CN101955763A - High pressure-resistant leak stoppage agent and leak stoppage slurry containing same - Google Patents
High pressure-resistant leak stoppage agent and leak stoppage slurry containing same Download PDFInfo
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- CN101955763A CN101955763A CN2010101724182A CN201010172418A CN101955763A CN 101955763 A CN101955763 A CN 101955763A CN 2010101724182 A CN2010101724182 A CN 2010101724182A CN 201010172418 A CN201010172418 A CN 201010172418A CN 101955763 A CN101955763 A CN 101955763A
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Abstract
The invention relates to a high pressure-resistant leak stoppage agent and leak stoppage slurry containing the same. The high pressure-resistant leak stoppage agent consists of the following components in percentage by mass: 25.0 to 27.0 percent of soybean particles, 31.0 to 32.0 percent of walnut shell flour, 7.1 to 7.5 percent of vermiculite, 2.1 to 2.5 percent of peanut hull meal, 22.0 to 22.5 percent of cement and 10.0 to 11.0 percent of flocculation coating agent LHB-105 for drilling fluid. The leak stoppage slurry consists of base slurry and the high pressure-resistant leak stoppage agent, wherein 3 to 9 grams of high pressure-resistant leak stoppage agent is added into every 100 milliliters of base slurry. The leak stoppage agent and the leak stoppage slurry stop leaking by combining chemical leak stoppage with particle bridging leak stoppage, so that the technical problems of aperture leak, crack leak and fracture leak under a well can be solved. The leak stoppage agent and the leak stoppage slurry are suitable for severe well leakage caused by a pore formation, a crack formation, a long-section broken formation and the like and can be applied to leak layer construction of which the leak position is difficultly determined.
Description
Technical field
The plugging agent that the present invention relates to use in the oil exploration drilling, particularly a kind of anti-high pressure plugging agent and contain the leak stopping slurry of described anti-high pressure plugging agent.
Background technology
All exist leakage to some extent in China's oil/gas drilling process, particularly even more serious when fissured formation creeps into.Therefore must implement effective drilling well leakproof, leakage stopping technology, be patching materials and implement the indispensable basic substance of this technology.Most widely used general, lower-cost patching materials is the bridge joint leak stopping at present.Conventional bridge joint blocking method is at the scene in the implementation process, the leak stopping success ratio is 40%～60% only, and analyze its reason and mainly contain the following aspects: 1. drop ply crack openings size is big, and the patching materials particle diameter is little, particularly the hard particle materials particle diameter is little, is difficult to build bridge in the crack form bridging plug.2. the crack openings size is little, during the bridge joint leak stopping, the macrobead material forms the phenomenon of sealing up a door at crack mouth place, having hindered smaller material enters, form bridging plug, blocked on the surface, but in follow-up wellbore construction because of drilling tool collision, liquid stream wash away, make a trip draw extensions, under the suction that pulls out of hole etc. acts on, the macrobead material of sealing up a door breaks away from the crack mouth, and leakage once more takes place.
So in drilling engineering, sometimes because can not accurately grasp the fracture width and the pore dimension on leakage stratum, can't preferred and definite plugging agent prescription, thus increased the uncertainty of successful construction, reduced the leak stopping success ratio.And because the existence of more patching materials, not only cause the too high of viscosity and be unfavorable for pumping, the actual application value of forfeiture site operation, and cause the increase of on-the-spot labour intensity.
Summary of the invention
For this reason, technical problem to be solved by this invention is to provide a kind of anti-high pressure plugging agent that can solve the property leakage of slit, down-hole, fractured leakage and tomography leakage, and a kind of leak stopping slurry that contains described anti-high pressure plugging agent is provided.
For solving the problems of the technologies described above, the present invention is achieved through the following technical solutions: a kind of anti-high pressure plugging agent, described anti-high pressure plugging agent is made up of with flocculation coating agent LHB-105 soya bean particle, walnut shell flour, vermiculite, peanut hull meal, cement and drilling fluid, and the quality percentage composition is: the soya bean particle is 25.0～27.0%, walnut shell flour is 31.0～32.0%, vermiculite is 7.1～7.5%, peanut hull meal is 2.1～2.5%, cement is 22.0～22.5%, drilling fluid is 10.0～11.0% with the coating agent LHB-105 that flocculates.
Above-mentioned anti-high pressure plugging agent, soya bean particle are 26%, walnut shell flour is 31.5%, vermiculite is 7.3%, peanut hull meal is 2.3%, cement is 22.3%, drilling fluid is 10.6% with flocculation coating agent LHB-105.
Above-mentioned anti-high pressure plugging agent, described soya bean particle, described walnut shell flour, described vermiculite and described peanut hull meal are all more than or equal to 10 orders.
Above-mentioned anti-high pressure plugging agent, described vermiculite is the 10-20 order.
Above-mentioned anti-high pressure plugging agent, described peanut hull meal is the 15-20 order.
A kind of leak stopping slurry that contains above-mentioned anti-high pressure plugging agent, described leak stopping slurry is made up of base slurry and described anti-high pressure plugging agent, and the described anti-high pressure plugging agent of adding in per 100 milliliters of base slurries is the 3-9 gram.
A kind of leak stopping slurry that contains above-mentioned anti-high pressure plugging agent, described leak stopping slurry is made up of described anti-high pressure plugging agent, compound leakage stop agent FDJ, drill-feeding plugging agent SDL and base slurry, calculate with the add-on in per 100 milliliters of base slurries: described anti-high pressure plugging agent is that 3-9 gram, described compound leakage stop agent are the 5-9 gram, and described drill-feeding plugging agent is the 3-6 gram.
Above-mentioned leak stopping slurry, calculate with the add-on in per 100 milliliters of base slurries: described anti-high pressure plugging agent is that 4 grams, described compound leakage stop agent FDJ are 6 grams, and described drill-feeding plugging agent SDL is 5 grams.
Above-mentioned leak stopping slurry, calculate with the add-on in per 100 milliliters of base slurries: described anti-high pressure plugging agent is that 3 grams, described compound leakage stop agent FDJ are 9 grams, and described drill-feeding plugging agent SDL is 3 grams.
Above-mentioned leak stopping slurry, calculate with the add-on in per 100 milliliters of base slurries: described anti-high pressure plugging agent is that 4 grams, described compound leakage stop agent FDJ are 5 grams, and described drill-feeding plugging agent SDL is 6 grams.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) the anti-high pressure plugging agent of the present invention has adopted chemical plugging and the method that the bridge joint leak stopping combines, and is a kind of compound chemical gel, compares with single chemical gel or single bridge joint plugging agent, and higher blocking ability and bearing capacity are arranged; Gelation time is adjustable, and gelation time can be controlled by the dosage of regulating linking agent according to the downhole temperature difference in the scene; Can miss the size of severity and leakage channel opening size and the composite use of bridge joint plugging agent of different-grain diameter according to the down-hole, improve leak stopping success ratio and plugging effect; In three leak stopping, show good plugging effect, all disposable success of preceding twice leak stopping, twice success of constructing for the third time, average disposable leak stopping success ratio reaches 75%.(2) the anti-high pressure plugging agent of the present invention is by different polymkeric substance and the multiple granulometric composition that works build bridge support, dilatational strain, adopt the chemical plugging leak stopping that combines with the leak stopping of particle bridge joint, belong to the novel resistance to compression plugging agent that a kind of polymer class agglomerative method is controlled leakage.Indoor evaluation shows, the anti-high pressure plugging agent of the present invention has certain shear thinning behavior, visco-elasticity and high compression strength, the time that forms gel is adjustable, and can be according to the situation of drop ply, the allotment granular size, reach the effect of shutoff, be applicable to the serious leakage that porosity stratum, fissured formation, long section broken formation etc. cause, and can be used for the bad definite drop ply construction of leak position.(3) the anti-high pressure plugging agent of the present invention can solve the anti-high pressure plugging agent of the property leakage of slit, down-hole, fractured leakage and tomography leakage, remedy other plugging agent build bridge, defective on crosslinked; Under the situation of anti-high pressure leakage, reach effect and environment protecting preferably.
Description of drawings
Fig. 1 is the influence of the anti-high pressure plugging agent of the present invention dosage to gel time;
Fig. 2 is the influence of temperature to the anti-high pressure plugging agent of the present invention gel time.
Embodiment
Embodiment 1 (anti-high pressure plugging agent performance evaluation of the present invention)
The anti-high pressure plugging agent of present embodiment is made up of with flocculation coating agent LHB-105 soya bean particle, walnut shell flour, vermiculite, peanut hull meal, cement and drilling fluid, the quality percentage composition is: 10 purpose soya bean particles 26%, 10 purpose walnut shell flours 31.5%, 10 purpose vermiculites 7.3%, 10 purpose peanut hull meals 2.3%, cement 22.3% and drilling fluid prepare anti-high pressure plugging agent with the ratio of flocculation coating agent LHB-10510.6%, carry out following performance evaluation after the mixing and stirring:
1. multiviscosisty experiment
This experiment is carried out on grout multiviscosisty instrument, need be static because of experiment, and adopt the method for surveying a denseness every two hours to experimentize, the multiviscosisty experimental formula is as follows:
1#:6% the anti-high pressure plugging agent of aquation slope soil paste+3% (6% aquation slope soil paste represent in per 100 ml waters to add the base that 6 gram slope soil, aquation form after 24 hours and starch; 3% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 3 grams in per 100 milliliters of base slurries);
2#:6% the anti-high pressure plugging agent of aquation slope soil paste+4% (6% aquation slope soil paste represent in per 100 ml waters to add the base that 6 gram slope soil, aquation form after 24 hours and starch; 4% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 4 grams in per 100 milliliters of base slurries);
3#:6% the anti-high pressure plugging agent of aquation slope soil paste+5% (6% aquation slope soil paste represent in per 100 ml waters to add the base that 6 gram slope soil, aquation form after 24 hours and starch; 5% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 5 grams in per 100 milliliters of base slurries);
4#:6% the anti-high pressure plugging agent of aquation slope soil paste+6% (6% aquation slope soil paste represent in per 100 ml waters to add the base that 6 gram slope soil, aquation form after 24 hours and starch; 6% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 6 grams in per 100 milliliters of base slurries);
5#:5% the anti-high pressure plugging agent of aquation slope soil paste+6% (5% aquation slope soil paste represent in per 100 ml waters to add the base that 5 gram slope soil, aquation form after 24 hours and starch; 6% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 6 grams in per 100 milliliters of base slurries);
6#:6% not the anti-high pressure plugging agent of aquation slope soil paste+5% (6% not aquation slope soil paste represent in per 100 ml waters to add the bases slurry that 6 gram slopes soil form; 5% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 5 grams in per 100 milliliters of base slurries);
7#:6% not the anti-high pressure plugging agent of aquation slope soil paste+6% (6% not aquation slope soil paste represent in per 100 ml waters to add the bases slurry that 6 gram slopes soil form; 6% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 6 grams in per 100 milliliters of base slurries);
8#:6% not the anti-high pressure plugging agent of aquation slope soil paste+7% (6% not aquation slope soil paste represent in per 100 ml waters to add the bases slurry that 6 gram slopes soil form; 7% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 7 grams in per 100 milliliters of base slurries);
9#:6% not the anti-high pressure plugging agent of aquation slope soil paste+8% (6% not aquation slope soil paste represent in per 100 ml waters to add the bases slurry that 6 gram slopes soil form; 8% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 8 grams in per 100 milliliters of base slurries);
10#:8% not the anti-high pressure plugging agent of aquation slope soil paste+5% (8% not aquation slope soil paste represent in per 100 ml waters to add the bases slurry that 8 gram slopes soil form; 5% anti-high pressure plugging agent is represented to add the anti-high pressure plugging agent of 5 grams in per 100 milliliters of base slurries).
Experimental result is as shown in table 1:
Table 1 multiviscosisty experimental result
From table 1 data as can be seen, the leak stopping slurry denseness that has just prepared illustrates that this slurry has good pumpability between 10～25BC.The anti-high pressure plugging agent of the present invention can be formed with the gelinite of a fixed structure in 4h in aquation slope soil paste, in aquation slope soil paste not, also can form gelinite in 16h, when slope soil content reaches 7%～8%, can form gelinite in 4h.(annotate: the meeting about 50BC of general denseness forms colloid, and the denseness of 6# is along with the increase denseness increase of time is little, and it is little to form the colloidal possibility in 16h, so the necessity that does not have continuation down to do basically; 7# too.Along with gel has appearred in the increase 8# of clay content and resistance to compression plugging agent dosage, that 9# gel that also is bound to occur, 10# gel just occurred at 6h.)
2. normal temperature current downflow experiment
Experimental technique and the instrument when surveying the grout degree of mobilization adopted in experiment.Experimental technique: the truncated cone circle mould of certain specification is placed on the sheet glass of horizontal positioned, the slurry that stirs is injected rapidly in the truncated cone circle mould, use doctor blade, truncated cone circle mould is mentioned by vertical direction, appoint slurry on sheet glass, to flow, to 30 seconds, measure the maximum diameter of trickling part mutually perpendicular both direction with ruler, average as the degree of mobilization of slurry.Experimental data sees Table 2:
Table 2 degree of mobilization experimental data
Annotate: the implication of table 2 prescription to the table 7, with " 4% base slurry+4% anti-high pressure plugging agent " is the example explanation: add the base slurry of 4 gram slope soil, aquation formation in 24 hours in per 100 ml waters of 4% basic slurry expression, 4% anti-high pressure plugging agent represents that adding 4 in per 100 milliliters of base slurries restrains anti-high pressure plugging agent.
From experimental data as can be seen, under the situation that the leak stopping slurry has just configured, degree of mobilization is better, under certain differential pressure action, can enter the stratum, and along with the increase of time, degree of mobilization slowly reduces, and forms gelinite at last and stops up drop ply.
3. temperature and dosage are to forming the influence of gel time
Because dosage and temperature are bigger to the influence of crosslinking reaction, therefore investigated the anti-high pressure plugging agent of novel anti high pressure plugging agent forms gel under different dosages, differing temps situation time, as depicted in figs. 1 and 2, in Fig. 1, X-coordinate is represented the dosage of anti-high pressure plugging agent, and ordinate zou is represented the time; In Fig. 2, X-coordinate is represented temperature, and ordinate zou is represented the time.By Fig. 1 and Fig. 2 as can be known, with the dosage of anti-high pressure plugging agent and the increase of temperature, gelling is shortened gradually, the immobilising gel of final formation, and plugging agent at high temperature also can form gelinite, when carrying out plugging operations, and the time that can form by adjustment control gelling to its dosage.
4. pressure-bearing experiment
(1) bearing capacity under the differing temps
This The effects the bearing capacity of plugging agent after the maintenance of differing temps section, pressure-bearing experiment is to make pressing machine by oneself with instrument.The pressure-bearing experimental technique: the 500g sand of in cup, packing into (20～40 order), gently with the casting bed Zhenping, pour ready leak stopping slurry then into, be forced into required pressure, timing 30min surveys filter loss.Experimental data sees Table 3:
Table 3 differing temps is to the influence of bearing capacity
From experimental data as can be seen, this plugging agent bearing capacity can reach more than the 10MPa, and can form high-intensity screen layer, improves the bearing capacity on stratum.
(2) time of repose is to the influence of bearing capacity
In numerous patching materialss, owing to soak for a long time in drilling fluid, a lot of patching materialss have all been lost the leak stopping ability, and indoor by plugging agent is estimated its bearing capacity under different time of repose, evaluation result is as shown in table 4 below:
Table 4 time of repose is to the influence of bearing capacity
From experimental data as can be seen, along with the increase of time, because the crosslinked polymer effect, its bearing capacity strengthens gradually, can improve the success ratio of leak stopping greatly.
5. the gel experiment in different densities base slurry
This The effects add the gel time in heavy sizing of plugging agent at different densities, experimental data sees Table 5:
The gel time of table 5 different densities
From experimental data as can be seen, anti-high pressure plugging agent at the sample pulp density greater than 1.5g/cm
3The time, fluidity of slurry is poor, is unfavorable for site pumping, at basic pulp density smaller or equal to 1.5g/cm
3The time, can satisfy the site operation requirement.
6. the experiment of the gel under the 200r/m rotating speed
In order further to understand the gel situation of plugging agent, the spy investigates its gel situation under the rotating speed of 200r/m, and experimental data sees the following form 7:
Gel situation under the rotating speed of table 7200r/m
From experimental data as can be seen, leak stopping is starched under whipped state, can not form gel, stir around less than ground can form gel.Therefore, when constructing at the scene, the preparation of leak stopping slurry must stir.
Certain well bores on December 31st, 2006 and reaches well cementation well depth 4190m, drills through the well reaming under the band centralizer after the electrical measurement, and reaming begins leakage (drilling fluid density 1.50g/cm to well depth 3887.10m
3), on average leak fast 24m
3/ h continues to draw to well depth 3890.48m, and well head loses and returns, and pulls out of hole to join the leak stopping of leak stopping slurry.
Join the leak stopping slurry as required, the described anti-high pressure plugging agent of adding in per 100 milliliters of basic slurries is that 4 gram %, the described compound leakage stop agent FDJ of adding are that 6 grams, the described drill-feeding plugging agent SDL of adding are 5 grams.Described anti-high pressure plugging agent is made up of with flocculation coating agent LHB-105 soya bean particle, walnut shell flour, vermiculite, peanut hull meal, cement and drilling fluid, the quality percentage composition is: 10 purpose soya bean particles 26%, 10 purpose walnut shell flours 31.5%, 10 purpose vermiculites 7.3%, 10 purpose peanut hull meals 2.3%, cement 22.3% and drilling fluid prepare mixing and stirring with the ratio of flocculation coating agent LHB-10510.6%.
Be drilled into leak position down again, squeeze into above-mentioned leak stopping slurry 40m
3, inject drilling fluid 40m
3(on average leak fast 28.8m
3/ h), work being drilled into well depth 1997.14m circulation observation, leak fast 10.2m
3/ h, leakage drilling fluid 5.1m
3Back leakage stops.Under bore reaming to shaft bottom circulation and do not leak the disposable success of leak stopping.
Certain well is drilled into well depth 3499.67m and is hampered turn on pump circulation reaming, drilling fluid density 1.42g/cm under 08 day December in 2006
3Because more serious well slough appears in the down-hole, reaming is very difficult.Collapse under the control well, drilling fluid density is brought up to 1.46g/cm
3After, a section reaming is found leakage to well depth 3724.30m, and the continuation reaming is to well depth 3729.50m, and well head loses and returns, and pulls out of hole to join the leak stopping of leak stopping slurry.
Join the leak stopping slurry as required, the described anti-high pressure plugging agent of adding in per 100 milliliters of basic slurries is that 3 grams, the described compound leakage stop agent FDJ of adding are that 9 grams, the described drill-feeding plugging agent SDL of adding are 3 grams.Described anti-high pressure plugging agent is made up of with flocculation coating agent LHB-105 soya bean particle, walnut shell flour, vermiculite, peanut hull meal, cement and drilling fluid, the quality percentage composition is: 10 purpose soya bean particles 25.5%, 10 purpose walnut shell flours 31%, 10 purpose vermiculites 7.5%, 10 purpose peanut hull meals 2.5%, cement 22.5% and drilling fluid prepare mixing and stirring with the ratio of flocculation coating agent LHB-10511%.
Following drill finish bar is annotated leak stopping slurry 40m to well depth 3570.09m
3, leak fast 38.5m
3/ h rises to casing shoe, and circulation is observed, and leaks fast 13.8m
3/ h, closing well are just squeezing drilling fluid 0.6m
3, the upright pressure drops to 1.5MPa by 2.0MPa, pulls out of hole and waits stifled 8 hours, and closing well is clamp-oned drilling fluid 1.6m
3(the upright pressure drops to 0.7MPa by 2.2MPa).Under be drilled into well depth 3712.09m, circulation is observed aftereffect, leaks fast 2.6m
3/ h.Trip-out bit change, following brill reaming to the shaft bottom (well depth 3988.56m) circulation do not leak, recover to creep into the disposable success of leak stopping.
Certain well arrives shaft bottom (4190m) in the two centralizer drifting reamings of band on January 9th, 2007, and drilling fluid density is progressively brought up to 1.54g/cm
3(control well slough), short distance rise and are drilled into well depth 3596.50m, and leakage when circulation is observed is leaked fast 20m
3/ h pulls out of hole and joins the leak stopping of leak stopping slurry.
Join the leak stopping slurry as required, the described anti-high pressure plugging agent of adding in per 100 milliliters of basic slurries is that 4 grams, the described compound leakage stop agent FDJ of adding are that 5 grams, the described drill-feeding plugging agent SDL of adding are 6 grams.Described anti-high pressure plugging agent is made up of with flocculation coating agent LHB-105 soya bean particle, walnut shell flour, vermiculite, peanut hull meal, cement and drilling fluid, the quality percentage composition is: 40 purpose soya bean particles 26.5%, 30 purpose walnut shell flours 32.3%, 20 purpose vermiculites 7.1%, 15 purpose peanut hull meals 2.1%, cement 22.0% and drilling fluid prepare mixing and stirring with the ratio of flocculation coating agent LHB-10510.0%.
Following drill finish bar is annotated leak stopping slurry 47m to well depth 3596.50m
3, replace into drilling fluid 34m
3, rise and be drilled into well depth 1980.05m, hang drilling fluid charge 40.7m
3Well head is discontented.Trip-out elicites static liquid level well depth 38m.Under be drilled into well depth 3540.83m, inject leak stopping slurry 43m
3, for drilling fluid 25.5m
3, work being drilled into well depth 1979.91m circulation observation, on average leak fast 3.0m
3/ h divides five closing wells to be co-extruded into drilling fluid 3.4m later on
3, well head voltage stabilizing 0.7MPa.Under drill through and do not leak, the leak stopping success.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification 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 need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (10)
1. anti-high pressure plugging agent, it is characterized in that, described anti-high pressure plugging agent is made up of with flocculation coating agent LHB-105 soya bean particle, walnut shell flour, vermiculite, peanut hull meal, cement and drilling fluid, and the quality percentage composition is respectively: the soya bean particle is 25.0～27.0%, walnut shell flour is 31.0～32.0%, vermiculite is 7.1～7.5%, peanut hull meal is 2.1～2.5%, cement is 22.0～22.5%, drilling fluid is 10.0～11.0% with the coating agent LHB-105 that flocculates.
2. anti-high pressure plugging agent according to claim 1 is characterized in that, the soya bean particle is 26%, walnut shell flour is 31.5%, vermiculite is 7.3%, peanut hull meal is 2.3%, cement is 22.3%, drilling fluid is 10.6% with flocculation coating agent LHB-105.
3. anti-high pressure plugging agent according to claim 1 is characterized in that described soya bean particle, described walnut shell flour, described vermiculite and described peanut hull meal are all more than or equal to 10 orders.
4. anti-high pressure plugging agent according to claim 3 is characterized in that described vermiculite is the 10-20 order.
5. anti-high pressure plugging agent according to claim 3 is characterized in that described peanut hull meal is the 15-20 order.
6. a leak stopping slurry that contains the arbitrary described anti-high pressure plugging agent of claim 1 to 5 is characterized in that, described leak stopping slurry is made up of base slurry and described anti-high pressure plugging agent, and the described anti-high pressure plugging agent of adding in per 100 milliliters of base slurries is the 3-9 gram.
7. a leak stopping that contains the arbitrary described anti-high pressure plugging agent of claim 1 to 5 is starched, it is characterized in that, described leak stopping slurry is made up of described anti-high pressure plugging agent, compound leakage stop agent FDJ, drill-feeding plugging agent SDL and base slurry, calculate with the add-on in per 100 milliliters of base slurries: described anti-high pressure plugging agent is that 3-9 gram, described compound leakage stop agent are the 5-9 gram, and described drill-feeding plugging agent is the 3-6 gram.
8. leak stopping slurry according to claim 7 is characterized in that, calculates with the add-on in per 100 milliliters of base slurries: described anti-high pressure plugging agent is that 4 grams, described compound leakage stop agent FDJ are 6 grams, and described drill-feeding plugging agent SDL is 5 grams.
9. leak stopping slurry according to claim 7 is characterized in that, calculates with the add-on in per 100 milliliters of base slurries: described anti-high pressure plugging agent is that 3 grams, described compound leakage stop agent FDJ are 9 grams, and described drill-feeding plugging agent SDL is 3 grams.
10. leak stopping slurry according to claim 7 is characterized in that, calculates with the add-on in per 100 milliliters of base slurries: described anti-high pressure plugging agent is that 4 grams, described compound leakage stop agent FDJ are 5 grams, and described drill-feeding plugging agent SDL is 6 grams.
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| CN102251756A (en) * | 2011-06-22 | 2011-11-23 | 中国石油集团川庆钻探工程有限公司 | Mountain flour plugging method |
| CN102287162A (en) * | 2011-05-09 | 2011-12-21 | 白银有色集团股份有限公司 | Small fault leakage blocking method in drill hole |
| CN102653673A (en) * | 2012-01-05 | 2012-09-05 | 中国石油天然气股份有限公司 | Biodegradable temporary plugging additive |
| CN104046345A (en) * | 2013-03-13 | 2014-09-17 | 中国石油天然气股份有限公司 | Petroleum engineering fiber composite pressure-bearing leak-stopping liquid and preparation method |
| CN111058796A (en) * | 2019-11-25 | 2020-04-24 | 西南石油大学 | Method for improving shale gas well oil layer casing well cementation quality |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102287162A (en) * | 2011-05-09 | 2011-12-21 | 白银有色集团股份有限公司 | Small fault leakage blocking method in drill hole |
| CN102251756A (en) * | 2011-06-22 | 2011-11-23 | 中国石油集团川庆钻探工程有限公司 | Mountain flour plugging method |
| CN102251756B (en) * | 2011-06-22 | 2014-01-01 | 中国石油集团川庆钻探工程有限公司 | Mountain flour plugging method |
| CN102653673A (en) * | 2012-01-05 | 2012-09-05 | 中国石油天然气股份有限公司 | Biodegradable temporary plugging additive |
| CN104046345A (en) * | 2013-03-13 | 2014-09-17 | 中国石油天然气股份有限公司 | Petroleum engineering fiber composite pressure-bearing leak-stopping liquid and preparation method |
| CN111058796A (en) * | 2019-11-25 | 2020-04-24 | 西南石油大学 | Method for improving shale gas well oil layer casing well cementation quality |
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