CN1563260A - Completion fluid in use for perforation of reservoir bed in hyposmosis - Google Patents
Completion fluid in use for perforation of reservoir bed in hyposmosis Download PDFInfo
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- CN1563260A CN1563260A CN 200410030678 CN200410030678A CN1563260A CN 1563260 A CN1563260 A CN 1563260A CN 200410030678 CN200410030678 CN 200410030678 CN 200410030678 A CN200410030678 A CN 200410030678A CN 1563260 A CN1563260 A CN 1563260A
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
A well completion fluid for low penetrating reservoir perforation is prepared from solium chloride, potassium chloride, 2-alkyl-N-ethory-N-hydroxypropyl sulfoimidazoline, trimethylpropenyl amine chloride and water. The prepared fluid can decrease expansibility of clay in reservoir layer and increase recovery value of core penetration coafficient.
Description
Technical field:
The present invention relates to the used a kind of well finishing liquid in shaft building completion technique field, oil field, belong to a kind of low permeability reservoir perforation completion liquid.
Background technology:
The completion engineering is the preceding road engineering of preparing for bringing in; to many reservoirs of drilling fluid well section be replaced out with the clear brine well finishing liquid before the perforation; the liquid that adopts this cleaning not have solid phase during perforation can increase oil well output; well finishing liquid promptly will satisfy various processing requirements; also to accomplish to protect oil reservoir conscientiously; prevent solid phase or drilling cuttings obstruction venturi, can prevent that again filtrate from invading oil reservoir and the interaction causing of reservoir composition clay swelling, fine migration etc. act on the fluid reaction generation precipitation obstruction oil reservoir that stops up in oil reservoir or the oil reservoir., hole low for rate of permeation shouted little, the low permeability reservoir that clay content is higher, application at present mostly is bromine salt, calcium salt well finishing liquid, this bromine salt, calcium salt well finishing liquid easily comprise with underground fluid that oil, Sweet natural gas, underground water, well-flushing interact to produce with seawater, carbonic acid gas etc. and precipitate, bigger to reservoir damage, particularly low to rate of permeation, hole is shouted little, and the higher low permeability reservoir of clay content injures bigger.
Summary of the invention:
When being applied to the low permeability reservoir perforation oil reservoir is injured big deficiency in order to overcome existing well finishing liquid, the invention provides a kind of low permeability reservoir perforation completion liquid, this low permeability reservoir perforation completion liquid is little to hyposmosis, ultra-low permeability reservoir injury, can significantly reduce the rate of expansion of clay in the reservoir, improve the recovery value of core permeability.
The technical solution used in the present invention is: this low permeability reservoir perforation completion liquid, each component and proportioning are as follows by weight: 7～10 parts in sodium-chlor, 0.5～1.0 part in Repone K, 2-alkyl-N-hydroxyethyl-0.4～0.6 part of N-hydroxypropyl sulfo group tetrahydroglyoxaline, 0.8～1.0 part of trimethylammonium propenyl chlorination amine, 85～95 parts in water.
8 parts in above-mentioned sodium-chlor, 0.8 part in Repone K, 2-alkyl-N-hydroxyethyl-0.5 part of N-hydroxypropyl sulfo group tetrahydroglyoxaline, 0.9 part of trimethylammonium propenyl chlorination amine, 90 parts in water.
The invention has the beneficial effects as follows: owing to take such scheme, this low permeability reservoir perforation completion liquid is by filtering, do not contain the suspension solid phase in the cleaning well finishing liquid, and add organic small cation clay stabilizer, and act synergistically mutually with inorganic ion, can reduce the rate of expansion of clay in the reservoir greatly, improve the recovery value of core permeability, this well finishing liquid is little to the oil reservoir injury.
Embodiment:
The present invention is further illustrated below in conjunction with embodiment:
This low permeability reservoir perforation completion liquid, each component and proportioning are as follows by weight: 7～10 parts in sodium-chlor, 0.5～1.0 part in Repone K, 2-alkyl-N-hydroxyethyl-0.4～0.6 part of N-hydroxypropyl sulfo group tetrahydroglyoxaline, 0.8～1.0 part of trimethylammonium propenyl chlorination amine, 85～95 parts in water.Content is preferably: 8 parts in sodium-chlor, 0.8 part in Repone K, 2-alkyl-N-hydroxyethyl-0.5 part of N-hydroxypropyl sulfo group tetrahydroglyoxaline, 0.9 part of trimethylammonium propenyl chlorination amine, 90 parts in water.This well finishing liquid is little to hyposmosis, ultra-low permeability reservoir injury.
The salt that uses in this well finishing liquid is sodium-chlor and Repone K, these two kinds of salt and underground fluid comprise that oil, Sweet natural gas, underground water, well-flushing do not produce precipitation with interactions such as seawater, carbonic acid gas, and it is little particularly hole to be shouted the reservoir damage little, that rate of permeation is low; Trimethylammonium propenyl chlorination amine in the well finishing liquid plays the effect of clay stabilizer, trimethylammonium propenyl chlorination amine is the small cation stablizer, because the clay particle water-swelling forms two voltages, the small cation stablizer can compress two voltages and avoid causing clay swelling behind the clay contacting in salt solution and the rock, the clay particle size is increased, directly stop up venturi, can prevent from simultaneously to strip down from ma after clay from meeting water, stop up venturi through migration, improved rate of permeation, minimizing is to the injury of oil reservoir, this clay stabilizer and inorganic ion act synergistically mutually, can significantly reduce the rate of expansion of clay in the reservoir; 2-alkyl in the well finishing liquid-N-hydroxyethyl-N-hydroxypropyl sulfo group tetrahydroglyoxaline inhibiter, it is adsorbed on the metal tube surface, the performance of acid-and base-resisting, salt is good, effectively reduce the corrosion of salt solution to equipment, the metal ion after avoiding corroding stops up oil pipe and metal ion and the obstruction of underground fluid generation precipitation and shouts.This low permeability reservoir perforation completion liquid does not contain the suspension solid phase by filtering in the cleaning well finishing liquid, and improves the recovery value of core permeability.Density can be adjustable between 1.0～1.3, mainly regulates by the kind and the dosage of salt.
Following table 1 is this well finishing liquid each component mix proportion scheme: table 1
| Scheme proportioning (part) component | Scheme 1 | Scheme 2 | Scheme 3 |
| Repone K | ????7 | ????8 | ????10 |
| Sodium-chlor | ????0.5 | ????0.8 | ????1.0 |
| 2-alkyl-N-hydroxyethyl-N-hydroxypropyl sulfo group tetrahydroglyoxaline | ????0.5 | ????0.5 | ????0.5 |
| Trimethylammonium propenyl chlorination amine | ????0.8 | ????0.9 | ????1.0 |
| Water | ????85 | ????90 | ????95 |
Adopt the Q/SYDQ0794-2002 standard that this clean-out system detected result is seen the following form 2:
Table 2
| Project | Scheme 3 | Scheme 2 | Scheme 1 |
| Oil droplet agglomerated temperature reduction amplitude (℃) | ????3.5 | ????5 | ????5.5 |
| Density (g/cm 3) | ????1.05 | ????1.06 | ????1.075 |
| Erosion rate (g/cm 3·h) | ????0.001 | ????0.0008 | ????0.002 |
| Suspended solids content (mg/l) | ????6 | ????8 | ????10 |
| Suspended solids median diameter (m) | ????1.0 | ????1.0 | ????2.0 |
| PH value | ????6.8 | ????7.5 | ????7.2 |
Embodiment 1: the 14 mouthfuls of wells of nine factories dragons 25-12 well that recover the oil, newly bet well finishing liquid that well takes scheme 1 preparation in the table 1 to oil reservoir completion sfgd. after, average trigger pressure decline of initial stage 0.7Mpa, apparent water injectivity index rising 1.09m
3/ dmMpa.
Embodiment 2: the five factories No. 19 mouth wells in high estrade oil field that recover the oil, the well finishing liquid of scheme 2 preparations in the application table 1 carries out the completion protection to oil reservoir, average trigger pressure decline 1.18Mpa, apparent water injectivity index rising 2.7m
3/ dmMpa.
Embodiment 3: 455 mouthfuls of wells of the new estrade of five factories of recovering the oil; the well finishing liquid of scheme 3 preparations in the application table 1 carries out the completion protection to oil reservoir; the oil recovery ability obviously improves, and oil production intensity is 0.2634t/dm Ex ante, and oil production intensity is increased to 0.2634t/dm Ex post.
Claims (2)
1, a kind of low permeability reservoir perforation completion liquid, it is characterized in that: each component and proportioning are as follows by weight: 7～10 parts in sodium-chlor, 0.5～1.0 part in Repone K, 2-alkyl-N-hydroxyethyl-0.4～0.6 part of N-hydroxypropyl sulfo group tetrahydroglyoxaline, 0.8～1.0 part of trimethylammonium propenyl chlorination amine, 85～95 parts in water.
2, low permeability reservoir perforation completion liquid according to claim 1, it is characterized in that: each component content is preferably: 8 parts in sodium-chlor, 0.8 part in Repone K, 2-alkyl-N-hydroxyethyl-0.5 part of N-hydroxypropyl sulfo group tetrahydroglyoxaline, 0.9 part of trimethylammonium propenyl chlorination amine, 90 parts in water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410030678 CN1233784C (en) | 2004-04-05 | 2004-04-05 | Completion fluid in use for perforation of reservoir bed in hyposmosis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410030678 CN1233784C (en) | 2004-04-05 | 2004-04-05 | Completion fluid in use for perforation of reservoir bed in hyposmosis |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1563260A true CN1563260A (en) | 2005-01-12 |
| CN1233784C CN1233784C (en) | 2005-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410030678 Expired - Fee Related CN1233784C (en) | 2004-04-05 | 2004-04-05 | Completion fluid in use for perforation of reservoir bed in hyposmosis |
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| CN (1) | CN1233784C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930231A (en) * | 2021-12-17 | 2022-01-14 | 中海油田服务股份有限公司 | Water-based well completion fluid and preparation and application thereof |
-
2004
- 2004-04-05 CN CN 200410030678 patent/CN1233784C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930231A (en) * | 2021-12-17 | 2022-01-14 | 中海油田服务股份有限公司 | Water-based well completion fluid and preparation and application thereof |
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| Publication number | Publication date |
|---|---|
| CN1233784C (en) | 2005-12-28 |
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Granted publication date: 20051228 Termination date: 20110405 |