Ocean deepwater water-based constant-rheology drilling fluid

A drilling fluid and deep-water technology, which is applied in the direction of drilling composition, chemical instruments and methods, etc., can solve problems such as the inability to meet the needs of marine deep-water oil and gas exploration and development projects, increase in viscosity, etc., and achieve strong inhibition and lubrication Sexual and inhibitory effect

Active Publication Date: 2011-11-09
湖北江汉石油技术有限公司
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Problems solved by technology

However, in the current existing water-based drilling fluids, all drilling fluid systems exhibit the characteristics of increasing vis

Method used

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  • Ocean deepwater water-based constant-rheology drilling fluid

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Embodiment 1

[0030] A kind of marine deepwater water-based constant rheological drilling fluid provided by the present invention, wherein the weight percentage of each component is:

[0031] Bentonite: 3%; flow control agent: 6%; inhibitor: 4%; fluid loss control agent: 2%; lubricant: 4%; sodium carbonate: 0.25%; sodium hydroxide: 0.1%; seawater: the balance .

Embodiment 2

[0033] A kind of marine deepwater water-based constant rheological drilling fluid provided by the present invention, wherein the weight percentage of each component is:

[0034] Bentonite: 3%; Flow Control Agent: 4%; Inhibitor: 3%; Fluid Loss Control Agent: 2%; Lubricant: 3%; Sodium Hydroxide: 0.2%; Sodium Bicarbonate: 0.3%; Barite : 20%; seawater: balance.

Embodiment 3

[0036] A kind of marine deepwater water-based constant rheological drilling fluid provided by the present invention, wherein the weight percentage of each component is:

[0037] Bentonite: 2.5%; Flow Control Agent: 5%; Inhibitor: 3.5%; Fluid Loss Control Agent: 2%; Lubricant: 3%; Sodium Carbonate: 0.3%; Sodium Hydroxide: 0.1%; Limestone: 15% ;Sea water: margin.

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Abstract

The invention relates to an ocean deepwater water-based constant-rheology drilling fluid and belongs to the technical field of petroleum drilling engineering chemical agents. The drilling fluid is characterized by comprising the following components in percentage by weight: 2-4% of clay, 3-8% of flow control agent, 2-5% of inhibitor, 1-3% of fluid loss additive, 2-6% of lubricant, 0.1-0.6% of pH regulator, 0-40% of weighting agent and the balance of water. The drilling fluid provided by the invention can be used for solving the problems that the viscosity of the conventional drilling fluid increases at low temperature and decreases at high temperature and reducing the sensitivity of viscosity change along with the temperature of the whole drilling fluid system, thus realizing a constant-rheology state; and the drilling fluid has strong inhibition and lubrication properties and is an effective deepwater low-temperature water-based constant-rheology drilling fluid system.

Description

Technical field: [0001] The invention relates to a marine deep-water water-based constant rheological drilling fluid, which belongs to the technical field of chemical agents for petroleum drilling engineering. Background technique: [0002] Drilling fluid refers to the general term of various circulating fluids that meet the needs of drilling work with its multiple functions in the process of oil and gas drilling. Its main functions are to carry and suspend cuttings, stabilize the well wall and balance formation pressure, cool and lubricate drilling tools, Transmitting hydrodynamic forces and protecting oil and gas layers are important components of drilling engineering technology. [0003] There is a large amount of unexploited oil in the ocean field, especially the oil reserves in the deep water of the ocean are amazing, and deep water drilling operations are an important link in the exploration and development of marine deep water oil and gas resources. Deep water is oft...

Claims

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Application Information

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IPC IPC(8): C09K8/24
Inventor 许明标王昌军由福昌许洁易津津林平
Owner 湖北江汉石油技术有限公司
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