Potassium salt polymer drilling fluid

A technology of drilling fluid and polymer, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve the problems of limited anti-slump effect, poor drilling fluid inhibition ability, and instability of well wall, so as to increase salt resistance, strong inhibitory effect

Inactive Publication Date: 2015-12-09
山东聚鑫化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Drilling fluid plays an important role in the process of oilfield exploitation. During the drilling process, 75% of the mud shale layer is often encountered, and about 90% of the well wall instability problems occur in the mud shale well section. The drilling fluid containing potassium ions The application of mud shale has been well

Method used

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Examples

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Effect test

Example Embodiment

[0010] Example 1

[0011] Material and material weight percentage: Bentonite 3%, sulfonated lignin sulfomethyl phenolic resin copolymer 1%, potassium chloride 2%, potassium polyacrylate 1.5%, limestone powder 8%, sulfonated cottonseed oil 2%, the rest For tap water.

[0012] The above-mentioned raw materials are uniformly mixed at room temperature to obtain the drilling fluid of the present invention.

Example Embodiment

[0013] Example 2

[0014] Material and material weight percentage: Bentonite 10%, sulfonated lignin sulfomethyl phenolic resin copolymer 3%, potassium chloride 1%, potassium polyacrylate 1%, limestone powder 8%, sulfonated cottonseed oil 2%, the rest For tap water.

[0015] The above-mentioned raw materials are uniformly mixed at room temperature to obtain the drilling fluid of the present invention.

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Abstract

The invention relates to potassium salt polymer drilling fluid and belongs to the field of oilfield chemistry. The potassium salt polymer drilling fluid is characterized by containing the following substances in percentage by weight: 3-10% of clay, 1-8% of weighting material, 1-3% of sulfonated lignin sulfomethyl phenol-formaldehyde resin copolymer, 1-1.5% of potassium polyacrylate, 1-2% of potassium chloride, 1-4% of lubricant and the balance of tap water. According to the potassium salt polymer drilling fluid, proportioned materials are simple and are readily available, and the potassium salt polymer drilling fluid has the advantages of high inhibition capability, calcium resistance, salt resistance and collapse prevention and is applicable to oil wells of various depths.

Description

technical field [0001] The invention belongs to the field of oilfield chemistry, and in particular relates to a potassium salt polymer drilling fluid. Background technique [0002] Drilling fluid is the circulating flushing medium used in the hole during the drilling process, also known as drilling flushing fluid. Drilling fluid plays an important role in the process of oilfield exploitation. During the drilling process, 75% of the mud shale layer is often encountered, and about 90% of the well wall instability problems occur in the mud shale well section. The drilling fluid containing potassium ions The application of mud shale dispersion mud has been well controlled, the content of submicron particles and inferior solid phase in drilling fluid has been greatly reduced, and the ROP has been greatly improved. However, with the continuous application of technology, it has also exposed Some disadvantages, such as poor drilling fluid suppression ability and limited anti-slump ...

Claims

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Application Information

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IPC IPC(8): C09K8/24
CPCC09K8/24C09K2208/34
Inventor 于兵张建王岷全王燕
Owner 山东聚鑫化工有限公司
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