技术领域technical field
本发明属于完井工程技术领域，具体涉及一种适用于完井过程中稳定井壁、防止粘土膨胀、消除储层伤害的钻井井壁稳定剂。The invention belongs to the technical field of well completion engineering, and in particular relates to a drilling well wall stabilizer suitable for stabilizing the well wall, preventing clay expansion and eliminating reservoir damage during the well completion process.
背景技术Background technique
油田在钻井过程中均使用钻井液用于清洁和冷却钻头，以及用于携带由钻头捣松的岩屑、块石、泥土或沙子，加之钻井液还可减少地层破坏，通过向钻井孔壁加衬或涂抹以阻止塌陷和通过用钻井液来阻止液体和固体颗粒侵入可渗透地层来实现。Oilfields use drilling fluid to clean and cool the drill bit during the drilling process, as well as to carry cuttings, rocks, soil or sand loosened by the drill bit. In addition, the drilling fluid can also reduce formation damage. Lining or smearing to prevent subsidence and by using drilling fluids to prevent the invasion of liquid and solid particles into permeable formations.
然而许多地区，页岩在有水的情况下，对水敏感不稳定，从而遇水膨胀或分散，结果钻屑破碎为较小的粒子，此时要将破碎的粒子从循环的钻井液中分离出去，就十分困难且费用高，并且所钻的井壁不稳定。特别处于地层深处的岩石，受有上覆地层压力、水平方向的应力及地层孔隙压力的作用，在井眼钻开前，地下岩层处于应力平衡状态；井眼被钻开后，井内钻井液液柱压力取代了所钻岩层原先对井壁的支撑，破坏了地层原有的应力平衡，引起井眼周围应力的重新分布。若井壁周围岩石所受应力超过岩石本身的强度，就会产生剪切破坏，脆性地层产生塌陷，引起塑性地层缩径，造成井壁不稳定。However, in many areas, shale is sensitive to water and is unstable in the presence of water, so it swells or disperses when it encounters water. As a result, the cuttings are broken into smaller particles. At this time, the broken particles must be separated from the circulating drilling fluid. It is very difficult and expensive to go out, and the well wall drilled is unstable. Especially the rocks deep in the formation are affected by the pressure of the overlying formation, the stress in the horizontal direction and the pore pressure of the formation. Before the wellbore is drilled, the underground rock is in a state of stress balance; The pressure of the liquid column replaces the original support of the drilled rock formation to the wellbore wall, destroys the original stress balance of the formation, and causes the stress redistribution around the wellbore. If the stress on the rock around the well wall exceeds the strength of the rock itself, shear failure will occur, the brittle formation will collapse, the plastic formation will shrink, and the well wall will be unstable.
完井工程是为油井投产做准备的前道工程，射孔前要用清洁盐水完井液将钻井液多储层井段替出，射孔时采用这种清洁无固相的液体会增加油井产量，完井液即要满足各种工艺要求，还要切实做到保护油层，防止固相或钻屑堵塞喉道，又可防止滤液侵入油层与储层成分互相作用引起粘土膨胀、微粒运移等作用堵塞油层或油层中的流体反应产生沉淀堵塞油层。目前应用较多的为溴盐、钙盐完井液，而溴盐、钙盐完井液易与地下流体包括石油、天然气、地下水、洗井用海水、二氧化碳等相互作用产生沉淀，对储层伤害较大。The well completion project is the preparatory project for the oil well to be put into production. Before perforating, it is necessary to use clean brine completion fluid to replace the multi-reservoir well section of the drilling fluid. The use of this clean and solid-free liquid during perforation will increase the The completion fluid must not only meet various technical requirements, but also effectively protect the oil layer, prevent solid phase or cuttings from clogging the throat, and prevent the filtrate from invading the oil layer and interacting with the reservoir components to cause clay swelling and particle migration. And so on to block the oil layer or the fluid reaction in the oil layer to produce sediment to block the oil layer. At present, bromine salt and calcium salt completion fluids are widely used, and bromine salt and calcium salt completion fluids are easy to interact with underground fluids, including oil, natural gas, groundwater, seawater for well washing, carbon dioxide, etc. The damage is greater.
发明内容Contents of the invention
本发明所要解决的技术问题在于针对上述现有技术中的不足，提供一种用于完井过程中，起稳定井壁、防止粘土膨胀和消除储层伤害作用的钻井井壁稳定剂。The technical problem to be solved by the present invention is to provide a drilling well wall stabilizer used in the well completion process to stabilize the well wall, prevent clay expansion and eliminate reservoir damage.
为解决上述技术问题，本发明采用的技术方案是：一种钻井井壁稳定剂，其特征在于由以下重量份的原料组成：二甲基2烯丙基氯化铵20-35份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物2-5份，非离子表面活性剂OP-10 1-5份，非离子氟表面活性剂1-2份，纤维素酶1-3份，氯化钾1-5份，水45-74份；所述非离子氟表面活性剂为含氟烷基乙氧基醚醇，所述二甲基2烯丙基氯化铵-丙烯酰胺聚合物的分子量为5万-100万。In order to solve the above-mentioned technical problems, the technical solution adopted in the present invention is: a drilling hole wall stabilizer, which is characterized in that it consists of the following raw materials in parts by weight: 20-35 parts of dimethyl 2 allyl ammonium chloride, dimethyl 2-5 parts of allyl ammonium chloride-acrylamide polymer, 1-5 parts of non-ionic surfactant OP-10, 1-2 parts of non-ionic fluorosurfactant, 1-3 parts of cellulase, 1-5 parts of potassium chloride, 45-74 parts of water; the nonionic fluorosurfactant is fluorine-containing alkyl ethoxy ether alcohol, and the dimethyl 2 allyl ammonium chloride-acrylamide polymer The molecular weight is 50,000-1 million.
本发明的优选技术方案是：一种钻井井壁稳定剂，其特征在于由以下重量份的原料组成：二甲基2烯丙基氯化铵35份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物3份，非离子表面活性剂OP-10 3份，非离子氟表面活性剂2份，纤维素酶2份，氯化钾5份，水50份；所述非离子氟表面活性剂为含氟烷基乙氧基醚醇。The preferred technical solution of the present invention is: a drilling hole wall stabilizer, characterized in that it consists of the following raw materials in parts by weight: 35 parts of dimethyl 2 allyl ammonium chloride, dimethyl 2 allyl ammonium chloride - 3 parts of acrylamide polymer, 3 parts of nonionic surfactant OP-10, 2 parts of nonionic fluorosurfactant, 2 parts of cellulase, 5 parts of potassium chloride, and 50 parts of water; the nonionic fluorine surface The active agent is a fluorine-containing alkyl ethoxy ether alcohol.
其制备方法为：按上述重量份称取二甲基2烯丙基氯化铵、二甲基2烯丙基氯化铵-丙烯酰胺聚合物、非离子表面活性剂OP-10、非离子氟表面活性剂、纤维素酶、氯化钾和水，混合后充分搅拌，使各组分混合均匀，即得成品井壁稳定剂。Its preparation method is: weigh dimethyl 2 allyl ammonium chloride, dimethyl 2 allyl ammonium chloride-acrylamide polymer, nonionic surfactant OP-10, nonionic fluorine Surfactant, cellulase, potassium chloride and water are mixed and then fully stirred, so that all components are mixed evenly, and the finished well wall stabilizer is obtained.
上述重量份可为克、千克、吨等重量单位。The above weight parts can be weight units such as gram, kilogram, ton.
本发明所依据的技术原理：本发明以二甲基2烯丙基氯化铵(DMDAAC)、二甲基2烯丙基氯化铵-丙烯酰胺(AM)聚合物(分子量为5-100万)、表面活性剂等为主要原料，其中含有的分子沉积膜成分沉积在储层表面形成一定厚度的分子膜，可吸附在页岩表面，封堵井壁孔隙和微缝，阻止滤液进入地层，减少压力穿透，减小页岩与水的接触而起稳定井壁的作用。The technical principle on which the present invention is based: the present invention uses dimethyl 2 allyl ammonium chloride (DMDAAC), dimethyl 2 allyl ammonium chloride-acrylamide (AM) polymer (molecular weight is 5-1,000,000 ), surfactants, etc. are the main raw materials, and the molecular deposition film components contained in it are deposited on the surface of the reservoir to form a molecular film of a certain thickness, which can be adsorbed on the surface of shale, plug the pores and micro-fractures of the well wall, and prevent the filtrate from entering the formation. Reduce pressure penetration and reduce the contact between shale and water to stabilize the well wall.
本发明与现有技术相比具有以下优点：Compared with the prior art, the present invention has the following advantages:
1、本发明可以针对不同的岩层缝隙，通过参与岩层的井壁泥饼形成，封堵孔隙，使井壁具有柔韧性和可伸缩性，有明显的降低泥饼润滑系数，起到井壁稳定作用。1. The present invention can be aimed at the gaps of different rock formations, by participating in the formation of mud cake on the well wall of the rock formation, plugging the pores, making the well wall flexible and scalable, significantly reducing the lubricating coefficient of the mud cake, and stabilizing the well wall effect.
2、具有突出的润滑性能和回弹作用，特别在定向井、丛式井钻井中遭遇大面积硬接触点时，可有效的降低摩阻、降低扭矩、防止卡钻。2. It has outstanding lubricating performance and rebound effect, especially when large-area hard contact points are encountered in directional well and cluster well drilling, it can effectively reduce friction, reduce torque, and prevent pipe sticking.
3、由于其特殊组分，具有防漏失、增强井壁稳定性的作用。3. Due to its special components, it has the functions of preventing leakage and enhancing the stability of the well wall.
4、无荧光、无毒、无磨蚀作用。4. No fluorescence, non-toxic, non-abrasive.
5、有利于改善钻井液性能，具有降低粘度、降低失水量、改善泥饼等效果。5. It is beneficial to improve the performance of drilling fluid, and has the effects of reducing viscosity, reducing water loss, and improving mud cake.
6、使用本发明，使得钻井施工工艺简单。6. Using the present invention makes the drilling construction process simple.
7、与其它无机盐具有良好的协同稳定作用。7. It has good synergistic stabilizing effect with other inorganic salts.
8、使用本发明完井，一般可增产30％左右。8. By using the present invention to complete the well, the production can generally be increased by about 30%.
下面通过实施例，对本发明的技术方案做进一步的详细描述。The technical solutions of the present invention will be described in further detail below through examples.
具体实施方式Detailed ways
以下实施例的各原料均按重量份计。The raw materials in the following examples are all in parts by weight.
实施例1Example 1
本实施例的原料组成为：二甲基2烯丙基氯化铵30份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物3份，非离子表面活性剂OP-10 3份，非离子氟表面活性剂2份，纤维素酶2份，氯化钾3份，水57份；所述二甲基2烯丙基氯化铵-丙烯酰胺聚合物的分子量为40万，所述非离子氟表面活性剂为含氟烷基乙氧基醚醇非离子表面活性剂SUNF-01，所述纤维素酶为纤维素酶SUNWEE-010。The raw materials of this embodiment consist of: 30 parts of dimethyl 2 allyl ammonium chloride, 3 parts of dimethyl 2 allyl ammonium chloride-acrylamide polymer, 3 parts of nonionic surfactant OP-10, 2 parts of nonionic fluorosurfactant, 2 parts of cellulase, 3 parts of potassium chloride, and 57 parts of water; the molecular weight of the dimethyl 2 allyl ammonium chloride-acrylamide polymer is 400,000, and the The nonionic fluorosurfactant is SUNF-01, a fluorine-containing alkyl ethoxy ether alcohol nonionic surfactant, and the cellulase is cellulase SUNWEE-010.
其制备方法为：按上述重量份称取二甲基2烯丙基氯化铵、二甲基2烯丙基氯化铵-丙烯酰胺聚合物、非离子表面活性剂OP-10、含氟烷基乙氧基醚醇非离子氟表面活性剂SUNF-01、纤维素酶SUNWEE-010、氯化钾和水，混合后充分搅拌，使各组分混合均匀，即得成品井壁稳定剂。Its preparation method is: weigh dimethyl 2 allyl ammonium chloride, dimethyl 2 allyl ammonium chloride-acrylamide polymer, nonionic surfactant OP-10, Ethoxyl ether alcohol non-ionic fluorosurfactant SUNF-01, cellulase SUNWEE-010, potassium chloride and water, after mixing, fully stir, so that all components are mixed evenly, and the finished well wall stabilizer is obtained.
实施例2Example 2
本实施例的原料组成为：二甲基2烯丙基氯化铵20份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物2份，非离子表面活性剂OP-10 1份，非离子氟表面活性剂2份，纤维素酶3份，氯化钾5份，水67份；所述二甲基2烯丙基氯化铵-丙烯酰胺聚合物的分子量为35万，所述非离子氟表面活性剂为含氟烷基乙氧基醚醇非离子表面活性剂SUNF-01，所述纤维素酶为纤维素酶SUNWEE-010。The raw material composition of this embodiment is: 20 parts of dimethyl 2 allyl ammonium chloride, 2 parts of dimethyl 2 allyl ammonium chloride-acrylamide polymer, 1 part of nonionic surfactant OP-10, 2 parts of nonionic fluorosurfactant, 3 parts of cellulase, 5 parts of potassium chloride, and 67 parts of water; the molecular weight of the dimethyl 2 allyl ammonium chloride-acrylamide polymer is 350,000, and the The nonionic fluorosurfactant is SUNF-01, a fluorine-containing alkyl ethoxy ether alcohol nonionic surfactant, and the cellulase is cellulase SUNWEE-010.
本实施例的制备方法同实施例1。The preparation method of this embodiment is the same as that of Example 1.
实施例3Example 3
本实施例的原料组成为：二甲基2烯丙基氯化铵35份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物5份，非离子表面活性剂OP-10 5份，非离子氟表面活性剂1份，纤维素酶1份，氯化钾5份，水48份；所述二甲基2烯丙基氯化铵-丙烯酰胺聚合物的分子量为45万，所述非离子氟表面活性剂为含氟烷基乙氧基醚醇非离子表面活性剂SUNF-01，所述纤维素酶为纤维素酶SUNWEE-010。The raw materials of this embodiment consist of: 35 parts of dimethyl 2 allyl ammonium chloride, 5 parts of dimethyl 2 allyl ammonium chloride-acrylamide polymer, 5 parts of nonionic surfactant OP-10, 1 part of nonionic fluorosurfactant, 1 part of cellulase, 5 parts of potassium chloride, and 48 parts of water; the molecular weight of the dimethyl 2 allyl ammonium chloride-acrylamide polymer is 450,000, and the The nonionic fluorosurfactant is SUNF-01, a fluorine-containing alkyl ethoxy ether alcohol nonionic surfactant, and the cellulase is cellulase SUNWEE-010.
本实施例的制备方法同实施例1。The preparation method of this embodiment is the same as that of Example 1.
实施例4Example 4
本实施例的原料组成为：二甲基2烯丙基氯化铵25份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物4份，非离子表面活性剂OP-10 4份，非离子氟表面活性剂1份，纤维素酶2份，氯化钾5份，水59份；所述二甲基2烯丙基氯化铵-丙烯酰胺聚合物的分子量为50万，所述非离子氟表面活性剂为含氟烷基乙氧基醚醇非离子表面活性剂SUNF-01，所述纤维素酶为纤维素酶SUNWEE-010。The raw materials of this embodiment consist of: 25 parts of dimethyl 2 allyl ammonium chloride, 4 parts of dimethyl 2 allyl ammonium chloride-acrylamide polymer, 4 parts of nonionic surfactant OP-10, 1 part of nonionic fluorosurfactant, 2 parts of cellulase, 5 parts of potassium chloride, and 59 parts of water; the molecular weight of the dimethyl 2 allyl ammonium chloride-acrylamide polymer is 500,000, and the The nonionic fluorosurfactant is SUNF-01, a fluorine-containing alkyl ethoxy ether alcohol nonionic surfactant, and the cellulase is cellulase SUNWEE-010.
本实施例的制备方法同实施例1。The preparation method of this embodiment is the same as that of Example 1.
实施例5Example 5
本实施例的原料组成为：二甲基2烯丙基氯化铵28份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物3份，非离子表面活性剂OP-10 3份，非离子氟表面活性剂2份，纤维素酶2份，氯化钾5份，水57份；所述二甲基2烯丙基氯化铵-丙烯酰胺聚合物的分子量为100万，所述非离子氟表面活性剂为含氟烷基乙氧基醚醇非离子表面活性剂SUNF-01，所述纤维素酶为纤维素酶SUNWEE-010。The raw materials of this embodiment consist of: 28 parts of dimethyl 2 allyl ammonium chloride, 3 parts of dimethyl 2 allyl ammonium chloride-acrylamide polymer, 3 parts of nonionic surfactant OP-10, 2 parts of nonionic fluorosurfactant, 2 parts of cellulase, 5 parts of potassium chloride, and 57 parts of water; the molecular weight of the dimethyl 2 allyl ammonium chloride-acrylamide polymer is 1 million, and the The nonionic fluorosurfactant is SUNF-01, a fluorine-containing alkyl ethoxy ether alcohol nonionic surfactant, and the cellulase is cellulase SUNWEE-010.
本实施例的制备方法同实施例1。The preparation method of this embodiment is the same as that of Example 1.
实施例6Example 6
本实施例的原料组成为：二甲基2烯丙基氯化铵20份，二甲基2烯丙基氯化铵-丙烯酰胺聚合物3份，非离子表面活性剂OP-10 2份，非离子氟表面活性剂2份，纤维素酶3份，氯化钾1份，水69份；所述二甲基2烯丙基氯化铵-丙烯酰胺聚合物的分子量为5万，所述非离子氟表面活性剂为含氟烷基乙氧基醚醇非离子表面活性剂SUNF-01，所述纤维素酶为纤维素酶SUNWEE-010。The raw materials of this embodiment consist of: 20 parts of dimethyl 2 allyl ammonium chloride, 3 parts of dimethyl 2 allyl ammonium chloride-acrylamide polymer, 2 parts of nonionic surfactant OP-10, 2 parts of nonionic fluorosurfactant, 3 parts of cellulase, 1 part of potassium chloride, and 69 parts of water; the molecular weight of the dimethyl 2 allyl ammonium chloride-acrylamide polymer is 50,000, and the The nonionic fluorosurfactant is SUNF-01, a fluorine-containing alkyl ethoxy ether alcohol nonionic surfactant, and the cellulase is cellulase SUNWEE-010.
本实施例的制备方法同实施例1。The preparation method of this embodiment is the same as that of Example 1.
本发明的用量如下(药剂加量均指药剂在钻井泥浆中的质量比)：The consumption of the present invention is as follows (medication dosage all refers to the mass ratio of medicament in drilling mud):
1、比如3000米左右的常规井，温度在100℃左右，建议加量在0.05％-0.15％之间；5000米的常规井，温度在150℃的时候，建议加量在0.1％-0.2％之间。1. For example, for a conventional well of about 3,000 meters, the temperature is about 100°C, and the recommended dosage is between 0.05%-0.15%; for a conventional well of 5,000 meters, when the temperature is 150°C, the recommended dosage is 0.1%-0.2% between.
2、复杂地层井在3000米的时候，垮塌比较严重，加量应在0.1％-0.2％；5000米的井，温度在150℃的时候，加量应在0.2％-0.4％之间。2. When the well in complex formation is 3000 meters, the collapse is serious, and the dosage should be 0.1%-0.2%. For the well of 5000 meters, when the temperature is 150℃, the dosage should be between 0.2%-0.4%.
3、加入的方法：直接加入钻井液中，应尽可能做到加入均匀，才能达到最好效果。3. Adding method: directly add to the drilling fluid, it should be added as evenly as possible to achieve the best effect.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101510542ACN101362938B (en) | 2008-09-23 | 2008-09-23 | Drilling shaft lining stabilizer |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101510542ACN101362938B (en) | 2008-09-23 | 2008-09-23 | Drilling shaft lining stabilizer |
| Publication Number | Publication Date |
|---|---|
| CN101362938Atrue CN101362938A (en) | 2009-02-11 |
| CN101362938B CN101362938B (en) | 2010-11-10 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101510542AExpired - Fee RelatedCN101362938B (en) | 2008-09-23 | 2008-09-23 | Drilling shaft lining stabilizer |
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| CN (1) | CN101362938B (en) |
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| CN103013482A (en)* | 2013-01-16 | 2013-04-03 | 天津塘沽海德科技有限公司 | Composite well wall stabilizer |
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| CN101693829B (en)* | 2009-10-28 | 2012-09-05 | 中联煤层气国家工程研究中心有限责任公司 | Pulverized coal dispersing agent and active water fracturing fluid for fracturing of coal bed gas well |
| CN103013482A (en)* | 2013-01-16 | 2013-04-03 | 天津塘沽海德科技有限公司 | Composite well wall stabilizer |
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| CN101362938B (en) | 2010-11-10 |
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