Sector cement bond logging instrument
A technology of cement cementation and logging instrument, which is applied in construction and other directions to achieve the effect of fine detection range
Inactive Publication Date: 2012-08-15
THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology
[0004] The purpose of this application is to solve the problem that ordinary variable density logging tools and conventional sector logging tools cannot accurately display the cementation of the first interface, and when encountering fast formation , the problem of mismeasurement occurs, and a sector cement bonded logging tool is provided
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Embodiment 1
[0014] Embodiment one: see figure 1 , figure 2 with image 3 , a sectoral cement bond logging tool, the two ends of the acoustic system 10 are the upper joint 1 and the lower joint 9 respectively, and the acoustic wave emitting source and the acoustic wave receiving source are arranged between the two joints, wherein the acoustic wave emitting source adopts a monopole transmitting transducer The device 1 is located at the rear side of the sealing plug 2 of the upper joint. The distance from the sound wave emission comes from the sound wave receiving source with different functions set from near to far, followed by a single-pole receiving transducer 5 at the bottom of the 1ft position (1 foot away from the sound source), and a sector receiving transducer at the 2ft position. Acoustic wave receiving source 7, the acoustic wave receiving source 8 of 5ft position of energy device 6,3ft position.
[0015] Among them, the monopole receiving transducer 5 at the 1ft position tran...
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The invention discloses a sector cement bond logging instrument which comprises a sound wave transmitting source on a sound system and a 3ft sound wave receiving source and a 5ft sound wave receiving source on the sound system, wherein the sound wave transmitting source is a monopolar transmitter; a monopolar receiving transducer detecting the fast formation is arranged at 1ft position; when in logging, the monopolar receiving transducer transfers the head-wave amplitude of the position and the arrival time to a ground numerical control system so as to monitor whether the fast formation is encountered or not; and a 10-sector receiving transducer is arranged at the 2ft space position. According to the invention, the problem of fast formation in logging is solved; when the propagation velocity of the sound wave in the formation is greater than that in a sleeve, the sound wave is received by the conventional 2ft sector and 3ft acoustic amplitude, and the obtained waveform is possibly a formation wave which can be identified by the sector cement bond logging instrument disclosed by the invention so as to avoid the logging interpretation error; and the downhole instrument reflects the bonding condition of the first interface more delicately and accurately.
Description
[0001] Technical field: [0002] The invention relates to a well logging instrument in the field of petroleum exploitation, in particular to a sector cemented well logging instrument with an optimized structure. Background technique: [0003] When performing cased hole acoustic logging, the common variable density acoustic logging tool is commonly used, which generally includes two detection functions, that is, acoustic amplitude logging with a source distance of 3 ft (displaying the cementation of the first interface) and a source distance of 5 ft. The full wave train log of (showing the cementation of the first interface). Since the 3ft source distance is non-directional reception, when affected by factors such as micro-annulus and mud performance changes, it is impossible to identify trenches of a certain size and their orientation. At present, some sectoral cement bonded logging tools have appeared in the domestic and foreign markets, but these tools usually have a large...
Claims
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IPC IPC(8): E21B47/005
Inventor 邓方青李维柳杨熊长华夏济根杨铖郭建波翟合娟宋海军陈小剑殷艳利郭永胜
Owner THE 22ND RES INST OF CHINA ELECTRONICS TECH GROUP CORP