CAJ | 학술논문

我国琼东南盆地深水区勘探程度低,工区内只有一口刚打到研究层段黄流组项部的探井,针对该情况,介绍了一种在无井或少井情况下利用速度谱资料进行地震反演的方法.该方法首先利用离工区较近的井进行有井反演,然后结合有井反演过程的认识,利用速度谱资料提取伪井信息进行伪波阻抗反演,并充分利用已有的地质信息来完善无井反演的结果,最后利用频谱成像技术对反演结果进行验证.结果表明,为了获取准确的伪渡阻抗数据,需要准确的速度谱数据,且在构造比较平缓、能量集中、质量较好的道集提取伪井资料,并充分利用已知地震、地质信息和频谱成像分析结果,可以减小无井反演结果的多解性.
아국경동남분지심수구감탐정도저,공구내지유일구강타도연구층단황류조항부적탐정,침대해정황,개소료일충재무정혹소정정황하이용속도보자료진행지진반연적방법.해방법수선이용리공구교근적정진행유정반연,연후결합유정반연과정적인식,이용속도보자료제취위정신식진행위파조항반연,병충분이용이유적지질신식래완선무정반연적결과,최후이용빈보성상기술대반연결과진행험증.결과표명,위료획취준학적위도조항수거,수요준학적속도보수거,차재구조비교평완、능량집중、질량교호적도집제취위정자료,병충분이용이지지진、지질신식화빈보성상분석결과,가이감소무정반연결과적다해성.
The deepwater area of the Qiongdongnan Basin of China is a new exploring area with sparse wells controlled,and there is only one well drilled to the target of the Huangliu horizon.According to this situation,a seismic inversion method with velocity spectrum data is presented for target areas with sparse or no well controlled.In the methodology,well-constrainted inversion is done firstly with the well near the target areas.Then,combined with the result of the well-constrained inversion,we use the pseudo-acoustic curves which are extracted from velocity spectrum data to do the pseudo-acoustic inversion.And we use the geology information to improve the quality of the pseudo-acoustic inversion.In the end,spectrum imaging is used to test the preudo-inversion result.The result shows that in order to achieve accurate pseudo-acoustic data,precise velocity spectrum data is required.And it is necessary to extract pseudo-well data in the area of gentle structure,energy concentration and good quality.The ambiguity of the pseudo-inversion can be reduced by using the known seismic and geological information as much as possible.