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Latex anti-channeling cement composition and cement paste for adjusting well cementation

A cement composition and a technology for oil well cement, which are applied in the field of oil drilling, can solve problems such as difficulty in meeting adjustment well cementing, long transition time, low filtration loss, etc., and achieve good channeling prevention effect, short transition time, and filtration loss. small effect

Inactive Publication Date: 2020-02-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cement slurry has the characteristics of micro-expansion, low fluid loss, and good rheology, but its transition time is long, which is difficult to meet the needs of adjustment well cementing

Method used

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  • Latex anti-channeling cement composition and cement paste for adjusting well cementation
  • Latex anti-channeling cement composition and cement paste for adjusting well cementation
  • Latex anti-channeling cement composition and cement paste for adjusting well cementation

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Effect test

Embodiment 1

[0032] The latex anti-channeling cement composition of the present embodiment is composed of the following components in parts by weight: 65 parts of oil well cement, 3 parts of latex, 1.3 parts of fluid loss reducer, 1.3 parts of drag reducer, 1.2 parts of early strength agent, expansion agent 0.3 parts, 0.2 parts of defoamer. Wherein the expansion agent is QJ625 (Beijing Aokeli Science and Technology Development Co., Ltd.).

Embodiment 2

[0034] The latex anti-channeling cement composition of the present embodiment is composed of the following components in parts by weight: 65 parts of oil well cement, 2 parts of latex, 1.3 parts of fluid loss reducer, 1.3 parts of drag reducer, 1.2 parts of early strength agent, expansion agent 0.3 parts, 0.2 parts of defoamer. Wherein the expansion agent is QJ625 (Beijing Aokeli Science and Technology Development Co., Ltd.).

Embodiment 3

[0036] The latex anti-channeling cement composition of the present embodiment consists of the following components in parts by weight: 65 parts of oil well cement, 1.5 parts of latex, 1.3 parts of fluid loss reducer, 1.3 parts of drag reducer, 1.2 parts of early strength agent, expansion agent 0.3 parts, antifoaming agent is 0.2 parts. Wherein the expansion agent is QJ625 (Beijing Aokeli Science and Technology Development Co., Ltd.).

[0037] Two. Examples of cement slurry used for adjustment well cementing

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Abstract

The invention belongs to the technical field of petroleum drilling, and particularly relates to a latex anti-channeling cement composition and cement paste for adjusting well cementation. The latex anti-channeling cement composition is mainly composed of the following components in parts by weight: 60-70 parts of oil well cement, 0.5-3 parts of latex, 1-2 parts of a fluid loss agent, 1-1.5 parts of a drag reducer, 1-2 parts of an early strength agent, 0.2-0.4 part of an expanding agent and 0.1-0.2 part of a defoaming agent. And the expanding agent is an aluminum powder gas generating agent. The cement paste formed by the latex anti-channeling cement composition and water is good in comprehensive performance, has the advantages of being short in transition time, low in filter loss, slight in expansion, good in toughness and the like, and has good anti-channeling performance when used for adjusting well cementation.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and in particular relates to a latex anti-channeling cement composition and cement slurry for adjustment well cementing. Background technique [0002] After a long period of oilfield development, the formation energy is seriously insufficient, and water injection or polymer injection is generally required to supplement the formation energy in the frequently mined blocks. Moreover, blocks such as Xiaermen, Shuanghe, and Gucheng have entered the era of tertiary oil recovery represented by polymer flooding and ASP flooding. Long-term development has made the subsurface pressure system and fluid properties of the oilfield extremely complex. Due to the large pressure difference between layers in the vertical direction, the contradiction between pressure stability and leakage prevention is prominent during the cementing of newly drilled adjustment wells. The micro-gap produced by the volum...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/467C04B28/00C04B38/02
CPCC04B28/00C04B2111/00724C09K8/467C04B2103/0068C04B2103/50C04B2103/12C04B2103/46C04B24/2676C04B22/04C04B38/02
Inventor 曾欣郭进忠王海娟仝继昌冯名正张娜杨少春
Owner CHINA PETROLEUM & CHEM CORP