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A kind of humic acid grafted fluid loss reducer for high temperature drilling fluid and preparation method thereof

A fluid loss control agent and drilling fluid technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of high price of fluid loss control agent, poor salt and calcium resistance, etc., and achieve good economic benefits and Social benefits, good filtration loss reduction, low price effect

Active Publication Date: 2016-04-13
大庆精诚化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The present invention aims to solve the problems that the fluid loss control agent decomposes at a high temperature of 200°C, has poor resistance to salt and calcium, and the cost of a fluid loss control agent with better performance is high, and provides a humic acid for high temperature resistant drilling fluid. Grafted fluid loss reducer and preparation method thereof

Method used

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  • A kind of humic acid grafted fluid loss reducer for high temperature drilling fluid and preparation method thereof
  • A kind of humic acid grafted fluid loss reducer for high temperature drilling fluid and preparation method thereof
  • A kind of humic acid grafted fluid loss reducer for high temperature drilling fluid and preparation method thereof

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specific Embodiment approach 1

[0023] Specific embodiment 1: A kind of humic acid grafted fluid loss reducer for high temperature resistant drilling fluid in this embodiment is composed of acrylamide, 2-acrylamido-2-methylpropanesulfonic acid, acrylic acid, sodium humate, It is prepared by copolymerization of water and initiator; the mass ratio of the acrylamide to 2-acrylamide-2-methylpropanesulfonic acid is 1: (0.5-1); the mass ratio of the acrylamide to acrylic acid The mass ratio is 1: (0.20-0.5); the mass ratio of the acrylamide to sodium humate is 1: (0.7-1.5); the mass ratio of the acrylamide to water is 1: (3.5-6) ; The initiator is a compound aqueous solution, wherein the solute of the compound aqueous solution is ammonium persulfate and sodium bisulfite, and the mass concentration of the solute in the compound aqueous solution is 1% to 1.5%. The mass ratio of described ammonium persulfate and sodium bisulfite is 1:1, and the solvent of wherein said composite aqueous solution is water; Described ac...

specific Embodiment approach 2

[0027] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the mass ratio of the acrylamide to 2-acrylamido-2-methylpropanesulfonic acid is 1:0.75; the acrylamide and The mass ratio of acrylic acid is 1:0.25; the mass ratio of acrylamide to sodium humate is 1:1; the mass ratio of acrylamide to water is 1:5. Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0028] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the mass concentration of the solute in the compounded aqueous solution is 1.2%. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a high temperature resistant humic acid grafting filtrate reducer for a drilling fluid and a preparation method thereof. The filtrate reducer is used for petroleum drilling. The invention aims at solving the problems that the filtrate reducer has poor salt and calcium resistance when being decomposed at high temperature of 200 DEG C and the filtrate reducer with good properties is expensive. The high temperature resistant humic acid grafting filtrate reducer is prepared from acrylamide, 2-acrylamide-2-methyl propanesulfonic acid, acrylic acid, sodium humate, water and initiator through copolymerization. The preparation method comprises steps of sequentially adding acrylamide, 2-acrylamide-2-methyl propanesulfonic acid, acrylic acid and sodium humate into water, stirring to dissolve, then regulating pH value to be 7-11, heating up to 50 DEG C-70 DEG C, aerating nitrogen for 25-35 minutes, then adding initiator in nitrogen condition, stirring for reacting for 2-4 hours, cooling down to room temperature, then shearing to pelletize, stoving, smashing so as to obtain the filtrate reducer.

Description

technical field [0001] The invention relates to a fluid loss reducer for oil drilling construction and a preparation method thereof. Background technique [0002] With the scarcity of oil resources and the need to meet people's production and living needs, the oil and gas development of deep wells and ultra-deep wells has become inevitable. However, due to the limitation of mining technology, the oil and gas resources in deep formations cannot serve human beings well. The specific manifestations are: deep wells and ultra-deep wells have high downhole temperature and pressure, and the formation structure is relatively complex. During the drilling process, high-pressure oil and gas layers and brine layers are often encountered. Under such circumstances, it is difficult for people to solve technical problems such as unstable performance of drilling and completion fluid and high filtration rate. During drilling operations, downhole complex accidents such as downhole collapse an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/035C08F289/00C08F220/56C08F220/58C08F220/06C08F4/40
CPCC08F289/00C09K8/035C08F220/585
Inventor 郝延顺徐用军邓茜珊田明
Owner 大庆精诚化工有限责任公司
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