地震地质综合解释技术在东海西湖凹陷A气田的应用
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摘要
西湖凹陷西部斜坡带A气田投入开发以来,由于砂体横向变化快且规律不清,导致可动用储量大幅减少。本文在三维地震资料精细解释的基础上,开展了构造演化、地震沉积学以及储层地震学的研究,认为平北区平湖组地层先沉积后褶皱,古隆起两侧局部褶皱带有利于早期物源砂体的沉积,是研究区有利的成藏构造区带;利用地层切片技术的地震沉积学研究方法在精细研究的基础上针对A气田周边某目标进行了正反演交叉验证分析。综合研究表明地震地质综合解释技术的研究方法可有效运用于平北区的精细砂体刻画与储层预测研究。
Since the development of the A gas field of the Xihu depression began, the reserves of the gas bearing sands have changed rapidly. This study was based on the fine interpretation of 3 D seismic data, tectonic evolution characteristics, seismic sedimentology, and reservoir seismology research study indicating that the Pinghu formation of Pingbei folded after depositing. The local fold belt on both sides of the paleo uplift is not only advantageous to the depositing of provenance in early stages, but also propitious to the accumulation and preservation of gas in later stages. It is the most favorable tectonic zone of the study area. The seismic sedimentology study using the stratal slicing technique can be effective in researching the description of the fine sedimentary phase. Based on a detailed study aimed at a certain target in the A gas field periphery, forward and inversion cross validation analysis has been carried out. The positive effects of seismic and geological comprehensive interpretation techniques show that this method can be applied to fine sand body characterization and reservoir prediction in the Pingbei area.
Since the development of the A gas field of the Xihu depression began, the reserves of the gas bearing sands have changed rapidly. This study was based on the fine interpretation of 3 D seismic data, tectonic evolution characteristics, seismic sedimentology, and reservoir seismology research study indicating that the Pinghu formation of Pingbei folded after depositing. The local fold belt on both sides of the paleo uplift is not only advantageous to the depositing of provenance in early stages, but also propitious to the accumulation and preservation of gas in later stages. It is the most favorable tectonic zone of the study area. The seismic sedimentology study using the stratal slicing technique can be effective in researching the description of the fine sedimentary phase. Based on a detailed study aimed at a certain target in the A gas field periphery, forward and inversion cross validation analysis has been carried out. The positive effects of seismic and geological comprehensive interpretation techniques show that this method can be applied to fine sand body characterization and reservoir prediction in the Pingbei area.
引文
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[4]周祥林,高伟中,张建培,等.东海西湖凹陷平北断裂特征及其对油气成藏的控制[J].上海国土资源,2014,35(2):54-57.Zhou X L,Gao W Z,Zhang J P,et al.Fractures in the Pingbei area and their control on hydrocarbon accumulation in the Xihu sag of the East China Sea[J].Shanghai Land&Resources,2014,35(2):54-57.
[5]连小翠,张建培.西湖凹陷反转构造样式与迁移规律[J].上海国土资源,2016,37(4):83-88.Lian X C,Zhang J P.Inversion structural styles and migration rules in the Xihu Sag[J].Shanghai Land&Resources,2016,37(4):83-88.
[6]连小翠.东海陆架盆地沉降中心迁移演化机制[J].上海国土资源,2018,39(1):93-98.Lian X C.Migration and evolution of subsidence centers in the East China Sea Shelf Basin[J].Shanghai Land&Resources,2018,39(1):93-98.
[7]江志强.苏北盆地层序地层划分与砂岩储层预测研究[J].上海国土资源,2016,37(3):71-74.Jiang Z Q.Research on sequence stratigraphy and reservoir prediction in the Dainan Formation of eastern Gaoyou Sag in the Subei Basin[J].Shanghai Land&Resources,2016,37(3):71-74.
[8]蔡华,张建培,余逸凡.东海西湖凹陷古近系砂岩骨架颗粒构成及控制因素[J].上海国土资源,2014,35(3):90-94.Cai H,Zhang J P,Yu Y F.Components and controlling factors of the Paleogene sandstone grain framework in the Xihu sag of the East China Sea[J].Shanghai Land&Resources,2014,35(3):90-94.
[9]陈忠云,鲁法伟,张建培,等.东海陆架西湖凹陷新生代沉积地层时代厘定[J].上海国土资源,2013,34(1):42-45,59.Chen Z Y,Lu F W,Zhang J P,et al.Age of Cenozoic sedimentary formations of the Xihu sag,east China sea continental shelf[J].Shanghai Land&Resources,2013,34(1):42-45,59.
[10]赵洪,蒋一鸣,常吟善,等.西湖凹陷平湖组基于沉积相标志的沉积特征研究[J].上海国土资源,2018,39(1):88-92.Zhao H,Jiang Y M,Chang Y S,et al.Study on sedimentary characteristics of the Pinghu Formation based on sedimentary facies markers in Xihu Sag,East China Sea Basin[J].Shanghai Land&Resources,2018,39(1):88-92.