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Oil base drilling fluid fracture leakage stoppage formula

An oil-based drilling fluid and leakage technology, applied in the directions of drilling compositions, chemical instruments and methods, etc., can solve the problems of poor crack plugging and pressure-bearing effect, not well solved, easy agglomeration and poor dispersion effect, etc. , to achieve the effect of improving the success rate of plugging, high compressive strength and good dispersion performance

Active Publication Date: 2016-04-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Patent application 201410428352.7 discloses "an oil-based drilling fluid fracture plugging agent" composed of oil swelling materials, deformed particles, fiber materials, plugging materials, ultrafine calcium carbonate and surfactants, the oil-based drilling fluid plugging agent It is suitable for leak prevention and plugging requirements in high permeability and fractured leakage formations. For fractures ≤ 4mm, the compressive strength can reach more than 7MPa. However, the rigid material ultrafine calcium carbonate in this composite anti-leakage agent is a hydrophilic material. The base drilling fluid is easy to agglomerate and disperses poorly, and the plugging and pressure bearing effect for fractures larger than 4mm is not good
[0005] From the results of domestic literature research, it can be seen that oil-based drilling fluid fracture-type lost circulation has not been well solved, and the development of oil-based drilling fluid fracture-type plugging products is still a problem that is of great concern and urgently needed to be solved in the domestic petroleum engineering field

Method used

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  • Oil base drilling fluid fracture leakage stoppage formula
  • Oil base drilling fluid fracture leakage stoppage formula
  • Oil base drilling fluid fracture leakage stoppage formula

Examples

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Embodiment 1

[0021] This embodiment provides a drilling fluid fracture-type leakage plugging formula, including A component and B component, the A component is composed of fiber materials with a diameter of 0.01 mm to 1.00 mm and a length of 0.50 cm to 10.00 cm. The B component is composed of different lipophilic rigid particle materials.

[0022] The plugging principle of the oil-based drilling fluid fracture type leakage plugging formula of the present invention is to use a series of fiber materials (component A) for oil-based drilling fluid plugging to form a rapid water loss sealing layer in the oil-based drilling fluid leakage fracture channel, and then The lipophilic rigid granular material (component B) enters the plugging layer to block and restrict penetration. The two components of A and B act synergistically to achieve the effect of plugging and controlling leakage. The oil-based drilling fluid fracture-type leakage plugging formula can significantly improve the success rate of ...

Embodiment 2

[0024] On the basis of Example 1, put 20 parts of fibers with a diameter of 0.01 mm, 30 parts of fibers with a diameter of 0.05 mm, and 50 parts of fibers with a diameter of 0.50 mm, and put them in a mixing device for uniform mixing to obtain the oil-based drilling fluid fracture-type leakage plugging Formulation A component.

[0025] The fiber material used in this embodiment is one or more of modified wood fibers, polypropylene fibers, multi-block polyurethane elastic fibers, and polybutylene terephthalate fibers.

[0026] Put 30 parts of organic soil, 20 parts of 1250 mesh talc powder, 30 parts of 2500 mesh talc powder, 20 parts of 7-40 nanometer hydrophobic modified silica, and mix them uniformly in the mixing equipment to get the oil-based drilling fluid fracture type Leakage plugging formula component B.

Embodiment 3

[0028] Put 15 parts of fibers with a diameter of 0.01mm, 20 parts of fibers with a diameter of 0.05mm, 35 parts of fibers with a diameter of 0.50mm, and 30 parts of fibers with a diameter of 0.70mm, and put them in a mixing device for uniform mixing to obtain the oil-based drilling fluid fracture-type leakage plugging formula A component. The fiber used is one or more of modified wood fiber, polypropylene fiber, multi-block polyurethane elastic fiber and polybutylene terephthalate fiber.

[0029] Put 30 parts of organic soil, 20 parts of 1250 mesh talc powder, 30 parts of 2500 mesh talc powder, 20 parts of 7-40 nanometer hydrophobic modified silica, and mix them uniformly in the mixing equipment to get the oil-based drilling fluid fracture type Leakage plugging formula component B.

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Abstract

The invention belongs to the technical field of drilling fluid additives, and in particular relates to an oil base drilling fluid fracture leakage stoppage formula, comprising a component A and a component B, wherein the component A is composed of a fiber material of which the diameter is 0.01-1.00mm and the length is 0.50-10.00cm, and the component B is composed of different lipophilic rigid granular materials. The oil base drilling fluid fracture leakage stoppage formula provided by the invention can significantly improve the leakage stoppage success rate of oil base drilling fluid and enhance the load bearing capacity of a stratum; and for a crack of 1-5mm, the added amount of a leaking stoppage agent is less than 7%, and the compression strength can reach 7MPa. In comparison with a domestic similar product, the formula has the technical characteristic of higher fracture leakage stoppage compression strength.

Description

technical field [0001] The invention belongs to the technical field of drilling fluid treatment agents, in particular to an oil-based drilling fluid fracture-type leakage plugging formula. Background technique [0002] Oil-based drilling fluid has many advantages such as strong anti-slumping performance, good lubricating performance, good rheological performance, high temperature resistance, and strong anti-pollution performance. Therefore, oil-based drilling fluid has been widely used in domestic tight oil, tight gas and shale oil. , gas horizontal wells and other unconventional oil and gas resource development drilling construction. However, due to the compressibility of oil, oil-based drilling fluids cause large pressure fluctuations in the wellbore, which is easy to form induced fracture loss. At the same time, the unique lubricating and rheological properties of oil-based drilling fluids make it difficult It is easy to be reversely flushed away, so commonly used pluggi...

Claims

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Application Information

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IPC IPC(8): C09K8/46
CPCC09K8/426C09K8/46C09K2208/08C09K2208/10
Inventor 刘伟张小平王勇强俞浩杰赵建震王京光吴超吴满祥胡恒赵海锋曹辉
Owner BC P INC CHINA NAT PETROLEUM CORP
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