CN1305105A - Heat transfer method for logging well - Google Patents

Abstract

A heat transfer method for logging well includes such steps as determining the target bearing stratum in well according to oil-gas record and electric logging result, applying heat to it with artificial heat source, measuring temp variations of the stratum at different time periods, measuring the porosity of said stratum, creating heat transfer equation, and calculating the oil-gas content of target stratum. Its advantages include high correctness, simple process and low cost.

Description

Heat transfer method for logging well

The present invention relates to the heat transfer method for logging well of oil-gas exploration and exploitation well hydrocarbon zone interpretation and oil and gas production prediction.

For many years, hydrocarbon zone is explained in widespread use electric logging, acoustic logging etc. in the petroleum industry, and this has brought into play crucial effects in petroleum industry.Disengage many hydrocarbon zone according to hydrocarbon zone tool high resistance, the characteristic solution of the praetersonic time difference, explored and Development Practice confirm.But along with deepening continuously of oil-gas exploration, exploration targets becomes increasingly complex, and original technical interpretation hydrocarbon zone has inadaptability.The ancient dragon depression in the distant basin of pine because the oil reservoir reservoir properties is poor, mostly is the low porosity and low permeability reservoir, and shale, calcareous content are higher, and the electrical standard of oil reservoir is difficult determines that prospect pit oil gas natural production is very low, need just can obtain commercial hydrocarbon flow to the reservoir fracturing transformation.Basin, Hailaer Wu Erxun depression, because oil reservoir is a complicated reservoirs, the electrical property feature of oil reservoir, acoustic characteristic more are difficult to determine.As S3, the S4 Jing Nan village group reservoir that has only 2km apart, S3 well rt resistivity 9-16 Ω m, S4 well rt resistivity 15-24 Ω m, well logging, comprehensive log interpretation two wells are the difference oil reservoirs, but formation testing S3 well day produce oil is 2.48 tons behind the reservoir fracturing, and the S4 well is but produced 4.6 tons in water daily.Pressure break formation testing at present obtains industry oil stream success ratio about 60%, illustrates that the hydrocarbon zone interpretation difficulty is bigger, explains that accurately hydrocarbon zone needs new technology.

The purpose of this invention is to provide a kind of method that produces with heat transfer well logging interpretation hydrocarbon zone and predicting oil in the oil-gas exploration and development, make hydrocarbon zone interpretation more accurate, improve the success ratio that the pressure break formation testing obtains commercial hydrocarbon flow, thereby improve the economic benefit of oil-gas exploration and development.Beat the millions of units of a bite well expense in the oil-gas exploration and development, therefore more than 20 ten thousand yuan of fracturing reform one deck reservoir expenses use this method to improve its success ratio, and important economic implications is arranged.

For achieving the above object, the present invention takes following technical scheme: this heat transfer method for logging well comprises the steps:

(1) determines target reservoir in the well according to well logging show of oil and gas and electric logging integrated interpretation result;

(2) storage belongs to layer heating to target with artificial heat in well;

(3) distinguish target reservoir variation of temperature in the measuring well in the different time periods then;

(4) factor of porosity of measurement target reservoir;

(5) according to the geology statistical data, set up heat transfer equation, and, calculate the oil-containing tolerance of target reservoir according to the temperature anomaly value of the measured target reservoir of step (3).

Oil and natural gas is compared the lower thermal conductivity of tool with water with compacted rock.For example, under the condition of an atmospheric pressure and 20 ℃, the big paper of the thermal conductivity of oil, rock gas, water and rock is respectively 0.15w/m ℃, 0.063w/m ℃, 0.602w/m ℃ and 2.0-3.0w/m ℃.When having fluid in the porous medium, the thermal conductivity of certain medium depends on the relative content of fluid.For example, under the condition of an atmospheric pressure and 32 ℃, factor of porosity is that the thermal conductivity of 19% saturated air sandstone, saturated oil sandstone, saturation water sandstone is respectively 0.9w/m ℃, 1.35w/m ℃, 2.75w/m ℃.

Have so big thermal conductivity difference between oil, gas-bearing formation and water layer and the dried layer, to its heating, its temperature variation is clocklike, utilizes this rule to calculate the oil-containing tolerance of target reservoir, starting point of the present invention that Here it is.

In the present invention, be meant in the uncased hole in the described well.

In the present invention, be meant in the cased well in the described well.

In the present invention, described artificial heat is an electric heat source, and the electric heater that promptly adopts 2000W in the heating target reservoir process, makes 5-10 ℃ of well temperature rise as electric heat source in well.

In the present invention, described artificial heat is the explosive thermal source, promptly adopts the perforating bullet in the formation testing, heats in well in the target reservoir process with perforating bullet, and every meter bullet number is 16-18.

In the present invention, can equal the heat added value in the stratum according to the thermal loss value in the well of the heat conduction problem of cylinder, set up heat transfer equation, its heat transfer equation is:

Can set up heat transfer model, find the solution heat-conduction equation with method of difference, its unstable state sphere heat-conduction equation is:

ρ is a density in the formula, and C is a specific heat, and K is a thermal conductivity, u be temperature field function u (r, t), t is the time, r is a radius of sphericity, q is a thermal source.

Its unstable state cylinder heat-conduction equation is: R is the cylinder radius in the formula, and y is a height of column, $a=\frac{K}{\mathrm{\ρ}\·C}$ , ρ is a density, and C is a specific heat, and K is a thermal conductivity, and u is the temperature field function, (t), t is the time to u for r, y.

In the present invention, for convenient, the simple and direct oil-containing tolerance that dopes target reservoir in oil-gas exploration and exploitation well hydrocarbon zone, heat transfer method for logging well of the present invention is in the oil-containing tolerance step of calculating target reservoir, and described heat transfer equation is reduced to following curvilinear equation:

Q=2.31×ΔT-0.62

Wherein, the temperature anomaly value when Q is 1 hour of target reservoir for ton/sky Δ T, ℃.And factor of porosity φ changes not quite in the ordinary course of things.

In the present invention, this method also comprises the steps:

(6) according to factor of porosity, the temperature anomaly value of the target reservoir of institute's side, adopt formula S ₀=0.257 * Δ T-6 * φ+0.826, φ is a factor of porosity, tries to achieve this target reservoir oil-containing degree of saturation S ₀Value.

The invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a heat transfer well logger synoptic diagram

Fig. 2 is that the reservoir heat transfer temperature changes synoptic diagram in the well

Fig. 3 is the oil reservoir and the water layer-temperature time curve comparison diagram of point source sphere heat conduction model

Fig. 4 is the oil reservoir and the water layer temperature-time curve comparison diagram of post source heat conduction model

Fig. 5 is No. 28 well heat transfer logs

Fig. 6 is stratum heat transfer temperature exceptional value and oil yield graph of a relation

Fig. 7 is stratum heat transfer temperature exceptional value and prediction oil saturation figure

In to reservoir heating process, the temperature of finding the well temperature and the water layer at oil, gas-bearing formation place or doing layer place is compared increase fast, and after heating process, the well temperature at oil, gas-bearing formation place and water layer or the temperature of doing layer place are compared the slow of reduction.The time dependent curve of reservoir heat transfer temperature as shown in Figure 2 in the well.

Set up heat transfer model, adopt method of difference to find the solution heat-conduction equation, just drilling analysis, its analysis result also is to be consistent with above-mentioned rule.

Set up heat point source sphere heat conduction model, suppose in the medium of infinitely great homogeneous isotropism, put a heat point source,, can set up unstable state spheroid heat-conduction equation according to heat transfer theory as the heat transfer well logger:

ρ is a density in the formula, and C is a specific heat, and K is a thermal conductivity, u be temperature field function u (r, t), t is the time, r is a radius of sphericity, q is a thermal source.

The application method of difference is separated this equation and is got: $u_{i.j}=a\&times;\frac{\mathrm{\&Delta;t}}{\mathrm{\&Delta;}{r}^2}(1+2/i)u_i+1.j-1+(1-2\&times;a\&times;\frac{\mathrm{\&Delta;t}}{\mathrm{\&Delta;}{r}^2})$ $-2\&times;a\&times;\frac{\mathrm{\&Delta;t}}{\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A0012099700151.png,A0012099700181.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}/i\&times;u_{i,j-1}+a\&times;\frac{\mathrm{\&Delta;t}}{\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A0012099700151.png,A0012099700181.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}\&times;u_{i-1,j-1}$ i=2,3……N,j=0,1,2……N $u_{1.j}=t_0-\underset{i=2}{\overset{N}{\mathrm{\&Sigma;}}}{i}^2\&times;u_{i.j}+t_0$ u _{I, 0}In=0 formula $a=\frac{K}{\mathrm{\&rho;}\&CenterDot;C}$ , Δ t-is the time sampling interval, Δ r is the radius sampling interval.

ρ _Oil=0.85, λ _Oil=0.13, C _Oil=0.5

ρ _Water=1, λ _Water=0.58, C _Water=1

ρ _Sand=2.62 λ _Sand=4, C _Sand=0.19

ρ _Oil-sand=φ ρ _Oil+ (1-φ) ρ _Sand

c _Oil-sand=φ C _Oil+ (1-φ) C _Sand

λ _Oil-sand=1/2 (1/ (φ/λ _Oil+ (1-φ)/λ _Sand) ten λ _Oil(2 * φ *

λ _Oil+ (3-2 * φ) * λ _Sand)/(3-φ) * λ _Oil+ φ * λ _s

The parameter of water sand can draw equally.And make q=10, Δ t=60 reaches according to difference equation

Stating parameter (will unify dimension) calculates.

Set up unstable state spheroid heat-conduction equation according to heat transfer theory, and according to difference equation and known parameter, calculate the oil-sand of φ=16%, and the temperature at the heat point source place of the water sand of φ=10% curve over time, as shown in Figure 3, curve (1) is φ=16% pay sand-temperature time curve, curve (2) is the temperature-time curve of φ=10% water layer of sand, as seen from Figure 3, when heating 2 hours, the high porosity oil-sand is much higher than low-porosity water sand temperature, and in the heating process, it is very fast that the oil-sand temperature increases.Stopped heating in 2 hours, oil-sand temperature reduction afterwards is slow as can be seen.

Also can set up instantaneous post thermal source cylinder heat conduction model, suppose in the medium of even each same sex of infinity, apply an instantaneous post thermal source,, can set up unstable state cylinder heat-conduction equation according to heat transfer theory as applying heat with perforating bullet:

R is the cylinder radius in the formula, and y is a height of column, $a=\frac{K}{\mathrm{\&rho;}\&CenterDot;C}$ , ρ is a density, and C is a specific heat, and K is a thermal conductivity, and u is the temperature field function, (t), t is the time to u for r, y.The application method of difference is separated this equation and is got: u _{I, j, k}=w ₁u _{I, j+1, k-1}+ (1-2 * w ₁-2 * w ₂-1/i * w ₂) * u _{I, j, k-1}* w ₁* u _{I, j-1, k-1}+ w ₂* (1+1/i) * u _{I+1, j, k-1}+ w ₂u _{I-1, j, k-1}J, i=2,3 ... N, K=0,1,2 ... N, u _{I, j, k}u _{I, l, k}And u _{L, l, k}Available tendency method is tried to achieve.In the formula $W_{}$ ${}_1=\frac{K}{\mathrm{\&rho;c}}\&times;\frac{\mathrm{\&Delta;t}}{\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="2"\; label="y"\; filenames="A0012099700151.png,A0012099700181.png"\; state="\{\{state\}\}">y</figure-callout>}}^2},{\mathrm{<figure-callout\; id="2"\; label="W"\; filenames="A0012099700151.png,A0012099700181.png"\; state="\{\{state\}\}">W</figure-callout>}}_2=\frac{K}{\mathrm{\&rho;c}}\&times;\frac{\mathrm{\&Delta;t}}{\mathrm{\&Delta;}{\mathrm{<figure-callout\; id="2"\; label="r"\; filenames="A0012099700151.png,A0012099700181.png"\; state="\{\{state\}\}">r</figure-callout>}}^2}$

It is the same to try to achieve above-mentioned parameter with the heat point source method.

Can set up unstable state cylinder heat-conduction equation according to heat transfer theory, and according to difference equation and known parameter, the water sand cylinder central spot temperature that calculates the oil-sand of 16% factor of porosity and 10% factor of porosity is change curve in time, as shown in Figure 4, curve (1) is the temperature-time curve of φ=16% pay sand, curve (2) is the temperature-time curve of φ=10% water layer of sand, as seen from Figure 4, heating back about 1 hour temperature variation tends towards stability, the high porosity oil-sand wants big than low-porosity water sand temperature is obvious, about 2.5 times.

According to just drilling analysis as can be known, influencing the time dependent principal element of heat transfer temperature is fluid properties and factor of porosity.Under the known situation of fluid properties and factor of porosity, can just perform temperature curve over time, when learning heating reservoir temperature than water layer, do the fast of layer increase in temperature, heating back reservoir temperature than water layer, do slow that layer temperature reduces.Conversely, under the situation that records heat transfer temperature and formation porosity, can be finally inversed by fluid properties of reservoir, i.e. reservoir oil-containing tolerance.The present invention utilizes this rule to propose to utilize the method for conducting heat and logging well just.

The method according to this invention, the heat transfer temperature that can record target reservoir changes and its factor of porosity, can be finally inversed by the fluid properties of target reservoir like this according to heat transfer equation, i.e. reservoir oil-containing tolerance.

In fact, to the well logging of conducting heat of 34 mouthfuls of wells, and the factor of porosity of the target reservoir of every mouthful of well of real side, also survey the oil offtake of every mouthful of well, its test the results are shown in Table 1, and the relation of stratum heat transfer temperature exceptional value and oil yield is made Fig. 6.Among Fig. 6, zero expression industry oil stream well, △ represents low yield or micro oil stream well.Result shown in table 1 and Fig. 6 also shows greatly then oily this rule of height of producing of temperature anomaly in the well.Industry oil stream well has 20 mouthfuls among Fig. 6, according to the distribution of each coordinate points of each well of correspondence among Fig. 6, can obtain the curve of a stratum heat transfer temperature exceptional value and oil yield.With the data in the table 1, the stratum heat transfer temperature exceptional value among consideration Fig. 6 and the curve of oil yield draw: Q=2.31 * Δ T-0.62, Q-ton/sky (t/d) wherein, the temperature anomaly value of Δ T-reservoir in the time of 1 hour ℃, utilize this curvilinear equation, just utilize greatly then high this rule of oil yield of temperature anomaly, predict fuel-displaced day output easily.

Set up heat transfer model, adopt method of difference to find the solution heat-conduction equation, just drilling analysis, can also obtain the reservoir of identical factor of porosity, heat transfer temperature is big unusually, then reservoir oil saturation height; The reservoir that identical heat transfer temperature is unusual, factor of porosity greatly then oil saturation are low, and the relational expression that therefore can draw oil saturation and temperature anomaly value and factor of porosity is S ₀=A * Δ T-B * φ+C.Wherein, the temperature anomaly value of Δ T-reservoir in the time of 1 hour ℃, φ is a factor of porosity.According to just drilling analysis, the B value averages 6, then S between 4-8 ₀=A * Δ T-6 * φ+C.

According to No. 4 wells in the his-and-hers watches 1, the real side of No. 15 wells.The saturation degree of No. 4 wells is 62%, the heat transfer temperature exceptional value is 2 ℃; The saturation degree of No. 15 wells is 50%, the thermal conductivity exceptional value is 1.3 ℃, and two groups of data respectively in the above-mentioned formulas of substitution, are tried to achieve:

A0.257????C0.826

So, S ₀=0.257 * Δ T-6 * φ+0.826

Adopt heat transfer method for logging well of the present invention, can real side heat transfer temperature exceptional value Δ T, porosity value φ can calculate the oil saturation of target reservoir according to this formula.

Table 1 heat transfer well temperature abnormality value and output statistics table

Sequence number	Pound sign	Layer position	Well section (m)	Heat transfer temperature (C)	Oil offtake (t/d)	Factor of porosity (%)
							????1	Gold 23	?G42-48	??2029-2083	????2.7	????5.8	????18
????2	Too 21	?Y27,29	??1643-1678	????2.8	????5.4	????13
							????3	Apricot 71	?F76,84	??1525-1634	????1.6	????5.5	????15
????4	Breathe out 21	?F42,43,44	??2307-2340	????2	????4.01	????12
							????5	Soviet Union 11	?N45,46	??1793-1805	????2	????4.8	????15
????6	Ancient 81	?P49,50	??1885-1906	????2.3	????3.83	????14
							????7	Gold 81	?F94	??2079-2082	????2	????3.6	????13
????8	English 14	?G84-87	??2231-2245	????1.6	????3.24	????9
							????9	Ancient 571	?p55,62	??1933-1985	????1.1	????2.37	????14
????10	Portugal 314	?FY30,33	??1682-1763	????1.4	????2.08	????9
							????11	Source 24	?Y104,105	??1685-1691	????0.9	????2.02	????15
????12	Two 23	?F1,3,4	??778-807	????0.9	????1.9	????14
							????13	Ancient 54	?P39,40	??1947-1957	????0.7	????1.04	????11
????14	Portugal 482	?F59,60	??1617-1621	????1.3	????1.16	????13
							????15	Ancient 933	?F86,90,	??2024-2221	????1.3	????2.3	????11
????16	Ancient 124	?P26,27	??1973-1976	????2.3	????0.52	????13
							????17	Defend 211	?F20,21	??1835-1855	????2.1	????0.12	????17
????18	Tree 17	?Y01	??1883-1942	????1.1	????0.07	????16
							????19	Ancient 431	?Y10	??2045-2050	????0.8	????0.5	????14
????20	English 44	?G88,92	??2195-2213	????0.6	????0.5	????16
							????21	Ancient 533	?P84,85	??1866-1876	????0.7	????0.9	????15
????22	Portugal 313	?F12,13	??1623-1637	????0.1	????0.2	????12
							????23	Ancient 92	?F95	??1973-1976	????0.4	????0.7	????14
????24	Ancient 432	?F52,53	??2131-2147	????0.1	????0.13	????18
							????25	Tree 26	?F3,4	??1681-1709	????0	????0.03	????16
????26	Defend 21	?F44	??1856-1858	????0.1	????0.018	????10
							????27	Tower 23	?G13	??1705-1708	????0.2	????0.34	????13
????28	Defend 23	?F14	??1800-1803	????1.8	????2.5	????14
							????29	Ancient 302	?G63-65	??2083-2096	????2.4	????3.5	????13
????30	Virtue 26	?F4,5	??1812-1822	????1.9	????3.2	????16
							????31	Tree 28	?F3,4	??1662-1746	????1.2	????1.08	????15
????32	Big by 428	?P11-18	??1662-1692	????1.8	????3.9	????10
							????33	Source 101	?F6,7	??1468-1481	????0.5	????0	????14
????34	Still 11	?F8,9	??1508-1518	????1.3	????2.73	????15

The well porosity value of real side in the table 1 and the relation of heat transfer temperature exceptional value are made Fig. 7, zero expression industry oil stream well among Fig. 7, △ represents low yield or micro oil stream well, can mark the oblique line of identical oil saturation from slope 4-8 according to the data of just drilling, three three oblique lines that are respectively 35%, 55%, 75% oil saturation are arranged among Fig. 7.Therefore, under the situation of actual measurement well porosity value and heat transfer temperature exceptional value, can predict the saturation degree of oil-containing according to Fig. 7.

Among the present invention, in well, the stratum is applied heat, following two kinds of methods can be arranged with artificial heat.

A kind of method is to make thermal source with explosive target reservoir is heated in well, measures this reservoir and temperature in the well at stratum place up and down thereof with temperature bomb respectively in the different time periods then.

Perforating bullet in the formation testing can be used as the explosive thermal source, and the perforation in the formation testing process is exactly to ground layer for heating.1 hour, 2 hours equal times are used respectively in the temperature bomb measuring well behind perforation, and temperature can obtain the well-log information that conducts heat.Perforating bullet in the type of the perforating bullet that the present invention uses and the operation of perforating bullet and the present formation testing is on all four.

Other method is that thermal insulation board etc. produce the heat transfer well logger as shown in Figure 1 with thermometer, electric heat source, to the target reservoir heating, measures in the heating process and temperature is over time in the well after the heating process in well.

Its thermometer 62 is identical with thermometer in the temperature bomb, and the electric heater 61 about 2000W can be used as electric heat source.The well temperature rise both can for 5-10 ℃.The two ends of this heat transfer well logger are equiped with thermal insulation board 63, and this heat transfer well logger is by wire connecting power, measurement car 64, and this instrument is to adopt present existing temperature logging tool to add that electric heat source constitutes.During use, this instrument is seated on the position of the target reservoir in the well, and the diameter of this instrument and the aperture of well are equal substantially, and upper and lower operation is not obstructed in order to measure, and the diameter of this instrument is slightly smaller than the aperture of well.

Embodiment

(1) determines target reservoir in the well

Earlier according to well logging show of oil and gas situation and the determined oil reservoir of result of log interpretation, difference oil reservoir, suspicious oil reservoir, determine target reservoir in the well, general selected survey perforation be target reservoir, thickness is 4-8m, with No. 28 wells is example, shown in Fig. 6, table 1, determines the well section at 1800-1803m in these No. 28 wells, floor position is F14 number target reservoir, and bed thickness is 3.0m.

(2) adopt perforating bullet that target reservoir is applied heat

Adopt the YD-102 bullet then, with the density in every meter 16 hole, clear water, total head well perforation.

(3) dynamic change of temperature in the measuring well

Duplicate measurements well temperature in 1 hour, 2 hours constant durations behind perforation.Measure temperature in this target reservoir and the well up and down thereof after 1 hour after just adopting perforation in the present embodiment, in No. 28 wells with 9503 type temperature bombs, velocity survey perforation interval with per minute 60m is the well temperature on target reservoir and stratum up and down thereof, and the curve map of the temperature relation of each well Duan Yuqi correspondence is seen Figure 10.

Not considering under the well temperature situation that perforation heating causes the temperature of going into the well on the target reservoir directly to be linked to be oblique line, see the dotted line among Fig. 5, this dotted line the temperature at corresponding target reservoir place be normal well temperature T ₀The actual well temperature of surveying the target reservoir place is T, and the maximum well temperature abnormality value of then conducting heat is Δ T=T-T ₀, the Δ T of No. 28 wells is 1.8 ℃.

(4) factor of porosity of actual measurement target reservoir

It is 14% that the factor of porosity of this target reservoir is surveyed.

(5) the applied geology statistical method is calculated reservoir oil saturation and prediction oil yield

According to formula S ₀=0.257 * Δ T-6 * φ+0.826

Wherein, Δ T is 1.8 ℃, and φ is 14%.Try to achieve

This target reservoir oil saturation S ₀Be 44%,

According to formula Q=2.31 * Δ T-0.62

Wherein, Δ T is 1.8 ℃, and the day output Q that tries to achieve the oil of this target reservoir is 3.53 tons/day.In actual production, actual measurement have a daily output of 2.5 tons/day, with the prediction day output gap is arranged.But as those skilled in the art are acceptables, can think that on the other hand the oily day output of this well has the potentiality of further raising.

Heat transfer method for logging well of the present invention is based upon on electric logging, the sound logging basis, its advantage is that radius of investigation is large, can reach hundreds of cm, electric logging, sound logging radius of investigation be generally at tens cm, heat transfer method for logging well predicting oil/gas output and accurate to hydrocarbon zone interpretation. Use the method predicting oil/gas output and explain oil-gas Layer, can reduce the cased hole number, can reduce the quantities of formation testing and pressure break formation testing, greatly increase economic efficiency, use the method and can find new oil-gas Layer, realize the oil-gas exploration new breakthrough.

Claims (9)

1, a kind of heat transfer method for logging well is characterized in that: this method comprises the steps:

(1) determines target reservoir in the well according to well logging show of oil and gas and electric logging integrated interpretation result;

(2) in well, target reservoir is applied heat with artificial heat;

(3) distinguish target reservoir variation of temperature in the measuring well in the different time periods then;

(4) factor of porosity of measurement target reservoir;

(5) according to the geology statistical data, set up heat transfer equation, and, calculate the oil-containing tolerance of target reservoir according to the temperature anomaly value of the measured target reservoir of step (3).

2, heat transfer method for logging well according to claim 1 is characterized in that: be meant in the uncased hole in the described well.

3, heat transfer method for logging well according to claim 1 is characterized in that: be meant in the cased well in the described well.

4, according to claim 2 or 3 described heat transfer method for logging well, it is characterized in that: described artificial heat is an electric heat source, and the electric heater that promptly adopts 2000W in the heating target reservoir process, makes 5-10 ℃ of well temperature rise as electric heat source in well.

5, according to claim 2 or 3 described heat transfer method for logging well, it is characterized in that: described artificial heat is the explosive thermal source, promptly adopts the perforating bullet in the formation testing, heats in well in the target reservoir process with perforating bullet, and every meter bullet number is 16-18.

6, heat transfer method for logging well according to claim 1 is characterized in that: in the oil-containing tolerance step of calculating target reservoir, described heat transfer equation is:

ρ is a density in the formula, and C is a specific heat, and K is a thermal conductivity, u be temperature field function u (r, t), t is the time, r is a radius of sphericity, q is a thermal source.

7, heat transfer method for logging well according to claim 1 is characterized in that: in the oil-containing tolerance step of calculating target reservoir, described heat transfer equation is:

R is the cylinder radius in the formula, and y is a height of column, $a=\frac{K}{\mathrm{\&rho;}\&CenterDot;C}$ , ρ is a density, and C is a specific heat, and K is a thermal conductivity, and u is the temperature field function, (t), t is the time to u for r, y.

8, heat transfer method for logging well according to claim 1 is characterized in that: in the oil-containing tolerance step of calculating target reservoir, described heat transfer equation is reduced to following curvilinear equation:

Q=2.31×ΔT-0.62

Wherein, Q is ton/sky, the temperature anomaly value when Δ T is 1 hour of target reservoir, ℃.

9, heat transfer method for logging well according to claim 7 is characterized in that: this method also comprises the steps:

(6) according to factor of porosity, the temperature anomaly value of the target reservoir of institute's side, adopt formula S ₀=0.257 * Δ T-6 * φ+0.826, φ is a factor of porosity, tries to achieve this target reservoir oil-containing degree of saturation S ₀Value.

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