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A platform for research: civil engineering, architecture and urbanism
Low-density high-strength toughened cement paste system for oil layer and preparation method of low-density high-strength toughened cement paste system
The invention belongs to the field of well cementation cement paste, and particularly relates to a low-density high-strength toughened cement paste system for an oil layer and a preparation method thereof. The cement paste system mainly comprises water and the following components in parts by weight: 100 parts of oil well cement, 8-20 parts of a lightening agent, 2-6 parts of solid latex, 3-4 parts of a fluid loss agent, 8-20 parts of a reinforcing agent, 0.1-0.3 part of a drag reducer, 2-4 parts of an expanding agent and 0.1-0.2 part of a defoaming agent. The cement paste system has good toughness, and can effectively reduce the annulus liquid column pressure during well cementation; meanwhile, high strength and high toughness of set cement are guaranteed, and the phenomena that a stratum is pressed and leaked in the cementing process and a thin cement sheath is broken during perforation, and oil-water layer outside-pipe channeling is caused are avoided; meanwhile, the cement paste system also has the characteristics of micro expansion, low filter loss, good stability, good rheological property and the like, and solves the well cementation quality problem of low-pressure easy-leakage wells and casing windowing sidetracking well cementing.
本发明属于固井水泥浆领域，具体涉及一种油层用低密高强增韧水泥浆体系及其制备方法。该水泥浆体系主要由水和以下重量份数的组分组成：油井水泥100份，减轻剂8～20份，固体胶乳2～6份，降失水剂3～4份，增强剂8～20份，减阻剂0.1～0.3份，膨胀剂2～4份，消泡剂0.1～0.2份。该水泥浆体系具有较好的韧性，可有效降低固井时环空液柱压力；同时保证水泥石的高强度高韧性，避免注水泥过程压漏地层及薄水泥环射孔时发生碎裂，导致油水层管外窜通；同时该水泥浆体系还具有微膨胀、低滤失量、稳定性好、流变性好等特点，解决了低压易漏井及套管开窗侧钻井注水泥的固井质量问题。
Low-density high-strength toughened cement paste system for oil layer and preparation method of low-density high-strength toughened cement paste system
The invention belongs to the field of well cementation cement paste, and particularly relates to a low-density high-strength toughened cement paste system for an oil layer and a preparation method thereof. The cement paste system mainly comprises water and the following components in parts by weight: 100 parts of oil well cement, 8-20 parts of a lightening agent, 2-6 parts of solid latex, 3-4 parts of a fluid loss agent, 8-20 parts of a reinforcing agent, 0.1-0.3 part of a drag reducer, 2-4 parts of an expanding agent and 0.1-0.2 part of a defoaming agent. The cement paste system has good toughness, and can effectively reduce the annulus liquid column pressure during well cementation; meanwhile, high strength and high toughness of set cement are guaranteed, and the phenomena that a stratum is pressed and leaked in the cementing process and a thin cement sheath is broken during perforation, and oil-water layer outside-pipe channeling is caused are avoided; meanwhile, the cement paste system also has the characteristics of micro expansion, low filter loss, good stability, good rheological property and the like, and solves the well cementation quality problem of low-pressure easy-leakage wells and casing windowing sidetracking well cementing.
本发明属于固井水泥浆领域，具体涉及一种油层用低密高强增韧水泥浆体系及其制备方法。该水泥浆体系主要由水和以下重量份数的组分组成：油井水泥100份，减轻剂8～20份，固体胶乳2～6份，降失水剂3～4份，增强剂8～20份，减阻剂0.1～0.3份，膨胀剂2～4份，消泡剂0.1～0.2份。该水泥浆体系具有较好的韧性，可有效降低固井时环空液柱压力；同时保证水泥石的高强度高韧性，避免注水泥过程压漏地层及薄水泥环射孔时发生碎裂，导致油水层管外窜通；同时该水泥浆体系还具有微膨胀、低滤失量、稳定性好、流变性好等特点，解决了低压易漏井及套管开窗侧钻井注水泥的固井质量问题。
Low-density high-strength toughened cement paste system for oil layer and preparation method of low-density high-strength toughened cement paste system
一种油层用低密高强增韧水泥浆体系及其制备方法
MENG WEIDONG (author) / WANG HAIJUAN (author) / YANG JUNHU (author) / TONG JICHANG (author) / LI TIEHENG (author) / SUN WU (author) / WANG KANG (author) / ZHANG NA (author) / ZHOU JIANHUA (author)
2021-09-24
Patent
Electronic Resource
Chinese
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