CN102925124B - One kind of temporary blocking oil compositions and application methods - Google Patents

One kind of temporary blocking oil compositions and application methods Download PDF

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CN102925124B
CN102925124B CN 201210387873 CN201210387873A CN102925124B CN 102925124 B CN102925124 B CN 102925124B CN 201210387873 CN201210387873 CN 201210387873 CN 201210387873 A CN201210387873 A CN 201210387873A CN 102925124 B CN102925124 B CN 102925124B
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parts
weight
water
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25a
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CN102925124A (en )
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张玉英
贾跃立
李晓龙
余庆中
孙永旭
陈雪梅
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中国石油化工股份有限公司
中国石油化工股份有限公司河南油田分公司石油工程技术研究院
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Abstract

本发明公开了一种油层暂堵组合物及其应用方法,该暂堵组合物包括2-20重量份的清洁转向剂XT-25A和10-20重量份的水杨酸钠。 The present invention discloses a temporary blocking oil composition and application method, the temporary blocking composition comprises 2-20 parts by weight of a cleaning agent steering XT-25A and 10-20 parts by weight of sodium salicylate. 还可以包括2~10重量份的醋酸、1~10重量份的氯化铵和80~97份的水。 It may further comprise from 2 to 10 parts by weight of acetic acid, 1 to 10 parts by weight of ammonium chloride and 80 to 97 parts water. 本发明的油层暂堵组合物,其中清洁转向剂XT-25A和水杨酸钠制成的暂堵液注入地层后,优先进入高渗透孔隙中,与地层水相遇后,暂堵液粘度立即上升,起到阻止和限制后续液体沿大孔道的水流通道渗流的目的。 Oil temporary blocking of the present invention the composition, wherein the temporary blocking solution made of a cleaning agent XT-25A steering sodium salicylate and injected into the formation, high permeability preferentially into the pores, the encounter with the formation water, the viscosity rises immediately temporary blocking solution , limiting purposes and play to prevent subsequent liquid flow in the large pore channels seepage. 若遇特大孔道或裂缝性地层,在注入暂堵液的基础上,将醋酸、氯化铵和水制成交联液注入地层中,交联液与暂堵液相遇发生交联反应形成高强度凝胶,可彻底封堵高孔高渗或裂缝性地层,防止改造液体的滤失,形成的高强度凝胶遇到烃类或者乙二醇单丁醚会在短时间内自动破胶。 In case of large pores or fractured formations, injection on the basis of the temporary blocking solution, the acetic acid, water and a crosslinked ammonium chloride solution into the formation, the crosslinking liquid and temporary plugging liquid encounters a crosslinking reaction occurs to form a high strength coagulation rubber, high porosity and permeability can completely block or fractured formation, transformation of the liquid to prevent fluid loss and high gel strength encountered glycol monobutyl ether, or hydrocarbons will automatically breaking in a short time.

Description

一种油层暂堵组合物及应用方法 One kind of temporary blocking oil compositions and application methods

技术领域 FIELD

[0001] 本发明涉及一种油层暂堵组合物,属于石油开采技术领域。 [0001] The present invention relates to a temporary blocking oil composition, belonging to the technical field of oil exploration.

背景技术 Background technique

[0002] 油田进入特高含水开发期后,主力油层大面积水淹,地层的剩余油主要分布在厚油层内的中低渗透层段中。 After the [0002] field into the development of high water cut, a large area of ​​the main reservoir flooding, the remaining oil in the formation is mainly distributed in the low permeability intervals within the reservoir thickness. 由于中低渗透层段孔喉细小,岩性致密,自然产能极低。 Since the low permeability layers bore section throat small, tight lithology, natural productivity is very low. 为提高油井产能,需要对储层进行酸化等油层改造措施。 In order to improve well productivity, the need for reservoirs reservoir stimulation measures acidification.

[0003] 常规酸化施工中酸液遵循阻力最小原则,有选择性地优先进入高孔高渗储层,低渗透层则因进酸很少,甚至不进酸而得不到应有的处理,这样,措施后往往出现储层产液量大幅度升高,而产油量大幅度下降的现象。 [0003] General Construction of the acid was acidified to follow the principle of minimum resistance, preferentially selective access to high porosity and permeability reservoirs, due to low permeability acid into little or no acid into proper treatment can not be obtained, in this way, the measures are often greatly increased reservoir fluid production, while oil production dropped significantly phenomenon. 因此,对处于特高含水开发期的油藏,采用常规的酸化改造措施,由于酸液不能有效进入预期目的层段,不仅不能有效提高和改善中低渗透层渗流能力,反而进一步加大了层间渗透率差异,导致酸化施工低效或无效。 Therefore, the reservoir in high water cut development period, using conventional acidification of reform measures can not be effective because the acid into the intended purpose intervals, not only can not effectively enhance and improve the flow capacity of the low-permeability layer, but further increase the layer the difference between the permeability, resulting in acidizing inefficient or ineffective.

发明内容 SUMMARY

[0004] 本发明的目的是提供一种油层暂堵组合物。 [0004] The object of the present invention is to provide a temporary blocking oil composition.

[0005] 为了实现以上目的,本发明所采用的技术方案是:一种油层暂堵组合物,包括2-20重量份的清洁转向剂XT-25A和10-20重量份的水杨酸钠。 [0005] To achieve the above object, the technical solution employed in the present invention is: A temporary blocking oil composition, comprising 2-20 parts by weight of a cleaning agent steering XT-25A and 10-20 parts by weight of sodium salicylate.

[0006] 所述油层暂堵组合物还包括2~10重量份的醋酸、1~10重量份的氯化铵和80~ 97份的水。 The [0006] oil composition further comprises temporary blocking of 2 to 10 parts by weight of acetic acid, 1 to 10 parts by weight of ammonium chloride and 80 to 97 parts water.

[0007] 所述醋酸、氯化铵和水的总量为100份。 The [0007] acetate, ammonium chloride, and the total amount of water was 100 parts.

[0008] 本发明的油层暂堵组合物,采用配方比例的清洁转向剂XT-25A和水杨酸钠组成, 使用时将两者混合溶液制成暂堵液注入到地层中,与水相遇后粘度立即上升,粘度可升至20~200mpa. s,起到阻止和限制随后液体继续沿大孔道的水流通道渗流,达到改变液体流进的方向的目的。 After the [0008] present invention, temporary blocking oil composition, the proportion of cleaning formulation employed XT-25A, and sodium salicylate steering agent composition, when prepared using a mixed solution of the two diverting fluid is injected into the formation, meet with water immediate increase in viscosity, the viscosity can be increased to 20 ~ 200mpa. s, and limit subsequent play to prevent fluid flow to continue along the large pore flow channel, to change the direction of flow of liquid into the object. 随后加入的酸液等油层改造流体,就能够流入堵塞的渗油孔道解除堵塞, 恢复和提高油井产量或者注水井注水量。 Fluid and other reservoir stimulation followed by the addition of acid, it can flow into the clogged pore permeability relieve congestion, restore and enhance oil production injection wells or water injection. 具体的应用方法包括如下步骤: Specific applications comprising the steps of:

[0009] 1)取2~20份清洁转向剂XT-25A,加入10~20份的水杨酸钠搅拌直至全部溶解,制得暂堵液; [0009] 1) 2 ~ 20 parts by steering the cleaning agent XT-25A, and 10 to 20 parts of sodium salicylate is stirred until complete dissolution, to obtain temporary blocking solution;

[0010] 2)先在井筒中挤入清洁转向剂XT-25A作为隔离液,再将暂堵液挤入到井筒中,接着挤入清洁转向剂XT-25A作为隔离液,最后加水顶替至目的层,关井反应; [0010] 2) the first extruded in a wellbore cleaning agent steering XT-25A as a spacer fluid, and then extruded into temporary plugging fluid into the wellbore, and then extruded into a cleaning agent steering XT-25A as a spacer fluid, and finally adding water to replace the object layer, shut the reaction;

[0011] 3)反应后即可进行后续施工。 To follow-up after construction [0011] 3) reaction.

[0012] 步骤2)所述关井反应时间为30~60min。 [0012] Step 2) the reaction time was shut 30 ~ 60min.

[0013] 当遇到一般的渗透率地层时,只需要加入堵水液即可实现暂堵,醋酸、氯化铵和水可以不加。 [0013] When the permeability of the formation encountered in general, only need to add temporary plugging plugging solution can be realized, acetate, chloride, and water may not be added. 若遇特大孔道或裂缝性地层,可在采用清洁转向剂XT-25A和水杨酸钠的基础上,再采用配方量的醋酸、氯化铵和水制成交联液,交联液遇到清洁转向剂XT-25A和水杨酸钠制成的暂堵液则发生交联反应形成高强度凝胶,粘度可升至1000~2000mpa. s,可彻底封堵高孔高渗或裂缝性地层,防止改造液体的滤失,阻止改造液体进入高渗透地层,迫使后续液体转向进入低渗透地层,实现储层均匀改造,提高非均质储层改造效果。 In case of large pores or fractured, can be employed in the steering based cleaning agent and XT-25A on sodium salicylate, and then use the formula amount of acetic acid, water and a crosslinked ammonium chloride solution, crosslinking liquid face cleaning hydraulic steering temporary blocking agent and sodium salicylate XT-25A made of a cross-linking reaction occurs to form a high gel strength, viscosity can be raised to 1000 ~ 2000mpa. s, high porosity and permeability can completely block or fractured formations, transformation of the liquid to prevent fluid loss, preventing the transformation of the liquid into the high permeability formation, forcing the fluid diverted into the subsequent low permeability formation, transformation of the reservoir to achieve a uniform, heterogeneous reservoirs improving effect transformation. 施工结束后,生成的高粘度物质或者凝胶,遇到地层回流的烃类液体则自动破胶,或者挤入适量的乙二醇单丁醚到作用层位提升破胶效果,破胶后液体粘度与水粘度接近,对地层无任何伤害。 After construction, the resulting highly viscous or gelled substances encountered hydrocarbon liquid formation is refluxed for automatic breaking, or squeeze to an appropriate amount of ethylene glycol monobutyl ether to enhance the effect of the breaking effect of the horizon, after breaking the liquid gel viscosity and viscosity of water close to the formation without any harm.

具体实施方式 Detailed ways

[0014] 实施例1~10中涉及的原料,例如清洁转向剂XT-25A,水杨酸钠,醋酸,氯化铵均为市售产品,其中清洁转向剂XT-25A为新乡市玄泰实业有限公司出售的工业品。 [0014] The starting material of Example 1 to 10 relates to the embodiment, for example, a cleaning agent, XT-25A steering, sodium salicylate, acetic acid, ammonium chloride are commercially available products, wherein the cleaning agent XT-25A of the steering Xinxiang Tai Yuen Industrial Limited industrial products sold.

[0015] 实施例1 [0015] Example 1

[0016] 本实施例的油层暂堵组合物,包括67重量份清洁转向剂XT-25A,33重量份水杨酸钠。 [0016] Example embodiment of the present temporary blocking oil composition comprising 67 parts by weight of the cleaning agent steering XT-25A, 33 parts by weight sodium salicylate.

[0017] 实施例2 [0017] Example 2

[0018] 本实施例的油层暂堵组合物,包括67重量份清洁转向剂XT-25A,33重量份水杨酸钠,2重量份的醋酸,1重量份的氯化铵和97份水。 [0018] Example embodiment of the present temporary blocking oil composition comprising 67 parts by weight of the cleaning agent steering XT-25A, 33 parts by weight sodium salicylate, 2 parts by weight of acetic acid, 1 part by weight of ammonium chloride and 97 parts of water.

[0019] 实施例3 [0019] Example 3

[0020] 本实施例的油层暂堵组合物,包括50重量份清洁转向剂XT-25A,50重量份水杨酸钠。 [0020] Example embodiment of the present temporary blocking oil composition comprising 50 parts by weight of the cleaning agent steering XT-25A, 50 parts by weight sodium salicylate.

[0021] 实施例4 [0021] Example 4

[0022] 本实施例的油层暂堵组合物,包括50重量份清洁转向剂XT-25A,50重量份水杨酸钠,7重量份的醋酸,4重量份的氯化铵和89份的水。 [0022] Example embodiment of the present temporary blocking oil composition comprising 50 parts by weight of the cleaning agent steering XT-25A, 50 parts by weight sodium salicylate, 7 parts by weight of acetic acid, 4 parts by weight of ammonium chloride and 89 parts of water .

[0023] 实施例5 [0023] Example 5

[0024] 本实施例的油层暂堵组合物,包括43重量份清洁转向剂XT-25A,57重量份水杨酸钠。 [0024] In the present embodiment, temporary blocking oil composition comprising 43 parts by weight of the cleaning agent steering XT-25A, 57 parts by weight sodium salicylate.

[0025] 实施例6 [0025] Example 6

[0026] 本实施例的油层暂堵组合物,包括43重量份清洁转向剂XT-25A,57重量份水杨酸钠,8重量份的醋酸,7重量份的氯化铵和85份的水。 [0026] Example embodiment of the present temporary blocking oil composition comprising 43 parts by weight of the cleaning agent steering XT-25A, 57 parts by weight sodium salicylate, 8 parts by weight of acetic acid, 7 parts by weight of ammonium chloride and 85 parts of water .

[0027] 实施例7 [0027] Example 7

[0028] 本实施例的油层暂堵组合物,包括30重量份清洁转向剂XT-25A,70重量份水杨酸钠。 [0028] Example embodiment of the present temporary blocking oil composition comprising 30 parts by weight of the cleaning agent steering XT-25A, 70 parts by weight sodium salicylate.

[0029] 实施例8 [0029] Example 8

[0030] 本实施例的油层暂堵组合物,包括30重量份清洁转向剂XT-25A,70重量份水杨酸钠,10重量份的醋酸,10重量份的氯化铵和80份的水。 [0030] Example embodiment of the present temporary blocking oil composition comprising 30 parts by weight of the cleaning agent steering XT-25A, 70 parts by weight sodium salicylate, 10 parts by weight of acetic acid, 10 parts by weight of ammonium chloride and 80 parts of water .

[0031] 实施例9 [0031] Example 9

[0032] 本实施例为油层暂堵组合物的应用方法,包括以下步骤: [0032] The present embodiment is a method of temporary plugging oil composition, comprising the steps of:

[0033] 1)取配方量的清洁转向剂XT-25A(液体),加入配方量的水杨酸钠搅拌直至全部溶解,制得暂堵液; [0033] 1) Take the amount of cleaning formulation diverter XT-25A (a liquid), formula amount of sodium salicylate was added with stirring until completely dissolved, to obtain temporary blocking solution;

[0034] 2)先在井筒中挤入0.3m3清洁转向剂XT-25A作为隔离液,再将暂堵液挤入到井筒中,接着挤入〇. 3m3清洁转向剂XT-25A作为隔离液,最后用水将暂堵液顶替到目的层,关井反应30min; [0034] 2) to squeeze the steering 0.3m3 cleaning agent XT-25A as a spacer fluid in the wellbore, and then extruded into temporary plugging fluid into the wellbore, and then squeeze into the square. 3m3 steering cleaning agent as a spacer fluid XT-25A, Finally, the water was replaced to a temporary blocking layer object, shut the reaction for 30 min;

[0035] 3)反应后即可进行后续施工。 To follow-up after construction [0035] 3) reaction.

[0036] 本实施例可以针对一般的渗透率地层实施应用,具体组分的用量可以如实施例1、 3、5、7,在此不再赘述。 [0036] This embodiment can be implemented for general applications permeability of the formation, the amount of the specific components may be as described in Example 1, 3,5,7, are not repeated here.

[0037] 实施例10 [0037] Example 10

[0038] 本实施例为油层暂堵组合物的应用方法,包括以下步骤: [0038] The present embodiment is a method of temporary plugging oil composition, comprising the steps of:

[0039] 1)取配方量的清洁转向剂XT-25A (液体),加入配方量的水杨酸钠搅拌直至全部溶解,制得暂堵液;取配方量的醋酸、氯化铵和水混合搅拌直至全部溶解,制得交联液; [0039] 1) Take the amount of cleaning formulation diverter XT-25A (a liquid), formula amount of sodium salicylate was added with stirring until completely dissolved, to obtain temporary blocking solution; taken formula amount of acetic acid, ammonium chloride and water stirring until completely dissolved, to obtain crosslinking liquid;

[0040] 2)先在井筒中挤入0. 3m3清洁转向剂XT-25A作为隔离液,再将暂堵液挤入到井筒中,接着挤入〇. 3m3清洁转向剂XT-25A作为隔离液,防止暂堵液和交联液在井筒中相遇形成高强度凝胶,随后挤入交联液,最后用水将暂堵液和交联液顶替到目的层,关井反应60min ; [0040] 2) to squeeze the steering 0. 3m3 cleaning agent XT-25A as a spacer fluid in the wellbore, and then extruded into temporary plugging fluid into the wellbore, and then squeeze into the square. 3m3 steering cleaning agent as a spacer fluid XT-25A , to prevent temporary blocking solution and the crosslinking liquid meet in a wellbore to form a high strength gel, and then extruded into the crosslinking solution, finally with water and diverting fluid to displace object crosslinking liquid layer, the reaction shut 60min;

[0041] 3)反应后即可进行后续施工。 To follow-up after construction [0041] 3) reaction.

[0042] 本实施例可以针对特大孔道或裂缝性地层实施应用,具体组分的用量可以如实施例2、4、6、8,在此不再赘述。 [0042] The present embodiment may be directed to the formation of large pores, or fracture application embodiment, the amount of the specific components may be as in Example 2,4,6,8 embodiment, not described herein again.

[0043] 实验例 [0043] Experimental Example

[0044] 下面是本发明暂堵剂室内评价实验: [0044] Next, the present invention is a diverting agent experimental lab evaluation:

[0045] 1、采用毛细管粘度计针对实施例1~8并结合实施例9、10进行测试,测试的内容如下: [0045] 1, using a capillary viscometer for Examples 1 to 8 and Examples 9 and 10 were tested in combination, the content of the test are as follows:

[0046] 实施例1、3、5、7的组合物复配后制成的暂堵液的初始粘度(初始粘度),然后暂堵液遇地层水后粘度(遇水后粘度);继续加入实施例2、4、6、8中由醋酸、氯化铵和水制成的交联液后的粘度(交联后粘度);凝胶破胶后粘度(破胶后粘度)。 [0046] After temporary plugging liquid prepared after initial viscosity of the composition of Example 1,3,5,7 compound (initial viscosity) embodiment, and in case of temporary blocking formation water solution viscosity (viscosity after water); continue to add 2,4,6,8 viscosity (viscosity after cross-linking) after crosslinking was made from acetic acid, ammonium chloride and water Example; gel after gel breaking viscosity (viscosity after gel breaking). 测试结果见表1, The test results are shown in Table 1,

[0047] 表1暂堵剂粘度测试表 [0047] Table 1 Viscosity temporary blocking test table

[0048] [0048]

Figure CN102925124BD00051

[0049] 2、暂堵剂的分流转向试验评价: [0049] 2, a steering shunt temporary blocking agent Test Evaluation:

[0050] 试验在岩心流动实验仪上完成,试验方法:同时并联连接低渗、高渗两块岩芯,排量始终控制在lml/min。 [0050] The core flow tests on the completed experimental apparatus, test method: simultaneous parallel connection hypotonic, hypertonic two cores, displacement always controlled at lml / min. 试验步骤为: Test steps:

[0051 ] ①驱替模拟地层水(2~3%NHC14溶液),记录测得岩心初始渗透率K。 [0051] ① displacing simulated formation water (2 ~ 3% NHC14 solution), recording an initial permeability of the core was measured K. ;

[0052] ②注入暂堵剂,停栗反应30min,观察岩芯两端压差变化; [0052] ② temporary blocking agent injection, stopping the reaction Li 30min, observed pressure changes at both ends of the core;

[0053] ③按常规酸化程序驱替酸液,停栗反应30min ; [0053] ③ a conventional acidification procedure flooding acid, Li stop the reaction for 30 min;

[0054] ④驱替模拟地层水,记录测得岩心酸化后最终渗透率K1。 [0054] ④ displacing simulated formation water, record the final measured core permeability K1 after acidification.

[0055] 计算两块岩芯渗透率增大倍比。 [0055] The calculated two-fold increased permeability than the core.

[0056] 表2岩心流动实验前后渗透率的变化 [0056] Table 2 before and after the change in permeability core flow experiment

[0057] [0057]

Figure CN102925124BD00061

[0058] 由表2试验显示:在注入酸液反应一段时间后,高渗透层岩芯完全被封堵,酸液转入低渗透岩芯,四组并联岩芯试验,低渗透岩芯渗透率都得到了一定程度的改善,由此可以看出,暂堵剂的转向效果是非常明显的,说明该暂堵剂具有低滤失、低伤害、强分流的特性。 [0058] Table 2 show test: After a period of reaction injection acid, high permeability core is completely blocked, into the low permeability cores acid, four parallel test core, permeability of low permeability cores have been improved to some extent, it can be seen, the temporary blocking agent steering effect is very significant, indicating that the temporary blocking agent having a low fluid loss, low damage, strong shunt characteristics.

[0059] 3、注水井试验 [0059] 3, injection wells test

[0060]某注水井,射开层位W 2. 3, W 151. 152. W 18,砂厚18.6m。 [0060] a water injection well, the exit open horizon W 2. 3, W 151. 152. W 18, thick sand 18.6m. 全井分W 2. 3/W 15. 18 两段注水,各段配注为50/20m3/d。 Whole well divided W 2. 3 / W 15. 18 two-stage injection, injection with segments of 50 / 20m3 / d. 目前在栗压16. 4MPa,油压15MPa的压力下,全井吸水57m3/d,其中W 15. W 18不吸水。 Li pressure currently 16. 4MPa, the hydraulic pressure of 15MPa, all wells absorbent 57m3 / d, where W 15. W 18 non-absorbent. 该井最后一次酸化为2007. 9. 24-29日酸化W 2. 3/15. 18, 酸化后全井吸水合格,日注水量12 / 80m3/d,目前W 15. 18不吸水。 The last well was acidified to 2007. 9. The acidified 24-29 W 2. 3/15. 18, after acidification whole well qualified absorbent, water injection Day 12 / 80m3 / d, the current W 15. 18 non-absorbent.

[0061] 该井现场施工,注入暂堵剂后施工压力由18MPa上升致27MPa,随后进行常规的酸化施工,施工压力由27MPa降至22MPa。 [0061] The well-site construction, after the injection operation pressure by a temporary blocking agent 18MPa 27MPa induced increase, followed by acidification of conventional construction, the construction of the pressure reduced to 27MPa 22MPa. 措施后对W 15. 18进行测试,在油压16Mpa下,日注112m3,投1. 8mm水咀控制注水后,在油压15MPa下,日注18m3/d,该井累计增注2316m3,目前仍继续有效。 After W 15. 18 after the test measures oil pressure at 16Mpa, injection day 112m3, 8mm cast 1. Tap water control, the oil pressure at 15MPa, daily injection 18m3 / d, the well integrated by injection 2316m3, the current remain in force. 该井现场施工取得了良好的分流转向酸化效果。 The well site construction made a good diversion turned acidification effect.

Claims (5)

  1. 1. 一种油层暂堵组合物,其特征在于:包括2-20重量份的清洁转向剂XT-25A和10-20 重量份的水杨酸钠; 还包括2~10重量份的醋酸、1~10重量份的氯化铵和80~97份的水; 其中清洁转向剂XT-25A为新乡市玄泰实业有限公司出售的工业品。 A diverting oil composition, characterized by: 2-20 parts by weight comprising a cleaning agent steering XT-25A and 10-20 parts by weight sodium salicylate; further comprising 2 to 10 parts by weight of acetic acid, 1 to 10 parts by weight of ammonium chloride and 80 to 97 parts water; wherein the cleaning agent XT-25A of the steering Xinxiang Tai Yuen Industrial Co., Ltd. sold industrial products.
  2. 2. 根据权利要求1所述的油层暂堵组合物,其特征在于:所述醋酸、氯化铵和水的总量为100份。 2. The reservoir according to claim 1 diverting composition, characterized in that: the acetate, ammonium chloride, and the total amount of water was 100 parts.
  3. 3. -种如权利要求1所述油层暂堵组合物的应用方法,其特征在于:包括以下步骤: 1) 取2~20份清洁转向剂XT-25A,加入10~20份的水杨酸钠搅拌直至全部溶解,制得暂堵液; 2) 先在井筒中挤入清洁转向剂XT-25A作为隔离液,再将暂堵液挤入到井筒中,接着挤入清洁转向剂XT-25A作为隔离液,向井筒中加入由2~10重量份的醋酸、1~10重量份的氯化铵和80~97份的水混合搅拌均匀制成的交联液,最后加水顶替至目的层,关井反应; 3) 反应后即可进行后续施工。 Comprising the steps of:: 1) 2 ~ 20 parts by steering the cleaning agent XT-25A, and 10 to 20 parts salicylic acid - 3. The seed oil as claimed in claim 1 temporary plugging of a composition, characterized in that the required stirred until the sodium completely dissolved, to obtain temporary blocking solution; 2) to squeeze the cleaning agent in the wellbore steering XT-25A as a spacer fluid, and then extruded into temporary plugging fluid into the wellbore, and then extruded into a cleaning agent steering XT-25A as the spacer fluid from 2 to 10 parts by weight of acetic acid, 1 to 10 parts by weight of ammonium chloride and 80 to 97 parts of water were mixed was uniformly stirred crosslinked prepared was added to the wellbore, and finally adding water to replace the object layer, reaction shut; 3) to the subsequent reaction after construction.
  4. 4. 根据权利要求3所述的应用方法,其特征在于:所述醋酸、氯化铵和水的总量为100 份。 4. The application of the method according to claim 3, wherein: the acetate, ammonium chloride, and the total amount of water was 100 parts.
  5. 5. 根据权利要求3~4任一项所述的应用方法,其特征在于:步骤2)所述关井反应时间为30~60min。 The application of the method according to any one of claims 3 to 4, wherein: the step 2) the reaction time was shut 30 ~ 60min.
CN 201210387873 2012-10-12 2012-10-12 One kind of temporary blocking oil compositions and application methods CN102925124B (en)

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