Single-emitting five-receiving sonic system virtual two-emitting five-receiving sonic system method
An acoustic system and acoustic wave technology, which is applied in the acoustic transit time logging, uses a computer to process the acoustic transit time logging data, and can solve the problem of long length of the dual acoustic systems, unfavorable development of the miniaturization of logging tools, and dual acoustic system acoustic logging tools. Complex structure and other problems, to achieve the effect of overcoming complex structure and overcoming the influence of wellbore conditions
Active Publication Date: 2011-04-20
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
Overcoming the influence of wellbore conditions on the sonic logging data obtained by the single acoustic logging tool; at the same time overcoming the complex structure of the dual acoustic logging tool, the length of the dual acoustic logging is longer than that of the single acoustic logging, which is not conducive to the miniaturization of logging tools lack of development
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[0027] Embodiment: refer to accompanying drawing 4. A single-shot and five-receive acoustic transit-time logging tool, which is a typical down-emitting single-shot sound system, has a probe spacing R of 150mm and a probe source spacing L of 600mm.
[0028] When the depth is 0, the data of the lower emission sound system can be directly received and stored in the computer. And the data of the upper emission sound system at depth 0 can be obtained through the following process:
[0029] A. Lift the sound system up to a distance of 600mm, and the obtained travel time of T1R1 is used as the travel time data of the upper sound system T0R5 at depth 0;
[0030] B. Lift the acoustic system up to a distance of 150mm, and the obtained T1R2 travel time is used as the travel time data of the upper acoustic system T0R4 at depth 0;
[0031] C. Lift the sound system up by 150mm, and the obtained T1R3 travel time is used as the travel time data of the upper sound system T0R3 at depth 0;
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A method of virtualizing double-shot five-receiving sonic system with one-shot five-receiving sonic system is provided, which is applied to the interval transmit time well logging in one-shot sonic system, so as to get sound wave data at different depth point and acquire the measurement result for a double sound producing system after computerized processing. The invention is characterized in that: a wellbore complementary double sound producing system can be deemed as comprising a one-shot sonic system with upper transmission and an one-shot sonic system with lower transmission. The one-shotsonic system is provided with a transmission probe, so that the data about the wellbore complementary sound wave of a double sound producing system can be got by acquiring the data about the sound wave of the upper transmission probe. The data about the sound wave of the upper transmission sonic system is got by the replacement of the data about the sound wave in the lower transmission sonic system, which replaces the transmission probe and the receiving probe of the original sound wave and realizes similar measurement effect. Therefore, the invention is able to combine the data about the sound wave of the upper transmission system via the data about the sound wave in the lower transmission sonic system at different depth points. The well logging effect of the double transmission sonic system can be got via computerized processing of the well logging data acquired by the one-shot sonic system.
Description
technical field [0001] The invention relates to the technical fields of petroleum geological exploration and metal mineral deposit survey, in particular to a method for well logging by the sonic time difference method, specifically a method for using a computer to process the well logging data by the sonic time difference method. Background technique [0002] Acoustic transit time logging is an important logging item in petroleum exploration. The acoustic system structure of the original acoustic logging tool is a single-shot acoustic system structure. In the technical field, the sound system is also referred to as the sound system for short. refer to figure 1 . The measurement principle of the acoustic time difference logging tool in the well: an acoustic logging tool with an upper emission sound system, the upper emission probe T emits sound waves and transmits them to the well wall B, from the well wall B to the well wall C and then transmitted back to the instrument r...
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IPC IPC(8): E21B47/14
Inventor 王易安刘建成贾向东邓林陈江同范林黄明艳杨佐新王易敏李文东
Owner BC P INC CHINA NAT PETROLEUM CORP
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