CAJ | 학술논문

为了进一步提高松辽盆地高信噪比地震资料的横向分辨能力，开展了小面元叠前逆时偏移处理的探索实践。首先采用理论模型合成逆时偏移脉冲响应，分析了地震数据的道间距与逆时成像面元的关系及其对最终成像结果的影响，提出了采用叠前道集插值处理来消除空间划弧干扰的思路，并在松辽盆地PN地区实际三维地震资料中进行应用。处理结果表明，检波线方向的道间距过大是引入空间划弧干扰的主要原因，通过叠前插值处理能够削弱这种干扰波场，并提高信噪比和横向空间分辨能力，这对于高信噪比地震资料高精度叠前逆时成像处理提供了一种重要的技术指导。
위료진일보제고송료분지고신조비지진자료적횡향분변능력，개전료소면원첩전역시편이처리적탐색실천。수선채용이론모형합성역시편이맥충향응，분석료지진수거적도간거여역시성상면원적관계급기대최종성상결과적영향，제출료채용첩전도집삽치처리래소제공간화호간우적사로，병재송료분지PN지구실제삼유지진자료중진행응용。처리결과표명，검파선방향적도간거과대시인입공간화호간우적주요원인，통과첩전삽치처리능구삭약저충간우파장，병제고신조비화횡향공간분변능력，저대우고신조비지진자료고정도첩전역시성상처리제공료일충중요적기술지도。
In order to improve the horizontal resolution of the high S/N ratio seismic data in Songliao Basin, the exploration on small bin prestack reverse time migration processing was carried out. The synthetic reverse time migration impulse responses with theoretical model were used to analyze the relationship between seismic data’s trace spacing and reverse time imaging bin, together with the effect on the final imaging results. The idea of prestack interpolation processing was presented to suppress the spatial arc noise, which finally was applied to the 3D practical seismic data migration processing of PN area in Songliao Basin. The results showed that, the main cause introducing the spatial arc noise was the large trace spacing along the receiver line direction, which could be suppressed by prestack interpolation processing, and the S/N ratio and the horizontal spatial resolution were improved. Therefore, the proposed method is an important technology guidance for high precision prestack reverse time migration processing of high S/N ratio seismic data.