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Solid phase-free microfoam drilling fluid and preparation method thereof

A technology without solid phase and drilling fluid, which is applied in the field of oil drilling, can solve the problems of difficult protection and discovery of oil and gas layers, blockage of gas and gas layer pores, long waiting time, etc., achieve good thermal stability and settlement stability, and suppress water The effect of dispersing chemical expansion and reducing damage

Inactive Publication Date: 2018-03-09
盘锦百利化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The current micro-foam drilling fluid system contains a relatively large amount of bentonite, which requires pre-hydration and slurry preparation. The process is complicated and the waiting time is long; layer, it is difficult to protect and discover oil and gas layers to the maximum extent

Method used

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  • Solid phase-free microfoam drilling fluid and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Weigh 50 parts of calcium carbonate (particle size: 200-250 mesh), 18 parts of formate, 90 parts of water, 0.3 parts of viscosifier, 4 parts of fluid loss reducer, 6 parts of lubricating and anti-slumping agent, and 2 parts of type regulator, 4 parts of foam stabilizer, 1 part of foaming agent and 2 parts of self-adaptive plugging agent, add them to the mixer in turn and stir at normal temperature and pressure, stirring speed 100-150r / min, stirring time 2- 5h, the finished product is obtained.

Embodiment 2

[0024] In parts by weight, 55 parts of calcium carbonate (particle size: 200-250 mesh), 15 parts of formate, 95 parts of water, 0.5 parts of viscosifier, 5 parts of fluid loss reducer, 6 parts of lubricating and anti-slumping agent, flow pattern adjustment Add 3 parts of foam stabilizer, 4 parts of foam stabilizer, 2 parts of foaming agent and 1 part of self-adaptive plugging agent, add them to the mixer in turn and stir at normal temperature and pressure, stirring speed 100-150r / min, stirring time 2-5h, That is the finished product.

Embodiment 3

[0026] Weigh 58 parts of calcium carbonate (particle size: 200-250 mesh), 19 parts of formate, 100 parts of water, 0.8 parts of viscosifier, 7 parts of fluid loss reducer, 6 parts of lubricating and anti-slumping agent, and 4 parts of type regulator, 5 parts of foam stabilizer, 1 part of foaming agent and 1 part of self-adaptive plugging agent, add them to the mixer in turn and stir at normal temperature and pressure, stirring speed 100-150r / min, stirring time 2 -5h, the finished product is obtained.

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Abstract

The invention belongs to the technical field of petroleum drilling, and relates to a solid-free microfoam drilling fluid and a preparation method thereof. The solid-phase micro-foam drilling fluid of the present invention is prepared from the following raw materials in parts by weight: 50-60 parts of calcium carbonate (particle size: 200-250 mesh), 10-20 parts of formate, 90-100 parts of water, Viscosifier 0.1-1 part, fluid loss reducer 3-8 parts, lubricating anti-slump agent 5-7 parts, flow regulator 1-5 parts, foam stabilizer 3-5 parts, foaming agent 1-3 parts And adaptive blocking agent 1‑2 parts. The solid-free micro-foam drilling fluid of the invention has the advantages of high density, strong inhibition, non-toxicity, easy biodegradation, strong reservoir protection ability, simple operation of the preparation method and the like.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, and relates to a solid-free microfoam drilling fluid and a preparation method thereof. Background technique [0002] At present, with the long-term development of my country's oilfields, most of the old oilfields have entered the late stage of development, and the reservoirs in the oilfields are mainly water-wet sandstones, which are highly permeable or fractured and easy to leak. Fractures are prone to severe leakage and differential pressure sticking, and conventional drilling fluids are not easy to drill through depleted formations. In order to overcome this problem, it is necessary to continuously improve the performance of drilling fluid. [0003] Drilling fluid is the blood of drilling, and it is a very important component in the drilling process. On the one hand, it is related to fast, high-quality, and safe drilling; at the same time, it has a direct impact on protecting and l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/10C09K8/38
CPCC09K8/10C09K8/38C09K2208/12C09K2208/34
Inventor 张庆军
Owner 盘锦百利化工有限公司
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