便携式岩屑声波录井系统研制与测试  

Development and Testing of a Portable Acoustic Logging System on Cuttings

作　　者：王志战 朱祖扬[1,2] 李丰波 张元春[1,2] 张卫 杜焕福[3] WANG Zhizhan;ZHU Zuyang;LI Fengbo;ZHANG Yuanchun;ZHANG Wei;DU Huanfu(State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development,Beijing,100101,China;Sinopec Research Institute of Petroleum Engineering,Beijing,100101,China;Geologging Company,Sinopec Shengli Petroleum Engineering Co.Ltd.,Dongying,Shandong,257064,China)

机构地区：[1]页岩油气富集机理与有效开发国家重点实验室,北京100101 [2]中国石化石油工程技术研究院,北京100101 [3]中石化胜利石油工程有限公司地质录井公司,山东东营257064

出　　处：《石油钻探技术》2020年第6期109-115,共7页Petroleum Drilling Techniques

基　　金：国家自然科学基金企业创新发展联合基金项目“海相深层地层孔隙压力形成机理及预测方法探索”(编号:U19B6003-05-01);国家自然科学基金青年基金项目“弹性波散射衰减对致密砂岩非均质性的响应机制及实验研究”(编号:41704109);国家科技重大专项“低渗透油气藏高效开发钻完井技术”(编号:2016ZX05021-2);中石化石油工程公司科技攻关项目“岩屑声波录井技术研究”(编号:SG18-77J)联合资助。

摘　　要：为了在钻井过程中实时测量所钻地层的声波速度,在研究岩屑声波录井方法的基础上,研制了高精度的便携式岩屑声波录井系统。设计岩屑声波录井系统时,采用了具有脉冲发生器和示波器功能的一体化电路,并研制了能够快速读取、存储波形数据的软件示波器;采用了超声波透射法,通过超声波探头发射1 MHz频率的超声波,测量声波穿过岩屑样品的纵波速度和横波速度。对该系统进行了实验室比对和实钻井偶极子声波测井比对测试,结果表明,声波速度测量精度大于98.0%、岩屑声波和电缆声波数据一致性大于80.0%。利用该系统不仅可以随钻监测地层异常压力,还可以实时评价岩石的脆性、可压性、可钻性和井壁稳定性。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.

关 键 词：岩屑 声波录井系统 超声波 测量电路 

分 类 号：TE142[石油与天然气工程—油气勘探] TE927