CN1125290A - Pressure pulse oscilation deblocking method - Google Patents
Pressure pulse oscilation deblocking method Download PDFInfo
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- CN1125290A CN1125290A CN 94119787 CN94119787A CN1125290A CN 1125290 A CN1125290 A CN 1125290A CN 94119787 CN94119787 CN 94119787 CN 94119787 A CN94119787 A CN 94119787A CN 1125290 A CN1125290 A CN 1125290A
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Abstract
The pressure pulse oscilation deblocking method uses the pipeline and equipment of well-flushing operation to alternatively apply the rated highest pressure action and rated lowest pressure action to the blocked formation by means of liquid. Its operation process includes the pressure-raising section, high-pressure retaining section, pressure-releasing section, and low-pressure retaining section, and those procedures are circularly implemented, so that the blocked material can be broken and pushed out from the formation by the action of pressure pulses.
Description
The present invention relates to from well producing oil, gas, water, solubilized and maybe can dissolve material or slurry of mineral, particularly in well or well, salvage or get rid of object.
The oil-producing well in oil field, after producing a period of time, because other materials in stratum or the well come together near the well head stratum or the borehole wall gradually and the hole on stratum are blocked, make oil stream not smooth, output descends or produce oil not, need carry out de-plugging this moment, common employed de-plugging way is that the down-hole is washed with flushing fluid or blockages relieving fluid, but flushing fluid circulates in well, and pressure can not be excessive, generally be that the circulation that can finish flushing fluid gets final product, so can only play flushing and chemical action to the borehole wall, but to leaning on the obstruction in the stratum slightly, then effect is not worked even not quite, therefore plugging removal effect is not good, especially on the borehole wall when accounting for well the formed borehole wall of mud, or other attachments are in case enter oil reservoir or be attached to the borehole wall, be difficult to remove, all can influence the output of oil from start to finish.
The purpose of this invention is to provide and a kind ofly utilize existing well washing equipment that the stratum of oil well is carried out that obstruction is removed in the pressure pulse vibration and the method for removing obstruction.
The objective of the invention is to realize by following technical scheme, pressure pulse oscilation deblocking method can utilize pipeline and the equipment or the special equipment of clean-out service, and one valve is housed at the loop exit of well, alternately boost and pressure release to stopping up the stratum by liquid, and obstruction is broken under the effect of pressure pulse and is pushed out the stratum and is taken out of and de-plugging by well, its concrete parameters relationship and operation sequence are as follows:
1. the section of boosting, make the pressure on stratum rise at short notice fixed maximum pressure;
2. high pressure keeps section, pressurize a period of time under deciding maximum pressure;
3. pressure release section, make the pressure on stratum reduce at short notice decide minimum pressure;
4. low pressure keeps section, in deciding minimum pressure pressurize a period of time;
5. by 1. above-mentioned-4. program circulates;
6. check, when keeping the section program at a certain high pressure, pressure rises to institute decide maximum pressure after, termination of pumping, whether inspection pressure descends, and as pressure decline, proves stratum " imbibition ", de-plugging is finished, and can carry out well-flushing, does not descend as pressure, then proceeds 1.-4. program.
Below in conjunction with drawings and Examples pressure pulse oscilation deblocking method of the present invention is described in detail.
Fig. 1 is the schematic diagram of the existing well washing equipment of pressure pulse oscilation deblocking method utilization of the present invention when carrying out the de-plugging operation;
Fig. 2 is the flow diagram of pressure pulse oscilation deblocking method of the present invention.
Fig. 1 shows the situation of utilizing existing well washing equipment to carry out the de-plugging operation with method for removing blockage of the present invention, has sleeve pipe 1 in the oil well, oil pipe 2, well head has production tree 3, blowout preventer 4, oil pipe 2 is hung by crane and is parked in certain position, and can carry out clean-out service this moment, also can carry out the de-plugging operation, can be by also carrying out de-plugging in the sleeve pipe by pumping into blockages relieving fluid in the oil pipe, Fig. 1 arrow is depicted as by pumping into blockages relieving fluid in the sleeve pipe 1 and by returning the operation that circulation is finished on ground in the oil pipe 2, when implementing de-plugging operation of the present invention, should have valve 5 in the outlet of pipeloop, valve 5 is closed, can make in the well and boost, valve 5 is opened, can make pressure release in the well.Oil pipe under the degree of depth depend on the needs, when can not de-plugging in some degree of depth or de-plugging undesirable, carry out again after can changing the degree of depth.
Pressure pulse oscilation deblocking method carries out according to following parameters relationship and program, as shown in Figure 2, and 1., 6 are the section of boosting, make borehole pressure rise to decide maximum pressure Pmax, the time is that The faster the better, 2., 7 are high pressure maintenance section, scavenging pump work, and make borehole pressure remain on decide maximum pressure Pmax, keep a period of time, preferably 2-3 minute, 3., 8 for the pressure release section, make in the well pressure reduce to decide minimum pressure Pmin, time also is short more good more, 4., 9 are that low pressure keeps section, make in the well pressure remain on decide minimum pressure Pmin, keep a period of time, preferably 2-3 minute, 5. by 1. above-mentioned-4. program cycle is boosted, step-down is in a certain program 2. the time, after for example carrying out 5-10 circulation, can keep section termination of pumping inspection at high pressure, 6., check section 10, if pressure descends after the termination of pumping, the proof stratum is " imbibition ", then can carry out well-flushing and produce oil operation, if pressure does not descend, illustrate that then formation blockage fails to remove, should proceed 1. above-mentioned-4. program.
Said to decide maximum pressure Pmax and deciding minimum pressure Pmin be different and different according to the condition of each well, and direct relevant with the size of strata pressure, no matter but strata pressure how, as the difference that makes Pmax and Pmin is greater than 30kg/cm
2The time, should be effectively with this method de-plugging, in general, decide maximum pressure Pmax and should equal strata pressure and add 20-100kg/cm
2, decide minimum pressure Pmin and should be lower than strata pressure 10kg/cm
2Below, promptly decide minimum pressure Pmin and subtract 10kg/cm less than strata pressure
2, this condition can be implemented for the high well of strata pressure, because of strata pressure greater than head of liquid in the well, but, then can't implement, so for the lower well of strata pressure for the lower well of strata pressure, it is that valve 5 is all opened that its Pmin picks and places sky, and the desirable Pmin30kg/cm that is higher than of its Pmax
2Pressure.
Method for removing blockage of the present invention, flushing fluid or blockages relieving fluid (being added with the dedicated liquid that oil reservoir is had the de-plugging agent of de-plugging effect) are boosted by instantaneous, pressure release and produce pressure oscillation, the formation blockage thing is being subjected under the percussion of pulse, reach the fatigue failure state or on attachment, get loose, the liquid stream that pressure oscillation obstruction again that these are broken or that get loose forms along with the vibration of pressure flows and sends the stratum, and pit shaft proposed along with next step well-flushing, therefore can effectively reach cleaning, the purpose of de-plugging, this method only need be utilized well washing equipment, can hocket with clean-out service, need not increase any equipment, be a kind of simple, feasible de-plugging measure, than de-plugging or other de-plugging measures of routine, every well can be saved more than 10,000 yuan.
Claims (4)
1, a kind of pressure pulse oscilation deblocking method is characterized in that by liquid alternately being boosted and pressure release in the stratum in well, and parameters relationship and program are as follows:
1. the section of boosting 6, and valve-off 5 makes in the shortest time that pressure rises to Pmax in the well;
2. high pressure keeps section 7, makes Pmax keep a period of time in well;
3. pressure release section 8 is opened valve 5, makes in the well pressure reduce to Pmin in the shortest time;
4. low pressure keeps section 9, makes Pmin keep a period of time in well;
5. by 1. above-mentioned-4. program repeats;
6. check section 10, when in a certain program 2. the time, pressure rises to termination of pumping behind the Pmax, checks whether pressure descends, and as descending, prove stratum " imbibition ", and de-plugging is finished, as not descending, and 1.-4. program of continuation then.
The difference of said Pmax and Pmin should be greater than 30kg/cm
2
2, method for removing blockage as claimed in claim 1 is characterized in that
The kg/cm of Pmax=strata pressure+(20-100)
2
Pmin≤strata pressure-10kg/cm
2
3, method for removing blockage as claimed in claim 1 is characterized in that the said section 10 of 6. checking carries out after 1.-4. program is carried out 5-10 time.
4, method for removing blockage as claimed in claim 1, it is characterized in that said program 2. high pressure keep section 7 and 4. low pressure to keep time of sections 9 be 2-3 minute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94119787 CN1125290A (en) | 1994-12-22 | 1994-12-22 | Pressure pulse oscilation deblocking method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94119787 CN1125290A (en) | 1994-12-22 | 1994-12-22 | Pressure pulse oscilation deblocking method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1125290A true CN1125290A (en) | 1996-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94119787 Pending CN1125290A (en) | 1994-12-22 | 1994-12-22 | Pressure pulse oscilation deblocking method |
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| CN (1) | CN1125290A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005111516A1 (en) * | 2004-05-13 | 2005-11-24 | Tsinghua Solar Ltd. | Glass vacuum heat pipe type solar heat collection pipe |
| CN102031945A (en) * | 2010-12-31 | 2011-04-27 | 谢晓峰 | Oil- water well blockage removal method and oil-water well blockage removal system |
| CN105201475A (en) * | 2015-09-21 | 2015-12-30 | 中国石油大学(北京) | High-energy-gathering repeated high-impulse-wave polymer injection well or oil well blockage removing method and device |
| CN105387994A (en) * | 2015-12-15 | 2016-03-09 | 西南石油大学 | Hydrate fidelity transport device and blockage relieving method thereof |
| CN118498956A (en) * | 2024-07-22 | 2024-08-16 | 西安坤瑞石油科技有限公司 | Continuous relay wave resonant pulse blocking removing device and method |
-
1994
- 1994-12-22 CN CN 94119787 patent/CN1125290A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2005111516A1 (en) * | 2004-05-13 | 2005-11-24 | Tsinghua Solar Ltd. | Glass vacuum heat pipe type solar heat collection pipe |
| CN102031945A (en) * | 2010-12-31 | 2011-04-27 | 谢晓峰 | Oil- water well blockage removal method and oil-water well blockage removal system |
| CN105201475A (en) * | 2015-09-21 | 2015-12-30 | 中国石油大学(北京) | High-energy-gathering repeated high-impulse-wave polymer injection well or oil well blockage removing method and device |
| CN105201475B (en) * | 2015-09-21 | 2019-04-05 | 中国石油大学(北京) | High cumulative repeats flash wave injection well or de-plugging of well method and apparatus |
| CN105387994A (en) * | 2015-12-15 | 2016-03-09 | 西南石油大学 | Hydrate fidelity transport device and blockage relieving method thereof |
| CN118498956A (en) * | 2024-07-22 | 2024-08-16 | 西安坤瑞石油科技有限公司 | Continuous relay wave resonant pulse blocking removing device and method |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |