中国煤炭地质
中國煤炭地質
중국매탄지질
COAL GEOLOGY OF CHINA
2013年
7期
48-52
,共5页
人工合成地震记录%地质层位标定%时深转换关系%地震子波%反射系数
人工閤成地震記錄%地質層位標定%時深轉換關繫%地震子波%反射繫數
인공합성지진기록%지질층위표정%시심전환관계%지진자파%반사계수
artificial synthetic seismic record%geological horizon standardization%time-depth conversion relationship%seismic wavelet%reflection coefficient
地震层位的标定是地震勘探构造解释的基础，合成地震记录与井旁道对比是层位标定的一个主要方法。层位标定精度除了受地震资料本身的质量及测井资料质量影响之外，制作合成地震记录的准确性取决于地震剖面极性、反射系数、平均速度、地震子波等关键因素的精度。通过介绍确定各种参数的关键技术，提出了在标定地震发射层位中采用的具体方法和标准，如利用相关系数对比时相关系数应大于0.6；利用平均速度对比确定的人工合成地震记录与实际剖面形态差异较小；时深调整前后测井曲线在形态上不应存在差异等。另外为提高对比精度，对目的层段时深关系进行调整时，应结合其他资料，如电性曲线、岩性剖面及钻井地质分层等信息，使之符合地质规律。
地震層位的標定是地震勘探構造解釋的基礎，閤成地震記錄與井徬道對比是層位標定的一箇主要方法。層位標定精度除瞭受地震資料本身的質量及測井資料質量影響之外，製作閤成地震記錄的準確性取決于地震剖麵極性、反射繫數、平均速度、地震子波等關鍵因素的精度。通過介紹確定各種參數的關鍵技術，提齣瞭在標定地震髮射層位中採用的具體方法和標準，如利用相關繫數對比時相關繫數應大于0.6；利用平均速度對比確定的人工閤成地震記錄與實際剖麵形態差異較小；時深調整前後測井麯線在形態上不應存在差異等。另外為提高對比精度，對目的層段時深關繫進行調整時，應結閤其他資料，如電性麯線、巖性剖麵及鑽井地質分層等信息，使之符閤地質規律。
지진층위적표정시지진감탐구조해석적기출，합성지진기록여정방도대비시층위표정적일개주요방법。층위표정정도제료수지진자료본신적질량급측정자료질량영향지외，제작합성지진기록적준학성취결우지진부면겁성、반사계수、평균속도、지진자파등관건인소적정도。통과개소학정각충삼수적관건기술，제출료재표정지진발사층위중채용적구체방법화표준，여이용상관계수대비시상관계수응대우0.6；이용평균속도대비학정적인공합성지진기록여실제부면형태차이교소；시심조정전후측정곡선재형태상불응존재차이등。령외위제고대비정도，대목적층단시심관계진행조정시，응결합기타자료，여전성곡선、암성부면급찬정지질분층등신식，사지부합지질규률。
Standardization of seismic horizon is the basis of seismic prospecting structural interpretation, while the synthetic seismic re-cord and well-side seismic trace contrast is a main method in horizon standardization. Besides impacts from seismic data quality per se and logging data quality to the accuracy of horizon standardization, the exactitude of synthetic seismic record execution lies on accuracy of critical factors of polarity of seismic profile, coefficient of reflection, mean velocity, seismic wavelet etc. Through introduction to vari-ous parameters determination key technology, the specific method and standard adopted in seismic transmitting horizon standardization put forward. Such as if using related coefficient to contrast, it should be larger than 0.6; the artificial synthetic seismic record from mean velocity contrast has smaller difference with actual section configuration;logging trace configurations before and after time-depth adjustment should have no differences etc. Besides, in order to improve contrastive accuracy, when carry out target time-depth adjust-ment, should combine with other information, such as electric curves, lithologic section and borehole geological layering etc. to comply with geological regularity.
