High-temperature-resistant gel plugging agent

A technology of high temperature-resistant gel and loss-stopping agent, which is applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of low pumping efficiency, limitation, dilution and flushing away, etc., and achieves good plugging effect. , improve the utilization rate, the effect of good water resistance

Active Publication Date: 2016-02-17
DAQING BEIHUA CHEM PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many kinds of plugging agents, most of which have problems such as low efficiency of pumping into the formation, and being diluted and washed away...

Method used

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  • High-temperature-resistant gel plugging agent
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  • High-temperature-resistant gel plugging agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 2

[0033] The plugging agent is prepared from Tianqing glue, titanate, carboxymethyl cellulose, polyacrylamide, peanut shells and distilled water in parts by weight, Tianqing glue: titanate: carboxymethyl cellulose: polypropylene Amide: peanut shell: distilled water = 0.3:0.1:0.2:0.2:3:90.

Embodiment 3

[0035] The plugging agent is prepared from Tianqing glue, titanate, carboxymethyl cellulose, polyacrylamide, walnut shell and distilled water in parts by weight, Tianqing glue: titanate: carboxymethyl cellulose: polypropylene Amide: walnut shell: distilled water = 0.8:0.4:0.6:0.6:8:96.

Embodiment 4

[0037] The plugging agent is prepared from Tianqing gum, titanate, carboxymethyl cellulose, polyacrylamide, peanut shells, walnut shells and distilled water in parts by weight, Tianqing gum: titanate: carboxymethyl cellulose : Polyacrylamide: Peanut shell: Walnut shell: Distilled water = 0.3: 0.4: 0.6: 0.2: 1: 2: 90.

[0038] Table 1 The gelation time and viscosity of the polymer of Tianqing gum and titanate with different amounts of CMC at 25°C

[0039]

[0040] Table 2 Comparison of the viscosity of the gel after hot rolling at 120°C for 16 hours and before hot rolling

[0041]

[0042] Table 3 The gelation time and viscosity of the gel system at different pH values

[0043]

[0044] Table 4 Gel forming time of gel system at 40°C, 60°C, 80°C, 100°C, 120°C, 140°C

[0045]

[0046] Table 5 Leakage of the gel system at 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa pressure at 25°C

[0047]

[0048] Table 6: Leakage of the gel system at 0.1MPa, 0.2MPa, 0.3MPa, 0.4MPa pressure...

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Abstract

The invention relates to a high-temperature-resistant gel plugging agent. The high-temperature-resistant gel plugging agent is characterized by being prepared from sesbania gum, titanate, carboxymethylcellulose, polyacrylamide, solid-phase particles and distilled water in parts by weight. The high-temperature-resistant gel plugging agent can resist the high temperature of 120 DEG C and has the good salt resistance. The plugging agent is not limited by the size and the shape of a leakage path and can enter the leakage path through compressional deformation, the utilization rate of the plugging agent is increased, and the waterproof performance is good. Besides, common gel plugging agents are limited for high-temperature stratums and stratums with the higher mineralization degree, and the temperature resistance and the salt resistance of the newly developed gel plugging agent are tried to be improved.

Description

technical field [0001] The invention relates to a gel plugging agent, in particular to a high temperature resistant gel plugging agent. Background technique [0002] Lost circulation refers to a complex downhole situation in which drilling fluid, workover fluid, cement slurry, etc. leak into the formation during the exploration and development of oil and natural gas. Lost circulation will affect the drilling cycle. It will affect the production of oil and gas wells. At present, there are many kinds of lost circulation agents, but most of them have problems such as low efficiency of pumping into formations, and being diluted and washed away when applied to formations with high water content. In addition, common gel plugging agents have limitations for high-temperature formations and formations with high salinity. Contents of the invention [0003] In view of the above problems, the present invention provides a high-temperature-resistant gel plugging agent, which has good ...

Claims

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Application Information

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IPC IPC(8): C09K8/44
CPCC09K8/426C09K8/44C09K2208/04
Inventor 潘一张然温峥杨双春佟乐李剑虹李存磊王家骏
Owner DAQING BEIHUA CHEM PLANT
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