Development and Testing of a Portable Acoustic Logging System on Cuttings

WANG Zhizhan; ZHU Zuyang; LI Fengbo; ZHANG Yuanchun; ZHANG Wei; DU Huanfu

doi:10.11911/syztjs.2020141

Volume 48 Issue 6

Nov. 2020

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Petroleum Drilling Techniques > 2020 > 48(6): 109-115. > DOI: 10.11911/syztjs.2020141

WANG Zhizhan, ZHU Zuyang, LI Fengbo, ZHANG Yuanchun, ZHANG Wei, DU Huanfu. Development and Testing of a Portable Acoustic Logging System on Cuttings[J]. Petroleum Drilling Techniques, 2020, 48(6): 109-115. DOI: 10.11911/syztjs.2020141

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Development and Testing of a Portable Acoustic Logging System on Cuttings

WANG Zhizhan^{1, 2,},
ZHU Zuyang^{1, 2},
LI Fengbo^{1, 2},
ZHANG Yuanchun^{1, 2},
ZHANG Wei^{1, 2},
DU Huanfu³

1.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing, 100101, China
2.
Sinopec Research Institute of Petroleum Engineering, Beijing, 100101, China
3.
Geologging Company, Sinopec Shengli Petroleum Engineering Co. Ltd., Dongying, Shandong, 257064, China

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Received Date: June 29, 2020
Revised Date: October 18, 2020
Available Online: October 22, 2020

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Abstract

Abstract

In order to measure the real-time acoustic velocity in the formation while drilling, a portable acoustic logging system on cuttings with high precision was developed based on the research of acoustic logging on cuttings. In the design of this logging system, integrated circuit of pulse generator and oscilloscope was adopted. In addition, software functioning as oscilloscope that could quickly read and store waveform data was studied for this system. By using the ultrasonic transmission method, an ultrasonic probe was used to emit ultrasonic waves with 1 MHz frequency to measure the P-wave velocity and S-wave velocity of the acoustic wave passing through cuttings samples. Results comparisons were conducted on both the laboratory test and the dipole acoustic logging in actual drilling. The results showed that the accuracy of acoustic velocity measurement was more than 98.0%, and the consistency of acoustic logging data of cuttings and wireline acoustic data was greater than 80.0%. This system could not only be used to monitor abnormal formation pressure while drilling, but also to evaluate rock brittleness, compressibility, drillability and wellbore stability in real time.
- cuttings,
- acoustic logging system,
- ultrasonic wave,
- measurement circuit

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