Faust Improved Algorithm for Formation Acoustic Time Difference and Its Application

doi:10.3969/J. ISSN.1006-768X.2022.03.02

Drilling & Production Technology ›› 2022, Vol. 45 ›› Issue (3): 9-14.DOI: 10.3969/J. ISSN.1006-768X.2022.03.02

• DRILLING TECHNOLOGY • Previous Articles Next Articles

Faust Improved Algorithm for Formation Acoustic Time Difference and Its Application

WANG Pan¹,HU Yitao¹,LIU Ting¹,CHENG Leli²

1.Sino-French Bohai Geological Service Co. LTD., Tianjing 300457, China; 2.Institute of Logging Technology and Engineering, Yangtze University, Jingzhou, Hubei 434020, China

Online:2022-05-25 Published:2022-06-28

地层声波时差的Faust改进算法及应用

王盼¹,胡益涛¹,刘挺¹,程乐利²

１中法渤海地质服务有限公司２长江大学录井技术与工程研究院

作者简介:王盼（1990-），工程师，2013年毕业于长江大学勘查技术与工程专业，现在中法渤海地质服务有限公司湛江分公司从事PreVue随钻压力监测工作。
基金资助:
中海石油（中国）有限公司综合科研课题“双孔介质储层测录井综合评价技术与作业方案优化研究”（编号：YXKY-2020-ZJ-01）。

Abstract

Abstract:

LWD logging data are commonly used in formation pore pressure monitoring and calculation. However, in the process of formation pore pressure monitoring, LWD data are often undetectable due to engineering reasons or missing due to formation reasons. Therefore, Faust formula is often used to fit the LWD. Practice shows that the relative error between the fitted acoustic time difference and the measured acoustic time difference is more than 5%. Therefore, this paper improved the traditional Faust formula by removing the vertical depth parameter in the traditional Faust formula and changing the formula. The offshore drilling practice concluded that the relative error between the acoustic time data calculated by the improved formula fitting calculation and the measured acoustic data can be controlled within 5%, and the formation pressure coincidence rate calculated with the fitting of acoustic time is of over 97%, which can meet the demand of field operation, and this formula can be also used for LWD tool logs and wireline tool logs.

Key words: acoustic time difference method, formation pressure monitoring while drilling, conventional Faust formula, improved formula, fitting acoustic wave

摘要： 随钻声波时差测井数据为随钻地层孔隙压力监测计算的常用数据，但在钻井现场地层孔隙压力监测过程中，经常会因为工程原因导致随钻声波时差数据不可测得或地层原因中途缺失，常利用Faust公式对声波时差进行拟合，实践表明拟合声波时差与实测声波时差相对误差在5%以上。因此，文章将传统Faust公式进行改进，移除传统Faust公式中的垂深参数，并更改公式形式。经海上钻井实践得出：使用改进公式拟合计算的声波时差数据与实测声波数据相对误差能控制在5%以内，进而利用拟合声波时差计算的地层压力符合率在96%以上，可满足现场作业需求，且该式可同时用于随钻工具测井数据和电缆工具测井数据中。

关键词: 声波时差法, 随钻地层压力监测, 传统Faust公式, 改进公式, 拟合声波

WANG Pan, HU Yitao, LIU Ting, CHENG Leli. Faust Improved Algorithm for Formation Acoustic Time Difference and Its Application[J]. Drilling & Production Technology, 2022, 45(3): 9-14.

王盼, 胡益涛, 刘挺, 程乐利. 地层声波时差的Faust改进算法及应用[J]. 钻采工艺, 2022, 45(3): 9-14.

References

[1] 郭齐军, 瞿辉. 测井声波时差在地层压力预测中的应用[J] . 中国海上油气(地质) ,1997, 11 (1) : 66-68.
GUO Qijun, QU Hui. Applicaiton of interval transit time to predicting formation pressure [J] . China Offshore Oil and Gas( Geology),1997,11 (1): 66-68.
[2] 桂仲喜.声波重构曲线反演技术的研究与应用[D] .北京: 中国地质大学(北京),2010.
GUI Zhongxi. The Research and application of acoustic curve reconstructing techniques in constrain inverse [D].Beijing: China University of Geosciences (Beijing),2010.
[3] 陈钢花,王永刚.水基泥浆的侵入对声波测井曲线的影响及校正[J].石油物探,2005,44(6):609-611.
CHEN Ganghua, WANG Yonggang. The influence and correction of water base mud on acoustic logging[J].Geophysical Prospecting for Petroleum, 2005, 44(6) : 609 611.
[4] 周韬,柳超超.拟声波曲线重构技术在储层预测中的应用[J] .石油地质与工程, 2012,26( 4) : 52-54.
ZHOU Tao, LIU Chaochao. Application of pseudo acoustic curve reconstruction technique in reservoir prediction[J] . Petroleum Geology and Engineering, 2012, 26(4):52-54.
[5] 陈钢花, 王永刚. Faust 公式在声波曲线重构中的应用[J] .勘探地球物理进展, 2005, 28(2) : 125-128.
CHEN Ganghua, WANG Yonggang. Application of Faust equation in rebuilding of acoustic curve[ J] . Progress in Exploration Geophysics,2005, 28(2):125-128.
[6] 王遂正, 张兴岩. 分地层法构建声波测井曲线[J] . 中国煤炭地质, 2009, 21 ( 增 2) : 114 117.
WANG Suizheng, ZHANG Xingyan. Layered sonic logging traces building[ J] . Coal Geology of China, 2009,21 (S2):114=117.
[7] 张鸣, 宁松华. 重构曲线在地震反演中的应用[J].断块油气田, 2008, 15(2):34-36.
ZHANG Ming, NING Songhua. Application of reconstructing curve in seismic inversion[J].Fault Block Oil & Gas Field, 2008, 15(2):34-36.
[8] 彭长勇, 代宗仰, 何志强. 测井电阻率随埋深增加而增加的现象及其原因[J].西部探矿工程,2008,20
(10):81-83.
PENG Changyong, DAI Zongyang, HE Zhiqiang. Phenomenon and reason of logging resistivity increasing with buried depth [J] . WestChina Exploration Engineering,2008,20(10):81-83.
[9] 王盼, 刘挺, 唐峰. 基于 Gardner 公式的岩石密度优化算法[J] .录井工程, 2016, 27(4):12-15.
WANG Pan, LIU Ting, TANG Feng. Rock density optimization algorithm based on Gardner formula [J] . Mud Logging Engineering, 2016,27(4):12-15.
[10] 廖茂辉.多元回归方法校正扩径对密度曲线声波曲线的影响[J].物探与化探, 2014, 38(1):174-179.
LIAO Maohui. The application of multiple regression method to the calibration of the influence of hole enlargement on density and acoustic logs [J] .Geophysical andGeochemical Exploration, 2014, 38(1):174-179.
[11] 胥雪炎, 李补喜. 不同被解释变量选择对决定系数 R2的影响研究[J] .太原科技大学学报, 2007, 28 (5):363-365.
XU Xueyan, LI Buxi. Research on the effect of selectionof dependent variables on R2 statistic [J].Journal ofTaiyuan University of Science and Technology, 2007,28(5):363-365.

Faust Improved Algorithm for Formation Acoustic Time Difference and Its Application

地层声波时差的Faust改进算法及应用

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