CN1304830C - Process for making quartz sand epoxy resin cementitious non-homogeneous model - Google Patents
Process for making quartz sand epoxy resin cementitious non-homogeneous model Download PDFInfo
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- CN1304830C CN1304830C CNB2005100636658A CN200510063665A CN1304830C CN 1304830 C CN1304830 C CN 1304830C CN B2005100636658 A CNB2005100636658 A CN B2005100636658A CN 200510063665 A CN200510063665 A CN 200510063665A CN 1304830 C CN1304830 C CN 1304830C
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Abstract
The present invention relates to a manufacturing method of a heterogeneous model glued with quartz sand and epoxy resin, which mainly solves the problem in simulating the heterogeneity of strata by a heterogeneous model manufactured from a multilayer rock core. The manufacture of the model mainly comprises the following procedures: (1) assembling a mold, (2) proportioning, (3) mixing sand, (4) loading the sand, (5) processing by pressing, (6) solidifying by heating and (7) sealing. The pore structure characteristics, the surface properties and the heterogeneity of an actual oil reservoir can be reflected relatively truly by the heterogeneous model glued with the quartz sand and the epoxy resin, and the present invention can be used for the parameter optimization of the development of a water drive or a chemical drive, and the performance evaluation of chemical additives.
Description
Technical field:
The present invention relates to a kind of non-homogeneous model that is used for evaluating oilfield chemical assistant performance and injection parameter thereof, belong to a kind of process for making quartz sand epoxy resin cementitious non-homogeneous model.
Background technology:
In heterogeneous reservoir waterflooding process, because the most permeable zone resistance to flow is little, water absorbing capacity is big, crude oil recovery percent of reserves height.In contrast, middle low permeability layer is big because of resistance to flow, the little recovery percent of reserves of water absorbing capacity is low.For a long time, how to reduce high osmotic absorbent amount, increase in the hyposmosis water absorbing capacity promptly to adjust fluid entry profile (abbreviation profile control) be one of technical barrier of puzzlement oil-field development.At present, the major technique measure of heterogeneous reservoir profile control is the shutoff most permeable zone.The chemical assistant that possesses certain profile control function on the market often has many, and this just need estimate with product preferred to its performance.Quartz sand epoxy resin cementitious non-homogeneous model is the simulating oil deposit heterogeneous body more truly, can substitute the performance that actual oil reservoir comes the evaluating chemical auxiliary agent.
Summary of the invention:
The invention provides a kind of process for making quartz sand epoxy resin cementitious non-homogeneous model, quartz sand epoxy resin cementitious model can reflect actual reservoir pore architectural feature, surface nature and nonuniformity more truly, can be used for water drive or chemical flooding development parameters preferably with chemical assistant performance evaluation.
The technical solution adopted in the present invention is: this process for making quartz sand epoxy resin cementitious non-homogeneous model, and comprise the following steps: (1) mould: mould is made up of side plate, end plate, base plate and pressing plate; (2) batching: the modelling material mainly is made up of silica sand 85%～95% and cementing matter 5%～15%, material by weight ratio, model generally includes 3 pervious courses; (3) sand cutting: according to the modelling number of plies, required silica sand of each layer and cementing matter are carried out weighing respectively, mix, stir, sieve, standby; (4) dress sand: according to the upper and lower relation of each pervious course of model design, the sand that respectively correspondence is contained cementing matter pack into successively mould and manual compacting; (5) press molding: mould is placed on the pressure testing machine, adjust die location, it is remained on the pressing machine bearing plate center line, slowly rise to 14～83 standard atmospheric pressures then, voltage stabilizing 15min, release; (6) heating cure: the model after will suppressing is put into baking oven, and constant temperature 6～8h solidifies under 85 ℃ of conditions, closes the baking oven power supply, naturally cools to room temperature; (7) encapsulation process: 1. cutting utilizes cutting machine that tabular molding is cut into the needed size of experiment; 2. the bonding bakelite plate that 1cm is thick of end cap is processed into an end cap identical with the model face size, the middle part of end cap is drilled with an eyelet, one side processes a groove less than the end cap outer rim, the peripheral edge portion of end cap trough of belt face is spread still uncured epoxy resin, and allow it be connected with the model end face; 3. the remaining surface of antiseepage transaction module is evenly smeared the epoxy resin after the multiviscosisty, forms the thin layer of the about 1mm of thickness; 4. casting will have end cap and put into wooden die through the model after the surface treatment, and two ends seal with plasticine, then epoxy resin are poured in the mould, place 24h in room temperature and promptly get this model.5. the model after pressure testing will be solidified takes out from wooden die, with 0.8MPa gas it is carried out pressure testing, to guarantee no seepage and no leakage; 6. the model that perm-plug method is qualified with pressure testing carries out gas permeability mensuration, to guarantee that measured value and design load deviation are less than 10%.
Above-mentioned cementing matter is made up of epoxy resin and three kinds of adjuvants, epoxy resin and adjuvant by weight ratio: 0.1～1 part in 0.5～1.5 part of epoxy resin, 0.1～0.5 part of dibutyl phthalate (DBP), 0.01～0.1 part of ethylenediamine and acetone; 0.4 part in 1 part of epoxy resin, 0.2 part of dibutyl phthalate (DBP), 0.08 part of ethylenediamine and acetone.
Above-mentioned silica sand is divided into two kinds on Type B and C type, and its quartz content is 99.9%, and sreen analysis sees Table 1, and the BC molding sand is mixed by Type B and C type each half.
Table 1 quartz sand size is formed percentage
The invention has the beneficial effects as follows: adopt rock core that said ratio and method make to compare with natural core and have similarity preferably at aspects such as pore texture and surface naturies, by adjusting chemical composition and moulding pressure, can produce rock core with different physical parameters and surface nature, to satisfy the demand of different experiments purpose to different rock core parameters, this rock core has good repeatability simultaneously, and this has established material base for the foundation of same experimental conditions.According to the principle of similitude, the heterogeneous body situation of actual oil reservoir can be simulated with non-homogeneous model, and natural core can't be accomplished this point, it is particularly suitable for the performance evaluation of heterogeneous reservoir chemical oil displacement agent and profile control agent, make rock core simultaneously, its starting material source is wide, cheap, can produce in enormous quantities, and the expense of monolithic rock core is more much lower than natural core.
Description of drawings:
Fig. 1 is the permeability of Type B sand of the present invention and the graph of relation of cementing matter content;
Fig. 2 is the permeability of C molding sand of the present invention and the graph of relation of cementing matter content;
Fig. 3 is the permeability of Type B sand of the present invention and the graph of relation of pressure;
Fig. 4 is the permeability and the pressure dependence curve map of C molding sand of the present invention;
Fig. 5 is the structural representation of mould:
1-pressing plate among Fig. 5,2-end plate, 3-side plate, 4-bolt, 5-base plate.
Embodiment:
Below with the invention will be further described: this process for making quartz sand epoxy resin cementitious non-homogeneous model, comprise the following steps: (1) mould: mould is formed (seeing accompanying drawing 5) by side plate 3, end plate 2, base plate 5 and pressing plate 1, base plate and pressing plate are hardwood, all the other are carbon steel, the biside plate end face respectively has one group of bolt hole 4, and available bolt links together two side plates; (2) batching: the modelling material mainly is made up of silica sand 85%～95% and cementing matter 5%～15%, material by weight ratio, model generally includes 3 pervious courses, each layer of model permeability difference, material is formed also difference; (3) sand cutting: according to the modelling number of plies, required silica sand of each layer and cementing matter are carried out weighing respectively, mix, stir, sieve, standby; (4) dress sand: according to the upper and lower relation of each pervious course of model design, the sand that respectively correspondence is contained cementing matter pack into successively mould and manual compacting; (5) press molding: mould is placed on the pressure testing machine, adjust die location, it is remained on the pressing machine bearing plate center line, slowly rise to 14～83 standard atmospheric pressures then, voltage stabilizing 15min, release; (6) heating cure: the model after will suppressing is put into baking oven, and constant temperature 6～8h solidifies under 85 ℃ of conditions.Close the baking oven power supply, naturally cool to room temperature; (7) encapsulation process: 1. cutting utilizes cutting machine that tabular molding is cut into the experiment required size; 2. the bonding bakelite plate that 1cm is thick of end cap is processed into an end cap identical with the model face size, the middle part of end cap is drilled with an eyelet, one side processes a groove less than the end cap outer rim, the peripheral edge portion of end cap trough of belt face is spread still uncured epoxy resin, and allow it be connected with the model end face; 3. the epoxy resin after the multiviscosisty is evenly smeared on antiseepage transaction module surface, forms the thin layer of the about 1mm of thickness, epoxy resin intrusion model inside when avoiding casting; 4. casting will have end cap and put into wooden die through the model after the surface treatment, and two ends seal with plasticine, then epoxy resin are poured in the mould, place 24h in room temperature and promptly get this model.5. the model after pressure testing will be solidified takes out mould, with 0.8MPa gas it is carried out pressure testing, to guarantee no seepage and no leakage; 6. the model that perm-plug method is qualified with pressure testing carries out gas permeability mensuration, is no more than 10% to guarantee measured value and design load deviation.
Embodiment 1, (1) mould installs back weighing material, this model height, the material weighing of low 3 pervious courses of neutralization is respectively: ground floor: Type B silica sand 85 grams, epoxy resin 7.5 grams, dibutyl phthalate (DBP) 2 grams, ethylenediamine 0.5 gram and acetone 5 grams, the second layer: Type B silica sand 88 grams, epoxy resin 6.0 grams, dibutyl phthalate (DBP) 1.5 grams, ethylenediamine 0.5 gram and acetone 4 grams, the 3rd layer: Type B silica sand 91.5 grams, epoxy resin 5.5 grams, dibutyl phthalate (DBP) 1 gram, ethylenediamine 0.5 gram and acetone 1.5 grams stir after every layer of mixing of materials, sieve, standby; With ground floor, the second layer and the 3rd layer of material pack into successively mould and manual compacting; Mould is placed on the pressure testing machine, adjust die location, it is remained on the pressing machine bearing plate center line, slowly boost to 83 standard atmospheric pressures then, voltage stabilizing 15min, release; Model after the compacting is put into baking oven, and constant temperature 6h solidifies under 85 ℃ of conditions, closes the baking oven power supply, naturally cools to room temperature; (2) encapsulation process: utilize cutting machine that tabular molding is cut into and be of a size of length * wide * height=30 * 4.5 * 4.5cm; The bakelite plate processing that 1cm is thick is grown up * wide=4.5 * 4.5cm square end cap, the middle part of end cap is drilled with the eyelet of M8, one side processes the groove of long * wide * dark=4.0 * 4.0 * 0.3cm with milling machine, the peripheral edge portion of end cap trough of belt face is spread still uncured epoxy resin, and allow it be connected with the model end face; The remaining surface of model is evenly smeared the epoxy resin after the multiviscosisty, forms the thin layer of the about 1mm of thickness; To have end cap and put into wooden die through the model after the surface treatment, two ends seal with plasticine, then epoxy resin are poured in the mould, place 24h in room temperature and promptly get this model.
Embodiment 3, (1) mould installs back weighing material, this model height, the material weighing of low 3 pervious courses of neutralization is respectively: ground floor: C type silica sand 90 grams, epoxy resin 5.0 grams, dibutyl phthalate (DBP) 1.2 grams, ethylenediamine 0.5 gram and acetone 3.3 grams, the second layer: C type silica sand 92 grams, epoxy resin 4.5 grams, dibutyl phthalate (DBP) 1.3 grams, ethylenediamine 0.5 gram and acetone 1.7 grams, the 3rd layer: C type silica sand 95 grams, epoxy resin 3.0 grams, dibutyl phthalate (DBP) 0.6 gram, ethylenediamine 0.2 gram and acetone 1.2 grams stir after every layer of mixing of materials, sieve, standby; With ground floor, the second layer and the 3rd layer of material pack into successively mould and manual compacting; Mould is placed on the pressure testing machine, adjust die location, it is remained on the pressing machine bearing plate center line, slowly boost to 14 standard atmospheric pressures then, voltage stabilizing 15min, release; Model after the compacting is put into baking oven, and constant temperature 7h solidifies under 85 ℃ of conditions, closes the baking oven power supply, naturally cools to room temperature; (2) encapsulation process: utilize cutting machine that tabular molding is cut into and be of a size of length * wide * height=30 * 4.5 * 4.5cm; The bakelite plate processing that 1cm is thick is grown up * wide=4.5 * 4.5cm square end cap, the middle part of end cap is drilled with the eyelet of M8, one side processes the groove of long * wide * dark=4.0 * 4.0 * 0.3cm with milling machine, the peripheral edge portion of end cap trough of belt face is spread still uncured epoxy resin, and allow it be connected with the model end face; The remaining surface of model is evenly smeared the epoxy resin after the multiviscosisty, forms the thin layer of the about 1mm of thickness; To have end cap and put into wooden die through the model after the surface treatment, two ends seal with plasticine, then epoxy resin are poured in the mould, place 24h in room temperature and promptly get this model.
Claims (3)
1, a kind of process for making quartz sand epoxy resin cementitious non-homogeneous model comprises the following steps:
(1) mould: mould is made up of side plate, end plate, base plate and pressing plate;
(2) batching: the modelling material mainly is made up of silica sand 85%～95% and cementing matter 5%～15%, material by weight ratio, model generally includes 3 pervious courses;
(3) sand cutting: according to the modelling number of plies, required silica sand of each layer and cementing matter are carried out weighing respectively, mix, stir, sieve, standby;
(4) dress sand: according to the upper and lower relation of each pervious course of model design, the sand that respectively correspondence is contained cementing matter pack into successively mould and manual compacting;
(5) press molding: mould is placed on the pressure testing machine, adjust die location, it is remained on the pressing machine bearing plate center line, slowly rise to 14～83 standard atmospheric pressures then, voltage stabilizing 15min, release;
(6) heating cure: the model after will suppressing is put into baking oven, and constant temperature 6～8h solidifies under 85 ℃ of conditions, closes the baking oven power supply, naturally cools to room temperature;
(7) encapsulation process: 1. cutting utilizes cutting machine that tabular molding is cut into the needed size of experiment;
2. the bonding bakelite plate that 1cm is thick of end cap is processed into an end cap identical with the model face size, the middle part of end cap is drilled with an eyelet, one side processes a groove less than the end cap outer rim, the peripheral edge portion of end cap trough of belt face is spread still uncured epoxy resin, and allow it be connected with the model end face;
3. the remaining surface of antiseepage transaction module is evenly smeared the epoxy resin after the multiviscosisty, forms the thin layer of the about 1mm of thickness;
4. casting will have end cap and put into wooden die through the model after the surface treatment, and two ends seal with plasticine, then epoxy resin are poured in the mould, place 24h in room temperature and promptly get this model.
2, process for making quartz sand epoxy resin cementitious non-homogeneous model according to claim 1, it is characterized in that: wherein cementing matter is made up of epoxy resin and three kinds of adjuvants, epoxy resin and adjuvant by weight ratio: 0.1～1 part in 0.5～1.5 part of epoxy resin, 0.1～0.5 part of dibutyl phthalate (DBP), 0.01～0.1 part of ethylenediamine and acetone.
3, process for making quartz sand epoxy resin cementitious non-homogeneous model according to claim 2 is characterized in that: 0.4 part in 1 part of epoxy resin, 0.2 part of dibutyl phthalate (DBP), 0.08 part of ethylenediamine and acetone.
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| CN105571917A (en) * | 2015-12-28 | 2016-05-11 | 东北石油大学 | Lengthened artificial rock core, and preparation method and preparation device thereof |
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