operating pressure, voltage stabilizing 4～8 minutes, upper, that middle pressure meter pressure is not reduced to is qualified, otherwise, re-start step (b);
(c) open and press down by-pass valve control, to packing element bottom oil jacket applied pressure by annulus to stipulating operating pressure, voltage stabilizing 3～7 minutes, in, that downforce meter pressure is not reduced to is qualified, otherwise packer lost efficacy.
In described step (b), the voltage stabilizing time is 6min.
In described step (c), the voltage stabilizing time is 5min.
In described step (b), make it be stable at 20～30MPa.
In described step (b), make it be stable at 25MPa.
In, that downforce meter pressure is not reduced to is qualified, proves that this packer is up-to-standard, can meet underground work needs; Occur pressure meter ANOMALOUS VARIATIONS, three gauge hands fluctuate up and down, and stable rear reading is consistent, prove the complete upper and lower oil jacket annular space of packing of packing element, that is: packer steel part cannot bear high pressure distortion or packer leakage, causes tubing and casing to be communicated with, packer inefficacy.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction, every foundation technical spirit of the present invention, and any simple modification, equivalent variations that above embodiment is done, within all falling into protection scope of the present invention.
Claims (6)
1. the pressure reduction method of testing that is applied to field of petroleum exploitation, is characterized in that, comprises the following steps:
(a) first, by packer carry out setting after, continue pressurization, and close middle pressure-controlled valve;
(b) open pressure-controlled valve, to packing element top oil jacket applied pressure by annulus to stipulating operating pressure, voltage stabilizing 4～8 minutes, upper, that middle pressure meter pressure is not reduced to is qualified, otherwise, re-start step (b);
(c) open and press down by-pass valve control, to packing element bottom oil jacket applied pressure by annulus to stipulating operating pressure, voltage stabilizing 3～7 minutes, in, that downforce meter pressure is not reduced to is qualified, otherwise packer lost efficacy.
2. the pressure reduction method of testing that is applied to field of petroleum exploitation according to claim 1, is characterized in that, in described step (b), the voltage stabilizing time is 6min.
3. the pressure reduction method of testing that is applied to field of petroleum exploitation according to claim 1, is characterized in that, in described step (c), the voltage stabilizing time is 5min.
4. the pressure reduction method of testing that is applied to field of petroleum exploitation according to claim 1, is characterized in that, in described step (b), makes it be stable at 20～30MPa.
5. the pressure reduction method of testing that is applied to field of petroleum exploitation according to claim 1, is characterized in that, in described step (b), makes it be stable at 25MPa.
6. the pressure reduction method of testing that is applied to field of petroleum exploitation according to claim 1, is characterized in that, in, that downforce meter pressure is not reduced to is qualified, proves that this packer is up-to-standard, can meet underground work needs; Occur pressure meter ANOMALOUS VARIATIONS, three gauge hands fluctuate up and down, and stable rear reading is consistent, prove the complete upper and lower oil jacket annular space of packing of packing element, that is: packer steel part cannot bear high pressure distortion or packer leakage, causes tubing and casing to be communicated with, packer inefficacy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210422122.0A CN103775066A (en) | 2012-10-17 | 2012-10-17 | Pressure difference test method applied to field of oil exploitation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210422122.0A CN103775066A (en) | 2012-10-17 | 2012-10-17 | Pressure difference test method applied to field of oil exploitation |
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| Publication Number | Publication Date |
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| CN103775066A true CN103775066A (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210422122.0A Pending CN103775066A (en) | 2012-10-17 | 2012-10-17 | Pressure difference test method applied to field of oil exploitation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343584A (en) * | 2020-11-03 | 2021-02-09 | 中国石油天然气股份有限公司 | Pressure working barrel for external channeling of horizontal well inspection pipe and verification method thereof |
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2012
- 2012-10-17 CN CN201210422122.0A patent/CN103775066A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343584A (en) * | 2020-11-03 | 2021-02-09 | 中国石油天然气股份有限公司 | Pressure working barrel for external channeling of horizontal well inspection pipe and verification method thereof |
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Application publication date: 20140507 |