Sea fracturing method

A process method and fracturing technology, which is applied in the direction of earthwork drilling, mining fluid, wellbore/well parts, etc., can solve the problems of unusable ship hull and hard steel pipeline connection cannot be placed, so as to solve the problem of pipeline connection and increase Reserves, the effect of increasing production

Inactive Publication Date: 2014-12-24
PETROCHINA CO LTD
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned defects in the prior art, the technical problem to be solved by the present invention is to provide an offshore fracturing process, which solves the problem that the hull cannot be connected by steel hard pipelines due to wind, waves and tides, and the space of the platform is small and it is impossible to place many The problem of fracturing equipment has achieved the goal of organizing and implementing large-scale fracturing at sea

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Fracturing construction steps of well ch39 (first layer 3950.5-3993.6m):

[0037] 1. According to the fracturing geological design, process design and construction design of well ch39 (the first layer 3950.5-3993.6m), start fracturing preparations. Combined with the needs of offshore safety production, the construction operation instruction book, HSE planning book and start-up checklist are prepared.

[0038]2. The offshore operation platform completes the wellbore preparation according to the design requirements of the fracturing process. Complete the fracturing construction string: P11Oφ89mm tubing + Φ89mm inner sliding sleeve hydraulic pump (inner diameter 60mm) + supporting sand cup (inner diameter 59mm) + Φ89mm thickened pup joint 2m + Φ110mm labor pressure gauge support cylinder (inner diameter 52mm) + Φ114mm RTTS seal Spacer (inner diameter 48mm, temperature resistance 150°C) × 3500±0.5m (avoiding the position of the casing collar) + 1 Φ73mm tubing + ...

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PUM

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Abstract

The invention relates to a sea fracturing method. The method includes firstly performing fracturing geological design; mounting a fracturing wellhead, and mounting a fracturing wellhead high-pressure pipeline and connecting to a high pressure hose; loading fracturing equipment, suspending the fracturing equipment to a deck and fixing, concentrating the fluid container area, arranging a fluid feeding pump, a sand container, a sand mixing pump pry, a high-pressure injecting pump unit, a high pressure pipeline assembly and the like sequentially behind, preparing water, feeding material and preparing fracturing fluid; after a fracture construction ship arrives at a platform, adopting a tail laying manner, mooring, connecting to the high pressure hose at the gunwale of the platform, starting all high pressure injection pumps, inspecting circularly, and performing the pipeline pressure test; performing fracture construction according to the designed pump injection progress after the pressure test is qualified. The high pressure pipeline assembly is an assembly connected the high pressure injection pumps and high pressure injection pipeline, and the high pressure injection pumps are power equipment injecting fracture fluid into oil pipes through the high pressure pipeline assembly and the high pressure pipeline. The method is applied to oil testing and fracturing construction of sea exploration and development wells.

Description

technical field [0001] The invention relates to a production stimulation method applied in the offshore oil exploration and development process, in particular to an offshore fracturing process. Background technique [0002] At present, due to high cost and high risk, fracturing is limited to onshore, and there is only a small amount of acidizing at sea. The acidizing construction process is as follows: 1. Carry out acidizing geological design and process design. Work safety guidance content. Complete the construction operation instructions, HSE plan and start-up checklist. 2. Before construction, choose suitable weather conditions: within the estimated construction time, the wind force in the construction sea area is less than 6, and the visibility is greater than 500m. Load two 2000-type pump skids, acid liquid storage tanks and other equipment from the wharf to the cargo ship, prepare the acid liquid for construction on the ship (you can also prepare it first and then in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/26
Inventor 李万强郭秀庭何炳振蔡茂佳李晓祥
Owner PETROCHINA CO LTD
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