CN108363117B - Feldspar corrosion increases the quantitative forecasting technique of hole amount - Google Patents
Feldspar corrosion increases the quantitative forecasting technique of hole amount Download PDFInfo
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- 238000005260 corrosion Methods 0.000 title claims abstract description 86
- 230000007797 corrosion Effects 0.000 title claims abstract description 86
- 239000010433 feldspar Substances 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000011160 research Methods 0.000 claims abstract description 36
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 35
- 239000011435 rock Substances 0.000 claims abstract description 6
- 238000010276 construction Methods 0.000 claims abstract description 5
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 25
- DLHONNLASJQAHX-UHFFFAOYSA-N aluminum;potassium;oxygen(2-);silicon(4+) Chemical group [O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Si+4].[Si+4].[Si+4].[K+] DLHONNLASJQAHX-UHFFFAOYSA-N 0.000 claims description 10
- 229910052661 anorthite Inorganic materials 0.000 claims description 10
- GWWPLLOVYSCJIO-UHFFFAOYSA-N dialuminum;calcium;disilicate Chemical group [Al+3].[Al+3].[Ca+2].[O-][Si]([O-])([O-])[O-].[O-][Si]([O-])([O-])[O-] GWWPLLOVYSCJIO-UHFFFAOYSA-N 0.000 claims description 10
- 238000004364 calculation method Methods 0.000 claims description 8
- 229910052656 albite Inorganic materials 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 238000011156 evaluation Methods 0.000 claims description 3
- 238000005192 partition Methods 0.000 claims description 3
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 230000002123 temporal effect Effects 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims 1
- 239000011148 porous material Substances 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 abstract description 6
- 230000007246 mechanism Effects 0.000 abstract description 2
- 208000035126 Facies Diseases 0.000 abstract 1
- 230000008021 deposition Effects 0.000 description 15
- XYQHCDPZBXIAGW-UHFFFAOYSA-N Andesine Natural products COC(=O)C1=Cc2ccc3c(CCN(C)C)cc(OC)c(O)c3c2C(=O)O1 XYQHCDPZBXIAGW-UHFFFAOYSA-N 0.000 description 4
- 229910052658 andesine Inorganic materials 0.000 description 4
- 239000012736 aqueous medium Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
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Abstract
The invention discloses the quantitative forecasting techniques that a kind of feldspar corrosion increases hole amount, this method considers that corrosion is to the influence degree of feldspar in increasing hole mechanism, this its pass through the Diagenetic Facies of research area's destination layer studied, set up the temperature model and depth model of feldspar corrosion, binding area construction depth, diagenetic stage, fluid environment, and influence factor of feldspar during corrosion, from feldspar type, pH value, three aspects of temperature establish model formation, determine feldspar solution amount and secondary pore increase and decrease situation, and then the increasing hole amount of quantitative assessment clastic reservoir rock feldspar corrosion, foundation is provided for pore evolution.
Description
Technical field
The present invention relates to oil-gas exploration and development technical fields, increase the quantitative forecast side of hole amount in particular to a kind of feldspar corrosion
Method.
Background technique
With the continuous improvement of energy exploration developmental research and modern test technology, influence of the diagenesis to reservoir is ground
Study carefully and is also more widely paid close attention to.Tight sand can be transformed into reservoir by the corrosion in diagenesis, and corrosion is made
A large amount of Genesis of Secondary Pores are produced during the progress, are to form one of most important Constructive diagenesis of reservoir.
It plays an important role to petroleum geology exploration.China such as Sichuan Basin, Ordos Basin.Song-liao basin largely needs
The reservoir properties to be studied are all poor, mostly low porosity and low permeability stratum, and rock type is mostly fine and close sandstone.
There is sizable improvement result to the reservoir properties of low porosity and low permeability by largely studying discovery corrosion, generally
All it is that mid-term in diagenesis evolution stage or middle and later periods corrosion are the most obvious, porosity can be increased mostly, improves storage
Layer physical property.The porosity of sandstone reservoir can be improved in skeleton particle of the feldspar as sandstone reservoir, lysigenous secondary pore
And permeability, especially have great importance to the sandstone reservoir of low intergranular pore.
Currently, the one-sided factor that existing method only considered feldspar corrosion influences, such as single in feldspar corrosion research process
It is pure to establish model in terms of certain is single from temperature, solution ph or the rate of settling, but since corrosion is influenced by numerous
Factor, multi mineral species cross influences, so that existing prediction technique is single, unilateral, not can be carried out comprehensive and quantitative prediction.
Summary of the invention
Object of the present invention is in view of the shortcomings of the prior art, providing a kind of quantitative forecasting technique of feldspar corrosion increasing hole amount.
This method consider in increasing hole mechanism corrosion to the influence degree of feldspar, this its by research area's destination layer at
Petrographic investigation, it is established that the temperature model and depth model of feldspar corrosion, binding area construction depth, diagenetic stage, fluid
Environment determines feldspar solution amount and secondary pore increase and decrease situation, and then the increasing hole amount of quantitative assessment clastic reservoir rock feldspar corrosion,
Foundation is provided for pore evolution.
To achieve the above object, a kind of feldspar corrosion provided by the invention increases the quantitative forecasting technique of hole amount, including following
Step:
1) analysis and research area's geologic aspects
2) diagenesis stage forecast model is established
(1) the evolution phase time is determined
Destination layer is divided in evolutionary phase experienced in earth history period, mesh according to target zone superstratum developmental state
The superstratum layer L have i layers, i.e., successively mark from top to bottom are as follows: L1, L2, L3 ... Li-1, Li, then target zone is gone through in geology
The history evolutionary phase in period shares i, and according to temporal evolution, target zone L evolution phase time sequencing is successively calculated as Li, Li-1, Li-
2……L2,L1；
(2) the not same period time buried depth is determined
Under the basis of step (1), the buried depth of target zone L difference evolution phase time is calculated, calculation formula is as follows:
Dep (Li)=H (L)-H (Li)；
Dep (Li-1)=H (L)-H (Li-1)；
Dep (Li-2)=H (L)-H (Li-2)；
……
Dep (L2)=H (L)-H2；
Dep (L1)=H (L)-H1；
Wherein: layer L pushes up interface for the purpose of H (L), and H (Li) is that overlying strata Li pushes up interface, layer Li stage for the purpose of Dep (Li)
Buried depth；
(3) the not same period time formation temperature is determined
For geologic body during burying, the size of temperature is expressed as the linear functional relation with depth, passes through following temperature
Computation model is spent, calculates target zone L in different times, different depth, different location formation temperature；Temperature calculation models formula:
T=T0+c* (D (Ti)-H0)
Wherein, T0 is room temperature band temperature, and c is constant, layer Ti stage buried depth for the purpose of Dep (Ti), and H0 is zone of constant temperature buried depth,
For constant, T is destination layer paleogeotherm；
(4) the not same period time stratum diagenetic stage DS is determined
3) basic evaluation is carried out to research area's substance and diagenesis divides,
Corrosion region and the region andesine are distinguished by the range of corrosion；By the feldspar corrosion zone of action
Grid dividing is carried out, the purpose of grid dividing is exactly model to be separated into many small units；
4) corrosion is analyzed, and is evaluated the factor for influencing feldspar corrosion under varying environment, according to clastic rock diagenesis
Divided stages standard (SY/T5477-2003) Research on partition area diagenetic stage, obtains feldspar under different sedimentary aqueous medias
Carry out diagenetic stage and the ancient room temperature section of corrosion；
5) on the basis of 4), in conjunction with influence factor of feldspar during corrosion, from feldspar type, pH value, temperature
It spends three aspects and establishes model formation,
LgS=a (k1x3+k2x2+k3x+k4)
Wherein: S is feldspar corrosion percentage composition；
X is pH value；
A=[0.8,1.2]；
k1=[- 0.011, -0.0015]；
k2=[0.1,0.4]；
k3=[- 4.05, -1.5]；
k4=[2,10]；
Identify 3 end members of feldspar, analysis obtains the type of different feldspars, calculates different type feldspar using above-mentioned formula
Corrosion percentage composition under different temperatures section and different pH condition, i.e. corrosion increase hole amount.
Further, in the step 1), research area's geologic aspects includes geology background, basin type, construction spy
It seeks peace the background content on related stratum.
Still further, in step 1) (4) small step,
When T ∈ [20~65), DS is early diagenetic stage early stage, as I A；
When T ∈ [65~85), DS is early diagenetic stage advanced stage, as I B；
When T ∈ [85~140), DS is middle diagenetic stage early stage, i.e. II A；
When T ∈ [140~175), DS be middle diagenetic stage advanced stage, as II B；
When T ∈ [175~200), DS is late diagenetic stage, as III.
Still further, when feldspar is anorthite, calculating anorthite in difference by following formula in the step 5)
Corrosion percentage composition under temperature range, different pH condition
Anorthite:
LgS=a (- 0.011x3+0.378x2-4.0227x+9.0339)
When feldspar is albite, albite is calculated under different temperatures section, different pH condition by following formula
Corrosion percentage composition；
LgS=a (- 0.0015x3+0.1087x2-1.5189x+2.4025)
When feldspar is potassium feldspar, potassium feldspar is calculated under different temperatures section, different pH condition by following formula
Corrosion percentage composition；
Potassium feldspar:
LgS=a (- 0.0077x3+0.2303x2-2.2363x+3.3076)
Wherein: S is feldspar corrosion percentage composition；
X is pH value；
When 85 DEG C of T <, a=0.8；When 85 DEG C 140 DEG C of < T <, a=1；
When 140 DEG C 175 DEG C of < T <, a=1.2.
The beneficial effects of the present invention are:
1) method of the invention has quantitative meaning to the hole that corrosion is formed, and corrosion can be speculated to porosity
Influence.
2) present invention is theoretical sufficiently, according to the corrosion process of feldspar corrosion and the representation of feldspar corrosion, sufficiently slaps
The main flow of feldspar corrosion is held；
3) present invention is by the foundation of collective model, can be certain grasp effect and meaning of the spectra corrosion in molten
Justice, the research for corrosion andesine mineral dissolution provide sufficient foundation
Detailed description of the invention
Fig. 1 is research area Plain group structural contour map；
Fig. 2 is the research town Qu Minghua group structural contour map；
Fig. 3 is research area Guantao group structural contour map；
Fig. 4 is research two sections of structural contour maps of area's Dongying Formation；
Two sections of fluid distribution patterns of Dongying Formation when Fig. 5 is research area Guantao group deposition；
Two sections of fluid distribution patterns of Dongying Formation when Fig. 6 is the research town Qu Minghua group deposition；
Two sections of fluid distribution patterns of Dongying Formation when Fig. 7 is research area Plain group deposition；
Two sections of temperature maps of Dongying Formation when Fig. 8 is research area Guantao group deposition；
Two sections of temperature maps of Dongying Formation when Fig. 9 is the research town Qu Minghua group deposition；
Two sections of temperature maps of Dongying Formation when Figure 10 is research area Plain group deposition；
Two sections of diagenetic stage figures of Dongying Formation when Figure 11 is research area Guantao group deposition；
Two sections of diagenetic stage figures of Dongying Formation when Figure 12 is the research town Qu Minghua group deposition；
Two sections of diagenetic stage figures of Dongying Formation when Figure 13 is research area Plain group deposition；
Two Duan Changshi corrosion figure of Dongying Formation when Figure 14 is research area Guantao group deposition；
Two Duan Changshi corrosion figure of Dongying Formation when Figure 15 is the research town Qu Minghua group deposition；
Two Duan Changshi corrosion figure of Dongying Formation when Figure 16 is research area Plain group deposition；
Two sections of feldspar corrosion amount distribution maps of Dongying Formation when Figure 17 is research area Guantao group deposition；
Two sections of feldspar corrosion amount distribution maps of Dongying Formation when Figure 18 is the research town Qu Minghua group deposition；
Two sections of feldspar corrosion amount distribution maps of Dongying Formation when Figure 19 is research area Plain group deposition；
Specific embodiment
In order to better explain the present invention, below in conjunction with the specific embodiment main contents that the present invention is furture elucidated, but
The contents of the present invention are not limited solely to following embodiment.
Embodiment 1
Feldspar corrosion increases the quantitative forecasting technique of hole amount, comprising the following steps:
1) analysis and research area's geologic aspects
Including geology background, basin type, construction feature, the background content on related stratum
2) diagenesis stage forecast model is established
(1) the evolution phase time is determined
Destination layer is divided in evolutionary phase experienced in earth history period, mesh according to target zone superstratum developmental state
The superstratum layer L have i layers, i.e., successively mark from top to bottom are as follows: L1, L2, L3 ... Li-1, Li, then target zone is gone through in geology
The history evolutionary phase in period shares i, and according to temporal evolution, target zone L evolution phase time sequencing is successively calculated as Li, Li-1, Li-
2……L2,L1；
(2) the not same period time buried depth is determined
Under the basis of step (1), the buried depth of target zone L difference evolution phase time is calculated, calculation formula is as follows:
Dep (Li)=H (L)-H (Li)；
Dep (Li-1)=H (L)-H (Li-1)；
Dep (Li-2)=H (L)-H (Li-2)；
……
Dep (L2)=H (L)-H2；
Dep (L1)=H (L)-H1；
Wherein: layer L pushes up interface for the purpose of H (L), and H (Li) is that overlying strata Li pushes up interface, layer Li stage for the purpose of Dep (Li)
Buried depth；
(3) the not same period time formation temperature is determined
For geologic body during burying, the size of temperature is represented by the linear functional relation with depth, passes through the mould
Type can calculate target zone L in different times, different depth, different location formation temperature；
Temperature calculation models formula:
T=T0+c* (D (Ti)-H0)
Wherein T0 is room temperature band temperature, and c is constant, layer Ti stage buried depth for the purpose of Dep (Ti), and H0 is zone of constant temperature buried depth,
For constant, T is destination layer paleogeotherm；
(4) the not same period time stratum diagenetic stage is determined
When T ∈ [20~65), DS is early diagenetic stage early stage, as I A；
When T ∈ [65~85), DS is early diagenetic stage advanced stage, as I B；
When T ∈ [85~140), DS is middle diagenetic stage early stage, i.e. II A；
When T ∈ [140~175), DS be middle diagenetic stage advanced stage, as II B；
When T ∈ [175~200), DS is late diagenetic stage, as III；
3) basic evaluation is carried out to research area's substance and diagenesis divides, distinguish corrosion region and the region
Range of the andesine by corrosion；The feldspar corrosion zone of action is subjected to grid dividing, the purpose of grid dividing is exactly mould
Type is separated into many small units；
4) corrosion is analyzed, and is evaluated the factor for influencing feldspar corrosion under varying environment, according to clastic rock diagenesis
Divided stages standard (SY/T5477-2003) Research on partition area diagenetic stage, obtains feldspar under different sedimentary aqueous medias
Carry out diagenetic stage and the ancient room temperature section of corrosion；
5) on the basis of 4), in conjunction with influence factor of feldspar during corrosion, from feldspar type, pH value, temperature
It spends three aspects and establishes model formation,
LgS=a (k1x3+k2x2+k3x+k4)
Wherein: S is feldspar corrosion percentage composition；
X is pH value；
A=[0.8,1.2]；
k1=[- 0.011, -0.0015]；
k2=[0.1,0.4]；
k3=[- 4.05, -1.5]；
k4=[2,10]；
Identify 3 end members of feldspar, analysis obtains the type of different feldspars, calculates different type feldspar using above-mentioned formula
Corrosion percentage composition under different temperatures section and different pH condition, i.e. corrosion increase hole amount.
When feldspar is anorthite, anorthite is calculated under different temperatures section, different pH condition by following formula
Corrosion percentage composition
Anorthite:
LgS=a (- 0.011x3+0.378x2-4.0227x+9.0339)
When feldspar is albite, albite is calculated under different temperatures section, different pH condition by following formula
Corrosion percentage composition；
LgS=a (- 0.0015x3+0.1087x2-1.5189x+2.4025)
When feldspar is potassium feldspar, potassium feldspar is calculated under different temperatures section, different pH condition by following formula
Corrosion percentage composition；
Potassium feldspar:
LgS=a (- 0.0077x3+0.2303x2-2.2363x+3.3076)
Wherein: S is feldspar corrosion percentage composition；
X is pH value；
When 85 DEG C of T <, a=0.8；When 85 DEG C 140 DEG C of < T <, a=1；
When 140 DEG C 175 DEG C of < T <, a=1.2.
Embodiment 2
Hole amount is increased to the two sections of feldspar corrosions of Dongying Formation that are recessed in Bohai Sea based on the above method and carries out quantitative forecast, specific method step
It is rapid as follows:
1) analysis and research area's geologic aspects
By in Bohai Sea be recessed two sections of Dongying Formation for, collect two sections of each evolutionary phases of Dongying Formation structural contour map (Fig. 1,
Fig. 2, Fig. 3, Fig. 4), fluid distribution pattern (Fig. 5, Fig. 6, Fig. 7), ground temperature (Fig. 8, Fig. 9, Figure 10) determine diagenetic stage
2) diagenetic stage is determined
(1) the evolution phase time is determined
Two sections of superstratums of Dongying Formation are successively Plain group, the town Ming Hua group and Guantao group from top to bottom, i.e., from top to bottom
It is successively labeled as L1, L2, L3, then studies area and the evolution phase time shares 3, temporally develop, the evolution phase time of two sections of L of Dongying Formation is first
Sequence is successively calculated as L3, L2, L1 afterwards；
(2) the not same period time buried depth is determined
Under the basis of (1), the buried depth of two sections of L differences evolution phases time of Dongying Formation is calculated, calculation formula is as follows:
Dep (Li)=H (L)-H (Li)；
Dep (Li-1)=H (L)-H (Li-1)；
Dep (Li-2)=H (L)-H (Li-2)；
……
Dep (L2)=H (L)-H2；
Dep (L1)=H (L)-H1；
Wherein: layer L pushes up interface for the purpose of H (L), and H (Li) is that overlying strata Li pushes up interface, layer Li stage for the purpose of Dep (Li)
Buried depth；
(3) the not same period time formation temperature is determined
For geologic body during burying, the size of temperature is represented by the linear functional relation with depth, passes through the mould
Type can calculate target zone L in different times, different depth, different location formation temperature；
Temperature calculation models formula:
T=T0+c* (D (Ti)-H0)
Wherein T0=21 DEG C, c=0.0031 DEG C/m, layer Ti stage buried depth for the purpose of Dep (Ti), H0=30m, T are target
Layer paleogeotherm；
(4) the not same period time stratum diagenetic stage (Figure 11, Figure 12, Figure 13) is determined
When T ∈ [20~65), DS is early diagenetic stage early stage, as I A；
When T ∈ [65~85), DS is early diagenetic stage advanced stage, as I B；
When T ∈ [85~140), DS is middle diagenetic stage early stage, i.e. II A；
When T ∈ [140~175), DS be middle diagenetic stage advanced stage, as II B；
When T ∈ [175~200), DS is late diagenetic stage, as III；
3) diagenesis division is carried out to two sections of substances of Dongying Formation, distinguishes corrosion region and the region andesine
By the range (Figure 14, Figure 15, Figure 16) of corrosion；The feldspar corrosion zone of action is subjected to grid dividing
4) 450 meters of grid W20 depth, T=68.5, DS are early diagenetic stage early stage, and as I B is in fresh water aqueous medium ring
Border, pH value 7.1, feldspar type are albite, substitute into formula and lgS=-3.43899, corrosion percentage composition S=is calculated
0.0364% (Figure 17)；
1105 meters of grid W30 depth, T=92, DS are middle diagenetic stage early stage, i.e. II A is in acidic aqueous media environment,
PH value is 5.4, and feldspar type is anorthite, substitutes into formula and lgS=-4.07796, corrosion percentage composition S=is calculated
0.00836% (Figure 18)；
2220 meters of grid W40 depth, T=123, DS are middle diagenetic stage early stage, i.e. II A is in alkaline aqueous medium environment,
PH value is 9.7, and feldspar type is potassium feldspar, substitutes into formula and lgS=-4.4918, corrosion percentage composition S=is calculated
0.00322% (Figure 19).
Other unspecified parts are the prior art.Although above-described embodiment is made that the present invention and retouches in detail
State, but it is only a part of the embodiment of the present invention, rather than whole embodiments, people can also according to the present embodiment without
Other embodiments are obtained under the premise of creativeness, these embodiments belong to the scope of the present invention.
Claims (4)
1. the quantitative forecasting technique that a kind of feldspar corrosion increases hole amount, it is characterised in that: the following steps are included:
1) analysis and research area's geologic aspects
2) diagenesis stage forecast model is established
(1) the evolution phase time is determined
Destination layer is divided in evolutionary phase experienced in earth history period, target zone according to target zone superstratum developmental state
The superstratum L has i layers, i.e., successively marks from top to bottom are as follows: L1, L2, L3 ... Li-1, Li, then target zone is in earth history
Evolutionary phase phase shares i, and according to temporal evolution, target zone L evolution phase time sequencing is successively calculated as Li, Li-1, Li-
2……L2,L1；
(2) the not same period time buried depth is determined
Under the basis of step (1), the buried depth of target zone L difference evolution phase time is calculated, calculation formula is as follows:
Dep (Li)=H (L)-H (Li)；
Dep (Li-1)=H (L)-H (Li-1)；
Dep (Li-2)=H (L)-H (Li-2)；
……
Dep (L2)=H (L)-H2；
Dep (L1)=H (L)-H1；
Wherein: layer L pushes up interface for the purpose of H (L), and H (Li) is that overlying strata Li pushes up interface, layer Li stage buried depth for the purpose of Dep (Li)；
(3) the not same period time formation temperature is determined
For geologic body during burying, the size of temperature is expressed as the linear functional relation with depth, passes through following thermometers
Model is calculated, calculates target zone L in different times, different depth, different location formation temperature；Temperature calculation models formula:
T=T0+c* (Dep (Ti)-H0)
Wherein, T0 is room temperature band temperature, and c is constant, layer Ti stage buried depth for the purpose of Dep (Ti), and it is normal that H0, which is zone of constant temperature buried depth,
Number, T are destination layer paleogeotherm；
(4) the not same period time stratum diagenetic stage DS is determined
3) basic evaluation is carried out to research area's substance and diagenesis divides, distinguished long in corrosion region and the region
Range of the stone by corrosion；The feldspar corrosion zone of action is subjected to grid dividing；
4) corrosion is analyzed,
The factor that feldspar corrosion is influenced under varying environment is evaluated, according to clastic rock division of diagenetic stage standard Research on partition
Area's diagenetic stage obtains diagenetic stage and the ancient room temperature section of carry out corrosion of the feldspar under different sedimentary aqueous medias；
5) on the basis of 4), in conjunction with influence factor of feldspar during corrosion, from feldspar type, pH value, temperature three
A aspect establishes model formation,
LgS=a (k1x3+k2x2+k3x+k4)
Wherein: S is feldspar corrosion percentage composition；
X is pH value；
A=[0.8,1.2]；
k1=[- 0.011, -0.0015]；
k2=[0.1,0.4]；
k3=[- 4.05, -1.5]；
k4=[2,10]；
Identify 3 end members of feldspar, analysis obtains the type of different feldspars, calculates different type feldspar not using above-mentioned formula
Corrosion percentage composition under synthermal section and different pH condition, i.e. corrosion increase hole amount.
2. feldspar corrosion increases the quantitative forecasting technique of hole amount according to claim 1, it is characterised in that: in the step 1),
Research area's geologic aspects includes the background content of geology background, basin type, construction feature and related stratum.
3. feldspar corrosion increases the quantitative forecasting technique of hole amount according to claim 1, it is characterised in that: the step 2) the
(4) in small step,
When T ∈ [20~65), DS is early diagenetic stage early stage, as I A；
When T ∈ [65~85), DS is early diagenetic stage advanced stage, as I B；
When T ∈ [85~140), DS is middle diagenetic stage early stage, i.e. II A；
When T ∈ [140~175), DS be middle diagenetic stage advanced stage, as II B；
When T ∈ [175~200), DS is late diagenetic stage, as III.
4. feldspar corrosion increases the quantitative forecasting technique of hole amount according to claim 1, it is characterised in that:
In the step 5), when feldspar is anorthite, anorthite is calculated in different temperatures section, difference pH by following formula
Corrosion percentage composition under the conditions of value
Anorthite:
LgS=a (- 0.011x3+0.378x2-4.0227x+9.0339)
When feldspar is albite, it is molten under different temperatures section, different pH condition that albite is calculated by following formula
Lose percentage composition；
LgS=a (- 0.0015x3+0.1087x2-1.5189x+2.4025)
When feldspar is potassium feldspar, it is molten under different temperatures section, different pH condition that potassium feldspar is calculated by following formula
Lose percentage composition；
Potassium feldspar:
LgS=a (- 0.0077x3+0.2303x2-2.2363x+3.3076)
Wherein: S is feldspar corrosion percentage composition；
X is pH value；
When 85 DEG C of T <, a=0.8；When 85 DEG C 140 DEG C of < T <, a=1；
When 140 DEG C 175 DEG C of < T <, a=1.2.
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