Experimental device and method for simulating the migration and deposition of cuttings returned from deep-water surface drilling

Abstract

Embodiments of the present invention provide an experimental device and method for simulating migration and deposition of cuttings returned from deep-water surface drilling, and belong to the field of marine deep-water oil and gas exploration and development. Use a water pump to pump water to inject water into the tank, and the injected water is guided through the rectifying plate and the deflector grid group in turn to obtain a uniform water flow to simulate the ocean current, and then when the ocean current speed of the simulated ocean current reaches the first preset flow rate Next, the cuttings mixture is injected from the bottom of the tank into the simulated ocean current. This method can simulate the migration and deposition process of cuttings returned from deep-water surface drilling, and solve the problem that the cuttings migration and deposition process is not easy to be observed during drilling. So as to guide the installation of the subsea manifold of the cluster well group.

Description

technical field [0001] The invention relates to the field of marine deep-water oil and gas exploration and development, in particular to an experimental device and method for simulating the migration and deposition of cuttings returned from deep-water surface drilling. Background technique [0002] With the gradual depletion of onshore oil and gas resources, exploration and development activities are gradually shifting to the deepwater field, and the contribution of new oil and gas proven reserves in the deepwater field to the overall new oil and gas proven reserves in the world continues to rise. Strengthening the development of offshore oil and gas resources is of great significance to building a powerful marine country. Many technical challenges will be encountered in deepwater oil and gas drilling operations. In the process of deepwater surface drilling, if no riser is installed, the cuttings generated by surface drilling will be directly flowed back to the seabed, and s...

AI Technical Summary

Problems solved by technology

Many technical challenges will be encountered in deepwater oil and gas drilling operations. In the process of deepwater surface drilling, if no riser is installed, the cuttings generated by surface drilling will be directly flowed back to the seabed, and some will be accumulated near the wellhead, which will affect The risk of subsea wellhead equipment installation; and during the drilling of cluster well groups, some of the returned cuttings will migrate to the center of the well group and accumulate, which will increase the unevenness of the seabed and increase the risk of failure of subsea manifold installation

[0003] The migration and deposition of cuttings returned during deepwater surface drilling is affected by various factors such as ocean current velocity, drilling fluid return displacement, cuttings particle size, and cuttings volume fraction. During drilling, the migration and deposition of cuttings is not easy Observation, at present, during the drilling process of deepwater cluster wells at home and abroad, the installation of underwater manifolds has failed many times due to the increase of seabed unevenness, which has increased the duration of drilling work and increased drilling costs.

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