CN1277897C - Deep compact gas pool fracturing liquid - Google Patents
Deep compact gas pool fracturing liquid Download PDFInfo
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- CN1277897C CN1277897C CN 200410043878 CN200410043878A CN1277897C CN 1277897 C CN1277897 C CN 1277897C CN 200410043878 CN200410043878 CN 200410043878 CN 200410043878 A CN200410043878 A CN 200410043878A CN 1277897 C CN1277897 C CN 1277897C
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Abstract
The present invention relates to deep compact gas pool fracturing fluid, particularly to the fracturing fluid which is applied to the deep compact gas pool massive fracturing. The present invention is formed by mixing following components of 0.2 to 1.0 wt% of thickening agents, 0.05 to 0.2 wt% of surface active agents, 0.1 to 1 wt% of clay stabilizers, 0.01 to 0.2 wt% of germicidal agents, 0.05 to 0.2 wt% of buffering agents, 0.1 to 0.5 wt% of temperature stability agents, 0.1 to 0.5 wt% of high temperature cross linking agents, 0.1 to 0.5 wt% of cross linking control agent, 0.001 to 0.01 wt% of gel breakers, 0.0001 to 0.001 wt% of catalysts for the gel breaker, 0.01 to 0.1 wt% of defoaming agents, 1 to 5 wt% of filtration loss agents, and water as the rest. The present invention has the advantages of high temperature resistance, good shearing resistance performance and gel broken effect, low friction of the fracturing fluid, high efficiency of the fracturing fluid and low matrix filtration loss.
Description
Technical field:
The present invention relates to a kind of fracturing liquid, be specifically related to a kind of fracturing liquid that is applied in the deep layer tight gas reservoir big-frac treatment.
Background technology:
In recent years, fast development along with world economy, the development and utilization of natural gas source is subjected to extensive concern, because its distinctive living hydrocarbon and one-tenth are hidden mechanism, worldwide, natural gas source is mainly composed and is stored in the deep dense formation, such reservoir burial history is remote, and depth of burial is big, and the rerum natura condition is poor, the nature production capacity is low, only carries out the fracturing yield increasing transformation and just can reach ideal commercial reserves and extraction value.Fracturing liquid is the working fluid of pressing crack construction, is used for transmitting energy in construction, makes the reservoir open fracture, and carries propping agent along the crack, thereby forms a high flow conductivity passage in reservoir, is beneficial to oil/gas and flows to the shaft bottom from the stratum at a distance, reaches the volume increase purpose.Deep layer tight gas reservoir reservoir geology complicated condition, it is big that difficulty is implemented in the pressure break measure, in the construction process, fracturing liquid otherwise cracked ends are subjected to over-drastic to shear and be in the reservoir hot environment for a long time, under this condition, to be difficult to keep width generation capacity stable and that continue if fracturing liquid can not have good temperature stability and shear stability, and because degraded too early and leak-off lose the sand ability of hanging.Simultaneously,, crosslinkedly delay performance as not controlling well, reduce the construction frictional resistance, will cause the failure of constructing because deep layer tight gas reservoir pressing crack construction scale is big, pressing crack construction discharge capacity height, fracturing liquid be along journey frictional resistance height.Therefore, in deep layer tight gas reservoir big-frac treatment, the fracturing liquid performance is one of decision construction key of success factor.Pressure break is the effective means that present reservoir stimulation is transformed, in order further to excavate natural gas reserves and to improve construction of natural gas fields benefit, in recent years, correlation technique research and test have all been actively developed both at home and abroad, but the construction success ratio is still lower, except because the arduousness of the complicacy of deep gas bearing reservoir and geological knowledge, the fracturing working fluid research that mechanism and adaptation are split, extended in opening of fracturing fracture also exists to be limited to.
Summary of the invention:
The objective of the invention is to increase production transformation and propose a kind of deep layer tight gas reservoir fracturing liquid at the deep layer tight gas reservoir, this fracturing liquid not only has good rheology and hydrodynamics, and can satisfy the special requirement of Crack Control.Fracturing liquid of the present invention is mixed by following component in percentage by weight: thickening material 0.2～1.0%, tensio-active agent 0.05～0.2%, clay stabilizer 0.1～1%, sterilant 0.01～0.2%, buffer reagent 0.05～0.2%, temperature stabilising agent 0.1～0.5%, high-temperature cross-linking agent 0.1～0.5%, crosslinked control agent 0.1～0.5%, gel breaker 0.001～0.01%, broken glue catalyzer 0.0001～0.001%, defoamer 0.01～0.1%, fluid loss agent 1～5%, surplus is a water.The present invention has following characteristics: (1) high thermal resistance: because the macromolecular heat resistance of fracturing liquid reticulated structure mainly is subjected to two controlling factors, the one, the stability of main polymer chain: studies show that by experiment, water-soluble polymers (vegetable jelly) molecular backbone chain is degraded rapidly when temperature reaches 177 ℃, the resistance to extreme temperature that is the vegetable jelly molecule is 177 ℃, according to these characteristics, by adopting the free oxygen in the temperature stabilising agent removal liquid, reduce the thermostability that its katalysis to thermal destruction improves the viscosifying agent molecule, for system temperature stability provides the basis; The 2nd, the stability of crosslinked group: fracturing liquid system of the present invention adopts temperature stabilising agent and free polymer readical reaction, improves the affinity of linking agent metal ion and polymkeric substance hydroxy functional group, and fracturing liquid is stablized in hot environment.(2) shear resistant: the linking agent that the present invention adopts is a temperature dependent form linking agent, and it makes crosslinked kinetic reaction become temperature controlled processes, at normal temperatures, rate of crosslinking is slow, reduce ground machine and shear the fracturing liquid structural damage, behind the arrival shaft bottom, temperature raises, rate of crosslinking is accelerated, in the fracturing liquid migration process, viscosity raises gradually, and along with the nearly well phase temperature in crack reduces gradually, the constantly reach of the high point of fracturing liquid tackify progressively reaches the tackify peak.(3) optimize broken glue: adopt method for numerical simulation, calculate different construction stage crack temperature variation and each several part fracturing liquid (being the fracturing liquid of different batches) and be exposed to the time under the original temperature of stratum, and in conjunction with shop experiment, thereby determine different steps gel breaker consumption, after construction finishes, along with formation temperature raises, fracturing liquid is along the progressively broken glue of fracture orientation, thus the broken glue effect that the fracturing liquid acquisition is expected.(4) low frictional resistance: fracturing liquid is as power rate fluid, increase along with its non newtonian degree, the Reynolds number of laminar flow scope is big more, this fracturing liquid system is by optimizing crosslinked control agent consumption, the rheological of control fracturing liquid in the pipeline course of conveying, improve the kindliness of fracturing liquid tridimensional network, reduce the fracturing liquid frictional resistance.(5) control leak-off: the deep gas layer burial history is remote, experienced complicated tectonic movement, pilosity is given birth to very abundant microfracture and hole, thereby cause the rapid leak-off of fracturing liquid in the fracture propagation process, construction failure, leak-off control techniques comprise the microfracture that intersects with it in control reservoir matrix leak-off, the nearly well multiple cracking expansion of control and the control fracture propagation process; In the research of leak-off control techniques, by the pressure break simulation, analyze fracturing fluid leak mechanism, adopt corresponding measure: the one, suitable fluid loss agent is determined in screening and assessment research, reduces the matrix leak-off; The 2nd, inject the high viscosity fracturing fluid slug, the nearly well multiple cracking of shutoff improves net pressure in the major fracture, and major fracture is effectively expanded; The 3rd, adopt the solid phase particles fluid loss agent, the microfracture that runs in the artificial seam extend process of shutoff by above three technology, improves fluid efficiency.That the present invention has is high temperature resistant, anti-shear performance good, broken glue is effective, reduce the fracturing liquid frictional resistance, improve fluid efficiency and reduce the advantage of matrix leak-off.
Embodiment:
Embodiment one: the fracturing liquid of present embodiment is mixed by following component in percentage by weight: thickening material 0.2～1.0%, tensio-active agent 0.05～0.2%, clay stabilizer 0.1～1%, sterilant 0.01～0.2%, buffer reagent 0.05～0.2%, temperature stabilising agent 0.1～0.5%, high-temperature cross-linking agent 0.1～0.5%, crosslinked control agent 0.1～0.5%, gel breaker 0.001～0.01%, broken glue catalyzer 0.0001～0.001%, defoamer 0.01～0.15%, fluid loss agent 1～5%, surplus is a water.Described thickening material is hydroxypropyl modification guanidine glue, guanidine that glue, hydroxypropyl modification guanidine glue, carboxy-methyl hydroxy propyl modification guanidine glue, fenugreek gum, xanthan gum or carboxymethyl cellulose; Described tensio-active agent is fluorochemical surfactant or anion surfactant; Described clay stabilizer is small molecular weight clay stabilizer or KCl; Described sterilant is isothiazoline, tensio-active agent and glutaraldehyde compound; Described buffer reagent is the organic acids and base buffer reagent; Described temperature stabilising agent is Sulfothiorine and low mass molecule alcohol compound; Described high-temperature cross-linking agent is a composite transition metal salt high-temperature cross-linking agent; Described crosslinked control agent is the polyol crosslink control agent; Described gel breaker is the oxidized form gel breaker; Described broken glue catalyzer is a sulphite; Described defoamer is a silicone antifoam agent; Described fluid loss agent is the hydro carbons fluid loss agent.
Embodiment two: the fracturing liquid of present embodiment is mixed by following component in percentage by weight: thickening material 0.3～0.5%, tensio-active agent 0.06～0.1%, clay stabilizer 0.2～0.5%, sterilant 0.02～0.1%, buffer reagent 0.06～0.12%, temperature stabilising agent 0.15～0.3%, high-temperature cross-linking agent 0.15～0.25%, crosslinked control agent 0.2～0.3%, gel breaker 0.002～0.05%, broken glue catalyzer 0.0002～0.0005%, defoamer 0.02～0.05%, fluid loss agent 1.5～3%, surplus is a water.
Embodiment three: the fracturing liquid of present embodiment is mixed by following component in percentage by weight: thickening material 0.6～0.9%, tensio-active agent 0.12～0.18%, clay stabilizer 0.6～0.9%, sterilant 0.12～0.18%, buffer reagent 0.15～0.19%, temperature stabilising agent 0.32～0.48%, high-temperature cross-linking agent 0.35～0.45%, crosslinked control agent 0.35～0.4%, gel breaker 0.06～0.09%, broken glue catalyzer 0.0006～0.0009%, defoamer 0.06～0.09%, fluid loss agent 3.5～4.5%, surplus is a water.
Embodiment four: the fracturing liquid of present embodiment is mixed by following component in percentage by weight: thickening material 0.4%, tensio-active agent 0.08%, clay stabilizer 0.3%, sterilant 0.025%, buffer reagent 0.07%, temperature stabilising agent 0.2%, high-temperature cross-linking agent 0.18%, crosslinked control agent 0.22%, gel breaker 0.003%, broken glue catalyzer 0.0004%, defoamer 0.03%, fluid loss agent 2%, surplus are water.
Embodiment five: the fracturing liquid of present embodiment is mixed by following component in percentage by weight: thickening material 0.8%, tensio-active agent 0.16%, clay stabilizer 0.8%, sterilant 0.17%, buffer reagent 0.18%, temperature stabilising agent 0.45%, high-temperature cross-linking agent 0.4%, crosslinked control agent 0.38%, gel breaker 0.08%, broken glue catalyzer 0.0008%, defoamer 0.08%, fluid loss agent 4.2%, surplus are water.
Embodiment six: the fracturing liquid of present embodiment is mixed by following component in percentage by weight: thickening material 0.62%, tensio-active agent 0.123%, clay stabilizer 0.42%, sterilant 0.10%, buffer reagent 0.156%, temperature stabilising agent 0.27%, high-temperature cross-linking agent 0.285%, crosslinked control agent 0.152%, gel breaker 0.003%, broken glue catalyzer 0.0002%, defoamer 0.048%, fluid loss agent 3%, surplus are water.
Embodiment seven: the fracturing liquid CHTG of present embodiment is mixed by following component in percentage by weight: hydroxypropyl modification guanidine glue 0.62%, anion surfactant 0.123%, small molecular weight quaternary ammonium salt clay stabilizer 0.42%, isothiazoline, tensio-active agent and glutaraldehyde composite bactericide 0.10%, fumaric acid and yellow soda ash mixing buffer reagent 0.156%, the composite temperature stabilising agent 0.27% of Sulfothiorine and low mass molecule alcohol, transition metal salt high-temperature cross-linking agent 0.285%, polyol crosslink control agent 0.152%, oxidized form parcel gel breaker 0.003%, sulphite breaks glue catalyzer 0.0002%, silicone antifoam agent 0.048%, hydro carbons fluid loss agent 3%, surplus is a water.Below the of the fracturing fluid effect of present embodiment is elaborated:
(1) the XS1 well location is domestic in Zhaozhou County of Heilongjiang Province, and full well comprises steps on Lou Ku group, battalion's city group, Shahe son group, XS1 well K1sh 234-235 layer depth 4480.0～4435.2m, about 170 ℃ of reservoir middle part temperature.Fracturing liquid at this layer ties up under 170 ℃ of conditions, shears 2.5h, and viscosity is 125.0mPa.s, has satisfied the needs of K1sh 234-235 layer construction, and its high temperature fracture liquid rheological property table 1, XS1 well high temperature fracture liquid heat resistance graphic representation are seen Fig. 1.
Table 1
| The prescription title | Shear temperature (℃) | Shear viscosity (mPas) | K` (Pa·sn) | n` | |||
| Initially | 60min | 120min | 150min | ||||
| CHTG | 170 | 266.5 | 234.1 | 176.3 | 125.2 | 0.2820 | 0.5 |
(2) XS1 well K1yc 149-150 layer is huge thick reservoir, is main force's payzone of XS1 well, reservoir thickness 253.6m, and design fracturing fracture half long 131.0m adds sand 100.0m3, and fracturing liquid 960.0m3 estimates engineering time 3h.XS1 well fracturing fluid system anti-shear performance is seen Fig. 2, as can be seen from the figure, and at 150 ℃, 170s
-1Condition down cut 4.0h, viscosity has satisfied construction requirement greater than 80mPa.s.
Claims (10)
1, deep layer tight gas reservoir fracturing liquid is characterized in that it is mixed by following component in percentage by weight: thickening material 0.2～1.0%, tensio-active agent 0.05～0.2%, clay stabilizer 0.1～1%, sterilant 0.01～0.2%, buffer reagent 0.05～0.2%, temperature stabilising agent 0.1～0.5%, high-temperature cross-linking agent 0.1～0.5%, crosslinked control agent 0.1～0.5%, gel breaker 0.001～0.01%, broken glue catalyzer 0.0001～0.001%, defoamer 0.01～0.1%, fluid loss agent 1～5%, surplus are water.
2, deep layer tight gas reservoir fracturing liquid according to claim 1 is characterized in that described thickening material is hydroxypropyl modification guanidine glue, guanidine that glue, hydroxypropyl modification guanidine glue, carboxy-methyl hydroxy propyl modification guanidine glue, fenugreek gum, xanthan gum or carboxymethyl cellulose.
3, deep layer tight gas reservoir fracturing liquid according to claim 1 is characterized in that described tensio-active agent is anion surfactant or fluorochemical surfactant; Described clay stabilizer is small molecular weight clay stabilizer or KCl.
4, deep layer tight gas reservoir fracturing liquid according to claim 1 is characterized in that described sterilant is isothiazoline, tensio-active agent and glutaraldehyde compound; Described buffer reagent is the organic acids and base buffer reagent; Described temperature stabilising agent is Sulfothiorine and low mass molecule alcohol compound.
5, deep layer tight gas reservoir fracturing liquid according to claim 1 is characterized in that described high-temperature cross-linking agent is a composite transition metal salt high-temperature cross-linking agent; Described crosslinked control agent is the polyol crosslink control agent.
6, deep layer tight gas reservoir fracturing liquid according to claim 1 is characterized in that described gel breaker is the oxidized form gel breaker; Described broken glue catalyzer is a sulphite.
7, deep layer tight gas reservoir fracturing liquid according to claim 1 is characterized in that described defoamer is a silicone antifoam agent; Described fluid loss agent is the hydro carbons fluid loss agent.
8, according to claim 1,2,3,4,5,6 or 7 described deep layer tight gas reservoir fracturing liquids is characterized in that it is mixed by following component in percentage by weight: thickening material 0.3～0.5%, tensio-active agent 0.06～0.1%, clay stabilizer 0.2～0.5%, sterilant 0.02～0.1%, buffer reagent 0.06～0.12%, temperature stabilising agent 0.15～0.3%, high-temperature cross-linking agent 0.15～0.25%, crosslinked control agent 0.2～0.3%, gel breaker 0.002～0.05%, broken glue catalyzer 0.0002～0.0005%, defoamer 0.02～0.05%, fluid loss agent 1.5～3%, surplus is a water.
9, according to claim 1,2,3,4,5,6 or 7 described deep layer tight gas reservoir fracturing liquids is characterized in that it is mixed by following component in percentage by weight: thickening material 0.6～0.9%, tensio-active agent 0.12～0.18%, clay stabilizer 0.6～0.9%, sterilant 0.12～0.18%, buffer reagent 0.15～0.19%, temperature stabilising agent 0.32～0.48%, high-temperature cross-linking agent 0.35～0.45%, crosslinked control agent 0.35～0.4%, gel breaker 0.06～0.09%, broken glue catalyzer 0.0006～0.0009%, defoamer 0.06～0.09%, fluid loss agent 3.5～4.5%, surplus is a water.
10, according to claim 1,2,3,4,5,6 or 7 described deep layer tight gas reservoir fracturing liquids, it is characterized in that it is mixed by following component in percentage by weight: thickening material 0.62%, tensio-active agent 0.123%, clay stabilizer 0.42%, sterilant 0.10%, buffer reagent 0.156%, temperature stabilising agent 0.27%, high-temperature cross-linking agent 0.285%, crosslinked control agent 0.152%, gel breaker 0.003%, broken glue catalyzer 0.0002%, defoamer 0.048%, fluid loss agent 3%, surplus are water.
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| CN 200410043878 CN1277897C (en) | 2004-09-17 | 2004-09-17 | Deep compact gas pool fracturing liquid |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633839B (en) * | 2009-08-28 | 2012-08-29 | 大庆油田有限责任公司 | 200-DEG C super-high temperature fracturing fluid |
| CN102676147B (en) * | 2012-05-16 | 2015-01-21 | 中国石油天然气股份有限公司 | Large-scale transformed low-residue fracturing fluid |
| CN102676148B (en) * | 2012-05-25 | 2013-03-13 | 西南石油大学 | High-density low-friction fracturing fluid |
| CN103215025B (en) * | 2013-05-16 | 2015-01-07 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Novel vegetable gum fracturing fluid jelly for oil well |
| CN103509543B (en) * | 2013-10-11 | 2016-04-13 | 北京国海能源技术研究院 | Reusable edible fracturing liquid and preparation method thereof |
| CN103740355A (en) * | 2014-01-08 | 2014-04-23 | 中国石油天然气股份有限公司 | High-salinity water-based modified xanthan gum fracturing fluid and preparation method thereof |
| CN104974738B (en) * | 2014-04-10 | 2019-05-31 | 中国石油化工股份有限公司 | A kind of water-base gel fracturing fluid and its application |
| CN107739602A (en) * | 2017-10-26 | 2018-02-27 | 西南石油大学 | A kind of maleic anhydride modified guanidine glue thickening agent and fracturing fluid and preparation method thereof |
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2004
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Effective date of registration: 20200928 Address after: 100007 Dongcheng District, Dongzhimen, China, North Street, No. 9 Oil Mansion, No. Patentee after: PetroChina Company Limited Patentee after: Daqing Oilfield Co.,Ltd. Address before: Heilongjiang Province, Daqing City Ranghulu District 163411 Patentee before: Daqing Oilfield Co.,Ltd. |