CN107725044A - The method of Sandstone Gas Bearing reservoir producing water ratio prediction based on array induction, laterolog - Google Patents
The method of Sandstone Gas Bearing reservoir producing water ratio prediction based on array induction, laterolog Download PDFInfo
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- CN107725044A CN107725044A CN201710890784.3A CN201710890784A CN107725044A CN 107725044 A CN107725044 A CN 107725044A CN 201710890784 A CN201710890784 A CN 201710890784A CN 107725044 A CN107725044 A CN 107725044A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000006698 induction Effects 0.000 title claims abstract description 21
- 238000012360 testing method Methods 0.000 claims abstract description 41
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 11
- 238000004364 calculation method Methods 0.000 claims abstract description 10
- 238000012937 correction Methods 0.000 claims abstract description 6
- 238000000611 regression analysis Methods 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 claims description 62
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 16
- 239000003345 natural gas Substances 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 4
- 230000033228 biological regulation Effects 0.000 claims description 3
- 239000009096 changqing Substances 0.000 claims description 3
- 239000008398 formation water Substances 0.000 claims description 3
- 239000003209 petroleum derivative Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 description 7
- 239000012071 phase Substances 0.000 description 5
- 239000008346 aqueous phase Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 241000700647 Variola virus Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013524 data verification Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000029052 metamorphosis Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- Geochemistry & Mineralogy (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a kind of method of the Sandstone Gas Bearing reservoir producing water ratio prediction based on array induction, laterolog, water saturation S is calculated using array induction depth resistivity as formation resistivityw；Water saturation SwThe difference of the water saturation obtained with lateral deep resistivity is increment D through the correction of shale irreducible water saturation；Calculate the increment D of reservoir and the ratio of gas saturationCalculate individual layer gas testing producing water ratio；According to the result that gas testing producing water ratio calculates withThe consistent block of reservoir lithology is selected to carry out regression analysis：When gas testing producing water ratio<When 10%, then prediction data byHave a great influence, in ratio<When 10%, two range fit gas testing producing water ratio calculation formula are given；When gas testing producing water ratio >=10%, then producing water ratio is calculated by regression formula.The present invention utilizes the different resistivity response characteristic of stratum different existence state fluid, establishes region producing water ratio predictive equation, this method accurate and effective, is predicted available for Sandstone Gas Bearing reservoir producing water ratio.
Description
Technical field
The present invention relates to one kind under the conditions of scale pressure break, the Sandstone Gas Bearing reservoir production based on array induction, laterolog
The method of water rate prediction.
Background technology
Sandstone producing water ratio is calculated typically by calculating the saturation degree of reservoir, then the relative permeability reality to calculating different fluid
Existing.
For sandstone reservoir, because variation of lithological is big, complex pore structure causes reservoir irreducible water saturation and mutually oozes song
The metamorphosis of line is big.In order to exclude the influence of irreducible water saturation change, producing water ratio prediction is carried out using Conventional Logs,
Typically use normalized, using Bi Erxun empirical equations etc. first calculate oil phase, aqueous phase relative permeability, further according to production
Producing water ratio is calculated in water rate accounting equation.But this method is limited to calculating and the regional well ginseng of stratum irreducible water saturation
Number, error are larger；The reservoir of reservoir irreducible water saturation change greatly is caused for complex pore structure, this method applicability is not
It is good.
There is scholar first to water saturation normalized, further according to statistical law, using incomplete Beta function representations
The relation of producing water ratio and water saturation, certain application effect is achieved in Xinjiang oil field.
The content of the invention
In order to improve the accuracy of sandstone reservoir flow net model, for Sandstone Gas Bearing reservoir, due to the viscosity of air water
Bigger than difference, it by coefficient and water, gas phase relative permeability ratio of natural gas and stratum water ratio of viscosities is just that producing water ratio, which is one,
Than the function of relation.And aqueous vapor phase relative permeability ratio is the exponential function of mobile water saturation, therefore one kind can be utilized
Based on array induction, the sandstone reservoir mobile water saturation quantitative assessment of laterolog method in the mobile water saturation that provides
Quantitative assessment parameter is fitted producing water ratio.
The present invention is according to different zones gas testing data, it is necessary to establish with a kind of sandstone based on array induction, laterolog
The mobile water saturation quantitative assessment parameter provided in the method for reservoir mobile water saturation quantitative assessment is referred to producing water ratio
Number fitting, obtains producing water ratio predictive equation.
The present invention is realized by following technical proposals.
A kind of method of the Sandstone Gas Bearing reservoir producing water ratio prediction based on array induction, laterolog, comprises the following steps：
1) water saturation S is calculated using Archie formulaw；
2) water saturation SwThe difference for the water saturation being calculated with lateral deep resistivity passes through shale irreducible water
Saturation correction is increment D；
3) increment D and the ratio of gas saturation are calculated
4) individual layer gas testing producing water ratio is carried out according to oil testing result to calculate；
3) select the consistent block of reservoir lithology, gas testing producing water ratio withRegression analysis is carried out, obtains regression equation；
4) when gas testing producing water ratio<When 10%, then prediction data is by mobile water saturation quantitative assessment parameterData shadow
Sound is larger, thereforeWhen, give two range fit gas testing producing water ratio calculation formula and use.
Further, in the step 1), Archie formula is as follows：
Archie formula：
Wherein：
SwFor water saturation, %；φ is porosity, %；RwFor formation water resistivity, Ω .m；RtFor rock true resistance
Rate, Ω .m；A, b, m, n are respectively litho-electric parameters, dimensionless.
Further, in the step 2), increment D is obtained by following formula：
D=SwI-ak*SH-SwL
Wherein：SwITo sense the water saturation that deep resistivity calculates, %；Ak is the Shale Correction factor, dimensionless； SH
For shale content, %；SwLThe water saturation calculated for lateral deep resistivity, %.
Further, in the step 4), according to DZ/T 0217-2005《Petroleum gas reserves calculate specification》And SY/T
6451—2000《Prospect pit logging data processing interpretation technique specification》Formulate《Changqing oilfields well log interpretation coincidence rate counts detailed rules and regulations》, enter
Row individual layer producing water ratio calculates.
Further, in the step 5), remove poor gas-bearing formation and the gas-bearing formation point that 10 producing water ratios therein are 0, only retain bag
The gas testing point of gassy water two-phase, carry out gas testing producing water ratio calculating.
Further, gas testing producing water ratio calculation formula is as follows：
Wherein, c is natural gas and stratum water ratio of viscosities；A, b is coefficient.
Further, in the step 6), two range fit gas testing producing water ratio calculation formula is given and are used：
A) whenWhen,
B) whenWhen, fw=0；
Wherein, fwFor gas testing producing water ratio.
The present invention is a kind of under the conditions of scale pressure break, the Sandstone Gas Bearing reservoir production water based on array induction, laterolog
The method of rate prediction, establishes region producing water ratio predictive equation, passes through gas testing data verification, it was confirmed that the present invention can contain to sandstone
Gas reservoir producing water ratio carries out accurately sentencing knowledge.
Exponential relationship of this method based on Sandstone Gas Bearing reservoir producing water ratio and mobile water saturation, utilizes mobile water saturation
The moveable water quantitative assessment parameter that the method for quantitative assessment calculates, is fitted with region reservoir producing water ratio, can be quick and precisely
Reservoir producing water ratio is evaluated, add the precision of sandstone reservoir flow net model.
The present invention takes full advantage of the different resistivity response characteristic of the fluid of stratum different existence state, has excavated air water
The information of two-phase viscosity differences, establish region producing water ratio predictive equation.Verified by gas testing, it was confirmed that the present invention is in gas sand
Accuracy and validity in terms of reservoir producing water ratio prediction.The present invention can be used for Sandstone Gas Bearing reservoir producing water ratio to predict.
Brief description of the drawings
Fig. 1 is smallpox north section and Susie block D/SgL and producing water ratio graph of a relation；
Fig. 2 is the single examination layer checking of day ring north section 8；
Fig. 3 is producing water ratio interpretation results figure.
Embodiment
The invention will be described in further detail with reference to the accompanying drawings and examples, but is not intended as doing any limit to invention
The foundation of system.
A kind of method of the Sandstone Gas Bearing reservoir producing water ratio prediction based on array induction, laterolog, with Sulige gas field of reviving
Susie block and day ring down warping region north section are the target block of research, and the single examination layer of 36,19 mouthfuls of wells of this area is studied.
1) it is public based on A Erqi first respectively using array induction depth resistivity and lateral deep resistivity as formation resistivity
Formula calculates water saturation Sw, Archie formula is as follows：
Archie formula：
Wherein：
SwFor water saturation, %；φ is porosity, %；RwFor formation water resistivity, Ω .m；RtFor rock true resistance
Rate, Ω .m；A, b, m, n are respectively litho-electric parameters, dimensionless.
2) the water saturation S using array induction depth resistivity as formation resistivity is calculatedwIMake with lateral deep resistivity
For the difference of the water saturation of formation resistivity, corrected by shale irreducible water saturation, obtain increment D.Increment D is under
Formula obtains：
D=SwI-ak*SH-SwL
Wherein：SwITo sense the water saturation that deep resistivity calculates, %；Ak is the Shale Correction factor, dimensionless；SH is
Shale content, %；SwLThe water saturation calculated for lateral deep resistivity, %.
3) increment D and the ratio of gas saturation are calculated
4) according to DZ/T 0217-2005《Petroleum gas reserves calculate specification》With SY/T 6451-2000《Prospect pit
Logging data processing interpretation technique specification》Formulate《Changqing oilfields well log interpretation coincidence rate counts detailed rules and regulations》, carry out individual layer producing water ratio meter
Calculate.
5) remove poor gas-bearing formation and the gas-bearing formation point that 10 producing water ratios therein are 0, only retain the gas testing point for including air water two-phase,
Carry out gas testing producing water ratio calculating.According to the result that gas testing producing water ratio calculates withThe consistent block of selection reservoir lithology is returned
Return analysis：
Wherein, c is natural gas and stratum water ratio of viscosities；A, b is coefficient.It is that mobile water saturation is quantitatively commented to see Fig. 1, Fig. 1
Valency parameterWith the equation regression figure of gas testing producing water ratio, based on this mode, the producing water ratio calculating side of reservoir to be evaluated can obtain
Journey.
6) when gas testing producing water ratio<When 10%, then prediction data is by mobile water saturation quantitative assessment parameterData shadow
Sound is larger, thereforeWhen, give two range fit gas testing producing water ratio calculation formula and use：
A) whenWhen,
B) whenWhen, fw=0；
Wherein, fwFor gas testing producing water ratio.
The technical principle that the present invention uses is：
For air-water two phase flow body, the relation of producing water ratio and relative permeability is：
Because the viscosity of natural gas and stratum water is bigger, therefore 1. " 1 " in formula denominator can be considered as 0 value.Then 1. formula
It can be converted into
C is natural gas and stratum water ratio of viscosities, is approximately constant in a block.2. formula show producing water ratio with it is natural
Gas and stratum aqueous phase are directly proportional to permeability ratio.
Natural gas and stratum aqueous phase are to permeability ratioRelation with water saturation is：
Wherein a, b is coefficient, dimensionless.
The data of mobile water saturation are substituted into, then 2., 3. formula can be converted into
From 2., 4. formula：Producing water ratio fwWith mobile water saturation SwmExponent function relation.
Based on array induction, the sandstone reservoir mobile water saturation quantitative assessment of laterolog method in calculate
Quantificational expression mobile water saturation can be used for, therefore directly will
Instead of SwmUse, then can obtain：
5. formula can be used to calculate producing water ratio.
Influenceed because air water mutually oozes rule by rock wettability, thus regression analysis should try one's best selection reservoir lithology compared with
Consistent block.
With reference to day ring north 8 mouthfuls of section, 8, well, singly examination layer oil testing result carries out applicability and validation verification to producing water ratio formula,
As shown in Figure 2, Fig. 2 is that reservoir calculates producing water ratio and gas testing producing water ratio cross plot, it can be seen that result of calculation is consistent with gas testing.
8 single examination layers being calculatedCalculate data and be shown in Table 1 with oil testing result.
Table 1 examines well gas testing interval interpretation results table
Fig. 3 is the application example of this method a bite well, and the 12nd is to calculate producing water ratio, scale 0-100%.Wherein,
No. 43 floor, No. 52 floor, No. 53 independent gas testing of floor.It can be seen that producing water ratio result of calculation is accurate.
The invention is not limited in above-described embodiment, on the basis of technical scheme disclosed by the invention, the skill of this area
Art personnel are according to disclosed technology contents, it is not necessary to which performing creative labour can makes one to some of which technical characteristic
A little to replace and deform, these are replaced and deformation is within the scope of the present invention.
Claims (7)
1. the method for the Sandstone Gas Bearing reservoir producing water ratio prediction based on array induction, laterolog, it is characterised in that including following
Step：
1) using array induction depth resistivity as formation resistivity, water saturation S is calculated using Archie formulaw；
2) water saturation SwThe difference for the water saturation being calculated with lateral deep resistivity passes through shale irreducible water saturation
Correction is increment D；
3) increment D and the ratio of gas saturation are calculated
4) establishing criteria carries out the calculating of individual layer gas testing producing water ratio；
5) select the consistent block of reservoir lithology, gas testing producing water ratio withRegression analysis is carried out, obtains regression equation：
6) when gas testing producing water ratio<When 10%, then prediction data byHave a great influence, thereforeWhen, give two
Individual range fit gas testing producing water ratio calculation formula uses；When gas testing producing water ratio >=10%, then producing water ratio is calculated by regression formula.
2. the method for the Sandstone Gas Bearing reservoir producing water ratio prediction according to claim 1 based on array induction, laterolog,
Characterized in that, in the step 1), Archie formula is as follows：
Archie formula：
Wherein：
SwFor water saturation, %；φ is porosity, %；RwFor formation water resistivity, Ω .m；RtFor rock true resistivity, Ω
.m；A, b, m, n are respectively litho-electric parameters, dimensionless.
3. the method for the Sandstone Gas Bearing reservoir producing water ratio prediction according to claim 1 based on array induction, laterolog,
Characterized in that, in the step 2), increment D is obtained by following formula：
D=SwI-ak*SH-SwL
Wherein：SwITo sense the water saturation that deep resistivity calculates, %；Ak is the Shale Correction factor, dimensionless；SH is shale
Content, %；SwLThe water saturation calculated for lateral deep resistivity, %.
4. the method for the Sandstone Gas Bearing reservoir producing water ratio prediction according to claim 1 based on array induction, laterolog,
Characterized in that, in the step 4), according to DZ/T 0217-2005《Petroleum gas reserves calculate specification》And SY/T
6451—2000《Prospect pit logging data processing interpretation technique specification》Formulate《Changqing oilfields well log interpretation coincidence rate counts detailed rules and regulations》, enter
Row individual layer producing water ratio calculates.
5. the method for the Sandstone Gas Bearing reservoir producing water ratio prediction according to claim 1 based on array induction, laterolog,
Characterized in that, in the step 5), remove poor gas-bearing formation and the gas-bearing formation point that 10 producing water ratios therein are 0, only retain and include gas
The gas testing point of water two-phase, carry out gas testing producing water ratio calculating.
6. the method for the Sandstone Gas Bearing reservoir producing water ratio prediction according to claim 5 based on array induction, laterolog,
Characterized in that, gas testing producing water ratio calculation formula is as follows：
<mrow>
<msub>
<mi>f</mi>
<mi>w</mi>
</msub>
<mo>=</mo>
<msup>
<mi>cae</mi>
<mrow>
<mi>b</mi>
<mfrac>
<mi>D</mi>
<msub>
<mi>S</mi>
<mrow>
<mi>g</mi>
<mi>L</mi>
</mrow>
</msub>
</mfrac>
</mrow>
</msup>
</mrow>
Wherein, c is natural gas and stratum water ratio of viscosities；A, b is coefficient.
7. the method for the Sandstone Gas Bearing reservoir producing water ratio prediction according to claim 1 based on array induction, laterolog,
Characterized in that, in the step 6), give two range fit gas testing producing water ratio calculation formula and use：
A) whenWhen,
B) whenWhen, fw=0；
Wherein, fwFor gas testing producing water ratio.
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Cited By (4)
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| CN109766615A (en) * | 2018-12-29 | 2019-05-17 | 中国石油天然气集团有限公司 | A kind of reservoir producing water ratio calculation method based on view resistivity reservoir curve |
| CN110017136A (en) * | 2019-03-14 | 2019-07-16 | 中国石油天然气集团有限公司 | A kind of Water Flooding Layer identification and producing water ratio prediction technique based on view water layer resistivity |
| CN112392464A (en) * | 2020-12-11 | 2021-02-23 | 中国石油天然气集团有限公司 | Method for calculating reservoir water production rate based on conventional logging information |
| CN112926275A (en) * | 2021-01-19 | 2021-06-08 | 中国石油天然气集团有限公司 | Method for constructing compact sandstone reservoir water yield prediction model |
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