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Salt resistant high-temperature resistant solid-free environment-friendly well drilling and completing integrated working fluid

A high-temperature resistant, solid-free technology, applied in the field of oil drilling, can solve the problems of restricting the development and promotion of solid-free drilling and completion fluids, and achieve the effects of optimizing the overall performance of the system, scientific and rational formulation, and improving stability.

Inactive Publication Date: 2011-04-27
北京千永科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Due to the composition of the solid-free drilling and completion fluid system, the price is often several times that of conventional drilling fluids, especially cesium formate high specific gravity drilling fluid, the cost is as high as 15-20 times. Offshore drilling that is expensive to develop and has strict environmental protection requirements is acceptable. For land oilfields, although solid-free drilling fluids can greatly protect reservoirs and increase oil and gas production, it also limits the large-scale use of solid-free drilling and completion fluids. Area development and promotion

Method used

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  • Salt resistant high-temperature resistant solid-free environment-friendly well drilling and completing integrated working fluid
  • Salt resistant high-temperature resistant solid-free environment-friendly well drilling and completing integrated working fluid
  • Salt resistant high-temperature resistant solid-free environment-friendly well drilling and completing integrated working fluid

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Effect test

Embodiment 1

[0069] The preparation process of the integrated working fluid for high temperature resistance, salt resistance and solid-free environment-friendly drilling and completion of the present invention is as follows:

[0070] (1) According to the designed drilling fluid volume (in 100 cubic meters, the specific gravity is 1.2g / cm 3 For example), prepare the raw materials of formate, tackifier, fluid loss reducer, oil layer protective agent and polyalcohol anti-slump agent;

[0071] (2) Inject 83.9 cubic meters of clean water into the mud preparation tank, add 36.1 tons of formate under stirring, and prepare 100 cubic meters of drilling and completion base fluid with a specific gravity of 1.2:

[0072] (3) In the state of high-speed stirring, add a hydraulic jet pump at the same time, and add 0.4HEC as a thickener to the dosing tank; the dissolution is uniform, and no micelles appear;

[0073] (4) Add 3.0 tons of fluid loss reducer under stirring, if the temperature resistance cond...

Embodiment 2

[0094] A high-temperature and salt-resistant, solid-free, environment-friendly drilling and completion integrated working fluid, each cubic meter of solution contains the following components in the following mass ratios: 10kg formate, 0.5kg thickener, 3.0kg fluid loss reducer, 2.0kg kg oil layer protective agent, 2.0 kg polyalcohol anti-slump agent, and the rest are water.

[0095]According to the designed drilling fluid volume, prepare the raw materials of formate, viscosifier, fluid loss reducer, oil layer protective agent and polymerized alcohol anti-slump agent; inject clean water into the mud mixing tank, and add formic acid while stirring Salt, prepared as base fluid for drilling and completion; under high-speed stirring, add a hydraulic jet pump at the same time, and add a thickener carboxymethyl hydroxyethyl cellulose (CMHEC) into the liquid dispensing tank; dissolve evenly, without glue If the temperature resistance condition is greater than 150℃, the amount of fluid...

Embodiment 3

[0097] A high-temperature and salt-resistant, solid-free, environment-friendly drilling and completion integrated working fluid, each cubic meter of solution contains the following components in the following mass ratios: 260kg formate, 0.6kg thickener, 4.0kg fluid loss reducer, 3.0kg kg oil layer protective agent, 3.0 kg polyalcohol anti-slump agent, and the rest are water.

[0098] According to the designed drilling fluid volume, prepare the raw materials of formate, viscosifier, fluid loss reducer, oil layer protective agent and polymerized alcohol anti-slump agent; inject clean water into the mud mixing tank, and add formic acid while stirring salt, prepared as base fluid for drilling and completion; under high-speed stirring, add a hydraulic jet pump at the same time, and add a viscosity-increasing agent xanthan gum (HX) to the dosing pool; dissolve evenly, and no micelles can appear; Add fluid loss reducer under stirring. If the temperature resistance condition is greate...

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Abstract

The invention discloses a salt resistant high-temperature resistant solid-free environment-friendly well drilling and completing integrated working fluid. Every cubic meter of the solution comprises the following components by mass: 10-260 kg of formate, 0.5-0. 6 kg of tackifier, 3.0-4.0 kg of fluid loss additive, 2.0-3.0 kg of oil layer protectant, 2.0-3.0 kg of polyol anti-sloughing agent and the balance water. The well drilling and completing integrated working fluid has scientific and reasonable formula and is a salt resistant high-temperature (230 DEG C) resistant solid-free degradable environment-friendly novel working fluid, overcomes the defects of the prior art, has good rheological property, low shear force value, low system filtration loss, good compatibility and low cost and is environment-friendly.

Description

technical field [0001] The invention relates to the field of oil drilling, in particular to an integrated working fluid that is resistant to high temperature, salt, and solid-free and environment-friendly for drilling and completion. Background technique [0002] At present, in the process of petroleum exploration and development, conventional water-based mud or oil-based mud often causes irreparable damage to the reservoir during the drilling process due to its own characteristics, so that wrong conclusions can be drawn in exploration and later development. Unnecessary and high treatment costs; the commonly used barite weighting agent is insoluble and potentially harmful, which also leads to the problem of high cost of waste drilling fluid discharge and treatment. Especially in the case of high temperature, the solid phase particles decomposed by the high temperature degradation of the chemical substances in the drilling fluid will not only make the system performance worse...

Claims

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Application Information

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IPC IPC(8): C09K8/12C09K8/10C09K8/08
Inventor 原玉红
Owner 北京千永科技股份有限公司
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