CN103074046A - Completion fluid used for removing filter cake formed by oil-based drilling fluid and preparation method thereof - Google Patents
Completion fluid used for removing filter cake formed by oil-based drilling fluid and preparation method thereof Download PDFInfo
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- CN103074046A CN103074046A CN2011103266056A CN201110326605A CN103074046A CN 103074046 A CN103074046 A CN 103074046A CN 2011103266056 A CN2011103266056 A CN 2011103266056A CN 201110326605 A CN201110326605 A CN 201110326605A CN 103074046 A CN103074046 A CN 103074046A
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Abstract
The invention provides a completion fluid used for removing a filter cake formed by an oil-based drilling fluid and a preparation method thereof. The completion fluid comprises, by weight, 85 to 92% of a base fluid, 2 to 4% of a main emulsifier, 2 to 3% of an auxiliary emulsifier, 1 to 3% of a mutual solvent and 3 to 5% of a high-efficiency blocking remover and can effectively remove the filter cake formed by the oil-based drilling fluid and protect a hydrocarbon reservoir.
Description
Technical field
The present invention relates to a kind of petroleum drilling well finishing liquid, particularly a kind of well finishing liquid and preparation method for removing the oil base drilling fluid filter cake.
Background technology
Oil base drilling fluid has the advantages such as strong inhibition capability, contamination resistance are strong, protection hydrocarbon zone, therefore, often is used in some water sensitivities bad ground that easily caves in.But the formed filter cake of oil base drilling fluid is easy to stop up the formation pore of screen casing or immediate vicinity of wellbore, causes the infringement of oil reservoir.In order to remove these filter cakes, the at present main acid pasting of domestic method commonly used and oxidation cracks method etc., but mostly these methods be to conduct a research for water-base drilling fluid, Research on Oil base drilling fluid filter cake clearance technique then less.Wang Fuhua etc. are a kind of oxidation treatment liquid of proposition (see " Drilling and completion fluids ", 2001,18(2)) in " oxidation style is eliminated the laboratory experiment of drilling completion liquid-solid phase infringement ".A kind of oil base drilling fluid filter cake removal liquid HCF that Yue Qiansheng etc. propose in " the oil base drilling fluid Removing technique of oil based under the open hole completion of horizontal well condition ", that a kind of metastable O/w emulsion system (is seen " Drilling and completion fluids ", 2005,22(3)).Li Weiping etc. have proposed a kind of oil-base mud mud cake and have removed liquid in " HCF-A oil-base mud mud cake is removed research in the liquid chamber ", component comprises that base oil, organic solvent, emulsifying agent, organic acid, cleaning permeate agent, inhibiter (see " petroleum geology and engineering ", 2007,21(5)).The patent of publication number CN101955764A discloses a kind of clay-free drilling fluid filter cake removing system, comprises cleaning breaking glue solution, corrosion breaking glue solution, rear scavenging solution.The patent of publication number CN101597488A discloses a kind of high solid phase drilling fluid filter cake removal treating fluid, comprises cleaning breaking glue solution, corrosion breaking glue solution, rear scavenging solution, and is better to the corrosion effect of organic positive gel drilling fluid filter cake.The patent of publication number CN1660959A discloses provides a kind of filter cake to remove liquid, is comprised of acid (HCl+HF), cleaning permeate agent, solvent-borne type organism, dissolved bitumen class fluid loss agent, clay stabilizer, inhibiter, Repone K (KCl), the aqueous solution.Shortcoming or the deficiency of these technology are: 1. single employing acidization is processed, and polymkeric substance is removed poor effect, and the acid amount that needs simultaneously is larger, and the excessive acid stratum matrix of degrading discharges fine particle, and these particles can be migrated and be caused bridging plug, the restriction production capacity.2. contain water in the component, easily cause the pollution of oil base drilling fluid, reduce its recycling efficient; Easily cause simultaneously the water blocking damage of oil reservoir.3. because in Completion Operations, some processing requirement pumps into first well finishing liquid and descend screen casing again, therefore requires the mud cake can not be destroyed in for some time before lower screen casing, but it is too fast partly to remove the liquid de-emulsification speed, can not guarantee this point.4. component is many, and complex process has increased difficulty of construction and cost.5. be used in multiple drilling fluid, specific aim is not strong, easily causes effect undesirable.6. part is removed liquid and is used strong acid, easily causes the corrosion of screen casing.
Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned technology; the filter cake that produces in a kind of effective removing oil base drilling fluid construction process is provided; prevent that filter cake from stopping up screen casing or immediate vicinity of wellbore formation pore, improve the well finishing liquid and the preparation method that are used for removing the oil base drilling fluid filter cake of reservoir protection effect.
Technical scheme of the present invention is achieved in that a kind of well finishing liquid for removing the oil base drilling fluid filter cake is comprised of base fluid, primary emulsion, co-emulsifier, mutual solvent and efficient blockage removing agent, wherein the weight percent of base fluid is 85% ~ 92%, the weight percent of primary emulsion is 2% ~ 4%, the weight percent of co-emulsifier is 2% ~ 3%, the weight percent of mutual solvent be 1% ~ 3% and the weight percent of efficient blockage removing agent be 3% ~ 5%.
In the such scheme, base fluid is formulated by weight 1 ~ 2:4 ~ 5 by diesel oil and white oil; Primary emulsion is one or several in sodium lauryl sulphate salt, oleic acid, stearic acid sodium salt or the dialkyl succinylsuccinate ester sodium sulfonate; Co-emulsifier is one or more in polyoxyethylene oleic acid ester, polyoxyethylene stearic acid ester, Span-80 or the Glycerol dimer polypropylene glycol ether, mutual solvent is one or more in ethylene glycol, propyl alcohol, Virahol, amylalcohol or the tetrachloroethane, and efficient blockage removing agent is biological enzyme.Described biological enzyme is one or more in amylase, cellulase, modified-cellulose enzyme, treated starch enzyme, the acylamide polymer lytic enzyme.
Technical scheme of the present invention comprises that also the preparation method of described well finishing liquid for removing the oil base drilling fluid filter cake is: at first diesel oil and white oil are mixed with base fluid in proportion, and mix for subsequent use; Then primary emulsion, co-emulsifier, mutual solvent are mixed in reactor in proportion, add in proportion again efficient blockage removing agent, add in proportion base fluid after fully stirring, stir.
The present invention has following advantage: the compound mud cake null method of binary that has 1. adopted acidifying to combine with the cellulase treatment technology, combine the advantage that acidification and enzyme are processed, and improved the filter cake elimination efficiency, can effectively protect hydrocarbon zone.Show this well surveying test solution amount 9m by the rig-site utilization that flat 4 wells of king 73-are carried out
3/ d is 3 times of adjacent level well, shows that filter cake removes respond well.2. base fluid adopts diesel oil and white oil is composite forms, and does not contain water, can prevent sealing to the pollution of oil base drilling fluid, prevents from reservoir is formed water blocking damage; Base fluid employing diesel oil and white oil are composite simultaneously, can avoid the reduction because of the too high elimination efficiency that causes of base fluid viscosity.3. component is few, and technique is simple, has reduced the complicacy of construction.4. mainly for the removing of filter cake that oil base drilling fluid forms, with strong points, efficient is high, and filter cake is removed effective.5. the filter cake clean-up time is controlled within the 24h-48h, satisfies the special process requirement.6. adopt weak acid, corrodibility is little.
Description of drawings
A kind of well finishing liquid for removing the oil base drilling fluid filter cake of Fig. 1 soaks filter cake experimental result schematic diagram.
Embodiment
Embodiment one: be that 89% base fluid, weight percent are that 4% primary emulsion, weight percent are that 2% co-emulsifier, weight percent are that 2% mutual solvent and weight percent are that 3% efficient blockage removing agent is mixed with a kind of well finishing liquid for removing the oil base drilling fluid filter cake by compound method with weight percent.Wherein, base fluid is synthetic by weight the 1:4 preparation by diesel oil and white oil, and primary emulsion is that sodium lauryl sulphate salt and oleic acid are prepared by weight 1:5, and co-emulsifier is Span-80, and mutual solvent is tetrachloroethane, and efficient blockage removing agent is biological enzyme.Described biological enzyme is selected from the biological enzyme that has been used at present the oil extraction in oil field use, as selecting one or more of combinations in amylase, cellulase, modified-cellulose enzyme, treated starch enzyme, the acylamide polymer lytic enzyme.
Soak oil base drilling fluid with the well finishing liquid that is used for removing oil base drilling fluid filter cake for preparing and measure the filter cake that forms in (seeing industry standard SY/T 5621-93) at the press filtration vector.Filter cake is loose after soaking 24h, and one bumps namely brokenly, removes respond well.See accompanying drawing 1.
Embodiment two: flat 4 well locations of king 73-are in the old government's bank of Dongying Sag, Jiyang Depression-Wang Jiagang fracture scalariform structural belt king 732 blocks, finishing drilling well depth 1833.00m.Three open horizontal section adopts oil base drilling fluid system, accurate sand screen completion.Be that 90% base fluid, weight percent are that 3% primary emulsion, weight percent are that 2% co-emulsifier, weight percent are that 2% mutual solvent and weight percent are that 3% efficient blockage removing agent is mixed with a kind of well finishing liquid for removing the oil base drilling fluid filter cake by compound method with weight percent.Wherein, base fluid is synthetic by weight the 1:4 preparation by diesel oil and white oil, and primary emulsion is that sodium lauryl sulphate salt and stearic acid sodium salt are prepared in the 1:1 ratio, and co-emulsifier is polyoxyethylene oleic acid ester, and mutual solvent is ethylene glycol, and efficient blockage removing agent is biological enzyme.Described biological enzyme is one or both in amylase, cellulase, modified-cellulose enzyme, treated starch enzyme, the acylamide polymer lytic enzyme.
Amount of preparation satisfies on-the-spot requirement, injects on request the flat 4 well wells of king 73-.This well surveying test solution amount is 9m after using
3/ d is 3 times of adjacent level well, shows that this well finishing liquid that is used to remove the oil base drilling fluid filter cake can effectively remove the filter cake that oil base drilling fluid forms, and prevents that filter cake from stopping up screen casing, effectively protects hydrocarbon zone.
Embodiment three: the preparation method that being used in the previous embodiment one and two removed the well finishing liquid of oil base drilling fluid filter cake is: at first diesel oil and white oil are mixed with base fluid in proportion, and mix for subsequent use; Then primary emulsion, co-emulsifier, mutual solvent are mixed in reactor in proportion, add in proportion again efficient blockage removing agent, add in proportion base fluid after fully stirring, stir.Described biological enzyme is one or both in amylase, cellulase, modified-cellulose enzyme, treated starch enzyme, the acylamide polymer lytic enzyme.
Claims (5)
1. well finishing liquid of be used for removing the oil base drilling fluid filter cake, it is characterized in that: formed by base fluid, primary emulsion, co-emulsifier, mutual solvent and efficient blockage removing agent, wherein the weight percent of base fluid is 85% ~ 92%, the weight percent of primary emulsion is 2% ~ 4%, the weight percent of co-emulsifier is 2% ~ 3%, the weight percent of mutual solvent is 1% ~ 3%, and the weight percent of efficient blockage removing agent is 3% ~ 5%.
2. the well finishing liquid for removing the oil base drilling fluid filter cake according to claim 1, it is characterized in that: described base fluid is by diesel oil and white oil is composite forms, primary emulsion is one or several in sodium lauryl sulphate salt, oleic acid, stearic acid sodium salt or the dialkyl succinylsuccinate ester sodium sulfonate, co-emulsifier is one or more in polyoxyethylene oleic acid ester, polyoxyethylene stearic acid ester, Span-80 or the Glycerol dimer polypropylene glycol ether, mutual solvent is one or more in ethylene glycol, propyl alcohol, Virahol, amylalcohol or the tetrachloroethane, and efficient blockage removing agent is biological enzyme.
3. the well finishing liquid for removing the oil base drilling fluid filter cake according to claim 1 is characterized in that: described base fluid by diesel oil and white oil by weight 1 ~ 2:4 ~ 5.
4. the well finishing liquid for removing the oil base drilling fluid filter cake according to claim 2, it is characterized in that: described biological enzyme is one or more in amylase, cellulase, modified-cellulose enzyme, treated starch enzyme, the acylamide polymer lytic enzyme.
5. the preparation method of the well finishing liquid for removing the oil base drilling fluid filter cake according to claim 1, it is characterized in that: at first diesel oil and white oil are mixed with base fluid in proportion, and mix for subsequent use, then primary emulsion, co-emulsifier, mutual solvent are mixed in reactor in proportion, add in proportion again efficient blockage removing agent, add in proportion base fluid after fully stirring, stir.
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| CN201110326605.6A CN103074046B (en) | 2011-10-25 | 2011-10-25 | Completion fluid used for removing filter cake formed by oil-based drilling fluid and preparation method thereof |
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| CN201110326605.6A CN103074046B (en) | 2011-10-25 | 2011-10-25 | Completion fluid used for removing filter cake formed by oil-based drilling fluid and preparation method thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103275684A (en) * | 2013-06-07 | 2013-09-04 | 向东 | Oilfield hot-washing oil-base high-efficiency paraffin-removal paraffin inhibitor |
| CN103710010A (en) * | 2013-12-30 | 2014-04-09 | 安东石油技术（集团）有限公司 | High-temperature resistant oil base drilling fluid system |
| CN103725268A (en) * | 2013-12-26 | 2014-04-16 | 安东石油技术（集团）有限公司 | High-temperature-resistant oil base drilling fluid emulsifier |
| CN104194759A (en) * | 2014-09-23 | 2014-12-10 | 甘肃黑马石化工程有限公司 | Neutral blockage removing agent composition used for oil recovery formation in oilfield and preparation method thereof |
| CN104277805A (en) * | 2013-07-03 | 2015-01-14 | 中国石油化工集团公司 | Filter cake cleaning fluid and preparation method thereof |
| CN104726083A (en) * | 2013-12-23 | 2015-06-24 | 中国石油化工集团公司 | Micro-emulsion completion fluid and application of the micro-emulsion completion fluid |
| CN104805443A (en) * | 2015-01-23 | 2015-07-29 | 中石化石油工程技术服务有限公司 | Pretreatment method of corrosion inhibitor |
| CN107663446A (en) * | 2016-07-28 | 2018-02-06 | 中国石油化工股份有限公司 | A kind of oil base drilling fluid de-plugging agent and preparation method thereof |
| CN108240953A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | A kind of barite de-plugging agent device for evaluating performance and its evaluation method |
| CN109054789A (en) * | 2018-07-11 | 2018-12-21 | 中国石油化工股份有限公司 | A kind of microemulsion-type well cementation flushing liquor and preparation method thereof |
| CN111946309A (en) * | 2020-08-10 | 2020-11-17 | 王誉清 | Cold damage prevention dredging agent for low temperature resistant oil reservoir |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103275684A (en) * | 2013-06-07 | 2013-09-04 | 向东 | Oilfield hot-washing oil-base high-efficiency paraffin-removal paraffin inhibitor |
| CN104277805B (en) * | 2013-07-03 | 2017-02-15 | 中国石油化工集团公司 | Filter cake cleaning fluid and preparation method thereof |
| CN104277805A (en) * | 2013-07-03 | 2015-01-14 | 中国石油化工集团公司 | Filter cake cleaning fluid and preparation method thereof |
| CN104726083B (en) * | 2013-12-23 | 2018-09-25 | 中国石油化工集团公司 | A kind of micro emulsion completion fluid and its application |
| CN104726083A (en) * | 2013-12-23 | 2015-06-24 | 中国石油化工集团公司 | Micro-emulsion completion fluid and application of the micro-emulsion completion fluid |
| CN103725268A (en) * | 2013-12-26 | 2014-04-16 | 安东石油技术（集团）有限公司 | High-temperature-resistant oil base drilling fluid emulsifier |
| CN103725268B (en) * | 2013-12-26 | 2016-05-25 | 安东石油技术（集团）有限公司 | High temperature resistance oil base drilling fluid emulsifying agent |
| CN103710010B (en) * | 2013-12-30 | 2017-02-22 | 安东石油技术（集团）有限公司 | High-temperature resistant oil base drilling fluid system |
| CN103710010A (en) * | 2013-12-30 | 2014-04-09 | 安东石油技术（集团）有限公司 | High-temperature resistant oil base drilling fluid system |
| CN104194759B (en) * | 2014-09-23 | 2017-03-15 | 甘肃黑马石化工程有限公司 | Oil extraction in oil field stratum neutral de-plugging agent composition and preparation method thereof |
| CN104194759A (en) * | 2014-09-23 | 2014-12-10 | 甘肃黑马石化工程有限公司 | Neutral blockage removing agent composition used for oil recovery formation in oilfield and preparation method thereof |
| CN104805443A (en) * | 2015-01-23 | 2015-07-29 | 中石化石油工程技术服务有限公司 | Pretreatment method of corrosion inhibitor |
| CN107663446A (en) * | 2016-07-28 | 2018-02-06 | 中国石油化工股份有限公司 | A kind of oil base drilling fluid de-plugging agent and preparation method thereof |
| CN108240953A (en) * | 2016-12-27 | 2018-07-03 | 中国石油天然气股份有限公司 | A kind of barite de-plugging agent device for evaluating performance and its evaluation method |
| CN108240953B (en) * | 2016-12-27 | 2020-09-04 | 中国石油天然气股份有限公司 | Device and method for evaluating performance of barite blocking remover |
| CN109054789A (en) * | 2018-07-11 | 2018-12-21 | 中国石油化工股份有限公司 | A kind of microemulsion-type well cementation flushing liquor and preparation method thereof |
| CN111946309A (en) * | 2020-08-10 | 2020-11-17 | 王誉清 | Cold damage prevention dredging agent for low temperature resistant oil reservoir |
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Effective date of registration: 20230621 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Drilling fluid technology service center of Sinopec Shengli Petroleum Engineering Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: SHENGLI DRILLING TECHNOLOGY Research Institute OF SINOPEC |
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