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Organic salt high-density drilling fluid

A drilling fluid and high-density technology, applied in the field of drilling fluid, can solve the problems of polluting the environment, affecting oil and gas layer display, and high cost, and achieve the effect of overcoming the pollution environment, meeting the requirements of offshore oil development, and suppressing collapse

Active Publication Date: 2015-05-20
北京奥凯立科技发展股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the above technical problems, the present invention provides an organic salt high-density drilling fluid with high temperature resistance, salt resistance and pollution resistance. Disadvantages of the environment, affecting the display of oil and gas layers and high cost

Method used

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  • Organic salt high-density drilling fluid
  • Organic salt high-density drilling fluid
  • Organic salt high-density drilling fluid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Preferred organic salt

[0019] Add organic salts such as potassium acetate, sodium acetate, sodium oxalate, ammonium acetate, sodium formate, octadecyltrimethylammonium chloride with a mass volume percentage of 2% to the 2% base slurry, and measure its performance parameters , compared with the performance of 2% base pulp, and determined the organic salt with better performance as the main agent. Drilling fluids with different formulations are marked as follows:

[0020] 1.2% base slurry + 2% potassium acetate

[0021] 2.2% base slurry + 2% sodium acetate

[0022] 3.2% base pulp + 2% sodium oxalate

[0023] 4.2% base paste + 2% ammonium acetate

[0024] 5.2% base slurry + 2% sodium formate

[0025] 6.2% base pulp

[0026] 7.2% base slurry + 2% octadecyltrimethylammonium chloride

[0027] Note: In the present invention, the meaning of 2% base slurry is: add 2 grams of sodium bentonite per 100 grams of water, the base slurry formed after 24 hours of hydration a...

Embodiment 2

[0052] 1. According to the above experimental data in Example 1, the formulation of the weighted slurry of organic salt high-density drilling fluid in this example is as follows: 3% base slurry + 2% sodium oxalate + 0.5% PAC142 + 5% lubrication inhibitor + 3% OCL -JB+2%FT-1+3%SPNH+BaSO 4 . The performance parameters of the organic salt high-density drilling fluid in this example before and after hot rolling at 150°C for 16 hours are shown in Table 5:

[0053] Table 5 Performance parameters before and after hot rolling of organic salt high-density drilling fluid in this example

[0054]

[0055] In Table 5, HTHP FL is the high-temperature and high-pressure fluid loss, which is the result of multiplying the fluid loss by 2 at a pressure difference of 3.5 MPa and a measurement time of 30 minutes using a high-temperature and high-pressure fluid loss tester; A certain amount of drilling fluid weighting materials are added to the drilling fluid to increase the density of the dr...

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Abstract

The invention discloses an organic salt high-density drilling fluid. The drilling fluid is composed of 2-4% of base slurry, and 0.2-0.5g of a tackifier, 3-6g of a high-temperature resistant fluid loss agent, 3-10g of a lubricant, 2-4g of an anti-collapse agent and 2-5g of organic salt which are added into 2-4% of the base slurry per 100 milliliter by weight, wherein the 2-4% of base slurry is formed through adding 2-4g of sodium bentonite into water per 100 milliliter through hydration under a room temperature for 24 hours. According to the drilling fluid, the temperature resistant performance can reach above 150 DEG C; the drilling fluid can resist pollution of 10% of sodium bentonite, 10% of NaCl or 0.5% of CaCl2; the lubrication factor reaches below 0.08; and good pseudo oil base and environmental protection performances are provided, and requirements for China offshore oil exploitation can be satisfied. The drilling fluid can solve complex drilling problems of oil fields effectively, and is particularly suitable for drilling horizontal wells for special high-pressure oil and gas accumulations and high-pressure sidetrack horizontal wells.

Description

technical field [0001] The invention relates to a drilling fluid used in petroleum drilling engineering, in particular to an organic salt high-density drilling fluid suitable for drilling horizontal wells of special high-pressure oil and gas reservoirs and high-pressure sidetracking horizontal wells. Background technique [0002] In recent years, with the development of drilling technology, the need to improve the performance of drilling fluid has become more and more obvious while developing horizontal wells and sidetracked horizontal wells in high-pressure oil and gas fields. Although organic salt drilling fluids have been widely used in China, the existing organic salt high-density drilling fluids still have defects such as high soil content, poor rheology, poor inhibition, and uncoordinated mud performance; , Anti-salt and anti-pollution properties are relatively poor. Based on our own situation, our company has researched and developed a new type of organic salt high-d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K8/18
Inventor 王雷周文欣卢丙朵韩晓华卢胜娟王欣王文瑞张晓坡王铁林黄海军
Owner 北京奥凯立科技发展股份有限公司