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Preparation method of ultralow-permeability agent for water-based drilling fluid

A technology of water-based drilling fluid and penetrant, which is applied in the field of oil drilling, can solve the problems of weak pressure bearing capacity and insufficient plugging performance, and achieve the effect of improving plugging capacity, reasonable matching, and solving serious viscosity increase

Pending Publication Date: 2020-10-30
荆州市学成实业有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiencies of related products in the prior art, the present invention proposes a preparation method of an ultra-low permeability agent for water-based drilling fluids, which solves the problems of insufficient plugging performance and weak pressure bearing capacity in the prior art

Method used

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  • Preparation method of ultralow-permeability agent for water-based drilling fluid
  • Preparation method of ultralow-permeability agent for water-based drilling fluid
  • Preparation method of ultralow-permeability agent for water-based drilling fluid

Examples

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Effect test

Embodiment 1

[0029] The components of the added raw materials are as described in Table 1, and the specific steps are: 1) adding 50 parts by weight of a one-way pressure sealing agent to the reactor; 2) adding 4 parts by weight of a low-molecular polymer Mixing and stirring in the reactor; 3) Adding 5 parts by weight of natural polymer into the reactor and mixing and stirring; 4) Adding 15 parts by weight of superfine calcium carbonate and mixing and stirring; 5) Adding 3 parts by weight of mixing and stirring the resin; 6) adding 20 parts by weight of asphalt into the reactor and mixing and stirring; 7) adding 10 parts by weight of mica into the reactor and mixing and stirring; 8) mixing and stirring evenly, discharging and bagging.

Embodiment 2

[0031] The components of the raw materials added are as described in Table 1, and the specific steps are: 1) adding 70 parts by weight of the unidirectional pressure sealing agent to the reactor; 2) adding 5 parts by weight of the low-molecular polymer Mixing and stirring in the reactor; 3) Adding 3 parts by weight of natural polymer into the reactor and mixing and stirring; 4) Adding 10 parts by weight of superfine calcium carbonate and mixing and stirring; 5) Adding 5 parts by weight of mixing and stirring the resin; 6) adding 40 parts by weight of asphalt into the reactor and mixing and stirring; 7) adding 5 parts by weight of mica into the reactor and mixing and stirring; 8) mixing and stirring evenly, discharging and bagging.

Embodiment 3

[0033] The components of the added raw materials are as described in Table 1, and the specific steps are: 1) adding 60 parts by weight of a one-way pressure sealing agent to the reactor; 2) adding 3 parts by weight of a low-molecular polymer Mixing and stirring in the reactor; 3) Adding 4 parts by weight of natural polymer into the reactor and mixing and stirring; 4) Adding 10 parts by weight of superfine calcium carbonate and mixing and stirring; 5) Adding 4 parts by weight of mixing and stirring the resin; 6) adding 30 parts by weight of asphalt into the reactor and mixing and stirring; 7) adding 5 parts by weight of mica into the reactor and mixing and stirring; 8) mixing and stirring evenly, discharging and bagging.

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Abstract

The invention discloses a preparation method of an ultralow-permeability agent for a water-based drilling fluid, and relates to the technical field of petroleum drilling. The preparation method of theultralow-permeability agent for the water-based drilling fluid comprises the following steps: adding a one-way pressure sealing agent into a reactor, adding a low-molecular polymer and a natural polymer, stirring and mixing, adding ultrafine calcium carbonate, resin, modified asphalt and mica, and uniformly stirring and mixing. The preparation method disclosed by the invention is simple and safein process, stable in product quality and strong in plugging property.

Description

technical field [0001] The invention relates to the technical field of petroleum drilling, in particular to a preparation method of an ultra-low permeability agent for water-based drilling fluid. Background technique [0002] In the process of oil drilling, due to the complex formation conditions, when drilling some formations with relatively rich pore development, the drilling fluid penetrates into the formation in large quantities, causing the hydration expansion of the mud shale on the well wall, which in turn leads to the instability of the well wall. There are various downhole complications such as well wall collapse and drill sticking. Therefore, there is an urgent need for an ultra-low permeability agent for water-based drilling fluid, but the quality of the product produced by the prior art is unstable and the plugging effect is relatively poor. [0003] A kind of ultra-low permeability agent for water-based drilling fluid is researched. Through reasonable material ...

Claims

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Application Information

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IPC IPC(8): C09K8/03C09K8/04C09K8/46
CPCC09K8/03C09K8/04C09K8/426C09K8/46
Inventor 叶礼圆罗春芝王越支秦波波周博章楚君赵世贵
Owner 荆州市学成实业有限公司
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