CN104153766A - Rock seam hole type oil deposit tracer-agent-injection injection-production model and manufacturing method and application thereof - Google Patents
Rock seam hole type oil deposit tracer-agent-injection injection-production model and manufacturing method and application thereof Download PDFInfo
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Abstract
The invention provides a rock seam hole type oil deposit tracer-agent-injection injection-production model and a manufacturing method and application of the rock seam hole type oil deposit tracer-agent-injection injection-production model. A carbonate rock is cut into a square plate, on the surface of the plate, the sizes of seam holes in the model are calculated according to a set proportional scale on the basis of the distribution condition of the seam holes on an actual oil deposit earthquake curvature graph, and the rock plate is etched to obtain cracks or caves. The two sides of the etched rock plate are respectively coated with adhesives and are then respectively covered with transparent organic glass, pressed and sealed, set screws are arranged on related portions, and the joints are coated with glue and sealed. Holes are drilled in different portions of the model according to the requirement for setting simulation well positions, valves are installed, different types of well position distribution of seam hole oil deposit is simulated, and then the rock seam hole type oil deposit tracer-agent-injection injection-production model is obtained. By means of the model, the test process of real seam hole oil deposit injection-production well network tracer agent injection can be well simulated, and guidance is provided for the research on the oil-water relation of seam hole oil deposit.
Description
Technical field
The invention belongs to seam hole reservoir evaluation technical field, relate in particular to a kind of rock seam hole type oil reservoir injection tracer note and adopt model and preparation method thereof and application.
Background technology
Can underground seam hole connectivity types, oil water relation know that understanding is that can seam hole type Carbonate Reservoir realize one of basic condition of Efficient Development.Carbonate Crack Reservoir reservoir has very strong non-homogeneity, cave, fracture development, connective situation complexity.Because oil reservoir many places are in underground hundreds of to the thousands of meters of degree of depth, people cannot observe directly the underground connection situation between the oil reservoir well of seam hole.The method of research seam hole oil reservoir Connectivity Properties mainly contains production dynamic data analysis method, reservoir pressure system analysis method and analysis by synthesis method at present.In addition, between well, tracer flow also starts to be applied to the research of stitching hole oil reservoir Connectivity Properties.After injecting by tracer, at the condition monitoring of oil reservoir different directions output, can analyze more intuitively seam hole oil reservoir interwell communication character, this technology is that research seam hole oil reservoir Connectivity Properties has one of technology of higher application prospect at present.Due to the complexity of subsurface deposit, between the well that Oil Field note tracer monitoring arrives, spike tracing pattern is different, the main field personnel of dependence passes through spike curve and corresponding well break joint hole mode of communicating between the well of micro-judgment different shape, without effective ways, on-the-spot judged result is verified at present.In addition, Oil Field note tracer test, invest large, long in time limit, disturbing factor is many, cannot meet the theoretical research needs to noting tracer between Carbonate Crack Reservoir well, be therefore necessary to carry out simulated field note tracer test process by indoor making carbonate rock fractured cave model.
The industry that is produced on of carbonate rock fractured cave model is a technical barrier always.Comprehensive prior art, stitches at present hole model production method and mainly contains: 1. poly (methyl methacrylate) plate etching seam hole; 2. true core etching; 3. marble slab etching seam hole; 4. the cementing rear melting method of Wood's metal, paraffin or ice cube mold.The problem that these methods exist comprises: adopt glass or organic glass as cast material, with stitching hole oil reservoir with rock forming mineral component CaCO
3be that main truth differs greatly, Visualization Model is not withstand voltage simultaneously; Also have and adopt the on-the-spot gained limestone of coring to carry out modelling, but exist with high costsly, limestone machine-shaping difficulty, be not easy to the problems such as experiment observation.
Summary of the invention
Main purpose of the present invention is to provide a kind of rock seam hole type oil reservoir injection tracer note to adopt model and preparation method thereof, is intended to solve that existing carbonate rock fractured cave model and truth differ greatly, with high costs, machine-shaping is difficult and be not easy to test the problems such as observation.
A further object of the present invention is to provide above-mentioned rock seam hole type oil reservoir injection tracer note to adopt the application of model aspect the type Carbonate Reservoir note tracer experimental evaluation of seam hole.
The present invention is achieved in that a kind of rock stitches hole type oil reservoir injection tracer and notes the preparation method who adopts model, comprises the following steps:
(1) select carbonate rock stone material to cut into square sheet material;
(2) carbonate rock plate surface taking on actual oil reservoir earthquake curvature chart, stitch hole distribution situation as basis, according to the seam hole size on preset proportion chi computation model, and etching obtains crack or solution cavity on rock sheet material;
(3) bonding agent is all coated on the rock sheet material two sides after etching, with transparent organic glass covering press seal, in region of interest, hold-down screw the sealing of butt joint gluing is installed;
(4) at the different parts of model according to the boring that needs of simulation well location setting, mounted valve, oil reservoir different well location in simulation seam hole distributes, and obtains rock seam hole type oil reservoir injection tracer note and adopts model.
Preferably, in step (1), described carbonate rock stone material comprises high-purity marble, limestone, calcite or drilling and coring delivery gained rock core.
Preferably, in step (3), four jiaos and middle part that described region of interest is model, the quantity of the hold-down screw of installing on described middle part is with energy fixed model, and hold-down screw installation position avoids stitching space, hole.
The present invention further provides the rock seam hole type oil reservoir injection tracer note being obtained by above-mentioned preparation method and adopted model.
The present invention further provides above-mentioned rock seam hole type oil reservoir injection tracer note and adopted the application of model aspect the type Carbonate Reservoir note tracer experimental evaluation of seam hole, comprised the following steps:
(1) detect after described model leakproof, experimentally need to determine different injections and output well location, simulate different seam hole mode of communicating;
(2) configure certain density tracer solution, this tracer solution is injected from producing well location once;
(3) pump into distilled water, distilled water pumps into speed and converts and obtain according to the injection rate of on-the-spot tracer solution, in corresponding output well location sampling, according to the sequencing of sampling, sample is numbered;
(4) when sampling, with spectrophotometer, the absorbance of the experiment institute's tracer-containing in each sample of getting is tested, the absorbance numerical value that test is obtained is scaled tracer concentration or quality by standard correction curve;
(5) reach termination of pumping after quantity of sampling quantity, stop experiment, the tracer concentration obtaining according to chemical examination or qualitative data are drawn the tracer concentration-time curve or the accumulation output quality-time curve that under different experimental conditions, obtain, and curve is studied and evaluated.
Preferably, also comprise afterwards step in step (5): emit the aqueous solution being detained in model, the large displacement flush model of turn on pump is not until tracer residual concentration can cause remarkable impact to experiment next time.
Preferably, in step (1), the leak detection of described model comprises following concrete steps:
Link model and intermediate receptacle, open terminal valve, and the intermediate receptacle by enough distilled water is housed respectively stitches space, hole to pumping into distilled water flushing model in described model; Close each outlet valve, to applying the pressure of 0.5MPa in model, whether inspection model there is seepage, if model does not exist seepage to prepare subsequent experimental.
Than the shortcoming and defect of prior art, the present invention has following beneficial effect:
(1) rock seam provided by the invention hole type oil reservoir injection tracer note is adopted model and is more approached oil reservoir seam hole, real seam hole distributional pattern, the test process of Reality simulation seam hole oil reservoir flooding pattern note tracer preferably; In the tracer test process of selecting, lose little, safety non-toxic; The indoor detection method of tracer test sample is simple, convenient operation.
(2) the present invention simulates seam hole oil reservoir injection tracer test process by experiment, can set up spike theory characteristic curve between the well under different Connectivity Properties, and study the impact of different factors on Carbonate Crack Reservoir note tracer test result, for research seam hole oil reservoir oil water relation provides guidance.
Brief description of the drawings
Fig. 1 stitches hole oil reservoir wellblock earthquake curvature chart in the embodiment of the present invention 1;
Fig. 2 is carbonate rock fractured cave model in the embodiment of the present invention 1;
Fig. 3 is the partial enlarged drawing of carbonate rock fractured cave model in Fig. 2;
Fig. 4 notes tracer thing mould experimental facilities structural representation in the embodiment of the present invention 2;
Fig. 5 is pipeline in the embodiment of the present invention 2-solution cavity note tracer illustraton of model;
Fig. 6 is tracer concentration-time history in the embodiment of the present invention 3;
Fig. 7 is zero dimension accumulation output quality-time history in the embodiment of the present invention 3.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Embodiment 1 rock seam hole type oil reservoir injection tracer is noted the preparation method who adopts model, comprises the following steps:
(1) select the carbonate rock stone material of certain size to cut into the sheet material with length and width and thickness;
In step (1), model material main component is CaCO
3, can be that high-purity marble can be also limestone or calcite and drilling and coring delivery gained carbonate rock rock core.In addition, moulded dimension is changeable, and the model of different Connectivity Properties can be made into single injector-producer pair form, or the form of making different connectivity types set.In step (1), more specifically, select white marble material, marble calcium carbonate content >90%, cut into there is long 90cm, the regular sheet material of wide 60cm and thickness 1.5cm.
(2) at carbonate rock plate surface to stitch hole distribution situation on actual oil reservoir earthquake curvature chart as basis, according to the seam hole size on certain scale computation model, and etching obtains crack or the solution cavity of certain size on rock sheet material;
In step (2), more specifically, be distributed as basic plate with the described seam of the earthquake curvature chart hole of oil reservoir wellblock, seam hole, X oil field, as shown in Figure 1, etching seam, pipeline or solution cavity on marble slabs.X oil reservoir earthquake curvature chart explicitly descends crack width 0.2～1m, karst or underground river width 3～6m, solution cavity diameter 50～100m, according to the scale of 1:1000, determine and above model, stitch wide 0.2～1mm, karst 3～6mm, solution cavity diameter 50～100mm, as shown in Figure 2 (specification is: long 90cm × wide 60cm × thick 1.5cm); Seam hole distributed quantity on model need to do suitable increase and decrease according to experiment.
(3) bonding agent is all coated on the rock sheet material two sides after etching, with transparent organic glass covering press seal, (avoid stitching space, hole four jiaos of model and middle part, quantity is as the criterion with energy fixed model) hold-down screw the sealing of butt joint gluing are installed, as shown in Figure 2.
(4) at the different parts of model according to the boring that needs of simulation well location setting, mounted valve, as shown in Figure 3, oil reservoir different well location in simulation seam hole distributes, obtain rock seam hole type oil reservoir injection tracer note and adopt model, this model is arranged on the fixed support of steel for subsequent use.
Embodiment 2 stitches hole type Carbonate Reservoir note tracer experimental evaluation
In embodiments of the present invention, as shown in Figure 4, tracer injection device comprises:: 0.01～10ml/min trace constant speed pump 1; The intermediate receptacle 2 of capacity 2000mL; Pressure meter 3 (range 0.25MPa); Pipeline (3m flexible rubber hose); Sample assay device: UV-1800 type ultraviolet specrophotometer; Sampling material: the common medical blood taking pipe of volume 3ml is a collection of; Graduated cylinder 5.Wherein, constant speed pump 1, intermediate receptacle 2, pressure meter 3, rock seam hole type oil reservoir injection tracer note adopts model 4 and graduated cylinder 5 connects successively.
Tracer requires: background is low, sensitivity for analysis is high; Under reservoir condition, there is enough chemistry, biology and heat stability; Be insoluble to in-place oil, do not react with stratum mineralized water; On carbonate rock, adsorb little; Noiseless each other while use simultaneously; Originate wide, inexpensive, safety and environmental protection.The on-the-spot tracer using has chemical tracer, radioactive tracer, non radioactive isotope tracer, micro substance tracer etc.In desk research, consider the problem such as reuse of detection difficulty, safety and the experimental model of instrument, in research adopt nontoxic chemical tracer as injected media more, the advantage such as there is safely, be easy to detect, reproducible.
The type Carbonate Reservoir note tracer experimental evaluation of seam hole, comprises the following steps:
(1) detect after described model leakproof, experimentally need to determine different injections and output well location, simulate different seam hole mode of communicating;
In step (1), the leak detection of model comprises following concrete steps: delivery side of pump end is connected with the related valve on model by pipeline, by the intermediate receptacle of 2000ml clear water is housed, respectively stitch space, hole with the flow velocity of 3ml/min to pumping into distilled water flushing in model, discharge the impurity in space from related valve; Close each outlet valve, the model 0.5MPa that builds the pressure, whether good seal of the each position of inspection model; If model does not exist seepage to prepare subsequent experimental.
The model of different seams hole mode of communicating can be made into single injector-producer pair form, in embodiments of the present invention for making the form of different connectivity types set.
(2) configure certain density tracer solution, this tracer solution is injected from producing well location once;
In step (2), select KBr as carbonate rock fractured cave model experiment tracer.Required reagent comprises: toluene-sodium-sulfonchloramide, phenol red, glacial acetic acid, sodium thiosulfate, sodium acetate be analyze pure; KBr, spectroscopic pure.ESJI20A electronic balance.The reagent compound method providing according to document " improving one's methods of KBr type tracer detection method ", preparation analytical test related reagent, specific as follows:
1. phenol red solution, accurately weighs the phenol red and 1.2 grams of sodium carbonate of 2.4g, is settled to 1000mL with distilled water in volumetric flask.
2. toluene-sodium-sulfonchloramide solution, accurately weighs 2g toluene-sodium-sulfonchloramide, is settled to 1000mL with distilled water in volumetric bottle, leaves in brown bottle for subsequent use.
3. acetic acid-sodium acetate buffer solution, accurately weighs 164g sodium acetate trihydrate and is dissolved in distilled water, adds 84mL acetic acid, with distilled water diluting to 1000mL.
4. KBr solution (1mg/L), according to the measurement category of ultraviolet specrophotometer, accurately weighs 1gKBr in the present embodiment, is settled to 1000mL with distilled water in volumetric flask, is stored in brown bottle for subsequent use.
5. hypo solution, accurately weighs 25g Sodium Thio Sulphate(Anhydrous), for subsequent use with distilled water constant volume in 1000mL volumetric flask.
Experimental simulation be the note tracer process under pipeline (6mm)-solution cavity (50mm) mode of communicating, model is as shown in Figure 5.Open port of export valve, with syringe, once from entrance injection 3mLKBr tracer solution, sampler (3ml heparin tube) samples at the port of export.
(3) pump into distilled water, distilled water pumps into speed and converts and obtain according to the injection rate of tracer solution, in corresponding output well location sampling, according to the sequencing of sampling, sample is numbered;
In step (3), after note tracer solution, pump into distilled water with the constant speed of 0.5ml/min and replace tracer solution slug, at the port of export, every 90s samples once, the about 0.75mL of every sub-sampling; Sequencing according to sampling is numbered sample, samples altogether 150.
(4) when sampling, with spectrophotometer, the absorbance of the experiment institute's tracer-containing in each sample of getting is tested, the absorbance numerical value that test is obtained is scaled tracer concentration or quality by standard correction curve;
In step (4), absorbency detection method is as follows: get 20mL potassium bromide solution, join in 25mL volumetric flask, add 0.3mL phenol red solution and 1mL acetic acid-sodium acetate buffer solution, add 2mL toluene-sodium-sulfonchloramide solution, start accurate timing with stopwatch, add distilled water to 25mL scale place, shake up.Rapidly the solution in volumetric flask is poured in cuvette, made reference with distilled water, in the time of 55s, read light absorption value in 592nm place, the sample absorbance recording is as shown in table 1:
Table 1 sample segment test absorbance and concentration table
| Sampling sequence number | Absorbance/cd | Concentration mg/L | Quality mg | Mass accumulation mg | Sampling sequence number | Absorbance/cd | Concentration mg/L | Quality mg | Mass accumulation mg |
| 1 | 0.193 | 24.63 | 0.018 | 0.018 | 21 | 0.177 | 18.68 | 0.014 | 0.418 |
| 2 | 0.201 | 27.60 | 0.021 | 0.039 | 22 | 0.209 | 30.58 | 0.023 | 0.441 |
| 3 | 0.2 | 27.23 | 0.020 | 0.059 | 23 | 0.204 | 28.72 | 0.022 | 0.462 |
| 4 | 0.214 | 32.43 | 0.024 | 0.083 | 24 | 0.203 | 28.35 | 0.021 | 0.484 |
| 5 | 0.203 | 28.35 | 0.021 | 0.105 | 25 | 0.207 | 29.83 | 0.022 | 0.506 |
| 6 | 0.185 | 21.65 | 0.016 | 0.121 | 26 | 0.189 | 23.14 | 0.017 | 0.523 |
| 7 | 0.199 | 26.86 | 0.020 | 0.141 | 27 | 0.195 | 25.37 | 0.019 | 0.542 |
| 8 | 0.197 | 26.12 | 0.020 | 0.161 | 28 | 0.19 | 23.51 | 0.018 | 0.560 |
| 9 | 0.202 | 27.97 | 0.021 | 0.182 | 29 | 0.178 | 19.05 | 0.014 | 0.574 |
| 10 | 0.2 | 27.23 | 0.020 | 0.202 | 30 | 0.193 | 24.63 | 0.018 | 0.593 |
| 11 | 0.193 | 24.63 | 0.018 | 0.221 | 31 | 0.187 | 22.40 | 0.017 | 0.609 |
| 12 | 0.213 | 32.06 | 0.024 | 0.245 | 32 | 0.196 | 25.74 | 0.019 | 0.629 |
| 13 | 0.198 | 26.49 | 0.020 | 0.264 | 33 | 0.182 | 20.54 | 0.015 | 0.644 |
| 14 | 0.188 | 22.77 | 0.017 | 0.282 | 34 | 0.189 | 23.14 | 0.017 | 0.662 |
| 15 | 0.187 | 22.40 | 0.017 | 0.298 | 35 | 0.194 | 25.00 | 0.019 | 0.680 |
| 16 | 0.195 | 25.37 | 0.019 | 0.317 | 36 | 0.235 | 40.24 | 0.030 | 0.710 |
| 17 | 0.203 | 28.35 | 0.021 | 0.339 | 37 | 0.182 | 20.54 | 0.015 | 0.726 |
| 18 | 0.2 | 27.23 | 0.020 | 0.359 | 38 | 0.219 | 34.29 | 0.026 | 0.752 |
| 19 | 0.221 | 35.04 | 0.026 | 0.385 | 39 | 0.245 | 43.96 | 0.033 | 0.785 |
| 20 | 0.193 | 24.63 | 0.018 | 0.404 | 40 | 0.19 | 23.51 | 0.018 | 0.802 |
(5) reach termination of pumping after quantity of sampling quantity, stop experiment, emit the aqueous solution being detained in model, the large displacement flush model of turn on pump is not until tracer residual concentration can cause remarkable impact to experiment next time.The tracer concentration obtaining according to chemical examination or qualitative data are drawn the tracer concentration-time curve or the accumulation output quality-time curve that under different experimental conditions, obtain, and curve is studied and evaluated.
In above-mentioned steps, repeat above-mentioned (1)～(4) step according to need to determine different mode of communicating or the injection parameter of research, complete different experiments.This real case simulation at same pipeline---under solution cavity mode of communicating, the note tracer process under 0.5ml/min and 0.8ml/min injection rate.
Embodiment 3 experimental result evaluations
The sample Br-light absorption value obtaining according to chemical examination checks in bromide quality in colorimetric cylinder on calibration curve, calculates corresponding KBr concentration (quality) according to formula 1.
In formula (1):
---the mass concentration of bromide in water sample, mg/L;
Bromide content in m---the colorimetric cylinder that checks in from calibration curve, μ g;
V---the volume of institute's water sampling, mL.
The sample segment absorbance recording and concentration are as above in embodiment 2 shown in table 1.
Draw the tracer concentration-time curve under different experimental conditions according to the sample concentration data that calculate.Taking accumulative total output quality corresponding to the 1st and the 150th sample as end points, tracer qualitative data to accumulation output carries out zero dimension processing, obtain zero dimension accumulation output quality-time curve, carry out relevant evaluation as shown in Figure 6 and Figure 7, and then to the spike production curve feature under different experimental conditions.
Example test result analysis: as shown in Figure 6, from injecting tracer to breakthrough, have the longer time; The experiment tracer breakthrough time that injection rate is high is faster than low speed, and peak concentration occurs early, and concentration curve entirety is injected situation higher than low speed, and spike curve entirety peak shape is steeper.Analyze and produce the reason of difference: think in pipeline-cavern system and inject after tracer, the diluting effect of tracer is better than flow at high speed under the low speed.As shown in Figure 7, under different in flow rate there is larger difference in the zero dimension accumulation output quality tracing pattern of tracer, and the output quality that low speed injects is less in the first half section growth rate of test, is positioned at y=x bottom in the majority; In high speed injection situation, output quality is larger in first half section growth rate, and the time reflects tracer speed of response is fast, and diffusion dilution degree is lower.
The foregoing is only preferred embodiment of the present invention, not in order to restriction invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (7)
1. rock seam hole type oil reservoir injection tracer is noted a preparation method who adopts model, it is characterized in that comprising the following steps:
(1) select carbonate rock stone material to cut into square sheet material;
(2) carbonate rock plate surface taking on actual oil reservoir earthquake curvature chart, stitch hole distribution situation as basis, according to the seam hole size on preset proportion chi computation model, and etching obtains crack or solution cavity on rock sheet material;
(3) bonding agent is all coated on the rock sheet material two sides after etching, with transparent organic glass covering press seal, in region of interest, hold-down screw the sealing of butt joint gluing is installed;
(4) at the different parts of model according to the boring that needs of simulation well location setting, mounted valve, oil reservoir different well location in simulation seam hole distributes, and obtains rock seam hole type oil reservoir injection tracer note and adopts model.
2. rock seam as claimed in claim 1 hole type oil reservoir injection tracer is noted the preparation method who adopts model, it is characterized in that, in step (1), described carbonate rock stone material comprises high-purity marble, limestone, calcite or drilling and coring delivery gained rock core.
3. rock seam as claimed in claim 1 hole type oil reservoir injection tracer is noted the preparation method who adopts model, it is characterized in that, in step (3), described region of interest is four jiaos and middle part of model, the quantity of the hold-down screw of installing on described middle part is with energy fixed model, and hold-down screw installation position avoids stitching space, hole.
4. rock seam hole type oil reservoir injection tracer note is adopted a model, it is characterized in that, obtains by preparation method described in the claims 1～3 any one.
5. rock seam claimed in claim 4 hole type oil reservoir injection tracer note is adopted the application of model aspect the type Carbonate Reservoir note tracer experimental evaluation of seam hole, it is characterized in that, comprises the following steps:
(1) detect after described model leakproof, experimentally need to determine different injections and output well location, simulate different seam hole mode of communicating;
(2) configure certain density tracer solution, this tracer solution is injected from producing well location once;
(3) pump into clear water, clear water pumps into speed and converts and obtain according to the injection rate of tracer solution, in corresponding output well location sampling, according to the sequencing of sampling, sample is numbered;
(4) when sampling, with spectrophotometer, the absorbance of the experiment institute's tracer-containing in each sample of getting is tested, the absorbance numerical value that test is obtained is scaled tracer concentration or quality by standard correction curve;
(5) reach termination of pumping after quantity of sampling quantity, stop experiment, the tracer concentration obtaining according to chemical examination or qualitative data are drawn the tracer concentration-time curve or the accumulation output quality-time curve that under different experimental conditions, obtain, and curve is studied and evaluated.
6. rock seam as claimed in claim 5 hole type oil reservoir injection tracer note is adopted the application of model aspect the type Carbonate Reservoir note tracer experimental evaluation of seam hole, it is characterized in that, also comprise afterwards step in step (4): emit the aqueous solution being detained in model, rinse the large displacement flush model of turn on pump until tracer residual concentration can not cause remarkable impact to experiment next time.
7. rock seam as claimed in claim 6 hole type oil reservoir injection tracer note is adopted the application of model aspect the type Carbonate Reservoir note tracer experimental evaluation of seam hole, it is characterized in that, in step (1), the leak detection of described model comprises following concrete steps:
Link model and intermediate receptacle, open terminal valve, and the intermediate receptacle by enough clear water are housed rinses model and respectively stitches space, hole to pumping into clear water in described model; Close each outlet valve, to applying the pressure of 0.5MPa in model, whether inspection model there is seepage, if model does not exist seepage to prepare subsequent experimental.
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