CN102053026A - Material and method for manufacturing carbonate cave oil reservoir physical model - Google Patents
Material and method for manufacturing carbonate cave oil reservoir physical model Download PDFInfo
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- CN102053026A CN102053026A CN2009102367777A CN200910236777A CN102053026A CN 102053026 A CN102053026 A CN 102053026A CN 2009102367777 A CN2009102367777 A CN 2009102367777A CN 200910236777 A CN200910236777 A CN 200910236777A CN 102053026 A CN102053026 A CN 102053026A
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Abstract
The invention relates to a material and a method for manufacturing a carbonate cave oil reservoir physical model. The material is characterized by comprising a manufacturing main body material for cracks and caves in the physical model and a physical model skeleton material, wherein the manufacturing main body material for cracks and caves in the physical model is selected from wood's alloy and/or paraffin. The method comprises the following steps of: 1) manufacturing models of caves and cracks of different sizes and shapes by using the wood's alloy and/or the paraffin; and 2) after the models are formed, displacing the wood's alloy and/or the paraffin at the temperature of higher than 85 DEG C to obtain a crack cave with spatial structure. The manufactured physical model accords with the characteristics of carbonate cave oil reservoir and supplies reliable guarantee for developing various physical simulation experiments.
Description
Technical field
The present invention relates to used physical model in oil-gas field development field and physical simulation experiment, specifically is the material and the method for making of making carbonatite seam hole type physical models of reservoir.
Background technology
The hole type hydrocarbon-bearing pool of carbonatite seam is that China's important resource is taken over position and strategic direction.But, many difficult problems have been run on stream owing to its structure, reservoir, oil water relation etc. are very complicated.Mainly show as: the fine description difficulty of the reservoir and the fluid regularity of distribution is big; Seam hole system production capacity, product water, energy changing characteristics complexity; The method of artificial supplementation energy and technical measures are difficult to determine; Oil-water well well stimulation and raising recovery efficiency technique difficulty are big or the like.
Reservoir physical simulation is to be based upon on the similarity theory basis, creates an environment artificially, and the program by strictness realizes the tests of simulating technology to the oil reservoir development process, is the important technical of carrying out reservoir engineering and development technique research.Making up physical model then is the core of carrying out the reservoir physical simulation experiment.Physical model is the basis of reservoir physical simulation experiment.Suitable experimental physics model is the prerequisite and the basis of carrying out accurate reservoir characterization, reservoir engineering and development experiments research, also is key link and the gordian technique that guarantees these result of study accuracys.
Because the complicacy of carbonatite seam hole type oil reservoir has slit formation, solution cavity type, pore type, crack-solution cavity type, crack-pore type, hole-solution cavity type, crack-hole-polytypes such as solution cavity type to preserve body, nonuniformity is very strong.Low by the drilling and coring delivery yield rate, it is low that rock core goes out a ratio of briquetting, and the mould processing success ratio is low in testing laboratory, so the rock core model that can obtain from the down-hole is often representative very poor, can not reflect the truth of oil reservoir inside.
Be used to carry out the model that stitches hole type Carbonate Reservoir physical simulation at present and mostly be photoetching glass model and dull and stereotyped physical simulation, poor with the similarity of true reservoir rocks, and can not satisfy the needs that carbonatite stitches hole type reservoir condition physical simulation.
Prior art discloses 2 pieces of patent documentations, first piece: " smelting method for preparing borate glass base hole reservoir model ", application number: CN200710052873.7 mainly provides smelting method for preparing borate glass base hole reservoir model.This preparation method is that matrix, the natural galenite that hangs down velocity of wave are hole simulation snotter with the borate glass of high velocity of wave, galenite is processed into micron-sized particle, first melting borate glass in the high temperature muffle furnace is mixed in micron order galenite particle in the borate glass matrix when the glass ware forming and makes.The borate glass base hole reservoir model of the present invention's preparation, matrix ultrasonic velocity height, hole simulation snotter velocity of wave is low, matrix and hole velocity of wave coupling are better, moulded dimension is less, and realistic geological condition helps improving exploration success ratios such as reservoir, hydrocarbon-bearing pool.This patent is mainly used in the research of physical prospecting process.
Second piece: " the visual physical simulation displacement areal model that is used for the displacement of reservoir oil ", the patent No., 01261327.4, this patent is the plane visualization physical model, mainly form, be the low pressure model, be not used in physical simulation experiment under the High Temperature High Pressure with glass portrayal or etching.
Draw by contrast: existing artificial seam hole type physical model majority is applied to improve the exploration success ratio of reservoir, hydrocarbon-bearing pool or carries out simulated experiment under the low pressure condition, the surface nature in seam hole has than big difference with true reservoir rocks, other model that is applied to carbonatite seam hole type oil reservoir development and the evaluation of raising recovery ratio generally can only carry out qualitative experiment research under the low pressure, can not carry out physical simulation experiment under the reservoir temperature pressure condition.
Summary of the invention
In order to make up and the similar artificial physical model of true seam hole type physical models of reservoir, material therefor is selected, be identified for making the material composition of physical model.
The technical issues that need to address of the present invention are according to carbonatite seam hole type reservoir rocks composition and reservoir space design feature, to provide a kind of material composition that is used to make seam hole type Carbonate Reservoir physical model.
For achieving the above object, on the basis of similarity theory research, by to crack, solution cavity and matrix pores space distribution rule and geometric shape research, the material that makes up physical model is screened, select the physical model material that meets seam hole type Carbonate Reservoir feature.
The manufacturing materials of one of the present invention's carbonatite seam hole type physical models of reservoir is achieved in that
Described material comprises the making material of main part and the physical model framework material of crack solution cavity in the physical model;
The making material of main part of crack solution cavity is selected from Wood's metal and/or paraffin in the described physical model.
In concrete enforcement
(1) described Wood's metal is mainly used in making than cavern and crack, and its consumption calculates according to following formula: M
A=V φ
V﹠amp; f8.34, in the formula:
M
A-Wood's metal consumption, g;
The cumulative volume of V-institute processing model, cm
3
φ
V﹠amp; fNeed in-institute the processing model with the crack of Wood's metal filling and the factor of porosity in hole, %;
8.34-the average density of Wood's metal, g/cm
3
(2) described paraffin is mainly used in and makes less solution cavity and crack, and its consumption calculates according to following formula: M
w=V φ
w0.90, in the formula:
M
w-Wood's metal consumption, g;
The cumulative volume of V-institute processing model, cm
3
φ
wNeed in-institute the processing model with the crack of paraffin filling and the factor of porosity in hole, %;
0.90-the average density of paraffin under the normal temperature, g/cm
3
Described physical model framework material is made of kalzit, pierite and the Irish touchstone rock fiber of different-grain diameter;
Described kalzit, dolomitic granularity are greater than 60 orders, and particle size distribution meets the normal distribution feature, and the weight ratio of its framework material in model is between 25%～85%;
The thickness of described basalt fibre is about 6～12 μ m, and length is about 1～5mm, and its weight ratio in the framework material in model is not more than 1%;
The described material that is used to make carbonatite seam hole type physical models of reservoir can also comprise the physical model jointing compound;
Described jointing compound can comprise white lime and No. 625 cement, and wherein the white lime ratio that accounts for the model gross mass is no more than 15%, cement proportion 5%～15%; Described jointing compound can also comprise that ratio is 1%～5% minor glue agent water glass.
The described material that is used to make carbonatite seam hole type physical models of reservoir can also comprise other auxiliary material, and described other auxiliary material are the cement intensifier of implementation model intensity, and its ratio that accounts for the model gross mass is no more than 0.5% of cement consumption.
The method for making of the present invention's two carbonatite seam hole type physical models of reservoir is achieved in that
Described method comprises the steps:
1) makes the solution cavity of different size and form, the model in crack with Wood's metal and/or paraffin earlier;
2) treat model forming after, being higher than under 85 ℃ the temperature, Wood's metal and/or paraffin displacement are come out, form crack solution cavity with space structure.
In the described step 1),, utilize the model of Wood's metal and/or paraffin processing crack and solution cavity according to the spatial geometric shape and the moulded dimension of crack solution cavity, the model that processes is put into mould, the framework material that mixes of cast after concussion makes it filling evenly, tightens mould and at CO
2Dehydration is aging 10 days in the atmosphere;
Described step 2) in, the physical model of moulding being higher than under 85 ℃ the temperature, is carried out displacement with gases at high pressure earlier, collect the Wood's metal and the paraffin of displacing, and use the solvent cleaning model.
The effect of invention
Utilize this material composition can make up the carbonatite seam hole type physical models of reservoir of different size model, make its seepage flow feature, pore structure characteristic and poroperm characteristics and true reservoir cores similar, satisfy the needs of carbonatite seam hole type reservoir physical simulation.
Description of drawings
Fig. 1 is the solution cavity of different size and distribution in the model.
Fig. 2 utilizes the seam hole space distribution picture of CT scan in the artificial physical model of this material
Embodiment
The present invention mainly comprises the selection of framework material, mainly utilizes kalzit and pierite and a small amount of basalt fibre as the framework material that makes up physical model.Utilize white lime and cement and water glass as jointing compound.Utilize Wood's metal and paraffin and heavy bitumen matter as the material of making the crack solution cavity.Different proportionings can be made the seam hole form of different size and the physical model of intensity.
Because Wood's metal and paraffin have at high temperature and can become liquid, so the present invention's material of main part of selecting for use Wood's metal material and paraffin to make as the solution cavity crack.First solution cavity, the crack of making different size and form with Wood's metal and paraffin, wait whole model forming after, at high temperature Wood's metal and paraffin displacement are come out, formation has the crack solution cavity of space structure.
The selection of physical model framework material: the kalzit, pierite and the Irish touchstone rock fiber that adopt different-grain diameter are as framework material.Wherein, kalzit and pierite are as the main support material of physical model, and basalt fibre plays the effect that increases mold strength.
Wherein kalzit, dolomitic granularity are greater than 60 orders, and particle size distribution meets the normal distribution feature.Mass ratio in model is between 25%～85%, and wherein the thickness of basalt fibre is about 6～12 μ m, and length is about 1～5mm, and consumption is not more than 1% of gross mass.
The selection of physical model jointing compound: adopt white lime, No. 625 cement as main jointing compound, wherein the white lime ratio that accounts for the model gross mass is no more than 15%, cement proportion 5%～15%.Utilize water glass as the minor glue agent, ratio is 1%～5%.
Other auxiliary material: in order to guarantee the similarity of physical model and true core, other auxiliary material also comprise heavy bitumen matter, strengthen reinforcing agent.Heavy bitumen matter and paraffin one are used from fracture faces, realize the simulation in its strong oil-wet surface nature and bituminous matter filling crack.
Claims (9)
1. the manufacturing materials of carbonatite seam hole type physical models of reservoir is characterized in that:
Described material comprises the making material of main part and the physical model framework material of crack solution cavity in the physical model;
The making material of main part of crack solution cavity is selected from Wood's metal and/or paraffin in the described physical model.
2. the manufacturing materials of carbonatite seam as claimed in claim 1 hole type physical models of reservoir is characterized in that:
(1) consumption of described Wood's metal calculates according to following formula: M
A=V φ
V﹠amp; f8.34, in the formula:
M
A-Wood's metal consumption, g;
The cumulative volume of V-institute processing model, cm
3
φ
V﹠amp; fNeed in-institute the processing model with the crack of Wood's metal filling and the factor of porosity in hole, %;
8.34-the average density of Wood's metal, g/cm
3
(2) consumption of described paraffin calculates according to following formula: M
w=V φ
w0.90, in the formula:
M
w-Wood's metal consumption, g;
The cumulative volume of V-institute processing model, cm
3
φ
wNeed in-institute the processing model with the crack of paraffin filling and the factor of porosity in hole, %;
0.90-the average density of paraffin under the normal temperature, g/cm
3
3. the manufacturing materials of carbonatite seam as claimed in claim 2 hole type physical models of reservoir is characterized in that:
Described physical model framework material is made of kalzit, pierite and the Irish touchstone rock fiber of different-grain diameter.Become.
4. the manufacturing materials of carbonatite seam as claimed in claim 3 hole type physical models of reservoir is characterized in that:
Described kalzit, dolomitic granularity are greater than 60 orders, and particle size distribution meets the normal distribution feature, and the weight ratio of its framework material in model is between 25%～85%;
The thickness of described basalt fibre is about 6～12 μ m, and length is about 1～5mm, and its weight ratio in the framework material in model is not more than 1%.
5. the manufacturing materials of carbonatite seam as claimed in claim 3 hole type physical models of reservoir is characterized in that:
The described material that is used to make carbonatite seam hole type physical models of reservoir also comprises the physical model jointing compound;
Described jointing compound comprises white lime and No. 625 cement, and wherein the white lime ratio that accounts for the model gross mass is no more than 15%, cement proportion 5%～15%; Described jointing compound comprises that also ratio is 1%～5% minor glue agent water glass.
6. the manufacturing materials of carbonatite seam as claimed in claim 3 hole type physical models of reservoir is characterized in that:
The described material that is used to make carbonatite seam hole type physical models of reservoir also has other auxiliary material, and described other auxiliary material are the heavy bituminous matter, and heavy bitumen matter and paraffin one are used from fracture faces, realize its strong oil-wet surface nature; Heavy bitumen matter consumption is no more than 5% of paraffin consumption.
7. the manufacturing materials of carbonatite seam as claimed in claim 4 hole type physical models of reservoir is characterized in that:
The described material that is used to make carbonatite seam hole type physical models of reservoir also comprises the physical model jointing compound;
Described jointing compound comprises white lime and No. 625 cement, and wherein the white lime ratio that accounts for the model gross mass is no more than 15%, cement proportion 5%～15%; Described jointing compound comprises that also ratio is 1%～5% minor glue agent water glass;
The described material that is used to make carbonatite seam hole type physical models of reservoir also comprises other auxiliary material, and described other auxiliary material are the cement intensifier of implementation model intensity, and its ratio that accounts for the model gross mass is no more than 0.5% of cement consumption.
8. stitch the method for making of hole type physical models of reservoir as the carbonatite of one of claim 1～7, it is characterized in that described method comprises the steps:
1) makes the solution cavity of different size and form, the model in crack with Wood's metal and/or paraffin earlier;
2) treat model forming after, being higher than under 85 ℃ the temperature, Wood's metal and/or paraffin displacement are come out, form crack solution cavity with space structure.
9. the method for making of carbonatite seam as claimed in claim 8 hole type physical models of reservoir is characterized in that:
In the described step 1),, utilize the model of Wood's metal and/or paraffin processing crack and solution cavity according to the spatial geometric shape and the moulded dimension of crack solution cavity, the model that processes is put into mould, the framework material that mixes of cast after concussion makes it filling evenly, tightens mould and at CO
2Dehydration is aging 10 days in the atmosphere;
Described step 2) in, the physical model of moulding being higher than under 85 ℃ the temperature, is carried out displacement with gases at high pressure earlier, collect the Wood's metal and the paraffin of displacing, and use the solvent cleaning model.
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