Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ultralow-density cement paste system for slim hole cementation and preparation method and application thereof
The invention belongs to the technical field of oil field well cementation, and relates to an ultralow-density cement paste system for slim hole well cementation and a preparation method and application thereof. The cement paste comprises the following components in parts by weight: 40-60 parts of G-grade oil well cement, 15-25 parts of hollow glass beads, 3-7 parts of fly ash, 3-7 parts of silicafume, 5-10 parts of superfine cement, 3-7 parts of a reinforcing admixture, 10-20 parts of a non-penetrating agent, 2.0-2.5 parts of a fluid loss agent, 2-5 parts of a reinforcing agent, 0.03-0.10 part of a retarder, 0.2-0.3 part of a defoamer, and 65-75 parts of water. The cement paste is stable in system, low in density, high in compressive strength, adjustable in thickening time, high in pressure resistance, low in gas phase permeability and low in friction pressure consumption. The cement paste can be applied to [phi]88.9 mm small casing one-time upward-return well cementation, old well windowing sidetrack drilling hanging [phi]88.9 mm small casing well cementation, [phi]114.3 mm small casing one-time upward-return well cementation and low-pressure leaky stratum one-time upward-returnwell cementation, so that the well cementation one-time upward-return success rate and the whole well section sealing quality can be effectively improved, and application prospects are good.
本发明属于油田固井技术领域，涉及一种小井眼固井用超低密度水泥浆体系及其制备方法和应用。该水泥浆包括以重量份计的G级油井水泥40～60份，空心玻璃微珠15～25份，粉煤灰3～7份，微硅粉3～7份，超细水泥5～10份，增强掺料3～7份，非渗透剂10～20份，降失水剂2.0～2.5份，增强剂2～5份，缓凝剂0.03～0.10份，消泡剂0.2～0.3份，水65～75份。该水泥浆体系稳定，密度低，抗压强度高，稠化时间可调，耐压性强，气相渗透率低，摩阻压耗低。本发明可应用于Φ88.9mm小套管一次上返固井、老井开窗侧钻悬挂Φ88.9mm小套管固井、Φ114.3mm小套管一次上返固井及低压易漏地层一次上返固井，能有效提高固井一次上返成功率和全井段封固质量，应用前景良好。
Ultralow-density cement paste system for slim hole cementation and preparation method and application thereof
The invention belongs to the technical field of oil field well cementation, and relates to an ultralow-density cement paste system for slim hole well cementation and a preparation method and application thereof. The cement paste comprises the following components in parts by weight: 40-60 parts of G-grade oil well cement, 15-25 parts of hollow glass beads, 3-7 parts of fly ash, 3-7 parts of silicafume, 5-10 parts of superfine cement, 3-7 parts of a reinforcing admixture, 10-20 parts of a non-penetrating agent, 2.0-2.5 parts of a fluid loss agent, 2-5 parts of a reinforcing agent, 0.03-0.10 part of a retarder, 0.2-0.3 part of a defoamer, and 65-75 parts of water. The cement paste is stable in system, low in density, high in compressive strength, adjustable in thickening time, high in pressure resistance, low in gas phase permeability and low in friction pressure consumption. The cement paste can be applied to [phi]88.9 mm small casing one-time upward-return well cementation, old well windowing sidetrack drilling hanging [phi]88.9 mm small casing well cementation, [phi]114.3 mm small casing one-time upward-return well cementation and low-pressure leaky stratum one-time upward-returnwell cementation, so that the well cementation one-time upward-return success rate and the whole well section sealing quality can be effectively improved, and application prospects are good.
本发明属于油田固井技术领域，涉及一种小井眼固井用超低密度水泥浆体系及其制备方法和应用。该水泥浆包括以重量份计的G级油井水泥40～60份，空心玻璃微珠15～25份，粉煤灰3～7份，微硅粉3～7份，超细水泥5～10份，增强掺料3～7份，非渗透剂10～20份，降失水剂2.0～2.5份，增强剂2～5份，缓凝剂0.03～0.10份，消泡剂0.2～0.3份，水65～75份。该水泥浆体系稳定，密度低，抗压强度高，稠化时间可调，耐压性强，气相渗透率低，摩阻压耗低。本发明可应用于Φ88.9mm小套管一次上返固井、老井开窗侧钻悬挂Φ88.9mm小套管固井、Φ114.3mm小套管一次上返固井及低压易漏地层一次上返固井，能有效提高固井一次上返成功率和全井段封固质量，应用前景良好。
Ultralow-density cement paste system for slim hole cementation and preparation method and application thereof
一种小井眼固井用超低密度水泥浆体系及其制备方法和应用
MIN JIANGBEN (Autor:in) / WANG WENBIN (Autor:in) / CHEN XIAORONG (Autor:in) / WAN XIANGCHEN (Autor:in) / LIU XIAOLI (Autor:in) / LI ZHIHONG (Autor:in) / WANG DING (Autor:in) / JIANG XIANGZU (Autor:in) / CAO YANQIN (Autor:in) / LUO LIXIA (Autor:in)
03.11.2020
Patent
Elektronische Ressource
Chinesisch
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