CAJ | 학술논문

地震确定性反演、叠后地质统计学反演是目前致密碎屑岩气藏普遍采用的储层预测技术，但针对复杂岩性结构和复杂波阻抗特征的薄储层，这些反演方法的适应性有限。叠前同时反演与地质统计学反演技术的结合是此类储层量化预测的有效方法，不仅可提高纵、横向分辨率，还可解决储层与围岩波阻抗叠置情况下有效储层的识别问题。叠前同时反演技术可以得到纵波阻抗体、横波阻抗体、纵横波速度比体和密度体，能够解决复杂波阻抗储层的识别问题，但反演受地震频带限制，纵向分辨率有限。基于随机建模技术的叠前地质统计学反演方法，能有效地综合地质、测井和三维地震数据，极大地提高预测结果的纵、横向分辨率，实现储层的精细描述，在叠前确定性反演的基础上可以更好地识别薄层及薄互层储层，为陆相致密碎屑岩气藏储层描述提供了重要技术支撑，在川西新场须四气藏储层预测应用效果明显。
지진학정성반연、첩후지질통계학반연시목전치밀쇄설암기장보편채용적저층예측기술，단침대복잡암성결구화복잡파조항특정적박저층，저사반연방법적괄응성유한。첩전동시반연여지질통계학반연기술적결합시차류저층양화예측적유효방법，불부가제고종、횡향분변솔，환가해결저층여위암파조항첩치정황하유효저층적식별문제。첩전동시반연기술가이득도종파조항체、횡파조항체、종횡파속도비체화밀도체，능구해결복잡파조항저층적식별문제，단반연수지진빈대한제，종향분변솔유한。기우수궤건모기술적첩전지질통계학반연방법，능유효지종합지질、측정화삼유지진수거，겁대지제고예측결과적종、횡향분변솔，실현저층적정세묘술，재첩전학정성반연적기출상가이경호지식별박층급박호층저층，위륙상치밀쇄설암기장저층묘술제공료중요기술지탱，재천서신장수사기장저층예측응용효과명현。
The deterministic inversion technology and the post-stack geo-statistics inversion technology have been widely adopted in prediction of tight clastic reservoirs .However,they are not very effective in prediction of thin reservoirs with complex lithologic structure and wave impedance .The combination of the simultaneous inversion technology and the pre-stack geo-statistics inversion technology is effectively applied in the quantitative prediction of such reservoirs .The appli-cation of these technologies can not only improve the vertical and horizontal resolution but also can recognize effective re -servoirs even when the impedances of surrounding rocks and reservoirs are overlapped .Although the pre-stack simulta-neous inversion technology can extract P-wave impedance,S-wave impedance,vP/vS and density,and can recognize reser-voirs with complex impedance ,it has limited vertical resolution due to the limitation of frequency band .Stochastic mode-ling-based pre-stack geo-statistics inversion technology can effectively integrate geological ,logging and 3D seismic data , greatly improve both vertical and lateral resolutions ,thus can realize fine description of reservoirs .Based on deterministic pre-stack inversion ,this technology can effectively identify thin reservoirs and thin interbedded reservoirs .It has been successfully applied to the prediction of reservoirs in the 4th Member of Xujiahe Fm in Xinchang gas field of western Si-chuan Basin , a continental tight clastic gas field .