高分辨率层序地层学在油田深度开发中的应用

根据钻井岩心、测井和成像测井等资料,综合研究了火烧山油田二叠系平地泉组H₂层不同级次基准面旋回界面和湖泛面的成因类型及高分辨率层序地层学特征,从H₂层(扇)三角洲沉积体系中划分出2个中期、8个短期旋回层序。讨论了短期旋回层序的沉积序列、结构类型、叠加样式和分布模式与储层非均质性、水淹特征和剩余油分布规律的关系,建立了以中期旋回层序和洪泛面为年代地层框架。以短期旋回层序为等时地层对比单元的地层格架,以短期旋回为等时编图单元,编制了H₂层沉积微相图。应用相控储层建模技术,以短期旋回层序为建模单元,建立了火烧山油田H₂层精细地质模型。研究结果表明,高分辨率层序地层学在高含水油田深度开发阶段有着广阔的应用前景。

Application of high-resolution sequence stratigraphy in deep development of oilfield

The characteristics of high resolution sequence stratigraphy and the different grade sequence interface and laucstrine flooding surface in H_2 Member of Permian Pingdiquan Formation of Huoshaoshan Oilfield with high water cut were studied by comprehensive analysis of cores, well logs, FMI logs data. According to the identification sign of the sequence interface and flooding sedimentation, the fan delta deposition system of H₂ member was divided into eight short term sequence cycles (SSC) and two middle term sequence cycles (MSC). The vertical sequence, facies association, structure type and stacking pattern were discussed. The correlations of the characteristics of short sequence cycle with reservoir heterogeneity, water flood feature and distribution of remaining oil were studied. According to the high resolution isochronous stratigraphic correlation of the turnround boundaries of different order base level sequence including short term and middle term cycle sequences, the sequence and time stratigraphic framework were built by taking the scale of supershort term base level cycle as an isochronous unit. The facies control stochastic modeling technique was used to build the fine geo model of H₂ Member in the scale of sequence and time stratigraphic framework. The high resolution sequence stratigraphy has a prospective application in the stage of deep development of high water cut oilfield.