CN105672993B - The detection method and system of oriented perforating bottom water water logging and application - Google Patents
The detection method and system of oriented perforating bottom water water logging and application Download PDFInfo
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- CN105672993B CN105672993B CN201511019205.5A CN201511019205A CN105672993B CN 105672993 B CN105672993 B CN 105672993B CN 201511019205 A CN201511019205 A CN 201511019205A CN 105672993 B CN105672993 B CN 105672993B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
Abstract
The present invention provides the detection method and system and application of a kind of oriented perforating bottom water water logging, method includes the following steps: after 1) being passed through heat into oriented perforating three-dimensional physical model, acquires the real time temperature of oil reservoir test point and the real time temperature of water layer test point；2) first time-temperature curve is obtained according to the real time temperature of water layer test point, the first fitting a straight line is obtained according to first time-temperature curve, the slope of the first fitting a straight line is first slope；3) the second time-temperature curve is obtained according to the real time temperature of oil reservoir test point, the second fitting a straight line is obtained according to the second time-temperature curve；The third fitting a straight line of second time-temperature curve is obtained according to first slope；4) time corresponding to the intersection point of the second fitting a straight line and third fitting a straight line is obtained.The present invention only needs to analyze each measuring point temperature and changes with time relationship, that is, can recognize the process that bottom water promotes, to realize the detection of bottom water water logging.
Description
Technical field
The present invention relates to the detection method of oil exploitation technology more particularly to a kind of oriented perforating bottom water water logging and it is
System and application.
Background technique
Oriented perforating be a kind of Crude viscosity be greater than 50mPas or degassed crude viscosity be greater than 100mPas and
Water layer is distributed in the special oil reservoir that oil reservoir is held up below oil reservoir, and sizable ratio, rich reserves are occupied in heavy crude reservoir.Needle
To such oil reservoir, oil recovery by heating method is the method generallyd use at this stage, i.e., reduces crude oil by injecting thermal energy into stratum
Viscosity improves crude oil fluidity to improve using efficiency.But as the exploitation of oil reservoir, formation pressure are gradually reduced, make original
The water cone of mound shape is deformed into for the oil-water interfaces of horizontality, water cone constantly rises, and breaks through and enters producing well bottom, causes grease same
It produces, reduces oil yield, this bottom water is called bottom water coning, the phenomenon is to oil reservoir with the tapered process being longitudinally propelling of recovering the oil
It is very unfavorable to exploit.
In order to reasonably be developed to oriented perforating, cost of winning and exploitation risk are reduced, is reinforced to bottom water cone
Into control, it is necessary to deepen research to bottom water coning rule, casing programme and well pattern tune are taken in monitoring bottom water propulsion in time
The measures such as whole, working system and mode adjust, reservoir reconstruction inhibit bottom water coning, achieve the purpose that water-control oil-increasing, thus rationally
Effectively develop oriented perforating.
Physical analogy is to study a kind of conventional means of oriented perforating, and three-dimensional physical simulation tests artificial reproduction bottom
The development process of water heavy crude reservoir, the seepage flow characteristics of the practical oil reservoir of more true simulation or oil well, convenient for understanding water cone or water
The formation and development of ridge studies the influence of oil deposit parameter, oil well geometrical factor and external production controllable parameter to development effectiveness, is
It formulates oriented perforating development strategy, different development phases counter-measure and steady oil control water scheme and important evidence is provided.Currently,
Saturation intent is mainly used for the realization that bottom water water logging in oriented perforating three-dimensional physical simulation detects, that is, utilizes one
The resistivity probe of fixed number amount acquires resistivity data in bottom water inspissated pool model, and bottom water is calculated by Archie formula
The detection of bottom water water logging during bottom water reservoir physical analogy is realized in the distribution of oil reservoir water saturation.
Since oil recovery by heating method is the major technique technique of current exploitation oriented perforating, oriented perforating
It is often in the condition of high temperature, but resistivity probe cannot be suitable for hot environment very well, and Viscosity of Heavy Crude Oil is high, three dimensional physical
Resistivity probe is often adhered in simulation process, measurement accuracy is caused to decline, or even can not work normally, therefore saturation degree side
Method cannot meet the requirement of oriented perforating three-dimensional physical simulation bottom water water logging detection very well, be difficult to become desk research bottom water
A kind of generally used method of Development of Viscous Crude Oil dynamic.
Summary of the invention
The present invention provides the detection method and system and application of a kind of oriented perforating bottom water water logging, existing for overcoming
Using the defect that saturation intent is not high to oriented perforating bottom water water logging detection information accuracy in technology.
The detection method of oriented perforating bottom water water logging provided by the invention uses the water logging of temperature detection bottom water, utilizes temperature
The difference of rate of change is spent to identify that bottom water promotes, and according to energy-balance equation, has derived the change of oriented perforating grease temperature
Change equation, the detection of oriented perforating bottom water water logging is worth with great Technical Reference.
The detection system of oriented perforating bottom water water logging provided by the invention is easy to implement to the temperature change of oil reservoir
The detection of oriented perforating bottom water water logging is realized in monitoring so as to the variation by temperature.
Technology of the invention is implemented using oriented perforating three-dimensional physical simulation as optimized integration, by bottom water viscous crude oil
It hides examinations method in three-dimensional physical model and realizes the detection for oriented perforating bottom water water logging.Oriented perforating
The design of three-dimensional physical simulation is based on similar three theorem, and using dimension similar concept as foundation, each physical quantity is all in accordance with phase
It is described like ratio.Jie of model needs the three-dimensional oriented perforating laboratory model and mining site prototype proportionally established
Matter condition, steric requirements and power act on that each corresponding position is similar, and fundamental equation, primary condition and boundary condition are all
Meet the similarity criterion with dimensionless expressed as parameters, therefore can be effectively to oriented perforating by three-dimensional physical simulation
Simulation test is carried out, while the result of the simulation test can really reflect the relevant information of mining site oil reservoir prototype.
The present invention provides a kind of detection method of oriented perforating bottom water water logging, the step carried out including following sequence
It is rapid:
1) after being passed through heat into oriented perforating three-dimensional physical model, the real time temperature and water of oil reservoir test point are acquired
The real time temperature of layer test point, wherein the oriented perforating three-dimensional physical model includes bottom aquifer and oil reservoir, the oil reservoir
Test point is in the oil reservoir, and the water layer test point is in the bottom aquifer；
2) first time-temperature curve is obtained according to the real time temperature of the water layer test point, according to the first time-
Temperature curve obtains the first fitting a straight line, and the slope of first fitting a straight line is first slope；
3) the second time-temperature curve is obtained according to the real time temperature of the oil reservoir test point, it is m- when according to described second
Temperature curve obtains the second fitting a straight line, and the slope of second fitting a straight line is the second slope；
The third fitting a straight line of second time-temperature curve is obtained according to the first slope；
4) time corresponding to the intersection point of second fitting a straight line and third fitting a straight line is obtained.
What each meaning to the various operations of oil reservoir of being related to below carried out in oriented perforating three-dimensional physical model
Operation.
Since the bottom water water logging carried out the present invention be directed to reservoir temperature variation when oil recovery by heating method detects,
Carry out the initial of bottom water water logging detection, it is necessary first to inject heat into oil reservoir, the viscosity enhancing viscous crude of viscous crude can either be reduced
Mobility make crude oil from producing well output, and reservoir temperature can be made to change, specifically, can be by injection well to peace
Hot steam or hot water etc. are injected in oil reservoir equipped with temperature sensor.After injecting heat, temperature in oil reservoir can with when
Between constantly change and shown by temperature sensor, therefore can recorde the real time temperature of oil reservoir, i.e. record formation test
Temperature of the point at each time point.In general, being passed through and for reality for heat can be stopped after oil reservoir production simulation
The monitoring record of Shi Wendu.Since current temp probe related process maturation is perfect, temp probe can be held under the high temperature conditions
Continuous normally to work, at low cost, small in size, precision is high, can carry out thermometric simultaneously in batches, therefore in three-dimensional physical simulation process
Middle temperature data is very reliable and is easy to obtain.
Due to the detection work that the present invention be directed to carry out before true oil reservoir exploitation on the spot, that is to say, that opened on the spot
Need to go to detect by means of the present invention the specific moment that certain points are flooded in true oil reservoir when exploiting on the spot before adopting,
For example, when exploiting on the spot therefore the specific time etc. that horizontal well toe-end is flooded is carrying out three dimensional physical mould of the invention
When quasi- detection, the point (point typically in oil reservoir) at the specific water logging moment known can will be wanted as this in exploitation on the spot
Oil reservoir test point in invention detection method simultaneously carries out the installation of temperature sensor in the oil reservoir test point, so as to be somebody's turn to do
The temperature change of oil reservoir test point.
Detection method of the invention also introduces reference, be used to oil reservoir test point the postflood temperature change of bottom water into
Row detection reference, i.e., can be more optionally as water layer test point and using the water layer test point as reference point in bottom aquifer.
Since the water layer test point is constantly in water logging state, theoretically oil reservoir test point its state after being flooded should be surveyed with water layer
The state consistency of pilot, therefore reference of the water layer test point as the oil reservoir test point after being flooded is chosen, and by water layer
The real time temperature of test point mounting temperature sensor record water layer test point.With the injection of heat, test point in oil reservoir
Temperature constantly changes at any time, by temperature sensor be able to record the test point in oil reservoir in the temperature of different time,
Therefore can using accumulated time as abscissa, temperature as ordinate, according to water layer test point different time not equality of temperature
Degree draws the first time-temperature curve of water layer test point.First time-the temperature curve clearly reflects from being passed through heat
Afterwards, the temperature of water layer test point changes with time.In order to reflect the variation tendency of the water layer test point, can to this first
Time-temperature curve carries out straight line fitting and makes the first fitting a straight line, and the slope of first fitting a straight line is first slope, this
One slope is the heating rate of water layer test point.
It can be done in the reference axis of first time-temperature curve fuel-displaced for the ease of data processing with reference to aforesaid operations
Second time-temperature curve of layer test point, if there is water logging situation in the oil reservoir test point, the oil reservoir test point
Second time-temperature curve will appear a turnover trend, caused by the turnover trend is just because of water logging, second before turnover
Time-temperature curve is the heating curve that oil reservoir test point is not flooded, and the second time-temperature curve after turnover is oil reservoir survey
The heating curve that pilot is flooded, and the second fitting a straight line herein is done for the second time-temperature curve before turnover
, the slope of second fitting a straight line is the second slope, which is heating of the oil reservoir test point when not being flooded
Rate.
Theoretically, since being flooded the oil reservoir test point, heating rate is consistent with the heating rate of water layer test point.
Therefore, third fitting a straight line can be made on the second time-temperature curve after turnover according to first slope, third fitting
Straight line is the fitting a straight line of the second time-temperature curve after turnover.For the ease of draw third fitting a straight line, can directly by
The translation of first fitting a straight line with the second time-temperature curve until be fitted, to generate third fitting a straight line.
At this point, the second fitting a straight line intersects with third fitting a straight line, intersection point (the i.e. turnover of the second time-temperature curve
Point) in the abscissa corresponding time of reference axis be the oil reservoir test point the bottom water water logging time, that is, be passed through heat when
Start at quarter to calculate, after the duration of the water logging time, which bottom water water logging occurs, the intersection point, that is, oil reservoir test point
Start the water logging point of bottom water water logging.It, can be as the variation of time be gradually by bottom water water since oil reservoir test point is in temperature-rise period
It floods, therefore the second time-temperature curve will appear apparent turning point before and after water logging, which is water logging point, the water logging point
Time when the corresponding time is the oil reservoir test point water logging, before the bottom water water logging time, the oil reservoir test point not by
Water logging.Detection method through the invention can know oil reservoir test point specifically by the time point of bottom water water logging, therefore, Ke Yitong
It crosses this experimental method to detect the water logging of oil reservoir test point, formulates reasonable development strategy, postpone the water logging time of test point, surely
Oil control water, improves oil recovery rate.
The present invention does not limit the number of test point, when to the progress bottom water water logging of N number of (N >=1) oil reservoir test point to be detected
When detection, it is only necessary to by (N+1) a temperature sensor to the real time temperature of N number of oil reservoir test point and 1 water layer test point into
Row record, by above-mentioned data processing, can get the specific water logging time of N number of oil reservoir test point.
Herein it should be noted that the first fitting a straight line referred in the present invention, the second fitting a straight line and third fitting
Straight line is the fitting to first time-temperature curve or the second time-temperature curve, therefore is surveyed to further increase oil reservoir
The measuring accuracy of pilot water logging time, the present invention preferably the first fitting a straight line, the second fitting a straight line and third fitting a straight line
Degree of fitting R2Not less than 0.85, wherein work as R2When equal to 1, degree of fitting highest.
Since water logging situation can all occur in not all oil reservoir test point, if be moved to by the first fitting a straight line
Found during second time-temperature curve first fitting a straight line can not become the second time-temperature curve fitting it is straight
Line (that is its degree of fitting R2< 0.75), i.e., second time-temperature curve can not be obtained according to the first slope
Third fitting a straight line, then may determine that water logging will not occur for the oil reservoir point.
The detection method of oriented perforating bottom water water logging of the invention is on the basis of three-dimensional physical simulation temperature field data
On, it is only necessary to processing analyzes temperature at each test point and changes with time relationship, that is, can recognize the process that bottom water promotes, to realize
Bottom water water logging detection.This method is simple and feasible, quickly and effectively, can instruct bottom during indoor oriented perforating oil recovery by heating
The detection of water water logging.
Hereinafter, further confirming that the present invention detects oriented perforating using temperature change by rate temperature change equation
The genuine and believable property of bottom water water logging.
Fig. 1 is the micro unit in oriented perforating of the invention.According to oil reservoir steam injection heat-transfer mechanism, it is assumed that on stratum
Instantaneous thermal balance can be established between Rock Matrix and pore-fluid, then for any one micro unit (Δ x, Δ y, the Δ in stratum
Z), as shown in Figure 1, its energy-balance equation can state are as follows:
(energy-outflow energy of injection)+internal energy generated=interior energy increase formula 1
Along x, tri- directions y, z enter the energy of micro unit and flow out the difference of the energy of micro unit are as follows:
Formula 2
Formula 3
Formula 4
2~formula of formula, 4 three formula is added to get the difference for the gross energy for arriving disengaging micro unit:
Formula 5
The increase of energy may be expressed as: in micro unitFormula 6
It is assumed that there is no heat source, then energy balance equation 1 inside micro unit are as follows:
Formula 7
Wherein: λ: formation thermal conductivity, kJ/ (msK)；ρo, ρw, ρs: the density of oil, water and steam, kg/m3；vo,
vw, vs: the volume flow rate of oil, water and steam, m/d；So, Sw, Ss: the saturation degree of oil, water and steam, decimal；Ho, Hw, Hs: oil, water
With the heat content of steam, kJ/kg；ρR: the density of formation rock, kg/m3；HR: the heat content of formation rock, kJ/kg；Φ: oil reservoir hole
Degree, decimal；T: temperature, K；T: time, s.
Bottom water encroachment is influenced by injection heat, and nearby bottom water coning is slow for injection well, and often nearby water cone is fast for producing well
Degree is very fast, has occurred and that water logging before steam-front arrival, and there is no vapor chamber condensation leading edges to do to bottom water water logging detection
It disturbs.Therefore, it can simplify the conservation of energy formula of temperature measuring point position near producing well, formula 7 can simplify are as follows:
Formula 8
The substance of known unit quality is from T0It is warming up to the heat that T is absorbed and meets following relationship with its specific heat capacity:
H=C (T-T0) formula 9
Wherein: H: the enthalpy of substance, kJ/kg；C: the specific heat capacity of substance, kJ/ (kgK)；T: the temperature of substance, K；T0: ginseng
Examine temperature, K.
MR=(1- φ) ρRCR+φ(SoρoCo+SwρwCw) formula 10
Wherein: MR: rock thermal capacity, kJ/ (m3·K)；Co、Cw: the specific heat capacity of oil, water, kJ/ (kgK).
For arbitrary point, it is believed that the thermal capacity that point when water logging has just occurred is constant, and formula 8 can be converted:
Formula 11
Arbitrary point temperature changes with time during the oriented perforating physical analogy of formula 11 quantificational expression, can also be with
The difference of temperature change before and after qualitative relatively arbitrary point water logging.By formula 11 it is found that any point temperature amount of changing with time with
The thermal capacity of reservoir rocks is inversely proportional, and identifies bottom water coning on this basis, to point position water logging situation each in model ontology
It is detected.Micro unit is saturated by crude oil before water logging, the rock thermal capacity of saturated oils are as follows:
MR=(1- φ) ρRCR+φρoCoFormula 12
Micro unit is saturated by bottom water after water logging, and the rock thermal capacity of saturated water can indicate
MR=(1- φ) ρRCR+φρwCwFormula 13
Since the specific heat capacity and density of crude oil are respectively less than the specific heat capacity and density of water flooding, the rock of micro unit after water logging
Stone (saturated water) thermal capacity is greater than micro unit rock (saturated oils) thermal capacity before water logging.In each small monitoring time
It is interior, it is believed that fluid all directions volume flow rate is basically unchanged before and after micro unit water logging, can be considered this it can be seen from formula 11
The numerator value of formula is constant.Therefore, the corresponding rock thermal capacity of denominator is bigger in the formula, and temperature ramp-up rate is slower, rock thermal capacitance
Measure smaller, temperature ramp-up rate is faster, i.e., water logging micro unit heating rate is lower than non-water logging heating rate, thus temperature-when
Between can be simple and fast in coordinate system acquisition bottom water water logging time.
Therefore, based on above-mentioned theoretical foundation, the data result obtained using the method for the present invention is genuine and believable, thick to bottom water
The exploitation of oil reservoir has directive function.
Further, the water layer test point and the oil reservoir test point are vertical corresponding.It, can be in order to improve detection accuracy
The position of water layer test point is defined, corresponding point vertical with oil reservoir test point is chosen in bottom aquifer and is tested as water layer
Point.
It is chosen with point of the oil reservoir test point on a vertical line direction in bottom aquifer as water layer test point, it can be more
It is effective that the temperature changing trend after oil-yielding stratum test point is flooded is presented, keep testing result more accurate.At this point, not only needing
Its temperature is monitored in oil reservoir test point mounting temperature sensor to change with time, it will also be under corresponding with each oil reservoir test point
It chooses water layer test point and monitors its temperature in each water layer test point mounting temperature sensor and change with time in side.
Further, the first fitting a straight line that first slope is greater than zero, root are obtained according to the first time-temperature curve
The second fitting a straight line that the second slope is greater than zero is obtained according to second time-temperature curve.The first of heat is being injected to oil reservoir
Phase, oil reservoir are handled up and unstable, the first fitting a straight line that will cause heating rate of being instantaneously heated because steam is isocaloric
Drafting with the second fitting a straight line should be that the time-temperature point after stablizing for test point heating rate is fitted,
That is the first fit slope is greater than zero, and the second slope is greater than zero.
The present invention also provides a kind of detection system of oriented perforating bottom water water logging, including reservoir model unit, institutes
It states and is provided with temperature sensor in model unit；It further include extraction unit, data acquisition and control unit, injection unit, bottom water
Analogue unit, the extraction unit, data acquisition with control unit, injection unit, bottom water analogue unit respectively with the oil reservoir
Model unit connection.
Specifically, reservoir model unit is used to simulate oil reservoir on the spot, and temperature sensor is arranged in reservoir model unit；
Extraction unit is connect with reservoir model unit, for simulating the device of the production of hydrocarbons such as drawing pump on the spot；Data acquisition and control
Unit is connect by temperature sensor with reservoir model unit, warm in real time for the temperature change and record of monitoring temperature sensor
Degree；Injection unit is connect with reservoir model unit, for simulating heat source conveying on the spot, to reservoir model unit heating to complete heat
It adopts；Bottom water analogue unit is connect with reservoir model unit, can be by the practical water of bottom water reservoir for simulating the water energy of bottom water
Physical efficiency amount size rationally and effectively reflects in three-dimensional physical simulation.
The detection system of oriented perforating bottom water water logging of the invention can provide solid for three-dimensional physical simulation
Basis facilitates the realization of oriented perforating bottom water water logging detection method of the present invention.
Further, the reservoir model unit includes oriented perforating model, rotating mechanism and mobile bracket；It is described
Temperature sensor is arranged in the oriented perforating model.Mobile bracket can hold up oriented perforating model and
Under the control of rotating mechanism, oriented perforating model can make the adjustment of respective angles, to improve oriented perforating
The similarity of model and oriented perforating on the spot.
Oriented perforating model is the simulation of oil reservoir on the spot, is passed by installing temperature in oriented perforating model
Sensor is capable of the temperature change of real-time monitoring test point, to carry out water logging detection to test point.
Further, the oriented perforating model includes reservoir model and bottom water layer model, the reservoir model packet
Oil and gravel are included, the bottom water layer model includes water and gravel.The production of reservoir model and bottom water layer model needs to utilize back-up sand
Tube model, which is measured, meets the rock grain size composition that requirement is seeped in simulation model hole, and by this composition allocation models sand, filling three-dimensional
Physical model.Meanwhile further including producing well model and gas injection well model in reservoir model, extraction unit passes through producing well model
It is connect with reservoir model unit, injection unit is connect by gas injection well model with reservoir model unit, producing well model and gas injection
The different well type of well model, completion mode and height of water avoidance can be simulated with stainless steel tube or lucite tube.
Meanwhile the injection unit includes steam generation facility and its displacement metering device, chemical agent storage tank and its drive
For metering device etc., polynary displacing medium, including hot water, steam, chemical agent are provided for experiment under level pressure or constant flow operating condition
And non-condensation gas.
The extraction unit includes production fluid metering device and back pressure device, is mainly used for control, the experimental period of back pressure
The metering of record and output flow.
The present invention also provides the detection systems of any of the above-described oriented perforating bottom water water logging to open in oil/gas well
Application in adopting.
What the detection method and system of oriented perforating bottom water water logging provided by the invention and application were heated based on oil reservoir
Basic reservoir engineering theories establish bottom water water during oil recovery by heating according to energy-balance equation for oriented perforating
The implementation method of detection is flooded, this method is on the basis of three-dimensional physical simulation temperature field data, it is only necessary to which processing is analyzed at each measuring point
Temperature changes with time relationship, that is, can recognize the process that bottom water promotes, to realize that bottom water water logging detects.This method simplicity can
Row, quickly and effectively, can instruct the detection of bottom water water logging during indoor oriented perforating oil recovery by heating.
Detailed description of the invention
Fig. 1 is the micro unit in oriented perforating of the invention；
Fig. 2 is the detection system of the oriented perforating bottom water water logging of the embodiment of the present invention；
Fig. 3 is oriented perforating model in the detection system of the oriented perforating bottom water water logging of the embodiment of the present invention
Main view；
Fig. 4 (a) is the top view of first group of oil reservoir test point in the embodiment of the present invention, and Fig. 4 (b) is in the embodiment of the present invention
The top view of second group of oil reservoir test point, Fig. 4 (c) are the top view of third group oil reservoir test point in the embodiment of the present invention, Fig. 4
It (d) is the top view of water layer test point in the embodiment of the present invention；
Fig. 5 is the temperature variation curve and fitting a straight line of a group test point in the embodiment of the present invention；
Fig. 6 is the temperature variation curve and fitting a straight line of b group test point in the embodiment of the present invention；
Fig. 7 is the temperature variation curve and fitting a straight line of c group test point in the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention, to this
Technical solution in inventive embodiments is clearly and completely described, it is clear that described embodiment is that a part of the invention is real
Example is applied, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not making creation
Property labour under the premise of every other embodiment obtained, shall fall within the protection scope of the present invention.
Embodiment
Fig. 2 is the detection system of the oriented perforating bottom water water logging of the embodiment of the present invention.As shown in Fig. 2, the system packet
Include reservoir model unit, extraction unit, data acquisition and control unit, injection unit, bottom water analogue unit.
Wherein, extraction unit includes booster (back pressure device) and metering device；Injection unit include steam generator and
Its displacement pump, chemical agent storage tank and its displacement pump, non-condensate gas.
By analyze to certain oriented perforating and be simulated using three-dimensional physical model to the oil reservoir, Fig. 3 is
The main view of oriented perforating model in the detection system of the oriented perforating bottom water water logging of the embodiment of the present invention.Such as Fig. 3
Shown, the cross section of the oriented perforating model is square, side length 41cm, internal depth 40cm, depth of cover 14cm,
Core intersection 16cm, model ontology bottom aquifer thickness 10cm, and two mouthfuls are arranged at the wall surface 2cm of distance model inner cavity in oil reservoir
Horizontal well, that positioned at oil reservoir top is horizontal production well A, and that oil reservoir lower part is then horizontal injection well B, and well A is most upper away from oil reservoir
Square 5cm, well B are away from oil reservoir the top 10cm.Based on the model, carry out steam flooding three-dimensional physical simulation research.
Test point selection:
To guarantee sufficiently to detect the water logging situation of the oil reservoir, formation and the hair of bottom water coning are observed comprehensively
It educates, the influence convenient for research bottom water to development effectiveness, oil reservoir test of the present embodiment in the reservoir model unit of above system
Point selection is as follows: the present embodiment has chosen three groups of oil reservoir test points, and every group 15.First group of oil reservoir test point is distributed in distance oil
In the plane of layer the top 0.5cm；Second group of oil reservoir test point is distributed in the plane of producing well A, i.e., apart from oil reservoir the top
5cm；Third group oil reservoir test point is distributed in the plane of steam injection well B, i.e., apart from oil reservoir the top 10cm.With 15 in first group
On the basis of oil reservoir test point, each oil reservoir test point of second and third group is with the corresponding oil reservoir test point in first group vertical
It is corresponding on direction.Water layer test point selection of the present embodiment in the reservoir model unit of above system is as follows: the present embodiment choosing
15 water layer test points are taken.On the basis of 15 oil reservoir test points in first group, in 15 water layer test points and first group
15 oil reservoir test points correspond in vertical direction.Fig. 4 (a) is the vertical view of first group of oil reservoir test point in the embodiment of the present invention
Figure, Fig. 4 (b) are the top view of second group of oil reservoir test point in the embodiment of the present invention, and Fig. 4 (c) is third in the embodiment of the present invention
The top view of group oil reservoir test point, Fig. 4 (d) are the top view of water layer test point in the embodiment of the present invention.It is envisioned that
In actual model, Fig. 4 (a)~Fig. 4 (d) is successively from top to bottom to be formed by stacking.After selecting above-mentioned 45 test points, respectively
It to each test point mounting temperature sensor and is numbered, specific number please refers to Fig. 4 (a)~Fig. 4 (d).
Data acquisition:
After completing above-mentioned work to the oriented perforating bottom water water logging detection system, steam generator and its drive are opened
For pump by well B to reservoir model unit heating, and apply back pressure with booster, the oil in oil reservoir can be flowed out from well A.?
In whole process, data acquisition and control unit are monitored record to the real time temperature of 45 test points, monitor 18h altogether, often
10s acquires a data.
Data processing:
It chooses three groups of data and carries out analyzing examples, with reference to the group of Fig. 4 (a)~Fig. 4 (d): a (35,26,17,8)；B group (34,
25,16,7)；C group (36,27,18,9).By Fig. 4 (a)~Fig. 4 (d) it is found that 4 points in every group, vertical corresponding from top to bottom,
Wherein, the point 8 in a group is the reference point of other 3 oil reservoir test points as water layer test point, and the point 7 in b group is surveyed as water layer
Pilot is the reference point of other 3 oil reservoir test points, and the point 9 in c group is other 3 oil reservoir test points as water layer test point
Reference point.
A group: Fig. 5 is the temperature variation curve and fitting a straight line of a group test point in the embodiment of the present invention.Referring to FIG. 5, logical
The record for crossing the real time temperature to a group draws out first time-temperature curve to the water layer test point 8 in a group, and to this
One time-temperature curve is fitted, and obtains the first fitting a straight line a1；When drawing out second to the oil reservoir test point 17 in a group
M- temperature curve, and second time-temperature curve is fitted, obtain the second fitting a straight line a2；To the oil reservoir in a group
Test point 26 draws out the second time-temperature curve, and is fitted to second time-temperature curve, obtains the second fitting
Straight line a3, since test point 26 had occurred due to steam soak for second time-temperature curve early period at the initial stage for being passed through steam
Larger situation is fluctuated, so two fitting a straight line a3 are fitted in the middle part of the second time-temperature curve as far as possible；Due to a
The top in well A, B is not present oil reservoir test point 35 in group herein there is no water logging phenomenon always in the whole process
The water logging time.
First fitting a straight line a1 is translated to the second time-temperature curve fitting until with oil reservoir test point 17, obtains oil
The third fitting a straight line a4 of layer test point 17, the intersection point P1 of the second fitting a straight line a2 and third fitting a straight line a4 is oil reservoir at this time
The water logging point of test point 17, the water logging point corresponding time are the estimated water logging time of point 17.
First fitting a straight line a1 is translated to the second time-temperature curve fitting until with oil reservoir test point 26, obtains oil
The third fitting a straight line a5 of layer test point 26, the intersection point P2 of the second fitting a straight line a3 and third fitting a straight line a5 is oil reservoir at this time
The water logging point of test point 26, the water logging point corresponding time are the estimated water logging time of oil reservoir test point 26.
B group: Fig. 6 is the temperature variation curve and fitting a straight line of b group test point in the embodiment of the present invention.Referring to FIG. 6, logical
The record for crossing the real time temperature to b group draws out first time-temperature curve to the water layer test point 7 in b group, and to this
One time-temperature curve is fitted, and obtains the first fitting a straight line a1；When drawing out second to the oil reservoir test point 16 in b group
M- temperature curve, and second time-temperature curve is fitted, obtain the second fitting a straight line a2；To the oil reservoir in b group
Test point 25 draws out the second time-temperature curve, and is fitted to second time-temperature curve, obtains the second fitting
Straight line a3；Since the oil reservoir test point 34 in b group is in the top of well A, B always in the whole process, there is no water herein
Phenomenon is flooded, the water logging time is not present.
First fitting a straight line a1 is translated to the second time-temperature curve fitting until with oil reservoir test point 16, obtains oil
The third fitting a straight line a4 of layer test point 16, the intersection point P1 of the second fitting a straight line a2 and third fitting a straight line a4 is oil reservoir at this time
The water logging point of test point 16, the water logging point corresponding time are the estimated water logging time of oil reservoir test point 16.
First fitting a straight line a1 is translated to the second time-temperature curve fitting until with point 25, obtains oil reservoir test point
25 third fitting a straight line a5, the intersection point P2 of the second fitting a straight line a3 and third fitting a straight line a5 is oil reservoir test point 25 at this time
Water logging point, which is the estimated water logging time of oil reservoir test point 25.
C group: Fig. 7 is the temperature variation curve and fitting a straight line of c group test point in the embodiment of the present invention.Referring to FIG. 7, logical
The record for crossing the real time temperature to c group draws out first time-temperature curve to the water layer test point 9 in c group, and to this
One time-temperature curve is fitted, and obtains the first fitting a straight line a1；When drawing out second to the oil reservoir test point 18 in c group
M- temperature curve, and second time-temperature curve is fitted, obtain the second fitting a straight line a2；To the oil reservoir in c group
Test point 27 draws out the second time-temperature curve, and is fitted to second time-temperature curve, obtains the second fitting
Straight line a3；Since the oil reservoir test point 36 in c group is in the top of well A, B always in the whole process, there is no water herein
Phenomenon is flooded, the water logging time is not present.
First fitting a straight line a1 is translated to the second time-temperature curve fitting until with oil reservoir test point 18, obtains oil
The third fitting a straight line a4 of layer test point 18, the intersection point P1 of the second fitting a straight line a2 and third fitting a straight line a4 is oil reservoir at this time
The water logging point of test point 18, the water logging point corresponding time are the estimated water logging time of oil reservoir test point 18.
First fitting a straight line a1 is translated to the second time-temperature curve fitting until with oil reservoir test point 27, obtains oil
The third fitting a straight line a5 of layer test point 27, the intersection point P2 of the second fitting a straight line a3 and third fitting a straight line a5 is oil reservoir at this time
The water logging point of test point 27, the water logging point corresponding time are the estimated water logging time of oil reservoir test point 27.
The testing result of the specific water logging time of above-mentioned each oil reservoir test point is as shown in table 1.
The water logging time of oil reservoir test point in 1 the present embodiment oriented perforating model of table
As shown in Table 1: in horizontal production well A in end section, it is accumulative when producing 8 23 divide after, in horizontal production well A well
Above-mentioned 6 oil reservoirs test point whole water logging, and compared with the oil reservoir test point of even depth (such as point 26 with 25), away from production
The shaft bottom well A is closer, and bottom water coning is more early to the time, and bottom water is integrally conical propulsion.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (3)
1. a kind of detection method of oriented perforating bottom water water logging, which is characterized in that include the steps that following sequence carries out:
1) after being passed through heat into oriented perforating three-dimensional physical model, the real time temperature and water layer for acquiring oil reservoir test point are surveyed
The real time temperature of pilot, wherein the oriented perforating three-dimensional physical model includes bottom aquifer and oil reservoir, the oil reservoir test
Point is in the oil reservoir, and the water layer test point is in the bottom aquifer；
2) first time-temperature curve is obtained according to the real time temperature of the water layer test point, according to the first time-temperature
Curve obtains the first fitting a straight line, and the slope of first fitting a straight line is first slope；
3) the second time-temperature curve is obtained according to the real time temperature of the oil reservoir test point, according to second time-temperature
Curve obtains the second fitting a straight line, and the slope of second fitting a straight line is the second slope；
The third fitting a straight line of second time-temperature curve is obtained according to the first slope；
4) time corresponding to the intersection point of second fitting a straight line and third fitting a straight line is obtained.
2. the method according to claim 1, wherein the water layer test point and the oil reservoir test point are vertical right
It answers.
3. the method according to claim 1, wherein obtaining first tiltedly according to the first time-temperature curve
Rate is greater than zero the first fitting a straight line, obtains second fitting of second slope greater than zero according to second time-temperature curve
Straight line.
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| CN103452541A (en) * | 2013-09-18 | 2013-12-18 | 张方礼 | Edge-bottom water heavy oil reservoir steam-drive two-dimensional proportion physical simulation device and application method thereof |
| CN103485753A (en) * | 2013-09-18 | 2014-01-01 | 张方礼 | Bottom water heavy oil reservoir steam flooding two-dimensional proportion physical simulation device and using method thereof |
| CN103867174A (en) * | 2014-02-26 | 2014-06-18 | 中国石油天然气股份有限公司 | Method and system for analyzing steam suction condition of thick oil horizontal well |
| CN105156102A (en) * | 2015-09-28 | 2015-12-16 | 中国石油大学(北京) | Water body energy three-dimensional physical simulation device and method of bottom water reservoir |
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| CN103452541A (en) * | 2013-09-18 | 2013-12-18 | 张方礼 | Edge-bottom water heavy oil reservoir steam-drive two-dimensional proportion physical simulation device and application method thereof |
| CN103485753A (en) * | 2013-09-18 | 2014-01-01 | 张方礼 | Bottom water heavy oil reservoir steam flooding two-dimensional proportion physical simulation device and using method thereof |
| CN103867174A (en) * | 2014-02-26 | 2014-06-18 | 中国石油天然气股份有限公司 | Method and system for analyzing steam suction condition of thick oil horizontal well |
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