CN1091493A - Low-discharge-capacity plug-retaining double-layer sand prevention method for plastic almond shell artificial well wall - Google Patents
Low-discharge-capacity plug-retaining double-layer sand prevention method for plastic almond shell artificial well wall Download PDFInfo
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- CN1091493A CN1091493A CN 93101919 CN93101919A CN1091493A CN 1091493 A CN1091493 A CN 1091493A CN 93101919 CN93101919 CN 93101919 CN 93101919 A CN93101919 A CN 93101919A CN 1091493 A CN1091493 A CN 1091493A
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- sand
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- sand control
- discharge capacity
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- 239000004576 sand Substances 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000004033 plastic Substances 0.000 title claims abstract description 15
- 229920003023 plastic Polymers 0.000 title claims abstract description 15
- 235000011437 Amygdalus communis Nutrition 0.000 title claims abstract description 14
- 241000220304 Prunus dulcis Species 0.000 title claims abstract description 14
- 235000020224 almond Nutrition 0.000 title claims abstract description 14
- 230000002265 prevention Effects 0.000 title abstract 6
- 238000010276 construction Methods 0.000 claims abstract description 37
- 238000007689 inspection Methods 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract 4
- 239000004570 mortar (masonry) Substances 0.000 claims description 18
- 238000005516 engineering process Methods 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 4
- 206010024453 Ligament sprain Diseases 0.000 claims description 3
- 208000010040 Sprains and Strains Diseases 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- 230000002950 deficient Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 19
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000003129 oil well Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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- Processing Of Solid Wastes (AREA)
Abstract
The invention relates to a low-displacement plug-retaining double-layer sand control method for a plastic almond shell artificial well wall, which adopts a construction process of low displacement, low pump pressure, low sand ratio and insufficient displacement and is assisted by a set of effective construction quality inspection method, and the quality of sand control is proved by using the method for inspection; and when the sand prevention quality is not good enough, performing supplementary sand prevention construction. The fine sand prevention process has reliable quality guarantee, can greatly improve the sand prevention strength, ensures that a complete artificial well wall is formed, and ensures that the sand prevention success rate is 100 percent.
Description
The present invention is a kind of new oil recovery technique, particularly oil, well artificial borehole wall sand control technique.
The loose sand oil reservoir is after putting into production, when producing pressure differential surpasses certain limit, just begin to shake out, have a strong impact on oil well production, present anti-sand method is that other liquid with crude oil or certain viscosity carries plastics and almond shell mortar and enters sand section, form artificial borehole wall, to reach the sand control purpose.Always, the technology that plastics artificial borehole wall sand control adopts is the big discharge capacity of a cover, high pump pressure, high sand ratio, the construction technology of excessive replacement, because this technology presses off the stratum often, partly mortar stitches the depths with entering, and in addition, the replacement amount is excessive in the construction, perforation borehole place does not have mortar, and this key position of passage that causes shaking out does not have the sand control barrier; And no quality examination program and method in the operation, construction effect is felt unsure of, and have problem also not have the way of remedying, thereby sand control is of poor quality, and success rate generally has only 50～75%, and wall strength generally only can be kept the oil well low-intensity and produce needs.
The objective of the invention is shortcoming at above-mentioned existing anti-sand method, study a kind of plastics and almond shell mortar of still using, but can fill up the formation sand production position, form and cover all sand control new technologies of the artificial borehole wall of the section of shaking out, and be aided with the effective construction quality inspection method of a cover, can verify the sand control quality good or not with the method, when the sand control quality is not good enough, assist and fill the sand control construction, can guarantee to form complete artificial borehole wall with this method.
The present invention takes low discharge capacity, low pump pressure, low sand ratio, the construction technology that the amount of owing replaces, and in construction, be aided with the effective quality inspection method of a cover, and verify quality in inspection and also replenish the sand control construction when not good enough, formed complete artificial borehole wall for extremely up to assurance.Parameters of construction technology of the present invention is as follows: discharge capacity is 0.1～1.5m
3/ minute, the normal construction pump pressure is 10～15MPa, sand is than (being plastics and almond shell mortar and the ratio of load fluid body) 3～20%(weight), mortar curing compound (hydrochloric acid solution) concentration is 3～8%(weight), circle, oil reservoir top is measured in the replacement of curing compound.
Before sand control construction, at first visit the sand face, bury oil reservoir sand washing at the bottom of the oil reservoir below the boundary 4～8 meters, and will mention more than the circle, oil reservoir top 20～100% on the oil pipe as sand.Stir plastics and almond shell mortar in advance, connect the construction pipeline, other increases backwash outlet line and tubing and casing one wing connecting pipeline.
The sand control construction sequence is as follows:
1, just squeezing prepad fluid, wash the borehole and the section of shaking out, pump pressure is put liquid to squeeze before the pressure break formation condition squeezes down.
2, just squeezing load fluid, than crowded load fluid, stopping to add sand above normal pressure 3～5MPa pressure that occurs spraining up to the construction pump pressure with low discharge capacity, low sand.
3, sprain to bear down on one and replace, under low discharge capacity, replace liquid, obviously sprain to press and just stop replacement up to the pump pressure 3～5MPa that rises again.
4, the clear water backwash is used in backwash, and pressure is controlled at 50～80% of normal construction pump pressure.
5, just replace: the replacement amount is the casing volume amount of operating tool string bottom to the top of oil horizon.
6, the sand control quality is checked in closing well initial set; Visited the mortar face with operating tool string in 8～16 hours behind the closing well, then sand control is qualified to surpass circle, oil reservoir top as the mortar face, but sand washing this moment is to the artificial bottom of a well; As verify the mortar face and do not cover in oil reservoir or the sand washing and to find that the oil reservoir position do not have real core stopper, then need to replenish sand control.
7, squeeze hydrochloric acid solution and make curing compound, the amount of squeezing is the twice of mortar amount, and then, closing well is waited and coagulated 24～48 hours, deepens the oil pipe backwash and goes out the residual acid of pit shaft.
8, do not surpass circle, oil reservoir top as verify the mortar face in the 6th step, judge that then sand control is defective, replenish sand control again.
9, replenishing sand control is with 0.1～0.2m
3/ minute low discharge capacity carry out once small-sized sand control construction again by the sand control construction sequence of front.
Advantage of the present invention be and in the past the sort of more extensive sand-preventing process relatively fine and smooth sand control program is arranged, reasonable technological parameter, quality assurance reliably can increase substantially the intensity of artificial borehole wall, guarantees that the sand control success rate is 100%.
Embodiment 1: certain oil well, and bore and open producing zone, produce oil began to shake out after three months, because sand holddown closing well adopts plastics and almond shell mortar, with old technology sand control, promptly use high pump pressure, big discharge capacity, big sand ratio, the method construction of excessive replacement does not have quality examination in the work progress.Only opening behind the sand control and taking out 4 days is holddown, the sand control failure.Stayed the plug double-layer anti-sand method to carry out sand control with the low discharge capacity of plastics and almond shell artificial borehole wall of the present invention afterwards, carried out sand control operational discharge capacity 0.1～0.9m by above-mentioned sand control construction sequence and technological parameter
3/ minute, sand is than 10%, and pump pressure 13～15MPa produced 281 days behind the sand control up till now, did not go wrong, and accumulative total produces oil 3724 tons, 2,980,000 yuan of wound benefits.
Embodiment 2, certain oil well, brill leaves blowing and produces pump production down after the stop-spraying after 3 years, find that after a blowout there is the reservoir sand that sprays from the shaft bottom in a large number in the well site, by the sand holddown, leakage is serious after 2 years, dashes not shake out and closing well, the back stays the plug double-layer anti-sand method to carry out sand control with the low discharge capacity of plastics and almond shell artificial borehole wall of the present invention, and construction parameter is discharge capacity 0.1～1.0m
3/ minute, sand is than 9～10%, and pump pressure 15MPa after construction, visits sand face inspection oil recovery section and whether stays plug, finds that the sand face does not bury the topmost oil reservoir, replenishes sand control again, with discharge capacity 0.1～0.5m
3/ minute, sand is than 10%, pump pressure 12MPa technological parameter.Construction proves to mend prevent successfully tripping out pipe once that following screw drill bores hole plug to the artificial bottom of a well, descends flow string to go into operation then again, and this well is to producing 197 days 5990 tons of accumulative total produce oils, 4,800,000 yuan of wound economic benefits now.
Claims (4)
1, the low discharge capacity of a kind of plastics and almond shell artificial borehole wall is stayed the plug double-layer anti-sand method, it is characterized in that: adopt low discharge capacity, low pump pressure, low sand ratio, the construction technology that the amount of owing replaces, and be aided with one the cover effective construction quality inspection method, verify the sand control quality good or not with the method inspection, when the sand control quality is not good enough, mend anti-construction;
Parameters of construction technology requires as follows: discharge capacity is 0.1～1.5m
3/ minute, normal construction pump pressure 10～15MPa, sand be than 3～20% (capacity), 95% of replacement amount hole volume; The concentration 3～8% (weight) of mortar curing compound hydrochloric acid solution, the replacement of curing compound are measured circle, oil reservoir top;
Construction sequence: 1, just squeezing the preflush borehole and the section of shaking out;
2, just squeezing load fluid, surpassing positive normal pressure 3～5MPa up to the construction pump pressure, occurring spraining pressing just stops to add sand;
3, sprain to bear down on one and replace, squeeze displacement fluid, rise 3～5MPa again to the pressure of obviously spraining, stop replacement up to pump pressure.
4, backwash, use the clear water backwash, pressure is controlled at 50～80% of normal construction pump pressure;
5, just replace, the replacement amount is the casing volume amount of operating tool string bottom to the top of oil horizon;
6, the sand control quality is checked in closing well initial set, visits the mortar face with operating tool string, and it is then qualified to surpass circle, oil reservoir top as the mortar face, but sand washing is to the artificial bottom of a well;
7, squeeze hydrochloric acid solution and make curing compound, the amount of squeezing is the twice of mortar amount, and closing well is waited and coagulated 24～48 hours, deepens the oil pipe backwash and goes out the residual acid of pit shaft;
8, do not surpass circle, oil reservoir top as verify the mortar face in the 6th step, judge that then sand control is defective, replenish sand control.
2, the low discharge capacity of plastics and almond shell artificial borehole wall according to claim 1 is stayed the plug double-layer anti-sand method, it is characterized in that described construction technology, and its operating tool string will be mentioned above 20～100 meters of circle, oil reservoir top.
3, the low discharge capacity of plastics and almond shell artificial borehole wall according to claim 1 is stayed the plug double-layer anti-sand method, it is characterized in that described construction technology, buries oil reservoir as sand before the sand control, sand surfing to arrive at the bottom of the oil reservoir below the boundary 4～8 meters.
4, the low discharge capacity of plastics and almond shell artificial borehole wall according to claim 1 is stayed the plug double-layer anti-sand method, it is characterized in that described additional anti-sand method is with 0.1～0.2m
3/ minute low discharge capacity carry out once small-sized sand control construction again by the sand control construction sequence of front.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93101919 CN1091493A (en) | 1993-02-26 | 1993-02-26 | Low-discharge-capacity plug-retaining double-layer sand prevention method for plastic almond shell artificial well wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93101919 CN1091493A (en) | 1993-02-26 | 1993-02-26 | Low-discharge-capacity plug-retaining double-layer sand prevention method for plastic almond shell artificial well wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1091493A true CN1091493A (en) | 1994-08-31 |
Family
ID=4983846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93101919 Pending CN1091493A (en) | 1993-02-26 | 1993-02-26 | Low-discharge-capacity plug-retaining double-layer sand prevention method for plastic almond shell artificial well wall |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1091493A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057814C (en) * | 1996-02-14 | 2000-10-25 | 胜利石油管理局井下作业公司 | Flushing filling anti-sand process technology |
| CN101532379B (en) * | 2009-02-07 | 2012-04-25 | 崔彦立 | Full-range sand-adding yield increase construction method for oil well |
-
1993
- 1993-02-26 CN CN 93101919 patent/CN1091493A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1057814C (en) * | 1996-02-14 | 2000-10-25 | 胜利石油管理局井下作业公司 | Flushing filling anti-sand process technology |
| CN101532379B (en) * | 2009-02-07 | 2012-04-25 | 崔彦立 | Full-range sand-adding yield increase construction method for oil well |
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