Deep-water low-temperature low-density early-strength cementing slurry for well cementation

A technology of early-strength cement and low temperature, which is applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as endangering oil and gas exploitation and platform safety, affecting the anti-channeling ability of cement slurry, and complex aerated cement slurry technology. Achieve excellent anti-gas channeling ability, good suspension stability, and solve the effect of cementing technical problems

Active Publication Date: 2010-06-23
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF10 Cites 67 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main problems: the high alumina cement system has advantages in the development of compressive strength, but it is highly sensitive to temperature, sensitive to pollutants, and the heat release of hydration is too fast; the technology of aerated cement slurry is complicated and the cost is high; the use of G-grade oil wells The strength

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: Density is 1.7g / cm 3 The deep-water low-density low-density early-strength cement slurry: each component is calculated by weight.

[0036] Low temperature early strength cement 100 parts. Mineral content and parts by weight in 100 parts by weight of low-temperature early-strength cement are: SiO 2 , 10 copies; Al 2 o 3 , 35 parts; Fe 2 o 3 , 2 parts; CaO, 43 parts; SO 3 , 10 servings.

[0037] 20 parts of low temperature reinforcing materials. The low-temperature reinforcing material is ultrafine powder slag, which contains the following components and parts by weight in 100 parts by weight of ultrafine powder slag: SiO 2 , 38 copies; Al 2 o 3 , 12 parts; Fe 2 o 3 , 2.5 parts; CaO, 42.5 parts; MgO, 5 parts. The ultrafine powder slag has a particle size range of 45 microns.

[0038] Low-density lightening material 10 parts. The low-density lightening material uses hollow glass microspheres.

[0039]2.5 parts of early strength agent. The ear...

Embodiment 2

[0045] Embodiment 2: Density is 1.5g / cm 3 The deep-water low-density low-density early-strength cement slurry: each component is calculated by weight.

[0046] Low temperature early strength cement 100 parts. Mineral content and parts by weight in 100 parts by weight of low-temperature early-strength cement are: SiO 2 , 8 parts; Al 2 o 3 , 37 parts; Fe 2 o 3 , 2 parts; CaO, 38 parts; SO 3 , 15 servings.

[0047] 25 parts of low-temperature reinforcing materials. The low-temperature reinforcing material is ultrafine powder slag, which contains the following components and parts by weight in 100 parts by weight of ultrafine powder slag: SiO 2 , 35 parts; Al 2 o 3 , 14 parts; Fe 2 o 3 , 1.5 parts; CaO, 40 parts; MgO, 9.5 parts. The particle size range of ultrafine powder slag is between 45 and 90 microns.

[0048] 25 parts of low-density lightening material; the low-density lightening material adopts synthetic sodium-boron microbeads with a particle size between 10-...

Embodiment 3

[0055] Embodiment 3: the density is 1.4g / cm 3 The deep-water low-density low-density early-strength cement slurry: each component is calculated by weight.

[0056] 100 parts of low-temperature early-strength cement, mineral content and parts by weight in 100 parts by weight of low-temperature early-strength cement are: SiO 2 , 5 copies; Al 2 o 3 , 34 parts; Fe 2 o 3 , 3 parts; CaO, 44 parts; SO 3 , 14 servings.

[0057] 25 parts of low-temperature reinforcing material; the low-temperature reinforcing material is ultrafine powder slag, which contains the following components and parts by weight in 100 parts by weight of ultrafine powder slag: SiO 2 , 33 copies; Al 2 o 3 , 15 parts; Fe 2 o 3 , 3 parts; CaO, 42 parts; MgO, 7 parts. The particle size range of ultrafine powder slag is between 45 and 90 microns.

[0058] 35 parts of low-density lightening material. The low-density lightening material uses hollow glass microspheres.

[0059] 3 parts of early strength ag...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Densityaaaaaaaaaa
Densityaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention relates to deep-water low-temperature low-density early-strength cementing slurry for well cementation in petroleum drilling engineering, which contains 100 parts of low-temperature early-strength cement, 10 to 30 parts of low-temperature reinforcing material, 10 to 80 parts of low-density light-weight material, 0.5 to 4 parts of drag reducer, 2.5 to 8 parts of fluid loss additive, 0.1 to 5 parts of retarder, 0.15 to 1.2 parts of defoamer, 2.5 to 8 parts of early strength agent and 57 to 95 parts of water, and slurry with the density of 1.2g/cm3 to 1.7g/cm3 can be prepared. The slurry system at least has the following advantages that: the maximum early strength (24 hours) can reach 14.7MPa, the long-term strength stability is good, the static gelling transition time is short, and the system is stable. The invention provides technical support for the quality of deep-water well cementation.

Description

technical field [0001] The invention relates to the field of petroleum drilling engineering, in particular to a deep-water low-density early-strength cementing cement slurry used in the cementing cementing technology, which is used for deep-water low-temperature cementing. Background technique [0002] The world's offshore oil reserves are about 100 billion tons, and the proven reserves are more than 38 billion tons; the offshore natural gas reserves are about 140 trillion cubic meters, and the proven reserves are about 40 trillion cubic meters. The average depth of the ocean is 3,730 meters, and the sea area with a water depth of 3,000 to 6,000 meters accounts for 73.83% of the total ocean area. However, 80% of the proven offshore oil reserves are still concentrated in the near-continental shelf area within a water depth of 500 meters, which shows that there are still untapped reserves in the deep water (500 meters-1500 meters) or even ultra-deep water (above 1500 meters). ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K8/473C09K8/487C09K8/467
Inventor 屈建省席方柱谭文礼吕光明高永会刘爱萍孙富全王翀
Owner BC P INC CHINA NAT PETROLEUM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap