Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

High-strength and low-density cement paste using fluid loss agent

A technology of fluid loss reducing agent and cement slurry, which is applied in the field of cement slurry for oil field cementing, to achieve the effect of no free water, good suspension stability and low free water content

Active Publication Date: 2012-07-04
BC P INC CHINA NAT PETROLEUM CORP +1
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] For low formation pressure, it is necessary to use a density of 1.20-1.30g / cm 3 The cement slurry of the above-mentioned prior art cannot meet the requirements, but only floating beads can meet this requirement

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

[0030] Example 1: The density is 1.35 g / cm 3 The high-strength and low-density cement slurry produced and sold by Xi'an Petroleum Technology Co., Ltd.

[0031] Grade G oil well cement: 100 parts

[0032] Lightener: 23 servings

[0033] Micro silicon: 6.5 parts

[0034] Fluid loss reducer: 2%

[0035] Medium temperature retarder for oil well cement: 0.05-0.15%

[0036] Water-solid ratio: 0.7

[0037] Among them, the amount of fluid loss reducer and retarder is the percentage of the total mass of G-grade oil well cement, lightening agent and micro-silicon, and the water-solid ratio is the ratio of water to the mass sum of the three.

Embodiment 2

[0038] Example 2: The density is 1.30 g / cm 3 The high-strength and low-density cement slurry produced and sold by Xi'an Petroleum Technology Co., Ltd.

[0039] Grade G oil well cement: 100 parts

[0040] Lightener: 32 servings

[0041] Micro silicon: 7 parts

[0042] Fluid loss reducer: 2%

[0043] Medium temperature retarder for oil well cement: 0.05-0.15%

[0044] Water-solid ratio: 0.7

[0045] Among them, the amount of fluid loss reducer and retarder is the percentage of the total mass of G-grade oil well cement, lightening agent and micro-silicon, and the water-solid ratio is the ratio of water to the mass sum of the three.

Embodiment 3

[0046] Embodiment 3: Density is 1.25 g / cm 3 The high-strength and low-density cement slurry produced and sold by Xi'an Petroleum Technology Co., Ltd.

[0047] Grade G oil well cement: 100 parts

[0048] Lightener: 40 servings

[0049] Micro silicon: 7.5 parts

[0050] Fluid loss reducer: 2%

[0051] Medium temperature retarder for oil well cement: 0.05-0.15%

[0052] Water-solid ratio: 0.75

[0053] The amount of fluid loss reducer and retarder is the percentage of the total mass of G-grade oil well cement, lightening agent and micro-silicon, and the water-solid ratio is the ratio of water to the total mass of the three.

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
densityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-strength and low-density cement paste using a fluid loss agent, relating to the technical field of oil field well sealing cement paste. The high-strength and low-density cement paste using the fluid loss agent comprises the following components in part by weight: 100 parts of G-level oil well cement, 23-50 parts of lightening admixture 6.5-8 parts of microsilica, 2 parts of fluid loss agent and 0.05-0.15 parts of setting retarder, wherein the using amounts of the fluid loss agent and the setting retarder are the percentage of the total mass of the G-level oil well cement, the lightening admixture and the microsilica; the ratio of water to solid in the cement paste is 0.7-0.75 and is the ratio of water to the total mass of the G-level oil well cement, the lightening admixture and the microsilica. The cement paste has a density of 1.20-1.35g / cm<3>, has high strength, good fluidity, no free water and good systematic stability, and can meet well sealing requirements on long-term sealing or full sealing of a deep well in an easily-leaking stratum.

Description

[0001] technical field [0002] The invention relates to the technical field of cement slurry for oil field cementing, in particular to a high-strength and low-density cement slurry using a fluid loss reducer for sealing low-pressure and leaky formations in the field of well cementing. Background technique [0003] At present, with the development of my country's oil and gas fields, more and more attention has been paid to the development of low-efficiency oil and gas reservoirs (low pressure, low permeability, easy leakage formations) and the requirements for reservoir protection. The main method to solve complex cementing problems such as long sealing or full sealing of deep wells with low-pressure leaky formations is to use low-density cement slurry system. However, low-density cement slurries generally have problems such as low strength, high free water content, poor system stability and difficult control of API dehydration. Due to the low production of single well ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00
Inventor 魏周胜陈宁李波吴学升周兵欧阳勇温雪丽罗丽霞
Owner BC P INC CHINA NAT PETROLEUM CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com