川西孝新合地区雷口坡组礁滩储集层地震预测

Seismic Prediction of Leikoupo Reef-Bank Reservoirs of Middle Triassic in XXH Area in Western Sichuan Basin

在对礁滩储集层进行地震正演分析基础上,建立礁滩相储集层的地震响应模式,通过地震属性优选,认为地震反射强度、能量分频扫描等属性对岩性特征都有较好的刻画能力。从区域膏盐岩展布特征、钻井资料、滩体地质模型正演分析、地震反射波形、滩体速度等方面与已知滩相普光气田地震反射特征进行对比分析,论证礁滩储集层地震预测的可靠性。综合应用地震属性反射强度与频谱成像技术进行礁滩储集层预测,发现4个呈南西—北东向成排成带分布的礁滩储集层发育有利区。

The seismic forward modeling of the Leikoupo reef-band reservoirs of the Middle Triassic in Xiaoquan-Xinchang-Hexinchang gas field （XXH area） in western Sichuan basin is presented, based on which the seismic response model for such reservoirs is developed. By the seismic attribute optimization, it is suggested that the seismic reflection intensity and energy frequency scanning are helpful to the li- thology characterization. The regional distribution of gypsum Salt, drilling data, bank-body geologic model forward analysis, seismic reflec- tion and seismic velocity are compared with those from Puguang gas field, indicating the seismic prediction of reef-bank reservoirs is reli- able.-Also, this paper points out four favorable areas of such a reservoir development extending in SW-NE in zonality.