CN104877655A - Preparation method of clean dissolution fracturing fluid CFs for dissolving rock and constructing nanometer apertures - Google Patents
Preparation method of clean dissolution fracturing fluid CFs for dissolving rock and constructing nanometer apertures Download PDFInfo
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Abstract
The invention discloses a preparation method of a clean dissolution fracturing fluid CFs for dissolving rock and constructing nanometer apertures and belongs to underground energy exploitation storage-increasing yield-increasing reservoir reconstruction. The preparation method is characterized in that according to underground rock components and principles of maximal dissolution rate of glue in apertures and aperture walls, and maximal fracturing pressure, fracturing construction pressure and displacement pressure decreasing, the clean dissolution fracturing fluid CFs is prepared from a low molecular rock solvent. The clean dissolution fracturing fluid CFs is used for construction of nanometer aperture-based multistage netty cracks and improves rock stratum adsorption gas and oil desorption speeds, a diversion capability, a storage capability and a yield. The clean dissolution fracturing fluid CFs has the advantages of good solubility at a low temperature, good expansion resistance and good resistance reduction and is especially suitable for pressing cracking of ultradense, strong water sensitive and high stress coalbed methane, shale oil and gas and ultradense oil gas stratums.
Description
Technical field:
The invention belongs to the fracturing liquid that in underground energy exploitation increasing the storage volume increase reservoir reconstruction, pressure break uses, the clean dissolving fracturing liquid CFs compound method of dissolving petrographic formation nanoporous seam is provided especially.
Note: dissolve and refer to that Dispersion of Solute Matter becomes the physical process of solution in solvent.Dissolving is not chemical reaction, can not generate novel substance.
Technical background:
Existing petroleum geology is the petroleum geology based on seepage flow, and existing petroleum engineering are the petroleum engineering based on seepage flow.Reserves examination & verification is based on porosity cutoff, is only being greater than the reservoir just calculated reserves of porosity cutoff.That is to say, existing petroleum geology and existing petroleum engineering all only consider to be greater than porosity cutoff, can the reservoir of seepage flow.Existing hydrocarbon-bearing pool of having developed is all that reserves abundance is very high can the reservoir of seepage flow.For in the nano grade pore seam below porosity cutoff, be enriched in the flood tide adsorbed gas, the adsorbed oil that are difficult to seepage flow in nanoporous seam with ADSORPTION STATE, all do not consider both at home and abroad to produce.The Objective Concept of reservoir can the high thin layer of seepage flow reserves abundance change into can the high thin layer of seepage flow reserves abundance and adsorbed gas, thick-layer that adsorbed oil content is high.
The countries such as the U.S. are successful commercialization exploiting coal bed methane, shale gas.Coal-seam gas gas reservoir, the shale gas gas reservoir of the country such as the U.S. are all oversaturated, i.e. hole, fracture development, and the free gas reserves in hole, crack are high, the free gas in the mainly hole of production, crack.75% is free gas, and 25% is adsorbed gas.
Coal-seam gas gas reservoir, the shale gas gas reservoir of China are all undersaturated substantially, i.e. hole, crack aplasia, the free gas in hole, crack does not almost have, and 95% is adsorbed gas.
Also there is no real adsorbed gas development theories and method both at home and abroad.
Shale oil is actual is adsorbed oil.The thick all enrichments shale oil of whole eight gulf, the road group 200 meters of Tarim Basin In Xinjiang.The oil-sand also enrichment adsorbed oil of shallow-layer.Also enrichment adsorbed oil in the basement rock of thick oil reservoir.
Adsorbed gas, adsorbed oil reserves are extremely huge.Rock is finer and close, and the content of adsorbed gas, adsorbed oil is larger.In the fine and close basement rock of the hydrocarbon-bearing pool of having developed, the content of adsorbed gas, adsorbed oil is also abnormal large.The clean fracturing liquid CFs that dissolves is as adsorbed gas, the spearhead adsorbing wet goods hydrocarbon-bearing pool pressure break, build, link up, expand nanoporous seam makes seam pilot hole seam as further pressure break, for carrying out acid fracturing further, nano level is built in sandfrac, micron order, grade, centimetre-sized map cracking create basis, really makes the reserves such as coal-seam gas, shale gas abnormal huge adsorbed gas, adsorbed oil suitability for industrialized production.
The hot dry rock heat energy power-generating that underground is deeper than 3000 meters has a high potential.All extremely show great attention to hot dry rock heat energy power-generating both at home and abroad, the international developed country such as the U.S., Canada has all dropped into huge fund exploitation hot dry rock heat energy power-generating for a long time, not yet realizes industrialization exploitation so far.Adopt clean dissolving fracturing liquid CFs pressure break, dissolve hot dry rock (mainly grouan) and form nanometer, micron openings seam, build the first seam guide of nano level, for carrying out acid fracturing further, sandfrac makes and builds nano level, micron order, grade, centimetre-sized map cracking, build hot dry rock and manually store up fluid layer, long-term sustainable exploitation hot dry rock heat energy power-generating.Earth any place can utilize hot dry rock heat energy power-generating.
Existing acidizing fluid speed of response is fast especially, and EFFECTIVE RANGE is extremely short, and easily forms sand plug.Existing fracturing liquid is difficult to the reservoir crushing super densification, high water-sensitive, high parting pressure.Even if crush reservoir also can only crush reservoir and make and build single seam, reservoir can be polluted.Both at home and abroad at present also not by dissolving the fracturing liquid of rock formation hole seam.
Summary of the invention:
The object of this invention is to provide a kind of without acid dissolve rock, build, link up, expand the clean dissolving fracturing liquid CFs compound method of nanoporous seam.The clean fracturing liquid CFs that dissolves can improve EFFECTIVE RANGE, makes the region of injection fluid process can dissolve construction, communication, expands nanoporous seam.Clean effect of dissolving fracturing liquid CFs is the nanometer bullport seam forming guide, form the multistage network cracks such as nanometer, micron, millimeter for follow-up pressure break and establish good basis, the real desorption rate realizing raising adsorbed gas, adsorbed oil, increases reserves, increase yield simultaneously.The clean fracturing liquid CFs that dissolves can also realize developing hot dry rock heat energy power-generating at earth any place.By injecting clean dissolving fracturing liquid CFs, building, expanding nanoporous seam, improving adsorbed gas, adsorbed oil desorption rate, realize the suitability for industrialized production of adsorbed gas, adsorbed oil.
Novelty:
The clean fracturing liquid CFs that dissolves builds, links up, expands nanoporous seam, improves based on desorption rate.Seepage flow petroleum engineering based on seepage flow are changed into the desorb petroleum engineering based on desorb by clean dissolving fracturing liquid CFs.
The clean fracturing liquid CFs that dissolves belongs to international innovation, reaches the international leading level.
The clean fracturing liquid CFs that dissolves is inventor's wisdom nanometer pressure break, serial first invention of inventing of wisdom nanometer oil recovery.
Practicality:
There is huge thick super dense rock earth any place underground, and super dense rock has adsorbed gas.A large amount of adsorbed gas, adsorbed oil is had in hyper-tight sandstone hydrocarbon-bearing pool, super tight carbonate oil gas pool.A large amount of adsorbed gas, adsorbed oil is still had in the dense matrix of the existing Prevent formation damage exploited.Exploitation hot dry rock heat energy and underground adsorbed gas, adsorbed oil, clean dissolving fracturing liquid CFs demand is large, market large, required time has persistence.Economic benefit, the social benefit of clean dissolving fracturing liquid CFs are all difficult to the appraisal.The first, the clean fracturing liquid CFs that dissolves can make the from all parts of the world underground energy that enriches industrialization exploit, and energy war can gradually reduce, and the disaster of energy war also can gradually reduce.The second, the energy of China completely can self-sufficiency through productive labour fast, and break through and blocks the world of CNPC, the Chinese speed reformed can walk quickening greatly.3rd, the exploitation of adsorbed gas, adsorbed oil not only can solve a large amount of employment, more importantly ensures the energy demand that national all trades and professions grow at top speed, and is that country creates a large amount of income.
The clean fracturing liquid CFs that dissolves has practicality widely, can organize production in enormous quantities.
Note: basement rock refers to the Minerals And Rocks of reservoir rock skeleton.
Characteristic:
For different rocks and cementing matter, charges, according to clean general principle and the general objective of dissolving fracturing liquid CFs of preparation, select different solvents and composition, more effectively fall resistance pore-creating and make seam.The advantage of 1% clean dissolving fracturing liquid CFs after truck-mounted blender, liquid distributing vehicle or high-duty pump circulate 20 minutes:
1. the clean fracturing liquid CFs that dissolves is without the cementing matter in the seam of acid dissolve hole and slotted wall face, hole, builds, links up, expands nanoporous seam.
2. pair kaolinic solubleness is greater than 2%, the solubleness of sodium bentonite is greater than 2%, illitic solubleness is greater than 2%, the solubleness of chlorite is greater than 2%, the solubleness of quartz is greater than 2%, the solubleness of calcite is greater than 2%, the solubleness of rhombspar is greater than 2%, and the solubleness of feldspar is greater than 2%, and the solubleness of conglomerate is greater than 2%, the solubleness of sandstone is greater than 2%, the solubleness of siltstone is greater than 2%, and the solubleness of Sandy Silt is greater than 2%, and the solubleness of coal dust is greater than 2%,. the solubleness of grouan is greater than 2% ...
3. the anti-dilative 70% ~ 200% of pair sodium bentonite.
4. carry out rock core displacement resistance-reducing yield: 15% ~ 70%.Rate of permeation increases by 20% ~ 200%.Permeability loss rate is negative value.
5. water sensitive index is negative value, and water sensitive index-0.01 ~-10 is suitable for strong retraction reservoir.
6. make pressing crack construction parting pressure decline 10% ~ 40%, Fracturing Pressure declines 20% ~ 50%, average operation pressure decline 8MPa ~ 15MPa.
7. leakoff coefficent is greater than 1m/min
1/2.
8.PH：5～7。
9. this clean fracturing liquid CFs that dissolves is easy to dissolution in low temperature.According to the weather of construction ground, the clean temperature of zero pour lower than construction ground of dissolving fracturing liquid CFs can be prepared.
10. meet environmental requirement.
The clean fracturing liquid CFs that dissolves may be used for coal bed gas well, and hyper-tight sandstone, shale oil air water, grouan, carbonatite, mud stone, Sandy Silt oil gas water well, as table 1.
Clean model and the feature of dissolving fracturing liquid CFs of table 1
| Clean dissolving fracturing liquid CFs | Model | Feature |
| Coal petrography is clean dissolves fracturing liquid | CFsco | Cementing matter in emphasis dissolving coal dust, hole seam and charges |
| Sandstone is clean dissolves fracturing liquid | CFssa | Cementing matter in emphasis dissolving feldspar, sandstone, hole seam and charges |
| Shale is clean dissolves fracturing liquid | CFssh | Cementing matter in emphasis dissolving shale, hole seam and charges |
| Grouan is clean dissolves fracturing liquid | CFsgr | Cementing matter in emphasis dissolving grouan, hole seam and charges |
| Carbonatite is clean dissolves fracturing liquid | CFsca | Cementing matter in emphasis dissolved carbon Carbonate Rocks, hole seam and charges |
| Mud stone is clean dissolves fracturing liquid | CFsmu | Cementing matter in emphasis dissolving mud stone, hole seam and charges |
| Sandy Silt is clean dissolves fracturing liquid | CFssm | Cementing matter in emphasis dissolving Sandy Silt, hole seam and charges |
Example 1. the invention provides a kind of coal seam clean dissolving fracturing liquid CFs (model VCFsco) of dissolving coal petrography and hole seam cementing matter, its advantage is that coal petrography dissolution rate is maximum, parting pressure decline in coal seam is maximum, coal bed fracturing operation pressure declines maximum, is adapted to the preposition pressure break of coal bed gas well.
The clean fracturing liquid CFsco that dissolves in 1% coal seam is through truck-mounted blender, the performance that liquid distributing vehicle or high-duty pump circulate 20 minutes is as follows: the dissolution rate of coal dust is greater than 1%, kaolinic dissolution rate is greater than 1%, the dissolution rate of montmorillonite is greater than 1.5%, illitic dissolution rate is greater than 0.5%, the dissolution rate of chlorite is greater than 0.5%, the dissolution rate of quartz is greater than 1%, the indoor displacement pressure resistance-reducing yield 20% ~ 70% of coal rock core, coal petrography nanoporous seam amplification degree 10% ~ 100%, Permeability Oe Coal And Porous Rock And Fractured Rock increment rate 100% ~ 300%, coal bed gas well parting pressure reduces by 8% ~ 20%, coal bed gas well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, coal petrography water sensitive index-0.1 ~-10.
Example 2. the invention provides a kind of sandstone clean dissolving fracturing liquid CFs (model VCFssa) dissolving sandstone and hole seam cementing matter, its advantage is that sandstone dissolution rate is maximum, the decline of sandstone reservoir parting pressure is maximum, sandstone reservoir Fracturing Pressure declines maximum, is adapted to the preposition pressure break of sandstone oil gas water well.
The clean fracturing liquid CFssa that dissolves of 1% sandstone is through truck-mounted blender, the performance that liquid distributing vehicle or high-duty pump circulate 20 minutes is as follows: sandstone dissolution rate is greater than 2%, kaolinic dissolution rate is greater than 1%, the dissolution rate of montmorillonite is greater than 1.5%, illitic dissolution rate is greater than 0.5%, the dissolution rate of chlorite is greater than 0.5%, the dissolution rate of quartz is greater than 1%, the dissolution rate of feldspar is greater than 1%, the indoor displacement pressure resistance-reducing yield 20% ~ 70% of Sandstone Cores, sandstone nanoporous seam amplification degree 10% ~ 100%, Permeability of Sandstone increment rate 100% ~ 300%, sandstone oil gas water well parting pressure reduces by 8% ~ 20%, sandstone oil gas water well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, sandstone water sensitive index-0.1 ~-10.
Example 3. the invention provides a kind of shale clean dissolving fracturing liquid CFs (model VCFssh) dissolving shale and hole seam cementing matter, its advantage is that shale dissolution rate is maximum, the decline of shale reservoir fracture pressure is maximum, shale reservoir fracturing operation pressure declines maximum, is adapted to the preposition pressure break of shale oil gas-water well.
The clean fracturing liquid CFssh that dissolves of 1% shale is through truck-mounted blender, the performance that liquid distributing vehicle or high-duty pump circulate 20 minutes is as follows: shale dissolution rate is greater than 1.5%, kaolinic dissolution rate is greater than 1%, the dissolution rate of montmorillonite is greater than 1.5%, illitic dissolution rate is greater than 0.5%, the dissolution rate of chlorite is greater than 0.5%, the dissolution rate of quartz is greater than 0.5%, the indoor displacement pressure resistance-reducing yield 20% ~ 70% of shale core, shale nanoporous seam amplification degree 10% ~ 100%, shale rate of permeation increment rate 100% ~ 300%, shale oil gas-water well parting pressure reduces by 8% ~ 20%, shale oil gas-water well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, shale water sensitive index-0.1 ~-10.
Example 4. the invention provides the carbonatite clean dissolving fracturing liquid CFs (model VCFsca) of a kind of dissolved carbon Carbonate Rocks and hole seam cementing matter, its advantage is that dissolution of carbonate rock rate is maximum, the decline of carbonate reservoir parting pressure is maximum, carbonate reservoir Fracturing Pressure declines maximum, is adapted to the preposition pressure break of carbonatite oil gas water well.
The clean fracturing liquid CFsca that dissolves of 1% carbonatite is through truck-mounted blender, the performance that liquid distributing vehicle or high-duty pump circulate 20 minutes is as follows: dissolution of carbonate rock rate is greater than 1%, kaolinic dissolution rate is greater than 1%, the dissolution rate of montmorillonite is greater than 1.5%, illitic dissolution rate is greater than 0.5%, the dissolution rate of chlorite is greater than 0.5%, the dissolution rate of quartz is greater than 0.5%, displacement pressure resistance-reducing yield 20% ~ 70% in carbonatite core chamber, carbonatite nanoporous seam amplification degree 10% ~ 100%, carbonatite rate of permeation increment rate 100% ~ 300%, carbonatite oil gas water well parting pressure reduces by 8% ~ 20%, carbonatite oil gas water well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, carbonatite water sensitive index-0.1 ~-10.
Example 5. the invention provides a kind of grouan clean dissolving fracturing liquid CFs (model VCFsgr) dissolving grouan and hole seam cementing matter, its advantage is that grouan dissolution rate is maximum, the decline of Granite Reservoir parting pressure is maximum, Granite Reservoir Fracturing Pressure declines maximum, is adapted to the preposition pressure break of grouan oil gas water well.
1% grouan cleans that to dissolve the performance that fracturing liquid CFsgr circulates 20 minutes through truck-mounted blender, liquid distributing vehicle or high-duty pump as follows: grouan dissolution rate is greater than 1%, displacement pressure resistance-reducing yield 20% ~ 70% in grouan core chamber, grouan nanoporous seam amplification degree 10% ~ 100%, grouan rate of permeation increment rate 100% ~ 300%, grouan well parting pressure reduces by 8% ~ 20%, grouan well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, grouan water sensitive index-0.1 ~-10.
Example 6. the invention provides a kind of mud stone clean dissolving fracturing liquid CFs (model VCFsmu) dissolving mud stone and hole seam cementing matter, its advantage is that mud stone dissolution rate is maximum, the decline of Mudstone Reservoirs parting pressure is maximum, Mudstone Reservoirs Fracturing Pressure declines maximum, is adapted to the preposition pressure break of mud stone oil gas water well.
The clean fracturing liquid CFsmu that dissolves of 1% mud stone is through truck-mounted blender, the performance that liquid distributing vehicle or high-duty pump circulate 20 minutes is as follows: mud stone dissolution rate is greater than 1%, kaolinic dissolution rate is greater than 1%, the dissolution rate of montmorillonite is greater than 1.5%, illitic dissolution rate is greater than 0.5%, the dissolution rate of chlorite is greater than 0.5%, the dissolution rate of quartz is greater than 0.5%, displacement pressure resistance-reducing yield 20% ~ 70% in mud stone core chamber, mud stone nanoporous seam amplification degree 10% ~ 100%, mud stone rate of permeation increment rate 100% ~ 300%, mud stone well parting pressure reduces by 8% ~ 20%, mud stone well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, mud stone water sensitive index-0.1 ~-10.
Example 7. the invention provides a kind of Sandy Silt clean dissolving fracturing liquid CFs (model VCFssm) dissolving Sandy Silt and hole seam cementing matter, its advantage is that Sandy Silt dissolution rate is maximum, the decline of Sandy Silt reservoir fracture pressure is maximum, Sandy Silt reservoir fracturing operation pressure declines maximum, is adapted to the preposition pressure break of Sandy Silt oil gas water well.
1% Sandy Silt cleans that to dissolve the performance that fracturing liquid CFssm circulates 20 minutes through truck-mounted blender, liquid distributing vehicle or high-duty pump as follows: Sandy Silt dissolution rate is greater than 1%, displacement pressure resistance-reducing yield 20% ~ 70% in Sandy Silt core chamber, Sandy Silt nanoporous seam amplification degree 10% ~ 100%, Sandy Silt rate of permeation increment rate 100% ~ 300%, Sandy Silt well parting pressure reduces by 8% ~ 20%, Sandy Silt well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, Sandy Silt water sensitive index-0.1 ~-10.
Example 8. the invention provides a kind of other rocks clean dissolving fracturing liquid CFs dissolving other rocks and hole seam cementing matter, its advantage is that other rock dissolution rates are maximum, the decline of other rock formation parting pressures is maximum, other rock formation Fracturing Pressures decline maximum, are adapted to the preposition pressure break of other rock oil gas water wells.
1% other rocks clean that to dissolve the performance that fracturing liquid CFs circulates 20 minutes through truck-mounted blender, liquid distributing vehicle or high-duty pump as follows: other rock dissolution rates are greater than 2%, displacement pressure resistance-reducing yield 20% ~ 70% in other rock core chamber, other rock nanoporouss seam amplification degree 10% ~ 100%, other rock permeability increment rates 100% ~ 300%, other rock well parting pressures reduce by 8% ~ 20%, other rock well Fracturing Pressures reduce by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, other rock water sensitive indexes-0.1 ~-10.
Claims (9)
1. dissolve the clean dissolving fracturing liquid CFs compound method of petrographic formation nanoporous seam, it is characterized in that its principle is at a distance without cementing matter, charges and wall in acid dissolve rock pore seam, first nanoporous seam is built, on the basis of building nanoporous seam, build micron openings seam, millimeter opening seam, form multistage volume network hole seam.The clean basic ingredients (be called for short to clean and dissolve fracturing liquid CFs base-material) dissolving fracturing liquid CFs of preparation has: the relative molecular masses such as hydrocarbon, halohydrocarbon, alcohol, phenol, ether, ketone, ester, nitrogenous compound, sulfocompound, polyfunctional group, tensio-active agent are less than 500 and solvent soluble in water.It is characterized in that system component and consumption are according to clean general principle and the general objective of dissolving fracturing liquid CFs of preparation, with lithological composition, formation temperature, reservoir pressure, execution conditions change, have relativity.It is characterized in that the performance of filling a prescription has: the rock such as dissolve clays mineral (kaolinite, sodium bentonite, illite, chlorite), quartz, calcite, rhombspar, feldspar, conglomerate, sandstone, siltstone, Sandy Silt, coal dust, grouan.
2. according to compound method according to claim 1, it is characterized in that preparing the clean general principle dissolving fracturing liquid CFs be by rock mineral composition and base-material water-soluble based on, maximum with rock dissolution rate, solvent level of residue is minimum, rock breakdown pressure and Fracturing Pressure decline maximum dose are clean dissolves fracturing liquid CFs.The 1% clean fracturing liquid CFs that dissolves is through truck-mounted blender, after liquid distributing vehicle or high-duty pump circulate 20 minutes, the catalogue of preparation is designated as: rock dissolution rate is greater than 1%, solvent level of residue 0mg/L ~ 200mg/L, the expansion 10% ~ 100% of nanoporous seam, rate of permeation increases by 100% ~ 300%, parting pressure reduces by 8% ~ 20%, Fracturing Pressure reduces by 10% ~ 60%, displacement pressure resistance-reducing yield 10% ~ 70%, anti-dilative (100% ~ 200%), water sensitive index-0.1 ~-10, acid-sensitive index-0.1 ~-10, Jia Min resistance, reduce water seal resistance, hollow billet resistance reduces by 2% ~ 15%.
Note:
Jia Min resistance reduced rate=(oily expelling water inlet pressure-1% dissolves fracturing liquid displacement of reservoir oil inlet pressure)/oily expelling water inlet pressure * 100%.
The pressure * 100% of water lock resistance reduced rate=(pressure-1% of local water displacement dissolves the pressure of fracturing liquid displacement)/local water displacement.
Hollow billet resistance reduced rate=(capillary force P of local water displacement
50the capillary force P of-1% dissolving fracturing liquid displacement
50the capillary force P of)/local water displacement
50* 100%.
Wetting phase phase relative permeability
Non-wetted phase phase relative permeability
Capillary pressure
Water drive method can be adopted, calculate capillary pressure with formula 1-4.
3. according to described in claim 1-2, it is characterized in that the clean concrete compound method of fracturing liquid CFs of dissolving is: the mineralogical composition first measuring rock, based on clean dissolving fracturing liquid CFs base-material, fundamental principle is to the maximum with rock dissolution rate, according to clean general principle and the general objective of dissolving fracturing liquid CFs of preparation, select base-material solvent, with these solvent loads for unknown number, list system of equations with general objective optimum, obtain the consumption of often kind of solvent in base-material by the method that linear algebra solves system of linear equations.Associated solvent consumption also needs to consider solvent source and economic dispatch factor.
4., according to described in claim 1-3, it is characterized in that the clean fracturing liquid CFs that dissolves is easy to build nanoporous seam, improve desorption rate, make adsorbed gas, adsorbed oil energy industrialization exploitation.The clean base-material dissolving fracturing liquid CFs is soluble in water and the relative molecular mass anacidity solvent that is less than 500, water-soluble through truck-mounted blender, liquid distributing vehicle or high-duty pump cycle balance, molecular diameter 0.08nm ~ 0.27nm, be easy to enter clay mineral 6, surface Sauerstoffatom and surround empty suppression ion-exchange in diameter 0.28nm, link up nanoporous seam; And the hole seam being easy to enter basement rock 0.38nm suppresses ion-exchange, dissolves nanoporous slotted wall face rock, expands nanoporous seam simultaneously.The clean fracturing liquid CFs that dissolves both had been easy to dissolve construction, had linked up, had expanded nano grade pore seam; Can link up again, expand micron order, millimeter grade hole seam; Build the volume map cracking of nano level, micron order, grade, centimetre-sized, improve desorption rate, velocity of diffusion and seepage velocity simultaneously, make adsorbed gas, adsorbed oil energy industrialization exploitation.
5., according to described in claim 1-4, it is characterized in that clean fracturing liquid CFs base-material source of dissolving has two kinds.The first source is the fertile ready-made raw material of factory.The second source utilizes formation temperature, pressure, organism, inorganics, add appropriate raw material and catalyzer, using stratum as wisdom Reaktionsofen, generate the clean dissolving fracturing liquid CFs that can dissolve petrographic formation, communication, expansion nano level, micron order, millimeter grade hole seam at response of stratum.The clean fracturing liquid CFs that dissolves makes dissolving raffinate level of residue reach minimum by complexing agent, dirt dispersion agent.
6. according to described in claim 1-5, it is characterized in that the clean fracturing liquid CFs that dissolves is specially adapted to super dense rock, super surpressure stress stratum, high parting pressure stratafrac, be easy to dissolve construction on super dense rock, super surpressure stress stratum, high parting pressure stratum, link up, expand nano grade pore seam, rock stress is made to discharge 10% ~ 70%, rate of permeation improves 50% ~ 400%, parting pressure declines 8% ~ 20%, and Fracturing Pressure reduces by 8% ~ 20%.
7. according to described in claim 1-6, it is characterized in that the clean fracturing liquid CFs that dissolves is specially adapted to strong retraction stratafrac, be adapted to the strong retraction stratum such as shale, mud stone, Sandy Silt and swelling property smectite content height especially, anti-dilative high (70% ~ 200%), the water sensitive index on strong retraction stratum is made to become negative value, water sensitive index-0.01 ~-10.
8. according to described in claim 1-7, it is characterized in that the clean fracturing liquid CFs that dissolves expanding nanoporous seam, wettability change, enhancing oilness by dissolving, strengthening infiltration, reducing surface tension, reduce Jia Min resistance, reduce water seal resistance, hollow billet resistance declines 8% ~ 20%.Clean dissolving fracturing liquid CFs is specially adapted to the pressure break on high hollow billet resistance stratum.
9. according to described in claim 1-8, it is characterized in that preparing the coal petrography clean dissolving fracturing liquid CFsco being applicable to coal bed gas well pressure break, be applicable to the sandstone clean dissolving fracturing liquid CFssa of sandstone oil gas water well pressure break, be applicable to the shale clean dissolving fracturing liquid CFssh of shale oil gas-water well pressure break, be applicable to the carbonatite clean dissolving fracturing liquid CFsca of carbonatite oil gas water well pressure break, be applicable to the grouan clean dissolving fracturing liquid CFsgr of granitic formation oil gas water well pressure break, be applicable to the mud stone clean dissolving fracturing liquid CFsmu of mudstone stratum oil gas water well pressure break, be applicable to the Sandy Silt clean dissolving fracturing liquid CFssm of Sandy Silt hydrocarbon stratum well fracturing, and be applicable to the clean dissolving fracturing liquid of other lithostratigraphy oil gas water well pressure breaks.
Coal petrography cleans that the feature of dissolving fracturing liquid CFsco is that coal dust dissolution rate is maximum, coal seam parting pressure and Fracturing Pressure decline maximum.The clean fracturing liquid CFsco performance of dissolving in 1% coal seam is as follows: coal dust dissolution rate is greater than 1%, the indoor displacement pressure resistance-reducing yield 20% ~ 70% of coal rock core, coal petrography nanoporous seam amplification degree 10% ~ 100%, Permeability Oe Coal And Porous Rock And Fractured Rock increment rate 100% ~ 300%, coal bed gas well parting pressure reduces by 8% ~ 20%, coal bed gas well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, coal petrography water sensitive index-0.1 ~-10.
It is that sandstone dissolution rate is maximum that sandstone cleans the feature of dissolving fracturing liquid CFssa, and sandstone reservoir parting pressure sandstone Fracturing Pressure declines maximum.The clean fracturing liquid CFssa performance of dissolving of 1% sandstone is as follows: sandstone dissolution rate is greater than 2%, the indoor displacement pressure resistance-reducing yield 20% ~ 70% of Sandstone Cores, sandstone nanoporous seam amplification degree 10% ~ 100%, Permeability of Sandstone increment rate 100% ~ 300%, sandstone oil gas water well parting pressure reduces by 8% ~ 20%, sandstone oil gas water well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, sandstone water sensitive index-0.1 ~-10.
It is that shale dissolution rate is maximum that shale cleans the feature of dissolving fracturing liquid CFssh, and shale reservoir fracture pressure and Fracturing Pressure decline maximum.The clean fracturing liquid CFssh performance of dissolving of 1% shale is as follows: shale dissolution rate is greater than 1.5%, the indoor displacement pressure resistance-reducing yield 20% ~ 70% of shale core, shale nanoporous seam amplification degree 10% ~ 100%, shale rate of permeation increment rate 100% ~ 300%, shale oil gas-water well parting pressure reduces by 8% ~ 20%, shale oil gas-water well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, shale water sensitive index-0.1 ~-10.
It is that dissolution of carbonate rock rate is maximum that carbonatite cleans the feature of dissolving fracturing liquid CFsca, and carbonate reservoir parting pressure and Fracturing Pressure decline maximum.The clean fracturing liquid CFsca performance of dissolving of 1% carbonatite is as follows: dissolution of carbonate rock rate is greater than 2%, displacement pressure resistance-reducing yield 20% ~ 70% in carbonatite core chamber, carbonatite nanoporous seam amplification degree 10% ~ 100%, carbonatite rate of permeation increment rate 100% ~ 300%, carbonatite oil gas water well parting pressure reduces by 8% ~ 20%, carbonatite oil gas water well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, carbonatite water sensitive index-0.1 ~-10.
It is that grouan dissolution rate is maximum that grouan cleans the feature of dissolving fracturing liquid CFsgr, and sial parting pressure and Fracturing Pressure decline maximum.The clean fracturing liquid CFsgr performance of dissolving of 1% grouan is as follows: grouan dissolution rate is greater than 1%, displacement pressure resistance-reducing yield 20% ~ 70% in grouan core chamber, grouan nanoporous seam amplification degree 10% ~ 100%, grouan rate of permeation increment rate 100% ~ 300%, grouan well parting pressure reduces by 8% ~ 20%, grouan well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, grouan water sensitive index-0.1 ~-10.
It is that mud stone dissolution rate is maximum that mud stone cleans the feature of dissolving fracturing liquid CFsmu, and shale layer parting pressure and Fracturing Pressure decline maximum.The clean fracturing liquid CFsmu performance of dissolving of 1% mud stone is as follows: mud stone dissolution rate is greater than 1%, displacement pressure resistance-reducing yield 20% ~ 70% in mud stone core chamber, mud stone nanoporous seam amplification degree 10% ~ 100%, mud stone rate of permeation increment rate 100% ~ 300%, mud stone well parting pressure reduces by 8% ~ 20%, mud stone well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, mud stone water sensitive index-0.1 ~-10.
It is that Sandy Silt dissolution rate is maximum that Sandy Silt cleans the feature of dissolving fracturing liquid CFssm, and Sandy Silt Layer parting pressure and Fracturing Pressure decline maximum.The clean fracturing liquid CFssm performance of dissolving of 1% Sandy Silt is as follows: Sandy Silt dissolution rate is greater than 1%, displacement pressure resistance-reducing yield 20% ~ 70% in Sandy Silt core chamber, Sandy Silt nanoporous seam amplification degree 10% ~ 100%, Sandy Silt rate of permeation increment rate 100% ~ 300%, Sandy Silt well parting pressure reduces by 8% ~ 20%, Sandy Silt well Fracturing Pressure reduces by 8% ~ 20%, sodium bentonite anti-dilative 100% ~ 200%, Sandy Silt water sensitive index-0.1 ~-10.
Based on mineralogical composition, rock breakdown pressure maximum with rock dissolution rate and Fracturing Pressure decline and are general principle to the maximum, can prepare the clean dissolving fracturing liquid CFs being suitable for various rock.
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