CN104445700A - 一种胍胶压裂废液处理回用的方法 - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 24
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 title claims abstract description 18
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 title claims abstract description 9
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 title claims abstract description 9
- 239000002699 waste material Substances 0.000 title abstract description 24
- 239000007788 liquid Substances 0.000 title abstract description 16
- 238000004064 recycling Methods 0.000 title abstract description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 26
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 24
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 10
- 229920002401 polyacrylamide Polymers 0.000 claims abstract description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 9
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 14
- 239000003292 glue Substances 0.000 claims description 7
- 239000010808 liquid waste Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 11
- 239000011575 calcium Substances 0.000 abstract description 6
- 229910052791 calcium Inorganic materials 0.000 abstract description 6
- 229910052742 iron Inorganic materials 0.000 abstract description 6
- 239000011777 magnesium Substances 0.000 abstract description 6
- 229910052749 magnesium Inorganic materials 0.000 abstract description 6
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 abstract description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract description 5
- 150000002500 ions Chemical class 0.000 abstract description 5
- 230000001580 bacterial effect Effects 0.000 abstract description 4
- 244000005700 microbiome Species 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 235000017550 sodium carbonate Nutrition 0.000 description 5
- 239000012530 fluid Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000005189 flocculation Methods 0.000 description 3
- 230000016615 flocculation Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910021645 metal ion Inorganic materials 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000000844 anti-bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
- 230000001488 breeding effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- XEEVLJKYYUVTRC-UHFFFAOYSA-N oxomalonic acid Chemical compound OC(=O)C(=O)C(O)=O XEEVLJKYYUVTRC-UHFFFAOYSA-N 0.000 description 1
- 229910001414 potassium ion Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5272—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using specific organic precipitants
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Hydrology & Water Resources (AREA)
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Abstract
本发明涉及一种胍胶压裂废液处理回用的方法；先投加氢氧化钾和碳酸钠，搅拌5～10min，再投加聚丙烯酰胺溶液，最后在处理水回用前2h内投加草酸调pH6～7.5；各处理剂加投量为：氢氧化钾500～1000mg/L、碳酸钠200～300mg/L、聚丙烯酰胺5～15mg/L、草酸300～500mg/L；应用该方法处理废液后，废液中悬浮固体除率在85%以上，处理后水质铁、钙、镁等高价离子浓度小于300mg/L，细菌微生物小于100个/L,满足再利用要求。
Description
技术领域
本发明涉及废液处理领域，特别涉及一种适用于常规胍胶压裂废液处理回用的处理剂体系。
背景技术
油气井压裂是油气田开发重要的技术措施，尤其对低渗透储层和老井重复改造至关重要，是最常用、最有效的开发手段之一。随着对能源需求量的持续增大，低渗透油气田、致密油藏被大量开发，水平井多段压裂、混合水体积压裂等技术广范应用。水平井压裂不仅需要大量的清水资源，同时也会产生大量压裂废液，单井废液量多达几千方。产生的压裂返排废液具有高COD、高矿化度、高悬浮物等特点，含有大量的有机物、无机物、油、细菌等，不仅外排困难、处理难度大，且对环境产生潜在的危害。
当前压裂废液处理技术多以外排为目的，以催化氧化为主要处理技术，工艺复杂。如果将压裂废液处理后再用于下一级或下口井压裂，实现工业回用，不仅解决了压裂返排液外排的问题，而且也能节省大量的水资源。将压裂废液处理后回用也克服了外排需控制COD等指标而采用复杂工艺；将压裂废液处理成可循环利用的工业用水，需除去废液中的杂质、悬浮物等以降低再配液的摩阻、保护储层，还需要控制矿化度尤其是钙、镁、铁等高价金属离子的浓度，尤其需要去除废液中残留的破胶剂及大量的细菌微生物，保证回用时可配液交联。因此，压裂废液处理主要应用絮凝及离子控制技术，但常规絮凝技术及絮凝剂配方难以满足压裂返排废液处理及再利用的要求。
发明内容
本发明的目的是提供一种常规胍胶压裂废液处理回用的方法；利用复合处理剂体系中投加的氢氧化钾（KOH）和碳酸钠（Na2CO3）反应产生高价离子氢氧化物或碳酸盐沉淀去除废液中铁、钙、镁等离子，利用高价离子氢氧化物的絮凝作用及沉淀物凝聚核作用，使废液中悬浮物、胶体残渣等吸附聚集成絮体，并通过PAM的网扫助凝作用使絮体变大、沉降，达到去除废液中悬浮物、高价离子等杂质。
本发明所述的一种胍胶压裂废液处理回用的方法，其各处理剂加量为：
氢氧化钾（KOH）500～1000mg/L
碳酸钠（Na2CO3）200～300mg/L
聚丙烯酰胺（PAM）5～15mg/L
草酸（C2H2O4）300～500mg/L
所述的胍胶压裂废液处理回用的方法是先投加氢氧化钾和碳酸钠，搅拌5～10min，再投加聚丙烯酰胺溶液，最后在处理水回用前2h内投加草酸调pH6～7.5。
本方法以氢氧化钾作为絮凝和离子去除剂，其中的钾离子具有较强的页岩抑制能力，利于处理水回用时对地层的保护；同时氢氧化钾将水调为碱性，碱性环境可抑制细菌的繁殖，保障处理水的可回用性。最后在处理水回用前2小时用草酸将水的pH调整6-7.5，满足回用要求。该处理剂体系中草酸具有较强的还原性，可中和压裂废液中残留破胶剂，并具有络合掩蔽钙、镁、铁高价金属离子的作用。
该碱性处理剂体系对不同区块、不同性能的常规胍胶压裂返排废液处理效果显著，但需根据现场废液特征，调整配方比例及处理剂加量，保证处理效果。应用该处理剂体系处理后废液中悬浮固体去处理率在85%以上，处理后水质铁、钙、镁等高价离子浓度小于300mg/L，细菌微生物小于100个/L,满足再利用要求。
本发明对减少油气田开发清水资源使用量、提高废液再利用率、降低井场生态环保风险、减少备水时间、提高施工效率有积极作用；尤为突出的是解决了大量压裂废液难以排放、污染环境的问题，对保护水资源和生态环境意义重大，将环境效益和经济效益有机结合，具有广阔的应用前景。
具体实施方式
本发明的目的是采用以下方式实现的，下面结合实施例及实验例进行详细说明。
实施例1
JY油田AP44井混合水压裂返排废液颜色褐黄色，废液悬浮物为642mg/l，钙镁铁离子浓度，细菌微生物。按氢氧化钾800mg/L、碳酸钠200mg/L的加量投加，搅拌5分钟，按干粉10mg/L的加量加入0.5%的聚丙烯酰胺溶液，再加入450mg/L的草酸调pH为6.8。处理前后水质对比见表1。
表1压裂废液处理前后水质对比
Claims (1)
1.一种胍胶压裂废液处理回用的方法，其特征在于：
先投加氢氧化钾和碳酸钠，搅拌5～10min，再投加聚丙烯酰胺溶液，最后在处理水回用前2h内投加草酸调pH6～7.5；
各处理剂加投量为：氢氧化钾500～1000mg/L、碳酸钠200～300mg/L、聚丙烯酰胺5～15mg/L、草酸300～500mg/L。
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156087A (zh) * | 2015-09-28 | 2015-12-16 | 中国石油化工股份有限公司 | 一种利用胍胶类压裂返排液提高原油采收率的方法 |
| CN108191021A (zh) * | 2018-01-17 | 2018-06-22 | 中铁二局集团有限公司 | 一种施工中废水沉淀处理的方法 |
| US11987513B2 (en) | 2019-07-04 | 2024-05-21 | Xi'an Shiyou University | Method for synergistic degradation treatment of polysaccharide-containing polymer wastewater by controllable—OH radical |
-
2013
- 2013-09-13 CN CN201310416289.0A patent/CN104445700A/zh active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156087A (zh) * | 2015-09-28 | 2015-12-16 | 中国石油化工股份有限公司 | 一种利用胍胶类压裂返排液提高原油采收率的方法 |
| CN105156087B (zh) * | 2015-09-28 | 2018-02-16 | 中国石油化工股份有限公司 | 一种利用胍胶类压裂返排液提高原油采收率的方法 |
| CN108191021A (zh) * | 2018-01-17 | 2018-06-22 | 中铁二局集团有限公司 | 一种施工中废水沉淀处理的方法 |
| US11987513B2 (en) | 2019-07-04 | 2024-05-21 | Xi'an Shiyou University | Method for synergistic degradation treatment of polysaccharide-containing polymer wastewater by controllable—OH radical |
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