摘要
地质突变现象十分普遍,如断裂、裂缝的发生和油气的聚散,由此导致地震勘探信号的突变。将突变理论应用于地震勘探资料,已进行了较多的尝试,在储层预测、断裂检测中取得了较好效果。通过建立地震信号尖点突变模型,获得了时间域和频率域突跳势的计算公式。提取地震信号突跳势,检验储层油气情况表明:时间域的突跳势与断层裂缝发育程度相关,突跳势越大,裂缝越发育;频率域突跳势与储层油气分布良好对应,即突跳势越大,含油气可能性越高,钻井符合率超过80%。在碳酸盐岩、碎屑岩的孔隙型、裂缝型储层中的应用表明,突变理论可用于不同岩性、不同储集空间的储层预测。
Geologic discontinuities, such as fault, fracture and accumulation and dissipation of oil and gas, are common and can cause abrupt change of seismic signals. Catastrophic theory has been successfully applied to reservoir prediction and fault detection. Equations of catastrophic potential in time domain and frequency domain are established through building cusp catastrophic model of seismic signal and are used to extract catastrophic potential and detect oil and gas potentials of reservoirs. Catastrophic potential in time domain is related with the development of faults and fractures, i.e. the higher the catastrophic potential is, the more developed the fractures are. While catastrophic potential in frequency domain is well correlated with oil and gas distribution in reservoirs, i.e. the higher the catastrophic potential is, the higher the possibility of oil and gas occurring in reservoirs is. Coincidence rate of drilling is over 80%. Its applications to carbonate reservoirs and clastic rock reservoirs of porous and fractured types show that catastrophic theory is applicable to prediction of reservoirs with different lithologies and reservoir spaces.
出处
《天然气工业》
EI
CAS
CSCD
北大核心
2006年第6期47-49,共3页
Natural Gas Industry
关键词
理论模型
地震解释
参数优选
储集层
断裂
裂缝(岩石)
预测
theoretical model, seismic interpretation, parameter selection, reservoir, fault, fracture (rock), prediction
