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Geological exploration method and device

A geological detection and detection technology, applied in the petroleum industry, can solve the problems of noise aliasing and signal attenuation, and achieve the effect of accurate detection

Inactive Publication Date: 2014-04-30
INST OF ACOUSTICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of signal attenuation and noise aliasing caused by long-distance propagation in the current geological exploration in front of the drill bit

Method used

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  • Geological exploration method and device
  • Geological exploration method and device

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Embodiment Construction

[0029] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0030] figure 1 The flow chart of the geological detection method provided by the embodiment of the present invention. Such as figure 1 As shown, the method includes:

[0031] In step 101, the transmitting transducers are combined to transmit acoustic signals, passing through the stratum to reach the object to be detected, and the transmitting transducers are combined into a phased array transducer combination, and the transducer array elements in the phased array transducer combination are according to the amplitude and phase weighted way to load the excitation signal;

[0032] Step 102, the receiving transducer is combined to receive the echo signal reflected by the detected object and passing through the formation;

[0033] Step 103, the control system processes the echo signal, so as to obtain the information o...

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Abstract

The invention relates to a geological exploration method and device. The method includes the steps that a sound wave signal is transmitted by a transmitting transducer combination (namely, a phased array transducer combination) and arrives at an object to be explored through a stratum, and transducer array elements in the phased array transducer combination load exciting signals according to the amplitude and phase weighting mode; echo signals being reflected backwards by the object to be explored and passing through the stratum are received by a receiving transducer combination; the echo signals are processed by a control system, and accordingly information of the object to be explored is acquired. The device comprises the transmitting transducer combination, the receiving transducer combination and the control system. By means of the geological exploration method and device, geological conditions in front of an exploration drill bit can be explored in real time, strong-energy signals are transmitted to places in front of the drill bit by sound source signals provided through the directional sound wave technology, and therefore the purpose of accurate exploration is achieved.

Description

technical field [0001] The invention relates to the field of petroleum industry, in particular to a geological detection method and device. Background technique [0002] In geosteering drilling, real-time and accurate prediction of geological conditions ahead of the drill bit plays an irreplaceable role in ensuring drilling safety, improving the success rate of exploration wells and protecting reservoirs. The wellbore measurement technology based on electrical method and nuclear physics can detect the formation conditions around the wellbore with high resolution, but it is not suitable for detecting the formation structure and its parameters within a large distance in front of the drill bit. In contrast, sound waves can propagate in long-distance formations, and the engineering technology developed based on the principle of sound waves propagating in materials has certain advantages in the detection of geological conditions in front of the drill bit. [0003] At present, tw...

Claims

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Application Information

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IPC IPC(8): G01V1/40G01V1/52
Inventor 张秀梅林伟军王秀明苏畅
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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