CN102628761B - Artificial long core and preparation method thereof - Google Patents
Artificial long core and preparation method thereof Download PDFInfo
- Publication number
- CN102628761B CN102628761B CN201210101103.8A CN201210101103A CN102628761B CN 102628761 B CN102628761 B CN 102628761B CN 201210101103 A CN201210101103 A CN 201210101103A CN 102628761 B CN102628761 B CN 102628761B
- Authority
- CN
- China
- Prior art keywords
- rock core
- core
- mould
- sand
- plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to an artificial long core and a preparation method thereof. The problem that the length of the traditional artificial core is hard to satisfy experimental requirements is solved. The core comprises a quartz sand and a cement; and the preparation method comprises the following steps of: first, weighing the quartz sand and the cement according to requirements; uniformly mixing the quartz sand and the cement; putting a mixture into a square steel mold; pressing and drying the mixture by a pressure testing machine; slotting the mixture by a cutter; and finally, carrying out casting and sealing treatment on cutting joints and core appearance surface by using epoxy resins so as to obtain a core with permeability of 1mD-10000mD, wherein the slotted core is of long strip shape, 200-3000 cm long and 6.25-144 cm2 in section area; and the total pore volume of the long strip shaped core is 1000-50000 cm3. The pore structure of the core is similar to the pore structure of a natural sandstone reservoir core, the length of the core is far larger than the length (100 cm) of the traditional artificial core; and experiment requirements such as chemical flooding, dynamic polymer gel formation and the like can be satisfied.
Description
Technical field
The present invention relates to a kind of rock core for the evaluation of oilfield chemistry oil displacement agent seepage characteristic and injection parameter optimization, belong to a kind of artificial long rock core and preparation method thereof.
Background technology
In oilfield development process, chemical oil displacement agent has a very important role for improving waterflooding development effect and improving oil recovery factor, and the oil displacement agent product that possesses certain function often has many, and this just need to be preferred to product.Product preferably, according to being its seepage characteristic in reservoir cores, needs to carry out rock core displacement test.At present, because natural core price is high and be subject to source and the restriction of specification, most employing synthetic cores when domestic research institution carries out rock core displacement test.
At present, that Artificial Core Making method has is quartz sand epoxy resin cementitious, silica sand or glass bead filling and silica sand aluminum phosphate sintering etc. several, wherein silica sand aluminum phosphate sintering process is made the poor repeatability of rock core, silica sand or glass bead filling model be not containing cementing matter, the aspects such as its pore-size and pore texture and natural core difference are larger, and the application of these two kinds of rock cores is restricted.Quartz sand epoxide-resin agglutinated not only blowhole size is close with natural core with architectural feature, and manufacture craft is simple, rock core is repeated good, thereby in naphthology research, is widely used at home.
But due to the restriction of be under pressure testing machine and die size and insulation can (simulating oil deposit temperature) size, existing monolithic quartz sand epoxide-resin agglutinated length is no more than 100cm, can meet general displacement test requirement.But for chemical oil displacement agent experimental study such as distribution rule and polymer gel dynamic colloid formation in porous medium, often require rock core length will reach several meters even tens meters, existing rock core cannot meet length requirement.Existing solution has two kinds, for sand-filling tube model, is by increasing fill out sand tube quantity, for quartz sand epoxide-resin agglutinated, is by gate and pipeline, some blocks of rock cores to be together in series.Practice shows, these two kinds of rock cores are Shortcomings and defect all.For passing through to increase the amount formed long sand-filling tube model of fill out sand tube, the one, sand-packed model itself is containing cementing matter, and there is larger difference in pore texture and natural core; The 2nd, length surpasses after certain size, and back-up sand technique is difficult to ensure that each fill out sand tube character is close.The long rock core that series connection forms for quartz sand epoxide-resin agglutinated, oil displacement agent alternately flows in rock core and gate and pipeline, there is larger difference in pipeline bulk and architectural feature and rock core hole, experimental result is difficult to reflect truly the seepage flow characteristics of oil displacement agent in reservoir rocks.
Summary of the invention
In order to solve existing synthetic core length, be difficult to practical requirement technical barrier, the invention provides a kind of artificial long rock core and preparation method thereof.This rock core is formed by quartz sand epoxy resin cementitious compacting, its pore texture and surface nature and reservoir rocks close, and also length can meet the requirement of displacement test to monolithic rock core length.
The technical solution adopted in the present invention is: this rock core is comprised of silica sand and cementing matter, mixed and put into square bar molding jig, through pressure testing machine, suppress and dry, by the rock core after drying through cutting machine slot, finally by epoxy resin, slot and rock core appearance surfaces are cast, obtain permeability 1mD～10000mD rock core, after slot, rock core is " coil pipe " shape, length 200cm～3000cm, rectangular rock core total pore size volume 1000cm
3～50000cm
3.
The preparation method of artificial long rock core, comprises the following steps:
(1) mould: mould is comprised of side plate, end plate, base plate and pressing plate, its latus inframedium and end plate are steel, and base plate is bakelite plate, and pressing plate is high-density plate; Square bar molding jig physical dimension: length * wide * height=30cm～120cm * 30cm～120cm * 10cm～30cm;
(2) batching: rock core is made material and is comprised of silica sand and cementing matter;
(3) sand cutting: the silica sand of different-grain diameter is mixed in proportion, stir, will prepare the required medicine of cementing matter and weigh respectively on request, pour into after mixing in silica sand, stir, sieve;
(4) dress mould: before sand packs mould into, with acetone, mould inner side is cleaned, then moves around with stragith edge along continuous straight runs in mould, also need around here constantly to adjust the stragith edge degree of depth, until sand is uniformly distributed, finally with pressing plate by sand compacting;
(5) pressurization: the mould of having loaded is placed on pressure testing machine, adjusts die location, it is remained on pressing machine bearing plate center line, then slowly boost to design load, voltage stabilizing 15min, release;
(6) heat: the rock core after compacting is put into baking oven, and under 85 ℃ of conditions, constant temperature 6～8h solidifies;
(7) cutting: tabular rock core slot after solidifying, obtains the long rock core of " coil pipe " shape;
(8) casting sealing: slot rock core is placed in wooden die, pours epoxy resin into, obtain the rock core of design length after it solidifies.
The beneficial effect that the present invention has is: rock core end face of the present invention is rectangle or square, and sectional area is 6.25cm
2～144cm
2, length reaches several meters even tens meters, is suitable for chemical oil displacement agent experimental study such as distribution rule and polymer gel dynamic colloid formation in porous medium.The invention solves the length that some blocks of rock cores are together in series to increase rock core causes experimental result to be difficult to reflect truly the technical matters of the seepage flow characteristics of oil displacement agent in reservoir rocks, rock core not only blowhole size is close with natural core with architectural feature, and manufacture craft is simple, rock core is repeated good
accompanying drawing explanation:
Schematic diagram after Fig. 1 rock core slot;
Fig. 2 slot rock core pictorial diagram;
Fig. 3 is the structural representation of mould.
embodiment:
Embodiment 1, mould form (Fig. 3) by side plate, end plate, base plate and pressing plate, base plate bakelite plate, and pressing plate is high-density plate, all the other are carbon steel.Biside plate end face respectively has one group of eyelet, available bolt links together two Side plates, after mould is installed, get each 8500 grams of medium sand B and coarse sand A, mix, extracting epoxy resin is 750 grams again, 200 grams of dibutyl phthalate (DBP)s, 500 grams, 50 grams of ethylenediamines and acetone, after mixing, pour in silica sand, stir, sieve, to guarantee that silica sand and cementing matter mix, after mould inner side being cleaned with acetone, pack the potpourri of silica sand and cementing matter into mould, now with stragith edge along continuous straight runs in mould, move around, finally with pressing plate by sand compacting, the mould of having loaded is placed on pressure testing machine, adjust die location, it is remained on pressing machine bearing plate center line, then slowly boost to design load, voltage stabilizing 15min, release, rock core after compacting is put into baking oven, under 85 ℃ of conditions, constant temperature 6h solidifies.Close baking oven power supply, naturally cool to room temperature, the tabular rock core after solidifying is carried out to slot, in Fig. 1, white lines are slot, then with epoxy resin, carry out integral cast, obtain " coil pipe " shape rock core of design length after it solidifies.Core permeability 5000mD, length 960cm.
Embodiment 2, mould form (see figure 3) by side plate, end plate, base plate and pressing plate, base plate bakelite plate, and pressing plate is high-density plate, all the other are carbon steel.Biside plate end face respectively has one group of eyelet, available bolt links together two Side plates, after mould is installed, get each 9000 grams of medium sand B and fine sand C, extracting epoxy resin is 600 grams again, 112 grams of dibutyl phthalate (DBP)s, 240 grams, 48 grams of ethylenediamines and acetone, after mixing, pour in silica sand, stir, sieve, to guarantee that silica sand and cementing matter mix, after mould inner side being cleaned with acetone, pack the potpourri of silica sand and cementing matter into mould, now with stragith edge along continuous straight runs in mould, move around, finally with pressing plate by sand compacting, the mould of having loaded is placed on pressure testing machine, adjust die location, it is remained on pressing machine bearing plate center line, then slowly boost to design load, voltage stabilizing 15min, release, rock core after compacting is put into baking oven, under 85 ℃ of conditions, constant temperature 6h solidifies.Close baking oven power supply, naturally cool to room temperature, the tabular rock core after heating cure is carried out to slot, then with epoxy resin, carry out integral cast, after it solidifies, obtain " coil pipe " shape rock core of design length.Core permeability 3000mD, length 960cm.
Embodiment 3, mould form (see figure 3) by side plate, end plate, base plate and pressing plate etc., and base plate and pressing plate are hardwood, and all the other are carbon steel.Biside plate end face respectively has one group of eyelet, available bolt links together two Side plates, after mould is installed, coarse sand A and fine sand C are respectively got to 9500 grams, again by 300 grams of epoxy resin, 56 grams of dibutyl phthalate (DBP)s, 120 grams, 24 grams of ethylenediamines and acetone, after mixing, pour in silica sand, stir, sieve, to guarantee that silica sand and cementing matter mix, after mould inner side being cleaned with acetone, pack the potpourri of silica sand and cementing matter into mould, now with stragith edge along continuous straight runs in mould, move around, finally with pressing plate by sand compacting, the mould of having loaded is placed on pressure testing machine, adjust die location, it is remained on pressing machine bearing plate center line, then slowly boost to design load, voltage stabilizing 15min, release, rock core after compacting is put into baking oven, under 85 ℃ of conditions, constant temperature 6h solidifies.Close baking oven power supply, naturally cool to room temperature, the tabular rock core after heating cure is carried out to slot, then with epoxy resin, carry out integral cast, after it solidifies, obtain " coil pipe " shape rock core of design length.Core permeability 9000mD, length 960cm.
Claims (2)
1. an artificial long rock core, this rock core is comprised of silica sand and cementing matter, mixed and put into square bar molding jig, through pressure testing machine, suppress and dry, it is characterized in that: the rock core after drying, through cutting machine slot, is cast to slot and rock core appearance surfaces finally by epoxy resin, obtain permeability 1mD～10000mD rock core, after slot, rock core is " coil pipe " shape, length 200cm～3000cm, rectangular rock core total pore size volume 1000cm
3～50000cm
3.
2. the preparation method of artificial long rock core claimed in claim 1, comprises the following steps:
(1) mould: mould is comprised of side plate, end plate, base plate and pressing plate, its latus inframedium and end plate are steel, and base plate is bakelite plate, and pressing plate is high-density plate; Square bar molding jig physical dimension: length * wide * height=30cm～120cm * 30cm～120cm * 10cm～30cm;
(2) batching: rock core is made material and is comprised of silica sand and cementing matter;
(3) sand cutting: the silica sand of different-grain diameter is mixed in proportion, stir, will prepare the required medicine of cementing matter and weigh respectively on request, pour into after mixing in silica sand, stir, sieve;
(4) dress mould: before sand packs mould into, with acetone, mould inner side is cleaned, then moves around with stragith edge along continuous straight runs in mould, also need around here constantly to adjust the stragith edge degree of depth, until sand is uniformly distributed, finally with pressing plate by sand compacting;
(5) pressurization: the mould of having loaded is placed on pressure testing machine, adjusts die location, it is remained on pressing machine bearing plate center line, then slowly boost to design load, voltage stabilizing 15min, release;
(6) heat: the rock core after compacting is put into baking oven, and under 85 ℃ of conditions, constant temperature 6～8h solidifies;
(7) cutting: tabular rock core slot after solidifying, obtains " coil pipe " shape rock core;
(8) casting sealing: slot rock core is placed in wooden die, pours epoxy resin into, obtain the rock core of design length after it solidifies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210101103.8A CN102628761B (en) | 2012-04-10 | 2012-04-10 | Artificial long core and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210101103.8A CN102628761B (en) | 2012-04-10 | 2012-04-10 | Artificial long core and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102628761A CN102628761A (en) | 2012-08-08 |
| CN102628761B true CN102628761B (en) | 2014-04-23 |
Family
ID=46587060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210101103.8A Expired - Fee Related CN102628761B (en) | 2012-04-10 | 2012-04-10 | Artificial long core and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102628761B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Families Citing this family (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102749275B (en) * | 2012-06-04 | 2017-08-15 | 东北石油大学 | A kind of preparation method for visualizing artificial core model |
| CN103454380A (en) * | 2013-08-15 | 2013-12-18 | 中国石油天然气股份有限公司 | Artificial rock core for evaluating damage of unconsolidated strata and manufacturing method thereof |
| CN103616270B (en) * | 2013-12-01 | 2016-05-11 | 东北石油大学 | A kind of preparation method of lateral accretion interbed artificial core and specific purpose tool |
| CN103983489A (en) * | 2014-05-26 | 2014-08-13 | 中国石油大学(华东) | Preparation method of crack type carbonate rock core |
| CN104295281A (en) * | 2014-06-03 | 2015-01-21 | 中国石油大学(北京) | Shale gas reservoir complex fracture conductivity simulation experiment method |
| CN104406828B (en) * | 2014-10-30 | 2017-01-25 | 东北石油大学 | Weak-interface and low-strength rock sample making apparatus and sample making method thereof |
| CN104655808B (en) * | 2015-03-17 | 2016-08-24 | 东北石油大学 | A kind of Fracture with low permeability oil reservoir imbibition oil recovery experimental technique |
| CN105545263B (en) * | 2015-12-08 | 2017-04-12 | 东北石油大学 | Visual sand blasting model used for oil displacement experiment and manufacturing method thereof |
| CN105541185B (en) * | 2016-02-02 | 2017-12-26 | 中国地质大学（北京） | A kind of joint property emulation oil-producing gas shale and preparation method thereof |
| CN106442049B (en) * | 2016-09-13 | 2020-06-02 | 东北石油大学 | Preparation device and preparation method of macroscopic large rock core for simulating gravity differentiation experiment |
| CN106324223B (en) * | 2016-09-30 | 2019-04-09 | 东北石油大学 | A kind of high infiltration strip core model and production method and device |
| CN106338421A (en) * | 2016-10-09 | 2017-01-18 | 东北石油大学 | Planar radial flow rock core preparation device and method |
| CN106442064A (en) * | 2016-10-28 | 2017-02-22 | 西南石油大学 | Casting method of epoxy resin covered rock core |
| CN106501054B (en) * | 2016-12-12 | 2023-08-11 | 西南石油大学 | Mould for preparing artificial square rock core and preparation method of square rock core |
| CN106596223B (en) * | 2016-12-12 | 2020-04-21 | 西南石油大学 | Preparation method of rock core for dense conglomerate oil displacement |
| CN106908292A (en) * | 2017-02-28 | 2017-06-30 | 中国石油化工股份有限公司 | A kind of mud shale artificial core preparation method and application |
| CN107402286B (en) * | 2017-08-01 | 2019-09-03 | 东北石油大学 | Delay swollen performance test experimental method in a kind of polymer microballoon rock core |
| CN107884257B (en) * | 2017-11-22 | 2020-07-31 | 东北石油大学 | Preparation method of artificial rock core for testing fracturing performance of rock containing controllable cracks |
| CN108426753A (en) * | 2018-01-17 | 2018-08-21 | 中国地质大学（武汉） | A kind of artificial shale core preparation method based on inorganic glue proportioning |
| CN108386179B (en) * | 2018-03-13 | 2019-04-02 | 西南石油大学 | A kind of optimization method of sandstone reservoir hydraulic fracturing proppants parameter |
| CN108986627B (en) * | 2018-06-13 | 2021-01-01 | 中国石油天然气股份有限公司 | Artificial rock core microscopic visualization model and preparation method and application thereof |
| CN109162709B (en) * | 2018-09-05 | 2020-12-25 | 中国石油大学(北京) | Preparation method and application of physical simulation sample of hole type carbonate reservoir |
| CN109443877A (en) * | 2018-12-16 | 2019-03-08 | 东北石油大学 | A kind of thick oil steam drive high temperature high voltage resistant rock core preparation method |
| CN111122270A (en) * | 2020-01-02 | 2020-05-08 | 陕西科技大学 | Silicate high-porosity artificial core and preparation method thereof |
| CN111175108B (en) * | 2020-03-01 | 2022-09-02 | 东北石油大学 | Ultra-low permeability natural core pillar electrode and pressure measuring point arrangement pouring method |
| CN113358815A (en) * | 2020-03-06 | 2021-09-07 | 中国石油天然气股份有限公司 | Chemical agent performance evaluation device and method |
| CN111283935B (en) * | 2020-03-09 | 2021-12-21 | 东北石油大学 | High-efficient artificial rock core epoxy pours device |
| CN113702147A (en) * | 2020-05-20 | 2021-11-26 | 中国石油天然气股份有限公司 | Core manufacturing method |
| CN114487267A (en) * | 2020-10-26 | 2022-05-13 | 中国石油化工股份有限公司 | Experimental method for rapidly evaluating oil displacement effect of oil displacement agent |
| CN114935486B (en) * | 2022-06-06 | 2023-04-11 | 陕西科技大学 | Heterogeneous core material based on corn straw core and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664547A (en) * | 2005-03-30 | 2005-09-07 | 大庆石油学院 | Quartz sand epoxide-resin agglutinated rock core and method for making same |
| CN1664546A (en) * | 2005-03-30 | 2005-09-07 | 大庆石油学院 | Process for making quartz sand epoxy resin cementitious non-homogeneous model |
| CN101435330A (en) * | 2008-11-24 | 2009-05-20 | 中国石油集团长城钻探工程有限公司 | Method for manufacturing artificial rock core target |
-
2012
- 2012-04-10 CN CN201210101103.8A patent/CN102628761B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1664547A (en) * | 2005-03-30 | 2005-09-07 | 大庆石油学院 | Quartz sand epoxide-resin agglutinated rock core and method for making same |
| CN1664546A (en) * | 2005-03-30 | 2005-09-07 | 大庆石油学院 | Process for making quartz sand epoxy resin cementitious non-homogeneous model |
| CN101435330A (en) * | 2008-11-24 | 2009-05-20 | 中国石油集团长城钻探工程有限公司 | Method for manufacturing artificial rock core target |
Non-Patent Citations (6)
| Title |
|---|
| jian zhang等.Performance evaluation of oil displacing agents for primary-minor layers of the Daqing Oilfield.《Petroleum Science》.2011,第8卷(第1期),79-86. |
| Performance evaluation of oil displacing agents for primary-minor layers of the Daqing Oilfield;jian zhang等;《Petroleum Science》;20110331;第8卷(第1期);79-86 * |
| 张跃等.驱油剂与转向剂对岩心相对渗透率的影响.《大庆石油学院学报》.2010,第34卷(第2期),54-59. |
| 徐洪波等.砂岩储层全岩矿物模拟岩心的制作方法研究与评价.《海洋石油》.2009,第29卷(第3期),19-25. |
| 砂岩储层全岩矿物模拟岩心的制作方法研究与评价;徐洪波等;《海洋石油》;20090930;第29卷(第3期);19-25 * |
| 驱油剂与转向剂对岩心相对渗透率的影响;张跃等;《大庆石油学院学报》;20100430;第34卷(第2期);54-59 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102628761A (en) | 2012-08-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102628761B (en) | Artificial long core and preparation method thereof | |
| US11092524B2 (en) | Method and device for preparing karst caves based on 3D printing technology | |
| CN106596223B (en) | Preparation method of rock core for dense conglomerate oil displacement | |
| CN1304830C (en) | Process for making quartz sand epoxy resin cementitious non-homogeneous model | |
| CN104655808B (en) | A kind of Fracture with low permeability oil reservoir imbibition oil recovery experimental technique | |
| CN102289980B (en) | Method for preparing preset cracks in hydrofracture simulation specimen | |
| CN1664547A (en) | Quartz sand epoxide-resin agglutinated rock core and method for making same | |
| CN105973679B (en) | A kind of man-made fracture Corestone manufacture method | |
| WO2018141118A1 (en) | Preparation method for large model microcrack rock core having low permeability | |
| CN104458383A (en) | Method for making artificial rock core | |
| CN103411804B (en) | Heterogeneous cemented rock core model with high-permeability layer and manufacturing method thereof | |
| CN203239338U (en) | Two-dimensional artificial core model for researching edge-bottom water oil reservoir water invasion rules | |
| CN102749275A (en) | Visualized artificial core model and preparation method thereof | |
| CN103616270B (en) | A kind of preparation method of lateral accretion interbed artificial core and specific purpose tool | |
| CN106442064A (en) | Casting method of epoxy resin covered rock core | |
| CN103926122B (en) | To shake out rock core and making apparatus thereof and method for making | |
| CN106989968B (en) | Manufacturing device and method for three-dimensional fracture rock test piece for hydraulic coupling test | |
| CN107884257A (en) | For the artificial core preparation method tested containing controllable crack rock crush properties | |
| CN105954079A (en) | Cementing forming and maintenance method for rock-soil mass model material and improved mold suitable for method | |
| CN109342138A (en) | The artificial shale core production method of densification and its molding die for having stratification | |
| CN105571917A (en) | Lengthened artificial rock core, and preparation method and preparation device thereof | |
| CN102704926A (en) | Method for manufacturing hypotonic and ultralow-permeability three-dimensional sand-packed model | |
| US20200300054A1 (en) | Method for preparing artificial core to simulate fluvial sedimentary reservoir | |
| CN106501054A (en) | A kind of mould for preparing artificial side's rock core and the preparation method of square rock core | |
| CN203965204U (en) | The making apparatus of rock core shakes out |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140423 Termination date: 20150410 |
|
| EXPY | Termination of patent right or utility model |