CN102604613B - Oil-based ultrafine cement paste and production method thereof - Google Patents
Oil-based ultrafine cement paste and production method thereof Download PDFInfo
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- CN102604613B CN102604613B CN 201210062571 CN201210062571A CN102604613B CN 102604613 B CN102604613 B CN 102604613B CN 201210062571 CN201210062571 CN 201210062571 CN 201210062571 A CN201210062571 A CN 201210062571A CN 102604613 B CN102604613 B CN 102604613B
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Abstract
An oil-based ultrafine cement paste consists of ultrafine cement, diesel oil and oil-soluble surfactant which are calculated according to per cubic meter of diesel oil, and the oil-based ultrafine cement paste contains 1.5 to 3.0 tons of ultrafine cement and 3 to 10 kilograms of oil-soluble surfactant; and the ultrafine cement consists of 50 to 70 percent of cement with the grain size distribution of 10Mu m to 15Mu m and 30 to 50 percent of cement with the grain size distribution of 30Mu m to 35Mu m. Since the grain size distributions of the ultrafine cement in the oil-based ultrafine cement paste disclosed by the invention are in two intervals, the oil-based ultrafine cement paste not only can enter deep formation pores to selectively block water, but also can be applied in formations with complex pore size distribution. Ultrafine gypsum powder can be added in the oil-based ultrafine cement paste disclosed by the invention as well, so that the volume of a solidified cement block can be kept unshrunk under the circumstance that the strength of the ultrafine cements is kept, moreover, by controlling the sequence of adding the oil-soluble surfactant and water-soluble surfactant, the ultrafine cements can be uniformly distributed, and the dewatering effect is remarkable.
Description
Technical field
The present invention relates to the plugging agent in a kind of oil production, specifically is that a kind of oil base superfine cement for selective water shut-off is starched and preparation method thereof, belongs to technical field of petroleum extraction.
Background technology
In the oilfield water extraction process because water and oil phase compole are not affine, so current advance by leaps and bounds or the local water transition process in be easy to form water mobile state before oil phase, water appears to the obstruction of oil phase, cause the oilfield exploitation water outlet and not fuel-displaced.In order to address this problem, improve oilfield water extraction efficient, in the prior art, technique means commonly used is water blockoff, namely stops up the passage that water flows, and forms new oil flow channel, thereby guarantees that oil phase can flow out from non-water stream channel.
In the practice, water-plugging technology is divided into non-selective water blockoff and selective water shut-off usually, and non-selective water blockoff is that all passages are all stopped up; Selective water shut-off refers to that then plugging agent only forms obstruction at water stream channel, does not stop up at oil flow channel.When the profit hierarchy of layer is clearly demarcated, can carry out the shutoff construction at water layer, when the profit layering was indeterminate, for avoiding stopping up oil reservoir, best bet was selective water shut-off.Normally used selective water shutoff agent is that polymer adds tensio-active agent, linking agent etc., and the main deficiency of its existence is that obstruction intensity is low, and the life-span is short, and plugging agent breaks glue or the material of the back generation of degrading can move, and causes secondary to stop up probably.
In addition, because the underground water channel volume is huge, carry out degree of depth water blockoff and need lot of materials, so construction cost is one of key factor of the necessary water blockoff feasibility of considering, consider this point, cement is desirable low cost, high strength water shutoff material, but conventional cement granules is bigger, can not enter the formation pore deep; And solidifying of cement do not have selectivity, and namely it can solidify to any stratum, so will form permanent plugging after the preparation grout is clamp-oned the stratum, can not be used for selective water shut-off.Therefore, prior art employing superfine cement is made into the oil base grout and carries out selective water shut-off, a kind of oil base superfine cement slurry selectivity blocking agent is disclosed as " oilfield chemistry " (the 17th rolls up March 25 2000 the 1st phase), oil base superfine cement slurry is made up of superfine cement, additive, diesel oil, the grain diameter of described superfine cement more than 90% is less than 7.8um, maximum particle diameter is 15um, and described additive OW-1 is composite by a certain percentage by oil soluble surfactant and water soluble surfactant active.This oil base superfine cement slurry has selective water shut-off effect preferably, and water plugging rate is up to 90%, and oil plugging rate has reached the requirement of selectively blocking off less than 30%.
But, when above-mentioned technology uses the superfine cement slurry to carry out selective water shut-off, the cement particle diameter is between 7.8um-15 um, in oilfield exploitation, the stratal configuration complexity, the deep hole often varies, when running into the stratal configuration of aperture, stratum wider distribution, the superfine cement particle diameter of above-mentioned particle diameter between 7.8-15um is too little, can not reach good plugging effect.And cement can produce volumetric shrinkage when solidifying, and causes the obstruction in duct not sternly, makes the water plugging effect of some well undesirable.On the other hand, above-mentioned technology adopts oil soluble surfactant and the composite oil base cement additire OW-1 that obtains of water soluble surfactant active, using the purpose of oil soluble surfactant is to make superfine cement have good dispersiveness in diesel oil, and the purpose of using the water soluble surfactant active is de-oiling and solidify water blockoff fast when making oil base superfine cement slurry meet water in the stratum.But, use oil soluble surfactant and water soluble surfactant active that the effect of tensio-active agent is cancelled each other to a certain extent simultaneously, its hydrophilic and effect oleophylic all can reduce, and is difficult to reach simultaneously the effect that not only cement is uniformly dispersed but also can fast dewatering.
Summary of the invention
Technical problem to be solved by this invention is in the prior art that because the earth formation deep hole often varies, conventional cement granules is bigger, can not enter the formation pore depths when using grout to carry out selective water shut-off; And superfine cement often can not adapt to the wideer bad ground place of pore size distribution, thus provide a kind of can be by the be coupled oil base superfine cement slurry of the good selective water shut-off performance of having of composite realization of particle diameter.
The technical problem that the present invention also will solve simultaneously is available technology adopting oil soluble surfactant and the composite oil base cement additire that obtains of water soluble surfactant active, its hydrophilic and effect oleophylic has cancelling each other to a certain degree, be difficult to reach simultaneously and not only cement be evenly distributed but also the significant effect of dehydrating effect, thereby a kind of strict control oil soluble surfactant and water soluble surfactant active's interpolation sequencing is provided, can guarantees that superfine cement has the oil base superfine cement slurry of good affinity, dispersity in diesel oil.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of oil base superfine cement slurry comprises superfine cement, diesel oil, oil soluble surfactant, and described each raw material is counted by every cubic metre of diesel oil:
Contain described superfine cement 1.5-3.0 ton, contain described oil soluble surfactant 3-10 kilogram;
Described superfine cement is that the size distribution of the cement of 10-15um and 30%-50% is that the cement of 30-35um is formed by the size distribution of 50%-70%.
Described oil base superfine cement slurry, every cubic metre of diesel oil contains 2 tons of described superfine cements, contains described oil soluble surfactant 5-6 kilogram.
Described oil base superfine cement slurry, every cubic metre of diesel oil contains 3 tons of described superfine cements, contains described oil soluble surfactant 8-10 kilogram.
Described oil base superfine cement slurry, every cubic metre of diesel oil also contains the ultra-fine terra alba that 25-30 kilogram size distribution is 15-30um.
Described oil soluble surfactant is one or more in anhydrous sorbitol list olein, polyoxyethylene sorbitan mono laurate fat, the glyceryl monostearate.
Described oil base superfine cement slurry comprises that also water soluble surfactant active, described water soluble surfactant active count every cubic metre of diesel oil by diesel oil and contain described water soluble surfactant active 5-8 kilogram.
Described water soluble surfactant active is one or both in alkylphenol polyoxyethylene, the fatty alcohol-polyoxyethylene ether.
The making method of described oil base superfine cement slurry comprises the steps:
The size distribution that takes by weighing specified quantitative is that 10-15um superfine cement, size distribution are superfine cement, diesel oil, oil soluble surfactant, ultra-fine terra alba, the water soluble surfactant active of 30-35um, and is stand-by;
Diesel oil, oil soluble surfactant are added in the container successively, it is mixed;
The mixture of superfine cement or superfine cement and ultra-fine terra alba is added in the diesel oil and oil soluble surfactant that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud;
Described water soluble surfactant active is joined fully in the mixing mud after disperseing, and stirring gets final product.
The making method of described oil base superfine cement slurry comprises the steps:
The size distribution that takes by weighing specified quantitative is that 10-15um superfine cement, size distribution are superfine cement, diesel oil, oil soluble surfactant, the ultra-fine terra alba of 30-35um, and is stand-by;
Diesel oil, oil soluble surfactant are added in the container successively, it is mixed;
The mixture of superfine cement or superfine cement and ultra-fine terra alba is added in the diesel oil and oil soluble surfactant that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Technique scheme of the present invention has the following advantages compared to existing technology:
(1) particle diameter that superfine cement has two scopes in the oil base superfine cement slurry of the present invention, wherein, particle diameter be 10-15um account for cement total amount 50%-70%, particle diameter be 30-35um account for cement total amount 30%-50%, after the superfine cement of above-mentioned two particle size distribution ranges is puddled, composite by above-mentioned two particle diameters coupling, thereby make the whole size distribution of superfine cement be bimodal shape, the superfine cement that this particle diameter is formed can guarantee that described oil base superfine cement slurry enters the formation pore depths and carries out selective water shut-off, can also have good plugging effect again when the wider distribution of aperture, stratum.
(2) add ultra-fine terra alba in the oil base superfine cement slurry of the present invention, the micro-expansibility when utilizing gypsum sets, the block that can guarantee to the cement solidifies under the situation that guarantees superfine cement intensity is long-pending not to be shunk, and makes water plugging effect better.
(3) oil base superfine cement slurry of the present invention in the preparation, interpolation order by strictness control oil soluble surfactant and water soluble surfactant active, namely adding oil soluble surfactant earlier makes superfine cement fully realize glossy wetting, and assurance superfine cement: diesel oil=(1.5-3.0): the 1(weight/volume) under the condition, slurries have good flowability; After described superfine cement is dispersed in the diesel oil fully, add water soluble surfactants again and make when the oil base grout is met water in the stratum de-oiling fast and solidifying, thereby superfine cement is evenly distributed, and dehydrating effect is remarkable.
Description of drawings
Content of the present invention is easier clearly to be understood in order to make, and below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the size distribution figure that the superfine cement of oil base superfine cement slurry of the present invention records with laser particle analyzer.
Embodiment
Embodiment 1:
The size distribution that takes by weighing 0.8 ton is 10-15um superfine cement, the 0.7 ton of size distribution superfine cement that is 30-35um, 1 cubic metre of diesel oil, 3 kg of oil soluble surfactants anhydrous sorbitol list oleins, and is stand-by;
Diesel oil, anhydrous sorbitol list olein are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and anhydrous sorbitol list olein that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Embodiment 2:
The size distribution that takes by weighing 1.5 tons is 10-15um superfine cement, the 1.5 tons of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 10 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, and is stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Embodiment 3:
The size distribution that takes by weighing 1.4 tons is 10-15 um superfine cement, the 0.6 ton of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 5 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, and is stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Embodiment 4:
The size distribution that takes by weighing 1.4 tons is 10-15 um superfine cement, the 0.6 ton of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 6 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, and is stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Embodiment 5:
The size distribution that takes by weighing 1.8 tons is 10-15 um superfine cement, the 1.2 tons of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 8 kg of oil soluble surfactants glyceryl monostearates, and is stand-by;
Diesel oil, glyceryl monostearate are added in the container successively, it is mixed;
Superfine cement is added diesel oil and the glyceryl monostearate that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Embodiment 6:
The size distribution that takes by weighing 0.8 ton is 10-15um superfine cement, the 0.7 ton of size distribution superfine cement that is 30-35um, 1 cubic metre of diesel oil, 3 kg of oil soluble surfactants anhydrous sorbitol list oleins, 25 kilograms of size distribution are the ultra-fine terra alba of 15-30um, and are stand-by;
Diesel oil, anhydrous sorbitol list olein are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and anhydrous sorbitol list olein that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Embodiment 7:
The size distribution that takes by weighing 1.5 tons is 10-15um superfine cement, the 1.5 tons of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 10 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 30 kilograms of size distribution are the ultra-fine terra alba of 15-30um, and are stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Embodiment 8:
The size distribution that takes by weighing 1.4 tons is 10-15 um superfine cement, the 0.6 ton of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 5 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 26 kilograms of size distribution are the ultra-fine terra alba of 15-30um, and are stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Embodiment 9:
The size distribution that takes by weighing 1.4 tons is 10-15 um superfine cement, the 0.6 ton of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 6 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 27 kilograms of size distribution are the ultra-fine terra alba of 15-30um, and are stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Embodiment 10:
The size distribution that takes by weighing 1.8 tons is 10-15 um superfine cement, the 1.2 tons of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 8 kg of oil soluble surfactants glyceryl monostearates, 29 kilograms of size distribution are the ultra-fine terra alba of 15-30um, and are stand-by;
Diesel oil, glyceryl monostearate are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and glyceryl monostearate that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Embodiment 11:
The size distribution that takes by weighing 0.8 ton is 10-15um superfine cement, the 0.7 ton of size distribution superfine cement that is 30-35um, 1 cubic metre of diesel oil, 3 kg of oil soluble surfactants anhydrous sorbitol list oleins, 5 kg water soluble surfactants alkylphenol polyoxyethylene, stand-by;
Diesel oil, anhydrous sorbitol list olein are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and anhydrous sorbitol list olein that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Described alkylphenol polyoxyethylene is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 12:
The size distribution that takes by weighing 1.5 tons is 10-15um superfine cement, the 1.5 tons of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 10 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 8 kg water soluble surfactants fatty alcohol-polyoxyethylene ether, stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Described fatty alcohol-polyoxyethylene ether is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 13:
The size distribution that takes by weighing 1.4 tons is 10-15 um superfine cement, the 0.6 ton of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 5 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 6 kg water soluble surfactants fatty alcohol-polyoxyethylene ether are stand-by, stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Described fatty alcohol-polyoxyethylene ether is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 14:
The size distribution that takes by weighing 1.4 tons is 10-15 um superfine cement, the 0.6 ton of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 6 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 7 kg water soluble surfactants alkylphenol polyoxyethylene, stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Described alkylphenol polyoxyethylene is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 15:
The size distribution that takes by weighing 1.8 tons is 10-15 um superfine cement, the 1.2 tons of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 8 kg of oil soluble surfactants glyceryl monostearates, 5 kg water soluble surfactants alkylphenol polyoxyethylene, stand-by;
Diesel oil, glyceryl monostearate are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and glyceryl monostearate that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
Described alkylphenol polyoxyethylene is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 16:
The size distribution that takes by weighing 0.8 ton is 10-15um superfine cement, the 0.7 ton of size distribution superfine cement that is 30-35um, 1 cubic metre of diesel oil, 3 kg of oil soluble surfactants anhydrous sorbitol list oleins, 25 kilograms of size distribution are the ultra-fine terra alba of 15-30um, 8 kg water soluble surfactants alkylphenol polyoxyethylene, stand-by;
Diesel oil, anhydrous sorbitol list olein are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and anhydrous sorbitol list olein that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Described alkylphenol polyoxyethylene is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 17:
The size distribution that takes by weighing 1.5 tons is 10-15um superfine cement, the 1.5 tons of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 10 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 30 kilograms of size distribution are the ultra-fine terra alba of 15-30um, 5 kg water soluble surfactants fatty alcohol-polyoxyethylene ether, stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Described fatty alcohol-polyoxyethylene ether is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 18:
The size distribution that takes by weighing 1.4 tons is 10-15 um superfine cement, the 0.6 ton of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 5 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 26 kilograms of size distribution are the ultra-fine terra alba of 15-30um, 8 kg water soluble surfactants fatty alcohol-polyoxyethylene ether, stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Described fatty alcohol-polyoxyethylene ether is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 19:
The size distribution that takes by weighing 1.4 tons is 10-15 um superfine cement, the 0.6 ton of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 6 kg of oil soluble surfactants polyoxyethylene sorbitan mono laurate fat, 27 kilograms of size distribution are the ultra-fine terra alba of 15-30um, 7 kg water soluble surfactants fatty alcohol-polyoxyethylene ether, stand-by;
Diesel oil, polyoxyethylene sorbitan mono laurate fat are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and polyoxyethylene sorbitan mono laurate fat that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Described fatty alcohol-polyoxyethylene ether is joined fully in the mixing mud after disperseing, and stirring gets final product.
Embodiment 20:
The size distribution that takes by weighing 1.8 tons is 10-15 um superfine cement, the 1.2 tons of size distribution superfine cement that is 30-35 um, 1 cubic metre of diesel oil, 8 kg of oil soluble surfactants glyceryl monostearates, 29 kilograms of size distribution are the ultra-fine terra alba of 15-30um, 8 kg water soluble surfactants alkylphenol polyoxyethylene, stand-by;
Diesel oil, glyceryl monostearate are added in the container successively, it is mixed;
Superfine cement and ultra-fine terra alba are added in the diesel oil and glyceryl monostearate that mixes, and fully stirring disperses described superfine cement and ultra-fine terra alba fully, obtains mixing mud.
Described alkylphenol polyoxyethylene is joined fully in the mixing mud after disperseing, and stirring gets final product.
Below be the test example, rock core is synthetic core in the test, liquid infusion pump band tensimeter, and injection length is chosen as 2 minutes, and 2 minutes liquid outflow amount reaches 2 times of rock pore volumes, is considered as hole is occupied fully.
Serve as according to calculating sealing ratiod with the injection pressure lift-off value in the test, oil base grout injection pressure surpasses 8Mpa, and then effluent liquid seldom and clarification is considered as complete shutoff, is that radix calculates sealing ratiod with this pressure.
Data gathering and calculating are all carried out according to the relevant regulations of oil reservoir test.
Test example 1
The oil base grout that embodiment 1-5 is prepared gained, be applied to the synthetic core shutoff of pore size distribution complexity respectively, described synthetic core maximum diameter of hole is 88um, the minimum-value aperture is 18um, mean pore size is 36um, and experiment with computing is mean value as a result, injection length 1.2 minutes, injection pressure namely surpasses 8Mpa, and sealing ratiod is 100%.
Get the identical deal of oil base grout for preparing gained with embodiment 1-5, size distribution is the oil base grout that the single particle size superfine cement of 10-15um makes, be respectively applied to the synthetic core shutoff of above-mentioned pore size distribution range, experiment with computing is mean value as a result, injection length 2 minutes, injection pressure 7.7Mpa, sealing ratiod are 96.3%.
Test example 2
The oil base grout that embodiment 6-10 is prepared gained, be applied to the synthetic core shutoff of pore size distribution complexity respectively, described synthetic core maximum diameter of hole is 190um, the minimum-value aperture is 55um, mean pore size is 92um, and experiment with computing is mean value as a result, injection length 2 minutes, injection pressure surpasses 8Mpa, and sealing ratiod is 100%.
Get the identical deal of oil base grout for preparing gained with embodiment 6-10, size distribution is the oil base grout that the single particle size superfine cement of 10-15um makes, be respectively applied to the synthetic core shutoff of above-mentioned pore size distribution range, experiment with computing is mean value as a result, injection length 2 minutes, injection pressure 6.2Mpa, sealing ratiod are 77.5%.
Test example 3
The oil base grout that embodiment 11-15 is prepared gained, be applied to the synthetic core shutoff of pore size distribution complexity respectively, described synthetic core maximum diameter of hole is 320um, the minimum-value aperture is 85um, mean pore size is 144um, and experiment with computing is mean value as a result, injection length 2 minutes, injection pressure 7.8Mpa, sealing ratiod are 97.5%.
Get the identical deal of oil base grout for preparing gained with embodiment 11-15, size distribution is the oil base grout that the single particle size superfine cement of 10-15um makes, be respectively applied to the synthetic core shutoff of above-mentioned pore size distribution range, experiment with computing is mean value as a result, injection length 2 minutes, injection pressure 3.5Mpa, sealing ratiod are 44%.
Test example 4
The oil base grout that embodiment 16-20 is prepared gained, be applied to the synthetic core shutoff of pore size distribution complexity respectively, described synthetic core maximum diameter of hole is 380um, the minimum-value aperture is 90um, mean pore size is 180um, and experiment with computing is mean value as a result, injection length 2 minutes, injection pressure 7.6Mpa, sealing ratiod are 95%.
Get the identical deal of oil base grout for preparing gained with embodiment 16-20, size distribution is the oil base grout that the single particle size superfine cement of 10-15um makes, be respectively applied to the synthetic core shutoff of above-mentioned pore size distribution range, experiment with computing is mean value as a result, injection length 2 minutes, injection pressure 3.6Mpa, sealing ratiod are 45%.
Test example 5
The oil base grout that embodiment 16-20 is prepared gained, be applied to the synthetic core shutoff of pore size distribution complexity respectively, described synthetic core maximum diameter of hole is 385um, the minimum-value aperture is 105um, mean pore size is 189um, and experiment with computing is mean value as a result, injection length 2 minutes, injection pressure 7.5Mpa, sealing ratiod are 93.8%.
Get the identical deal of oil base grout for preparing gained with embodiment 16-20, size distribution is the oil base grout that the single particle size superfine cement of 10-15um makes, be respectively applied to the synthetic core shutoff of above-mentioned pore size distribution range, experiment with computing is mean value as a result, injection length 2 minutes, injection pressure 3.0Mpa, sealing ratiod are 37.5%.
Obviously, above-described embodiment only is for example clearly is described, 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 need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the invention.
Claims (9)
1. an oil base superfine cement slurry comprises superfine cement, diesel oil, oil soluble surfactant, it is characterized in that described each raw material is counted by every cubic metre of diesel oil:
Contain described superfine cement 1.5-3.0 ton, contain described oil soluble surfactant 3-10 kilogram;
Described superfine cement is that the size distribution of the cement of 10-15um and 30%-50% is that the cement of 30-35um is formed by the size distribution of 50%-70%.
2. oil base superfine cement slurry according to claim 1 is characterized in that every cubic metre of diesel oil contains 2 tons of described superfine cements, contains described oil soluble surfactant 5-6 kilogram.
3. oil base superfine cement slurry according to claim 1 is characterized in that every cubic metre of diesel oil contains 3 tons of described superfine cements, contains described oil soluble surfactant 8-10 kilogram.
4. according to the arbitrary described oil base superfine cement slurry of claim 1-3, it is characterized in that described oil soluble surfactant is one or more in anhydrous sorbitol list olein, polyoxyethylene sorbitan mono laurate fat, the glyceryl monostearate.
5. oil base superfine cement slurry according to claim 4 is characterized in that every cubic metre of diesel oil also contains ultra-fine terra alba and/or the 5-8 kg water soluble surfactants that 25-30 kilogram size distribution is 15-30um.
6. oil base superfine cement slurry according to claim 5 is characterized in that described water soluble surfactant active is one or both in alkylphenol polyoxyethylene, the fatty alcohol-polyoxyethylene ether.
7. the making method of the arbitrary described oil base superfine cement slurry of claim 1-4 comprises the steps:
The size distribution that takes by weighing specified quantitative is that 10-15um superfine cement, size distribution are superfine cement, diesel oil, the oil soluble surfactant of 30-35um, and is stand-by;
Diesel oil, oil soluble surfactant are added in the container successively, it is mixed;
Superfine cement is added in the diesel oil and oil soluble surfactant that mixes, and fully stirring disperses described superfine cement fully, obtains mixing mud.
8. the making method of oil base superfine cement according to claim 7 slurry is characterized in that: also be included in the step that adds ultra-fine terra alba in the diesel oil that mixes and the oil soluble surfactant.
9. according to the making method of claim 7 or 8 described oil base superfine cements slurry, it is characterized in that: also comprise the water soluble surfactant active being joined in the mixing mud after disperseing fully the step that stirs.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008017414A1 (en) * | 2006-08-07 | 2008-02-14 | Services Petroliers Schlumberger | Pumpable geopolymer formulation for oilfield application |
| CN101239803A (en) * | 2008-03-04 | 2008-08-13 | 北京市市政工程研究院 | Ultra-fine cement slurry for reinforcing powder fine sand and preparation method thereof |
| CN101597497A (en) * | 2009-07-09 | 2009-12-09 | 北京市市政工程研究院 | Water glass-triacetyl glycerine grouting material and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008017414A1 (en) * | 2006-08-07 | 2008-02-14 | Services Petroliers Schlumberger | Pumpable geopolymer formulation for oilfield application |
| CN101239803A (en) * | 2008-03-04 | 2008-08-13 | 北京市市政工程研究院 | Ultra-fine cement slurry for reinforcing powder fine sand and preparation method thereof |
| CN101597497A (en) * | 2009-07-09 | 2009-12-09 | 北京市市政工程研究院 | Water glass-triacetyl glycerine grouting material and preparation method thereof |
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