松南气田营城组火山岩气藏储层预测
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摘要
松南气田发育于松辽盆地长岭凹陷中部断陷带老英台-达尔罕断凸带的腰英台深层断鼻构造上,是一个白垩系营城组火山岩气藏。营城组火山岩由5个喷发期次组成,岩石类型主要为凝灰岩、熔结凝灰岩、流纹岩和火山角砾岩;岩相主要为溢流相上部、中部、下部亚相,爆发相的热碎屑流亚相、空落亚相及火山通道相;储集空间主要为基质孔隙、裂缝与各类孔隙空间构成。受多旋回、多期次火山岩喷发的影响,火山岩储层岩石类型复杂、岩性岩相变化大、储层孔、洞、缝分布不均、地震响应特征规律性差、储层描述难度大。采用井震结合,以测井资料为约束,通过多数据体地震波形属性分析和相控地震反演技术,较好地表征了火山岩储层有效储集空间。经过4口开发水平井验证,不仅控制了有效储集层,而且均取得高产气流。
Songnan Gas Field was developed from the Yaoyingtai fault-nose structure of Laoyingtai-Daerhan uplift in the middle Changling Fault Sag of Songliao Basin,which was a Cretaceous volcanic gas reservoir of Yingcheng Formation.It was composed of 5 effusive periods with main rock types of tuff,dissolved tuff,rhyolite and explosive breccia;main rock facies included upper,middle and lower subfacies of effusive facies,pyroclastic flow subfacies and airfall subfacies of explosive facies,volcanic conduit facies;main reservoir space included matrix pore,fracture and other kind pore structures.Affected by multicycles,multi-phase volcanic rock effusion,volcanic rock was difficult to be described with complex rock types,various changes of lithologic facies,heterogeneous distribution of pore,hole and fracture,poor regularity of seismic response characters.In combination with well logging and seism and logging information,it characterized effective reservoir space of volcanic rock in a good way through multi-data seismic waveform property analysis and facies-controlled seismic inversion technology.With verification of 4 development horizontal wells,not only effective reservoir is controlled,also high production flow is achieved.
Songnan Gas Field was developed from the Yaoyingtai fault-nose structure of Laoyingtai-Daerhan uplift in the middle Changling Fault Sag of Songliao Basin,which was a Cretaceous volcanic gas reservoir of Yingcheng Formation.It was composed of 5 effusive periods with main rock types of tuff,dissolved tuff,rhyolite and explosive breccia;main rock facies included upper,middle and lower subfacies of effusive facies,pyroclastic flow subfacies and airfall subfacies of explosive facies,volcanic conduit facies;main reservoir space included matrix pore,fracture and other kind pore structures.Affected by multicycles,multi-phase volcanic rock effusion,volcanic rock was difficult to be described with complex rock types,various changes of lithologic facies,heterogeneous distribution of pore,hole and fracture,poor regularity of seismic response characters.In combination with well logging and seism and logging information,it characterized effective reservoir space of volcanic rock in a good way through multi-data seismic waveform property analysis and facies-controlled seismic inversion technology.With verification of 4 development horizontal wells,not only effective reservoir is controlled,also high production flow is achieved.
引文
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