CAJ | 학술논문

霍尔果斯背斜、玛纳斯背斜及吐谷鲁背斜同属准噶尔盆地南缘山前褶皱带第2排构造,这3大构造是早期褶皱与后期断层突破及中深部双层构造的叠加组合.对于这样的复杂构造,常规的速度分析与构造转深误差较大,针对存在的问题,三维模型模拟迭代这一变速成图方法非常适合南缘复杂构造的时深转换.该方法实现由地震叠加速度形成转深层速度模型,叠加速度谱的拾取强调解释层位与断裂的控制.三维模型模拟迭代变速成图方法提高了准南复杂构造成图精度,在霍、玛、吐背斜带构造成图的应用中取得了良好效果.
곽이과사배사、마납사배사급토곡로배사동속준갈이분지남연산전습추대제2배구조,저3대구조시조기습추여후기단층돌파급중심부쌍층구조적첩가조합.대우저양적복잡구조,상규적속도분석여구조전심오차교대,침대존재적문제,삼유모형모의질대저일변속성도방법비상괄합남연복잡구조적시심전환.해방법실현유지진첩가속도형성전심층속도모형,첩가속도보적습취강조해석층위여단렬적공제.삼유모형모의질대변속성도방법제고료준남복잡구조성도정도,재곽、마、토배사대구조성도적응용중취득료량호효과.
Huoerguosi. Manasi.Tugulu Anticlines belonged to the second row structures in piedmont thrust-fold belts in south margin of Junggar Basin. It was a superimposed combination shaped by early fold and late thrust breakthrough as well as mid-deep structures. As a result, its structure was very complex, the traditional methods of analyzing velocity and making depth map would cause relatively large errors. In allusion to the problems, the method of 3D modeling iteration in time-depth conversion was suitable to the time-depth conversion of complicated structures in the south margin of Junggar Basin. In this method, an interval velocity model was built from velocity spectrum constrained by reflection interfaces and fault planes. The application shows that the method can improve the accuracy of mapping of time-depth conversion,especially in Huoerguosi-Mansi-Tugulu high-steep structural belts of South Junggar Basin.