CN103806901B - The method of testing of oil well fast testing system - Google Patents
The method of testing of oil well fast testing system Download PDFInfo
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- CN103806901B CN103806901B CN201210441829.6A CN201210441829A CN103806901B CN 103806901 B CN103806901 B CN 103806901B CN 201210441829 A CN201210441829 A CN 201210441829A CN 103806901 B CN103806901 B CN 103806901B
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Abstract
The invention discloses a kind of oil well fast testing system and method for testing, test system includes sleeve pipe, under enter the test string of sleeve pipe, test string sealed bottom insulates, form obturator, formed the annular space between test string and oil well by hydraulic packer packing between test string and oil well, test string is provided with down-hole high-speed switch, memory-type pressure meter is installed bottom test string. The present invention is a kind of simple to operate and can realize down-hole and quickly produce the novel well testing system of changes in flow rate, switch can be opened at instantaneous (in 0.1s), form time and the discharge relation curve of rectangle, thus the problem solving the degree of depth and the degree of accuracy realizing test curve being difficult to test contaminated zone in well testing process.
Description
Technical field
The present invention relates to a kind of oil well fast testing system and method for testing, belong to the oil well Well Test Technology field of Oil-Gas Field Development Engineering.
Background technology
At present, Oil-Gas Field Development Engineering needs subsurface pressure is tested, and the method that oil and gas well testing is commonly used is well testing.
Well testing is to put into sensor in down-hole, carries out switch well, tests out pressure signal, i.e. the time dependent volume of data of pressure, then according to mathematical model reverse formation information.
Conventional oil well test, is switch at well head. But due to the impact of well bore storage effect, the elasticity on stratum is big, and the impact of test result is very big.
In order to exempt well bore storage effect well, existing a kind of technical method is that sensor is put into down-hole, then switchs in down-hole. But owing to hydraulic line is longer, opening and closing and need a process, passing time is slow, about 2 minutes. Although this mode is better than well head switch in the past, but to it is understood that the information of near wellbore zone not enough. Because in 2 minutes, formation wave through the near wellbore zone within 10m, just has a lot of important information not to be found, particularly contaminated zone already. And the contaminated zone degree of depth judge to we determine take acidifying, pressure break etc. solve depollution measure critically important. Further need exist for judging the situation in crack, near wellbore zone. During due to 2 minutes, pressure wave early passes through near wellbore zone, and cannot diagnose.
Summary of the invention
The technical issues that need to address of the present invention are that the defect overcoming prior art, it is provided that a kind of oil well fast testing system and method for testing, and it can open switch in instantaneous (0.1s), forms the square wave of flow and time relationship. Thus measuring formation information, the particularly information of contaminated zone near well, for taking acidifying or other stimulation of well to have directive significance later.
For solving the problems referred to above, the present invention adopts the following technical scheme that
The invention provides a kind of oil well fast testing system, including sleeve pipe, under enter the test string of sleeve pipe, test string sealed bottom insulates, form obturator, formed the annular space between test string and sleeve pipe by hydraulic packer packing between test string and sleeve pipe, test string is provided with down-hole high-speed switch, memory-type pressure meter is installed bottom test string.
Described down-hole high-speed switch includes switch urceolus, is provided with a current limliting tubule in switch urceolus, and described current limliting tubule top is connected with the annular space of sleeve pipe, is provided with Current limited Control device in current limliting tubule, by a diaphragm seal bottom current limliting tubule.
Or, described down-hole high-speed switch includes switch urceolus, it is provided with a current limliting tubule in switch urceolus, described current limliting tubule top is connected with the annular space of sleeve pipe, it is provided with Current limited Control device in current limliting tubule, a magnet ring, described magnet ring and a movable iron plate is installed bottom current limliting tubule and is connected, described movable iron plate seals bottom current limliting tubule, is provided with a limited block in the current limliting tubule above movable iron plate.
Hydraulic packer is pressurizeed by hydraulic line by ground hydraulic pump, it is achieved packing.
The present invention discloses oil well method for rapidly testing, particularly as follows:
In well testing process, test string is lowered into the reservoir position of certain depth by the first step; Before packing, pit shaft has fluid to be flowed out by annular space, and bottom pressure now is not too high, and when being 10Mpa such as strata pressure, the pressure in flow process only has 6Mpa;
Second step, during test, ground pressure pump is pressurizeed to packer by hydraulic line, and when reaching packing pressure, packer seals the annular space between test string and sleeve pipe;
3rd step, after packing, formation fluid can collect toward pit shaft continuously, and collecting pressure in process can gradually rise, for instance by 6Mpa rise to 10Mpa, then proceed to rise;
4th step, down-hole high-speed switch is opened; When force value rises to the fracture pressure of thin film, instantaneous film is completely severed; Thin film fully opens, and by Current limited Control device current limliting, flow is just the flow Q that current limliting tubule limits by 0 value mutation1, then fluid enters annular space;
Or, when switching base pressure and rising to the maximum pressure of magnet ring adsorpting iron plate, iron plate comes off, limited block restriction iron plate come off after position, fluid come off by iron plate after gap entrance tubule, Current limited Control device current limliting.
5th step, fluid enters annular space by current limliting tubule, and flow is by the flow Q that 0 value mutation is that current limliting tubule limits1, quickly realize changes in flow rate at instantaneous (in 0.1s), form time and the discharge relation curve of rectangle such that it is able to solve the degree of depth of contaminated zone near well and improve the degree of accuracy of well-test curve.
Finally, after test terminates, ground bleeds off pressure, and packing element shrinks deblocking, it is proposed to test string, reads the pressure data of test from memory-type pressure meter.
The down-hole high-speed switch of the present invention can open switch in instantaneous (0.1s), forms the square wave of flow and time relationship. Thus measuring formation information, the particularly information of contaminated zone near well, for taking acidifying or other stimulation of well to have directive significance later.
Thus, the present invention is a kind of simple to operate and can realize down-hole and quickly produce the novel well testing system of changes in flow rate, switch can be opened at instantaneous (in 0.1s), form time and the discharge relation curve of rectangle, thus the problem solving the degree of depth and the degree of accuracy realizing test curve being difficult to test contaminated zone in well testing process.
The present invention has the advantages that compared with the prior art
(1) thin-film material is applied in the design of down-hole switch, will realize opening with first few minutes, and shorten to and in 0.1s, quickly realize changes in flow rate, and form flow and the time curve of rectangle, reach expected test purpose, quickly take data.
(2) cost easy and simple to handle is low, and test process is without using the complex device such as cable.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram.
Fig. 2 is the high-speed switch profile described in the embodiment of the present invention 1.
Fig. 3 is the high-speed switch profile described in the embodiment of the present invention 2.
Fig. 4 is the flow and time history that use high-speed switch of the present invention, Normal hydraulic down-hole switch and conventional well head switch to record respectively.
Detailed description of the invention
Embodiment 1
As shown in Figure 1, the invention provides a kind of oil well fast testing system, including sleeve pipe 1, under enter the test string 2 of sleeve pipe, test string sealed bottom insulates, and forms obturator, is insulated the annular space 4 formed between test string and sleeve pipe between test string and sleeve pipe by hydraulic packer 3, hydraulic packer is pressurizeed by hydraulic line 6 by ground hydraulic pump 5, it is achieved packing. Test string is provided with down-hole high-speed switch 7, memory-type pressure meter 8 is installed bottom test string.
As shown in Figure 2, described down-hole high-speed switch includes switch urceolus 10, is provided with a current limliting tubule 11 in switch urceolus, and described current limliting tubule top is connected with the annular space of sleeve pipe, Current limited Control device 12 it is provided with, by a diaphragm seal 13 bottom current limliting tubule in current limliting tubule.
Embodiment 2
As shown in Figure 1, the invention provides a kind of oil well fast testing system, including sleeve pipe 1, under enter the test string 2 of sleeve pipe, test string sealed bottom insulates, and forms obturator, is insulated the annular space 4 formed between test string and sleeve pipe between test string and sleeve pipe by hydraulic packer 3, hydraulic packer is pressurizeed by hydraulic line 6 by ground hydraulic pump 5, it is achieved packing. Test string is provided with down-hole high-speed switch 7, memory-type pressure meter 8 is installed bottom test string.
As shown in Figure 3, described down-hole high-speed switch includes switch urceolus 10, it is provided with a current limliting tubule 11 in switch urceolus, described current limliting tubule top is connected with the annular space of sleeve pipe, it is provided with Current limited Control device 12 in current limliting tubule, a magnet ring 14, described magnet ring and a movable iron plate 15 is installed bottom current limliting tubule and is connected, described movable iron plate seals bottom current limliting tubule, is provided with a limited block 16 in the current limliting tubule above movable iron plate.
Hydraulic packer is pressurizeed by hydraulic line by ground hydraulic pump, it is achieved packing.
The down-hole high-speed switch of the present invention can open switch in instantaneous (0.1s), forms the square wave of flow and time relationship. Thus measuring formation information, the particularly information of contaminated zone near well, for taking acidifying or other stimulation of well to have directive significance later.
Embodiment 3 oil well method for rapidly testing
In well testing process, test string is lowered into the reservoir position of certain depth by the first step; Before packing, pit shaft has fluid to be flowed out by annular space, and bottom pressure now is not too high, and when being 10Mpa such as strata pressure, the pressure in flow process only has 6Mpa;
Second step, during test, ground pressure pump is pressurizeed to packer by hydraulic line, and when reaching packing pressure, packer seals the annular space between test string and sleeve pipe;
3rd step, after packing, formation fluid can collect toward pit shaft continuously, and collecting pressure in process can gradually rise, for instance by 6Mpa rise to 10Mpa, then proceed to rise;
4th step, down-hole high-speed switch is opened; When force value rises to the fracture pressure of thin film, instantaneous film is completely severed; Thin film fully opens, and by Current limited Control device current limliting, flow is just the flow Q that current limliting tubule limits by 0 value mutation1, then fluid enters annular space;
Or, when switching base pressure and rising to the maximum pressure of magnet adsorption iron plate, iron plate comes off, limited block restriction iron plate come off after position, fluid come off by iron plate after gap entrance tubule, Current limited Control device current limliting.
5th step, fluid enters annular space by current limliting tubule, and flow is by the flow Q that 0 value mutation is that current limliting tubule limits1, quickly realize changes in flow rate at instantaneous (in 0.1s), form time and the discharge relation curve of rectangle such that it is able to solve the degree of depth of contaminated zone near well and improve the degree of accuracy of well-test curve.
Finally, after test terminates, ground bleeds off pressure, and packing element shrinks deblocking, it is proposed to test string, reads the pressure data of test from memory-type pressure meter.
Fig. 4 is the flow and time history that use high-speed switch of the present invention, Normal hydraulic down-hole switch and conventional well head switch to record respectively. In Fig. 4,100 is the flow and time curve that use high-speed switch of the present invention to record, forms the square wave of flow and time relationship. 200 is the flow and time history that use Normal hydraulic down-hole switch to record, and 300 is the flow and time history that use conventional well head switch to record.
Last it is noted that obvious, above-described embodiment is only for clearly demonstrating example of the present invention, and is not the restriction to embodiment. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without also cannot all of embodiment be given exhaustive. And the apparent change thus amplified out or variation are still among protection scope of the present invention.
Claims (2)
1. the method for rapidly testing of an oil well fast testing system, it is characterized in that, described oil well fast testing system includes sleeve pipe, under enter the test string of sleeve pipe, test string sealed bottom insulates, and forms obturator, is formed the annular space between test string and sleeve pipe by hydraulic packer packing between test string and sleeve pipe, test string is provided with down-hole high-speed switch, memory-type pressure meter is installed bottom test string;
Described down-hole high-speed switch includes switch urceolus, is provided with a current limliting tubule in switch urceolus, and described current limliting tubule top is connected with the annular space of sleeve pipe, is provided with Current limited Control device in current limliting tubule, by a diaphragm seal bottom current limliting tubule;
Or, described down-hole high-speed switch includes switch urceolus, it is provided with a current limliting tubule in switch urceolus, described current limliting tubule top is connected with the annular space of sleeve pipe, it is provided with Current limited Control device in current limliting tubule, a magnet ring, described magnet ring and a movable iron plate is installed bottom current limliting tubule and is connected, described movable iron plate seals bottom current limliting tubule, is provided with a limited block in the current limliting tubule above movable iron plate;
Described method of testing comprises the following steps,
In well testing process, test string is lowered into the reservoir position of certain depth by the first step; Before packing, pit shaft has fluid to be flowed out by annular space, and when strata pressure is 10Mpa, the pressure in flow process is 6Mpa;
Second step, during test, ground pressure pump is pressurizeed to packer by hydraulic line, and when reaching packing pressure, packer seals the annular space between test string and sleeve pipe;
3rd step, after packing, formation fluid can collect toward pit shaft continuously, and collecting pressure in process can gradually rise, by 6Mpa rise to 10Mpa, then proceed to rise;
4th step, down-hole high-speed switch is opened; When force value rises to the fracture pressure of thin film, instantaneous film is completely severed; Thin film fully opens, and by Current limited Control device current limliting, flow is just the flow Q that current limliting tubule limits by 0 value mutation1, then fluid enters annular space;
Or, when switching base pressure and rising to the maximum pressure of magnet ring adsorpting iron plate, iron plate comes off, limited block restriction iron plate come off after position, fluid come off by iron plate after gap entrance tubule, Current limited Control device current limliting;
5th step, fluid enters annular space by current limliting tubule, and flow is by the flow Q that 0 value mutation is that current limliting tubule limits1, in instantaneous 0.1s, quickly realize changes in flow rate, form time and the discharge relation curve of rectangle such that it is able to solve the degree of depth of contaminated zone near well and improve the degree of accuracy of well-test curve;
Finally, after test terminates, ground bleeds off pressure, and packing element shrinks deblocking, it is proposed to test string, reads the pressure data of test from memory-type pressure meter.
2. the method for rapidly testing of oil well fast testing system as claimed in claim 1, it is characterised in that: hydraulic packer is pressurizeed by hydraulic line by ground hydraulic pump, it is achieved packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210441829.6A CN103806901B (en) | 2012-11-08 | 2012-11-08 | The method of testing of oil well fast testing system |
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| CN201210441829.6A CN103806901B (en) | 2012-11-08 | 2012-11-08 | The method of testing of oil well fast testing system |
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| CN103806901A CN103806901A (en) | 2014-05-21 |
| CN103806901B true CN103806901B (en) | 2016-06-08 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105443113A (en) * | 2014-08-29 | 2016-03-30 | 中国石油天然气股份有限公司 | Test string for gas storage |
| CN108590637A (en) * | 2018-05-02 | 2018-09-28 | 高原 | A kind of sucker rod pumping well downhole data pressure pulse transmitting device and method |
| CN108729906A (en) * | 2018-06-07 | 2018-11-02 | 西南石油大学 | A kind of hypotonic tight gas reservoir improvement backward modified isochronal test method |
| CN113216950B (en) * | 2021-06-21 | 2024-03-08 | 西安精实信石油科技开发有限责任公司 | Device and method for recognizing reservoir fluid through pressure response |
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| CN202900258U (en) * | 2012-11-08 | 2013-04-24 | 中国石油大学(北京) | Oilwell underpit pressure testing system |
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Patent Citations (9)
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|---|---|---|---|---|
| US4845494A (en) * | 1984-05-01 | 1989-07-04 | Comdisco Resources, Inc. | Method and apparatus using casing and tubing for transmitting data up a well |
| CN2117464U (en) * | 1991-12-29 | 1992-09-30 | 吉林油田扶余采油二厂 | Layer-yield profile and pressure sysnchronously surveying column |
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