Multi-stage fracturing intelligent control system

Abstract

The invention discloses a multi-stage cracking intelligent control system. An outer information writing coil is mounted on the outer wall of a main body and is used for writing the deep information of a current intelligent casing sliding sleeve into an intelligent sliding sleeve RFID (Radio Frequency Identification) tag; an inner coil is mounted on the inner wall of the main body; an intelligent cracking and positioning tube string, a coiled tubing vehicle and an RFID tag feeding device are mounted in series on a coiled tubing; the coiled tubing vehicle and the RFID tag feeding device are positioned on the ground; the coiled tubing vehicle is used for controlling the descent of the coiled tubing; the RFID tag feeding device is used for feeding an information downloading RFID tag, carrying preset information, into the coiled tubing; an RFID tag reader is used for reading RFID tags at corresponding positions inside the tube string and outside the tube string; a control and positioning circuit is connected to the RFID tag reader and a mud pulse generator and is used for controlling the mud pulse generator to upload the deep information to a mud pulse signal receiver when the RFID tag reader reads the deep information in the intelligent sliding sleeve RFID tag. The multi-stage cracking system is simple and reliable.

Description

technical field [0001] The invention relates to the field of oil drilling, in particular to a multi-stage fracturing intelligent control system. Background technique [0002] In many cases, a single oil and gas well will pass through multiple oil and gas layers, requiring multi-oil and gas layer composite development. As the well depth continues to increase, the involved completion operations are becoming more and more complex, such as multi-stage fracturing operations. The fracturing operation performs hydraulic fracturing on different intervals to increase oil drainage channels and improve the recovery effect of the intervals. At present, the most commonly used method for fracturing operations is one-shot fracturing step by step, and after fracturing, all layers are merged and exploited. However, when the fracturing effect of a certain layer is not good and needs to be fractured again, the fracturing operation cannot be carried out again, which will affect fracturing eff...

AI Technical Summary

Problems solved by technology

At present, the most commonly used method for fracturing operations is one-shot fracturing step by step, and after fracturing, all layers are merged and exploited. However, when the fracturing effect of a certain layer is not good and needs to be fractured again, the fracturing operation cannot be carried out again, which will affect fracturing effect, and interlayers interact with each other during joint production, and it is impossible to switch on and off a single layer. When a single layer has a serious problem, it will affect the overall production of the well, and even cause the well to be scrapped, making it impossible to increase production for a long time

In addition to one-time ball-dropping fracturing, a small number of multi-stage fracturing methods have appeared, but they often have disadvantages such as low positioning accuracy of intervals, complicated operation process, and low reliability, which are difficult to meet the multi-stage fracturing required by intelligent well completion. Cracking operation demand

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