A kind of early-strength foam cement slurry for well cementing

A technology of cement slurry and foam, which is applied in applications, household appliances, and other household appliances, etc., can solve the problems of slow development of foam cement strength, and achieve the effects of ensuring uniformity and stability, fast development of low-temperature strength, and short transition time

Active Publication Date: 2018-05-25
TIANJIN BO XING ENG SCI & TECH LIMITED COMPANY OF CNPC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The solution of the present invention is to provide an early-strength foam cement slurry that meets the cementing requirements of low-temperature leaky formations in view of the problem that the strength of foam cement prepared by oil well cement develops slowly at low temperatures.

Method used

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  • A kind of early-strength foam cement slurry for well cementing
  • A kind of early-strength foam cement slurry for well cementing
  • A kind of early-strength foam cement slurry for well cementing

Examples

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example 1

[0027] The early-strength foam cement slurry formula for well cementing provided by the embodiments of the present invention is as follows:

[0028] Formula 1: 100 parts of sulfoaluminate cement, 6 parts of foaming agent A, 6 parts of foaming agent B, 7 parts of foam stabilizer, 3 parts of fluid loss reducer, 1 part of retarder, and 31 parts of water.

[0029] Formula 2: 100 parts of sulfoaluminate cement, 6 parts of foaming agent A, 6 parts of foaming agent B, 7 parts of foam stabilizer, 4 parts of fluid loss reducer, 2.5 parts of retarder, and 30 parts of water.

[0030] Formula 3: 100 parts of sulfoaluminate cement, 5 parts of foaming agent A, 5 parts of foaming agent B, 5.4 parts of foam stabilizer, 4 parts of fluid loss reducer, 1.2 parts of retarder, and 33 parts of water.

[0031] Formula 4: 100 parts of sulfoaluminate cement, 5 parts of foaming agent A, 5 parts of foaming agent B, 5.4 parts of foam stabilizer, 5 parts of fluid loss reducer, 3.0 parts of retarder, and 3...

example 2

[0044] Compared with the formula in patent CN103525387 and the article "Ultra-low density foam cement slurry suitable for cementing in Changqing Oilfield"

[0045] Adopt cement slurry formula and admixture in CN103525387:

[0046] Cement slurry formula 11: 100 parts of oil well cement, 1.0 parts of foaming agent I, 1.0 parts of foaming agent II, 1.3 parts of foam stabilizer, 1.45 parts of fluid loss reducer, 0.2 parts of dispersant, 0.6 parts of retarder, 52 parts of water share.

[0047] Cement slurry formula 12: 100 parts of sulfoaluminate cement, 1.0 parts of foaming agent I, 1.0 parts of foaming agent II, 1.3 parts of foam stabilizer, 1.45 parts of fluid loss reducer, 0.2 parts of dispersant, and 0.6 parts of retarder , 52 parts of water.

[0048] The following cement slurry was prepared using the admixtures described in the article "Ultra-low density foam cement slurry for Changqing Oilfield cementing":

[0049] Cement slurry formula 13: 100 parts of oil well cement, 3...

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Abstract

The invention discloses early strength foam cement slurry for well cementation. The early strength foam cement slurry comprises the following components in parts by mass: 100 parts of sulphoaluminate cement, 4-12 parts of a foaming agent, 2-7 parts of a foam stabilizer, 1-3 parts of a retarder, 3-5 parts of a fluid loss agent and 30-40 parts of water. The early strength foam cement slurry provided by the invention has the advantages that the density can be adjusted within 0.55-1.40 g / cm<3>; the low-temperature strength is rapidly developed; the early strength foam cement slurry is applicable to the cementation of an oil-gas well of which the bottom-hole temperature is 4-25 DEG C.

Description

technical field [0001] The invention relates to the field of petroleum drilling engineering, in particular to an early-strength foamed cement slurry for well cementing in low-temperature leaky formations. Background technique [0002] Foamed cement slurry is used to directly inflate the cement slurry to reduce the density of the cement slurry, that is, to use gas as a lightening agent to achieve the purpose of reducing the density. In 1978, S.Yamada and others in the United States tested and successfully produced foam cement for oil wells for the first time. In the 1980s, the cementing technology of foam cement has made great progress. The researchers improved the foam generator, and strictly selected the surfactant as the foam stabilizer, so that the gas can be stably dispersed in the whole system in the form of uniform bubbles separated from each other, and a foam cement slurry with excellent performance can be produced. [0003] Oilfields in the former Soviet Union, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/487C09K8/473C04B38/02C04B28/06
CPCC04B28/065C04B38/02C04B2103/48C09K8/473C09K8/487
Inventor 席方柱孙富全曾建国刘爱萍高永会熊钰丹
Owner TIANJIN BO XING ENG SCI & TECH LIMITED COMPANY OF CNPC
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