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High-temperature-resistant high-density cement slurry for oilfield

A technology with high temperature resistance and high density, applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of poor cementing quality and unstable performance of high-density cement slurry, and achieve good curve shape and thickening transition The effect of short time and stable performance

Inactive Publication Date: 2018-04-17
CHENGDU KESHENG PETROLEUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the performance of high-density cement slurry is unstable and the cementing quality is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The high-temperature-resistant high-density cement slurry for oil fields of the present invention includes the following components: cement, inorganic solid phase weighting agent, dispersant, silica sand, microsilica fume, high-temperature water loss reducing agent, high-temperature retarder, weighting stabilizer, foaming agent;

[0021] The high temperature resistant fluid loss reducing agent includes the following components: 2-acrylamide-2-methylpropanesulfonic acid, acrylic acid, acrylamide, vinylpyrrolidone, maleic anhydride, diallyldimethylammonium chloride;

[0022] The weighting stabilizer includes the following components in parts by weight: 10-15 parts of silicon oxide, 30-40 parts of titanium oxide, 30-40 parts of manganese oxide, 6-8 parts of asphalt fine powder;

[0023] The high-temperature retarder includes the following components: oxidized starch, organic phosphonic acid, zinc oxide, and sodium borate.

[0024] In the present invention, a weighted stab...

Embodiment 2

[0026] Based on Example 1, the high-temperature-resistant high-density cement slurry for oil fields includes the following components in parts by weight: 100 parts of cement, 15-150 parts of inorganic solid phase weighting agent, 0.5-2 parts of dispersant, 30-45 parts of silica sand , 20-30 parts of silica fume, 5-8 parts of high-temperature fluid loss reducer, 1-3 parts of high-temperature retarder, 5-10 parts of weight stabilizer, and 0.1-0.5 parts of defoamer. The weighting stabilizer includes the following components in parts by weight: 10-15 parts of silicon oxide, 30-40 parts of titanium oxide, 30-40 parts of manganese oxide, and 6-8 parts of asphalt fine powder. The high temperature resistant fluid loss reducing agent includes the following components in parts by weight: 30-40 parts of 2-acrylamide-2-methylpropanesulfonic acid, 5-10 parts of acrylic acid, 15-20 parts of acrylamide, 10-15 parts 10-15 parts of vinylpyrrolidone, 10-15 parts of maleic anhydride, 10-15 parts...

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PUM

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Abstract

The invention discloses a high-temperature-resistant high-density cement slurry for oil fields, which comprises the following components: cement, inorganic solid-phase weighting agent, dispersant, silica sand, microsilica fume, high-temperature water loss reducing agent, high-temperature retarder, and weighting stabilizer , defoaming agent; the high temperature resistant fluid loss reducing agent includes the following components: 2-acrylamide-2-methylpropanesulfonic acid, acrylic acid, acrylamide, vinylpyrrolidone, maleic anhydride, diallyl dimethyl ammonium chloride; the high temperature retarder includes the following components: oxidized starch, organic phosphonic acid, zinc oxide, sodium borate. The weighted stabilizer, high-temperature fluid loss reducing agent and high-temperature retarder in the oil of the invention solve the problems of unstable performance of high-density cement slurry and poor cementing quality.

Description

technical field [0001] The invention relates to a high-density cement paste, in particular to a high-density cement paste with high temperature resistance for oil fields. Background technique [0002] Cementing is an important link in oil well construction. The quality of cementing directly affects the quality of the well's continuous drilling and subsequent completion, oil production, workover and other operations. The cementing operation is divided into casing and cement injection. Cement slurry is used to fill the annular space between casing and borehole, and its performance directly affects the quality of cementing. [0003] With the depletion of oil and gas resources, the exploration field continues to expand to deep and complex oil and gas reservoirs. There are more and more deep wells and ultra-deep wells. Deep formations require higher and higher cement slurry densities, and the resting temperature at the bottom of the well often exceeds 175°C. Ultra-high temperat...

Claims

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Application Information

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IPC IPC(8): C09K8/467C09K8/48C09K8/487C04B28/00
CPCC09K8/467C04B28/00C04B2201/20C09K8/48C09K8/487C04B2103/0068C04B2103/408C04B14/06C04B18/146C04B2103/50C04B24/16C04B24/2641C04B24/2652C04B24/008C04B24/04C04B24/121C04B14/305C04B14/30C04B24/36C04B24/38C04B24/003C04B22/0013
Inventor 贺昶明
Owner CHENGDU KESHENG PETROLEUM TECH
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