Plugging removal method of oil well wellbore
A wellbore and oil well technology, applied in the field of oil well wellbore plugging removal, can solve the problems of poor plugging removal effect of oil wells and other problems
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Embodiment 1
[0046] The wellbore deblocking method of oil wells provided in this example is used to deblock the clogging objects in the wellbore. By adopting step-by-step deblocking, the effective deblocking of the wellbore with serious blockage is realized, and the wax scraping sheet cannot be used in the wellbore with severe blockage. down the issue.
[0047] figure 1 It is a schematic flow chart of the oil well wellbore plugging removal method provided by Embodiment 1 of the present invention, figure 2 It is a schematic diagram of the connection of each equipment when pressurization is provided in Embodiment 1 of the present invention. The method for unblocking the wellbore of an oil well includes the following steps:
[0048] Step 101, detecting the size of the opening inside the shaft.
[0049] In this embodiment, when the blockages such as colloid and asphaltene on the inner wall of the wellbore increase, the diameter of the inside of the wellbore will decrease, so the number of b...
Embodiment 2
[0069] image 3 It is a schematic flow diagram of the oil well wellbore plugging removal method provided by Embodiment 2 of the present invention, specifically including as follows:
[0070] Step 101, detecting the size of the opening inside the shaft.
[0071] Step 102. Determine the clogging level in the wellbore according to the size of the opening. The clogging level includes: mild clogging and severe clogging. If it is judged that the clogging level is severe clogging, go to step 103, and if it is judged to be mild clogging, go to step 104.
[0072] Step 103, when it is judged that the clogging level in the wellbore is severe clogging, use a dissolving agent to pressurize and squeeze the inner wall of the wellbore.
[0073] Step 104: When it is judged that the clogging level in the wellbore is mild clogging, expand the nozzle diameter of the oil well so that the high-temperature fluid in the wellbore flows out to the wellhead to flush the inner wall of the wellbore.
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Embodiment 3
[0082] Figure 4 It is a schematic flow chart of the oil well wellbore plugging removal method provided in Embodiment 3 of the present invention, Figure 5 It is a schematic diagram of the connection of equipment during thermal flushing in the oil well wellbore plugging removal method provided in Embodiment 3 of the present invention. In this embodiment, the plugging removal is carried out in the ways of "one expansion", "two squeezing" and "three washings". Specifically, Including the following steps:
[0083] Step 101, detecting the size of the opening inside the shaft.
[0084] Step 102. Determine the clogging level in the wellbore according to the size of the opening. The clogging level includes: mild clogging and severe clogging. If it is judged that the clogging level is severe clogging, go to step 103, and if it is judged to be mild clogging, go to step 104.
[0085] Step 103, when it is judged that the clogging level in the wellbore is severe clogging, use a dissolvi...
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Abstract
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