应用相干技术和孔隙度反演技术进行储层预测——以四川盆地DFC构造为例  

Application of Coherent Analysis and Porosity Inversion for Reservoir Prediction: A Case of DFC Structure in Sichuan Basin

作　　者：熊艳[1,2] 巫芙蓉[2] 蒋骥[2] 张孟[2] 

机构地区：[1]同济大学海洋与地球科学学院 [2]四川石油管理局地球物理勘探公司物探研究中心

出　　处：《海相油气地质》2005年第2期57-60,共4页Marine Origin Petroleum Geology

摘　　要：运用相干分析和孔隙度反演对四川盆地DFC构造的下三叠统嘉二1至嘉一段储层进行了裂缝和孔隙度预测,并给出了有利储层分布。DFC构造发育两条主要断层,其相干异常分为四类:条带状、线状、团块状、点状。带状或线状异常沿断层分布,比较发育,是断层或裂缝的反映;团块状异常较发育,但方向性不强,可能是地下溶洞、溶孔、微细裂缝密集地带或多组小规模断裂交织而成的破碎带的综合响应,还可能是储层物性变化所致。DFC构造的储层,平均孔隙度相对较低,大部分为2%左右,属Ⅳ类储层,少部分为Ⅲ类,只有与裂缝、溶洞相结合才能形成有效储层。Coherent analysis and porosity inversion were applied in Lower Triassic Jialingjiang reservoir on DFC structure in Sichuan Basin for predicting fractures and porosity, and then the distribution of favorable reservoir can be described in the light of the prediction. Four patterns of abnormities on coherent slices, which are stripped, linear, blocked and spotted, are identified. The stripped and linear patterns,which usually reflect faults and fractures,develop along faults. The blocked shape maybe is the integrated reflection of the dissolved caverns,dissolution pores and fine fissures zone, or response of varied reservoir properties else. The average porosity mostly is low (about 2%) in Jialingjiang 2 and 1 Member reservoirs. Only those that link with fractures and dissolved pores can be favorable,or be the fracturing and/or dissolved pore reservoirs.

关 键 词：四川盆地 DFC构造 相干技术 孔隙度反演技术 储层预测 油气勘探 

分 类 号：P618.130.21[天文地球—矿床学]