Cement compositions with improved fluid loss characteristics and methods of cementing in surface and subterranean applications

Inactive Publication Date: 2005-02-17
HALLIBURTON ENERGY SERVICES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

In yet another embodiment, the present invention provides a method of reducing the fluid loss from a cement composition that comprises adding to the cement compo

Problems solved by technology

Excessive fluid loss, inter alia, causes a cement composition to be prematurely dehydrated, which limits the amount of cement composition that can be pumped, decreases the compressive strength of the set cement composition, and prevents or reduces bond strength between the set cement composition and the subterranean zone, the walls of pipe, and/or the walls of the well bore.
The temperature limitations of certain of the AA/AMPS copolymers, e.g., ineffectiveness at temperatures above about 125° F. BHCT, are believed to be the result of hydrolysis of the amide groups.
The carboxylate groups formed by such hydrolysis convert the copolymers to materials, which lead to retarding of the setting

Method used

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  • Cement compositions with improved fluid loss characteristics and methods of cementing in surface and subterranean applications
  • Cement compositions with improved fluid loss characteristics and methods of cementing in surface and subterranean applications
  • Cement compositions with improved fluid loss characteristics and methods of cementing in surface and subterranean applications

Examples

Experimental program
Comparison scheme
Effect test

Example

EXAMPLE 1

Sample compositions were prepared by mixing a cement slurry with a fluid loss control additive according to the following procedure. Each sample was dry blended, then mixed for 35 seconds at 13,000 rpm in a blender. Next, the sample was conditioned for 20 minutes at 125° F. in an atmospheric consistometer. After the sample was poured into a preheated cell with a 325 mesh screen, a fluid loss test was performed for 30 minutes at 1,000 psi and 125° F., in accordance with API RP 10B, Recommended Practices for Testing Well Cements.

Sample Composition No. 1 (comparative) comprises a 15.6 lb / gallon (“ppg”) slurry of Texas Lehigh Class A cement, with no fluid loss control additives. The fluid loss was found to be 1,574 cubic centimeters.

Sample Composition No. 2 (comparative) was prepared by mixing 0.5% of Universal Cement Systems™ multi-purpose cement additive bwoc with a 15.6 ppg slurry of Texas Lehigh Class A cement. The fluid loss was found to be 1,175 cubic centimeters.

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Example

Sample Composition No. 4 was then permitted to age for a period of two days, and a period of ten days. After each time period had elapsed, a fluid loss test was again performed for 30 minutes at 1,000 psi and 125° F. After aging for a total of two days, Sample Composition No. 4 demonstrated a fluid loss of 84 cubic centimeters. After aging for a total of ten days, Sample Composition No. 4 demonstrated a fluid loss of 76 cubic centimeters. This Example demonstrates, inter alia, that the use of a fluid loss control additive comprising a reduced dose of an acrylic acid copolymer derivative, can deliver performance equal to or superior to a larger dose of an acrylic acid copolymer derivative.

Example

EXAMPLE 3

Sample compositions were prepared by mixing a cement slurry with a fluid loss control additive according to the following procedure. Each sample was dry blended, then mixed for 35 seconds at 13,000 rpm in a blender. Next, the sample was conditioned for 20 minutes at 125° F. in an atmospheric consistometer. After the sample was poured into a preheated cell with a 325 mesh screen, a fluid loss test was performed for 30 minutes at 1,000 psi and 125° F., in accordance with API RP 10B, Recommended Practices for Testing Well Cements.

Sample Composition No. 6 (comparative) was prepared by mixing 0.5% of HALAD®-413 bwoc with a 15.8 ppg slurry of an experimental cement bearing compositional similarities to a Class H cement. The fluid loss was found to be 615 cubic centimeters.

Sample Composition No. 7 was prepared by mixing a 15.8 ppg slurry of an experimental cement bearing compositional similarities to a Class H cement with 1.0% of a fluid loss control additive comprising a 1:...

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Abstract

An improved fluid loss control additive and methods of using such compositions in surface and subterranean applications are provided. A method of cementing in a subterranean formation, that comprises providing a cement composition that comprises a cement, water, and a fluid loss control additive, the fluid loss control additive comprising an acrylic acid copolymer derivative, an iron compound, and at least one of a hydratable polymer or a dispersant, placing the cement composition into the subterranean formation, and permitting the cement composition to set therein, is provided. Also provided are methods of reducing the fluid loss from a cement composition, cement compositions, and fluid loss control additives.

Description

BACKGROUND The present invention relates to cementing operations, and more particularly, to cement compositions comprising an improved fluid loss control additive, and methods of using such compositions in surface and subterranean applications. Hydraulic cement compositions are commonly utilized in subterranean operations, particularly subterranean well completion and remedial operations. For example, hydraulic cement compositions are used in primary cementing operations whereby pipe strings such as casings and liners are cemented in well bores. In performing primary cementing, hydraulic cement compositions are pumped into the annular space between the walls of a well bore and the exterior surface of the pipe string disposed therein. The cement composition is permitted to set in the annular space, thereby forming an annular sheath of hardened substantially impermeable cement therein that substantially supports and positions the pipe string in the well bore and bonds the exterior s...

Claims

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Application Information

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IPC IPC(8): C04B28/02C04B40/00C09K8/487
CPCC04B28/02C04B40/0039C04B2103/46C09K8/487C04B24/163C04B2103/0014C04B2103/408C04B14/047C04B14/062C04B14/108C04B24/04C04B24/20C04B22/124C04B22/12C04B24/18C04B24/2641C04B24/383C04B24/06C04B24/22C04B24/2652
Inventor CAVENY, WILLIAM J.MORGAN, RICKEY L.KOCH, RONNEY R.
Owner HALLIBURTON ENERGY SERVICES INC
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