裂缝储层地震预测技术在锦州25-1南潜山的应用研究

在储层地质与地震响应特征分析的基础上,应用多种地震预测技术对锦州25-1南潜山油藏进行了裂缝储层综合研究。结果表明,根据裂缝储层弹性参数异常以及多同相轴、弱反射、波组特征横向强不连续性和强方位各向异性等地震响应特征,利用地震属性分析、弹性参数反演、应力场分析和方位各向异性分析等技术,能够从不同角度对裂缝分布进行表征,但都存在一定的局限性和多解性;而综合利用多种地震预测技术进行综合分析,可以提高预测结果的可靠性。锦州25-1南潜山裂缝储层发育部位主要集中在东部断块,1、8井区、2井区及3井区是该油藏裂缝最发育的部位。

An application of seismic techniques to predict fractured reservoirs in JZ25-1S buried hill

On a characteristic analysis basis of reservoir geology and seismic response,several seismic prediction techniques are applied to probe into fractured reservoirs in JZ25-1S buried hill.This application demonstrates that the reservoir fracture distribution in the buried hill can be characterized in various aspects by the techniques such as seismic attribute analysis,elastic parameter inversion,stress field analysis and azimuth anisotropy analysis,according to different seismic response features,including anomalous elastic parameters,increasing reflection events,weak amplitude,weak continuity of waves and strong azimuth anisotropy.However,these techniques have some limitation and ambiguity,and only an integrated prediction by using them can improve reliability of the results.In JZ25-1S buried hill,fractured reservoirs mainly developed in the east fault block,and Well Area 1,8,2 and 3 are the most favourable to hydrocarbon exploration.