CN103484092A - 一种超低温胍胶压裂液 - Google Patents
一种超低温胍胶压裂液 Download PDFInfo
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- 239000012530 fluid Substances 0.000 title claims abstract description 35
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 title claims description 26
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 title claims description 13
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 title claims description 13
- 239000004927 clay Substances 0.000 claims abstract description 6
- 239000012190 activator Substances 0.000 claims abstract description 5
- 239000003381 stabilizer Substances 0.000 claims abstract description 5
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 239000007788 liquid Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 10
- 239000004160 Ammonium persulphate Substances 0.000 claims description 9
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 9
- 229910021591 Copper(I) chloride Inorganic materials 0.000 claims description 9
- 239000004971 Cross linker Substances 0.000 claims description 9
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical group [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 9
- 235000019395 ammonium persulphate Nutrition 0.000 claims description 9
- OXBLHERUFWYNTN-UHFFFAOYSA-M copper(I) chloride Chemical group [Cu]Cl OXBLHERUFWYNTN-UHFFFAOYSA-M 0.000 claims description 9
- 229940045803 cuprous chloride Drugs 0.000 claims description 9
- -1 polyoxyethylene propylene Polymers 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 5
- 230000003750 conditioning effect Effects 0.000 claims description 3
- SXRSQZLOMIGNAQ-UHFFFAOYSA-N Glutaraldehyde Chemical compound O=CCCCC=O SXRSQZLOMIGNAQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910021626 Tin(II) chloride Inorganic materials 0.000 claims description 2
- 239000013543 active substance Substances 0.000 claims description 2
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical group FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical group O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 2
- GOQYKNQRPGWPLP-UHFFFAOYSA-N n-heptadecyl alcohol Natural products CCCCCCCCCCCCCCCCCO GOQYKNQRPGWPLP-UHFFFAOYSA-N 0.000 claims description 2
- GLDOVTGHNKAZLK-UHFFFAOYSA-N n-octadecyl alcohol Natural products CCCCCCCCCCCCCCCCCCO GLDOVTGHNKAZLK-UHFFFAOYSA-N 0.000 claims description 2
- 150000003242 quaternary ammonium salts Chemical class 0.000 claims description 2
- 235000011150 stannous chloride Nutrition 0.000 claims description 2
- AXZWODMDQAVCJE-UHFFFAOYSA-L tin(II) chloride (anhydrous) Chemical compound [Cl-].[Cl-].[Sn+2] AXZWODMDQAVCJE-UHFFFAOYSA-L 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 239000000654 additive Substances 0.000 abstract description 9
- 230000000996 additive effect Effects 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 2
- 229920002907 Guar gum Polymers 0.000 abstract 1
- 230000000844 anti-bacterial effect Effects 0.000 abstract 1
- 239000003899 bactericide agent Substances 0.000 abstract 1
- 239000003431 cross linking reagent Substances 0.000 abstract 1
- 239000000665 guar gum Substances 0.000 abstract 1
- 229960002154 guar gum Drugs 0.000 abstract 1
- 235000010417 guar gum Nutrition 0.000 abstract 1
- 229920013818 hydroxypropyl guar gum Polymers 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 13
- 238000003756 stirring Methods 0.000 description 12
- 239000003292 glue Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 6
- 208000010392 Bone Fractures Diseases 0.000 description 5
- 206010017076 Fracture Diseases 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000004215 Carbon black (E152) Substances 0.000 description 4
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229930195733 hydrocarbon Natural products 0.000 description 4
- 125000001183 hydrocarbyl group Chemical group 0.000 description 4
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
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- 238000002360 preparation method Methods 0.000 description 3
- 244000007835 Cyamopsis tetragonoloba Species 0.000 description 2
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- 230000008859 change Effects 0.000 description 2
- 239000000084 colloidal system Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 235000010288 sodium nitrite Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JDXXTKLHHZMVIO-UHFFFAOYSA-N 2-(3-hydroxypropyl)guanidine Chemical compound NC(=N)NCCCO JDXXTKLHHZMVIO-UHFFFAOYSA-N 0.000 description 1
- 206010010214 Compression fracture Diseases 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- 239000004159 Potassium persulphate Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 235000019394 potassium persulphate Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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Abstract
本发明涉及一种超低温胍胶压裂液,由0.3%—0.45%羟丙基胍尔胶、1—15%KCL、1—3%助排剂、0.5—2%破乳剂、0.5—2%%粘土稳定剂、0.1-0.5%杀菌剂、0.01—0.03%pH值调节剂、0.002—0.008%激活剂、交联剂0.1-0.3%、破胶剂0.04-0.1%、余量为水组成;本发明能够在很大程度上提高压裂液的使用效果,使压裂液在温度15℃—35℃低温条件下彻底破胶并返排。
Description
技术领域:
本发明涉及油田压裂技术领域,是一种超低温水基胍胶压裂液体系,特别是适应于15℃—35℃的原油储层进行压裂改造。
背景技术
在克拉玛依油田勘探过程中发现很多浅层油气藏,如乌尔禾的佳木禾组油藏、百口泉古16井区北断块石炭系储层及克拉玛依一中区克拉玛依组油藏等,储层平均孔隙度7%~25%,渗透率为0110×1023~3163×1023Lm2;油气藏埋藏深度450~1500m,地层温度15—35℃。随着开采的持续进行,储层能量降低,产量下降。为了提高产量,必须对储层进行压裂改造。要想取得良好的压裂效果,不仅要求压裂液具有良好的流变性、悬砂性、降滤失性,还必须具有良好的破胶化水性能,以提高压裂液的返排率,减少对储层的伤害。由于油气藏埋藏深度较浅、地层温度低,常用的过硫酸盐破胶剂分解温度≥45℃,因此常规的水基胍胶压裂液在低于35℃的油层中破胶水化比较困难。我院压裂研究所根据克拉玛依油气藏的储层特点,研制出了低温破胶压裂液,能在较低温度下彻底破胶、快速返排。目前该类型的压裂液已在本油田应用近50井次,使用本发明的低温破胶压裂液后,增油效果明显得到改善,经济效益显著。
专利CN101531892A公布一种超低温超级胍胶压裂液,该专利公布以过硫酸钾、亚硝酸钠、双氧水为核心的三元破胶体系。同本发明相比,其破胶体系比较复杂,不易推广使用,其次亚硝酸钠、双氧水为化学危险品,对人身及环境会产生一些危害,而本发明采用单一的氯化亚铜作为激活剂,亚铜被氧化成铜离子后,对人体及环境影响比较小,用量低为0.0004%,添加方便易于推广使用。因此本发明同专利CN101531892A相比更具有先进性。
发明内容
本发明的目的是提供一种适于油气藏温度低于35℃的低渗透油气藏压裂的,能够提高压后压裂液破胶液的返排率,提高增油效果的超低温胍胶压裂液。
本发明所述的超低温胍胶压裂液是以水为溶剂,通过添加不同比例的化学添加剂配制出的压裂液。各成分按重量百分比如下:
羟丙基胍尔胶粉作为压裂液稠化剂,主要起增粘作用,最佳用量为0.3-0.4%;氯化钾为防膨剂,最佳用量根据油层条件进行选择;助排剂为氟碳链表面活性剂,最佳用量为1%;破乳剂为聚氧乙烯丙烯十八醇醚类,如本发明选用的PR—1破乳剂,由新疆克拉玛依市中太有限责任公司生产,最佳用量为0.5-2%;粘土稳定剂为季铵盐类防膨剂,本发明选用粘土稳定剂为XJHX-08,由新疆克拉玛依市新聚有限责任公司生产;杀菌剂为低碳醛类,如甲醛、戊二醛,最佳用量为0.03-0.08%;pH值调节剂为氢氧化钠,用量为0.01—0.03%;激活剂为氯化亚铜或氯化亚锡,本发明主要以氯化亚铜为主,最佳用量为0.002—0.008%%;交联剂为YGB有机硼交联剂,由新疆克拉玛依市采油工艺研究院生产,用量为0.1-0.3%;破胶剂为过硫酸铵,用量为0.04-0.1%。
本发明的主要特征为:
1、本发明的压裂液同现有专利技术配制的低温压裂液相比不同在于:激活剂使用方便、污染小。
2、本发明液体配制工艺简单,现场便于操作。
3、本发明提出的超低温胍胶压裂液体系具有良好的综合性能;
①、添加剂间具有良好的配伍性能,与地层流体也具有很好的配伍性;
②、具有良好的防膨效果,在未加粘土稳定剂的情况下,防膨率(针对粘土)可达70%;
③、破胶彻底,满足返排要求,破胶液粘度小于7mPa·s;
④、该压裂液体系满足15-35℃储层压裂施工要求。
附图说明
图1:T10269井施工曲线图。
具体实施方式
实施例1:
①15℃压裂液原液配方:0.3%HPGUR粉、10%KCL、0.5%XJHX-08、1%ZJ-07助排剂、0.3%KNF杀菌剂、1%PR-1、0.016%氢氧化钠、0.0004%gCuCL(氯化亚铜)。
②配制方法:取1000ml水置于1000ml容积的吴茵混调器中,加入100gKCL,搅拌溶解后加入3.0g羟丙基胍胶粉,搅拌2min溶解增粘,依次加入2ml XJHX-08、10ml ZJ-07助排剂、3ml KNF杀菌剂、10ml PR-1破乳剂、0.16g氢氧化钠+0.004g氯化亚铜,搅拌均匀,放置于1000ml烧杯中静置4小时,制成基液备用。
③交联液配方:2.5%YGB有机硼交联剂+2%过硫酸铵+0.1%氢氧化钠;取100ml水置于200ml容积的烧杯中,加入YGB有机硼交联剂2.5ml,加入过硫酸铵2g,搅拌均匀后再加入0.1g氢氧化钠,搅拌均匀制成交联液备用
④交联比:10:1
⑤压裂冻胶的制备:取基液100ml置于200ml容积烧杯中,加入10ml交联液,用玻璃棒搅拌,即可形成交联冻胶,交联时间为20s左右。在室温25℃下,使用RV-20型旋转粘度仪在170S-1剪切速率下,测得冻胶粘度变化如下:
超低温压裂液流变性能
压裂液冻胶4小时15℃下破胶液粘度≤7mPa·s。
实施例2:
①35℃压裂液原液配方:0.4%HPGUR粉、10%KCL、0.5%XJHX-08、1%ZJ-07助排剂、0.3%KNF杀菌剂、1%PR-1、0.02%氢氧化钠、0.0005%gCuCL(氯化亚铜)。
②配制方法:取1000ml水置于1000ml容积的吴茵混调器中,加入100gKCL,搅拌溶解后加入4.0g羟丙基胍胶粉,搅拌2min溶解增粘,依次加入2ml XJHX-08、10ml ZJ-07助排剂、3ml KNF杀菌剂、10ml PR-1破乳剂、0.2g氢氧化钠+0.004g氯化亚铜,搅拌均匀,放置于1000ml烧杯中静置4小时,制成基液备用。
③交联液配方:2%YGB有机硼交联剂+1%过硫酸铵+0.03%氢氧化钠;取100ml水置于200ml容积的烧杯中,加入YGB有机硼交联剂2g,加入过硫酸铵1g,搅拌均匀后再加入0.03g氢氧化钠,搅拌均匀制成交联液备用
④交联比:10:1
⑤压裂冻胶的制备:取基液100ml置于200ml容积烧杯中,加入10ml交联液,用玻璃棒搅拌,即可形成交联冻胶,交联时间为20s左右。在室温25℃下,使用RV-20型旋转粘度仪在170S-1剪切速率下,测得冻胶粘度变化如下:
超低温压裂液流变性能
压裂液冻胶4小时35℃下破胶液粘度≤5mPa·s。
实施例3:
T10269井(T2K1:738.5m-740.0m、743.5m-748.0m)属于克拉玛依组油藏克下组,位于克拉玛依市区以东15km,含油面积16.9km2,地质储量2058万吨。油藏夹持于克—乌断裂与北黑油山断裂之间,为一东南倾斜的单斜构造。主要含油层系岩性以砾岩、砂砾岩为主。表现为弱速敏、弱盐敏、中-强水敏。储层孔隙度平均为16.1%,渗透率平均为49×10-3μm2。为中孔—中低渗储层。克下组原始地层压力10.29MPa,油藏温度24.5°C,地层原油粘度7.2mPa.s。
采用常规压裂改造方式会造成有些薄层改造不好或完全没有改造的情况,所以为了尽量改造所有薄层,并减少作业次数以及对储层伤害,采用水力喷砂射孔压裂改造技术,这种工艺可以有效地进行自封隔对目的层进行压裂,并可一定程度上控制井筒附近裂缝起裂和延伸,容易产生主裂缝。
压裂液配方:
①25℃压裂液原液配方:
0.35%HPGUR粉+2%KCL+0.5%XJHX-08+1%ZJ-07助排剂+0.3%KNF杀菌剂+1%PR-1+0.016%氢氧化钠+0.0004%gCuCL(氯化亚铜)
②交联液配方:2.5YGB有机硼交联剂+2%过硫酸铵+0.01氢氧化钠;
施工曲线见附图1
压裂液破胶液情况记录
Claims (5)
2.按照权利要求1所述的超低温胍胶压裂液,其特征在于:压裂液原液的pH值9—11。
3.按照权利要求1所述的超低温胍胶压裂液,其特征在于:pH值调节剂为氢氧化钠,用量为0.02—0.03%。
4.按照权利要求1所述的超低温胍胶压裂液,其特征在于:交联剂为YGB有机硼交联剂,用量:1.5—2.5%。
5.按照权利要求1所述的超低温胍胶压裂液,其特征在于:破胶剂为过硫酸铵,用量:1.5—2%。
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