Open hole well fishbone yield increasing and screen pipe well completion integrated tool

Abstract

The invention relates to the technical field of marine oil and gas resource and sea area natural gas hydrate exploitation equipment, and particularly relates to an open hole well fishbone yield increasing and screen pipe well completion integrated tool. The measures of reservoir reconstruction, sand prevention, production pipe column descending and the like can be completed only through one-time tripping, damage to a reservoir is small, the operation cost is greatly reduced, the construction procedure is optimized, complex procedures are reduced, the operation time is shortened, the sea area natural gas hydrate exploitation economic and technical indexes are increased, the industrialization process is accelerated, and practicability and reliability are improved. The open hole well fishboneyield increasing and screen pipe well completion integrated tool comprises a fishbone branch short section, a sand blocking medium and an outer protection cover, and the sand blocking medium is installed on the outer wall of the fishbone branch short section.

Description

technical field [0001] The invention relates to the technical field of offshore oil and gas resources and natural gas hydrate exploitation equipment in sea areas, in particular to an integrated tool for fishbone stimulation and screen tube completion in open-hole wells. Background technique [0002] As we all know, with the successful implementation of the second round of trial production of natural gas hydrate in sea areas, my country has become the first country in the world to adopt horizontal well drilling and production technology for trial production of natural gas hydrate in sea areas, and has taken another important step in the process of promoting industrialization. There are huge natural gas hydrate resources in my country's sea areas, but how to maximize the production capacity of gas wells and maintain high efficiency and stable production is a major problem at present. The use of reservoir stimulation technology can achieve the purpose of connecting the formatio...

AI Technical Summary

Problems solved by technology

The sand control technology of mechanical screen is simple and convenient for construction, but there are problems that the sand retaining layer is thin and fine sand is easy to intrude and block, which leads to the problem that the output cannot meet the expectation

Especially for hydrate reservoirs with high shale content, the formation sand is extremely fine, and the sand retaining performance and flow performance of the screen are often unable to be taken into account at the same time, so it must be combined with reservoir stimulation technology

[0005] Although the fishbone stimulation technology is widely used in oil and gas fields, it has not been applied to hydrate reservoirs at present. The conventional storage reform and sand control technology requires multiple lifting and lowering of pipe strings to carry out related procedures. The construction is complicated and the daily cost of offshore operations is high. It is still far from meeting the economic requirements of industrialization effects, so it is necessary to optimize and innovate to form an integrated completion tool for storage, modification and sand prevention, so as to greatly reduce offshore operation time, reduce operating costs, improve economic and technical indicators of natural gas hydrate exploitation in sea areas, and accelerate industrialization process

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