Oil-gas well multi-level perforation blasting control method based on accelerometer
An accelerometer and control method technology, which is applied to earth-moving drilling, wellbore/well components, and production fluids, etc., can solve the problems of inaccurate detection of detonation instructions, complicated equipment operation, etc., so as to improve the success rate and overcome the influence of interference. Effect
Active Publication Date: 2018-11-27
北方特种能源集团有限公司
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[0005] In order to solve the above technical problems, the present invention provides an accelerometer-based multi-stage perforation initiation control method for oil and gas wells, which solves the problems of complex equipment operation and inaccurate detection of initiation instructions in the existing multi-stage perforation initiation technology
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[0029] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.
[0030] join figure 1 , the present invention is based on figure 1 The application circuit of the multi-stage perforation detonation device for oil and gas wells, in order to improve the accuracy of command recognition, and for the problem of downhole acceleration changes, the following acceleration pulse detonation sequence is proposed (such as figure 2 shown), so as to accurately and safely complete the multi-stage detonation.
[0031] The accelerometer-based multi-stage perforation initiation control method for oil and gas wells proposed by the present invention is a method for detecting the number of acceleration pulse codes within equal intervals. In this method, the detection data is transmitted to the digital controller 7 through the acceleration sensor 8, and the digital controller ...
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The invention discloses an oil-gas well multi-level perforation blasting control method based on an accelerometer. The method includes the steps that detected acceleration data is transmitted to a digital controller through an acceleration sensor, and the digital controller sequentially carries out judgment of the two stages of start judgment and acceleration pulse number detection; at the stage of start judgment, three groups of acceleration pulse signal periods are judged, and judgment of each group of acceleration pulse signal periods comprises a rise judgment stage, a stop stage and a falljudgment stage; after it is detected that the three groups of acceleration pulse signal periods are started, within the fixed blasting detection time period t9-t17 after detection stops for 1 s, whenone acceleration pulse signal period is detected, a first-level blaster blasts; when two acceleration pulse signal periods are detected, a second-level blaster blasts; the rest can be done in the same manner, so that multi-level perforation blasting operation is achieved. By means of the method, the problems that in the existing multi-level perforation blasting technology, equipment operation iscomplex, and blasting instructions are not accurately detected are solved.
Description
technical field [0001] The invention belongs to the technical fields of computer application and electric power electronics, and relates to an accelerometer-based multi-stage perforation detonation control method for oil and gas wells. Background technique [0002] Multi-stage perforation initiation based on pressure coding is a relatively common perforation initiation method for oil wells, but its applicability is relatively poor, and the success rate of initiation is not the same for different well conditions. In the process of perforating oil and gas wells using pressure coding, the wells with better well conditions have good pressure effects, the pressure amplitude changes significantly, and the perforation success rate is higher; for oil wells with poor well conditions, the downhole pressure changes after pressure The perforation success rate is relatively low, and the operation of ground suppression equipment is complicated and cumbersome, resulting in high work pressu...
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IPC IPC(8): E21B43/1185
CPCE21B43/1185
Inventor 罗兴平常昕刘帅闵杰刘正彦王雪艳李嶔莹
Owner 北方特种能源集团有限公司