| 邓猛,金宝强,周军良,胡勇,耿红柳.精细古地貌恢复在海上油田中-深层储层预测中的应用——以渤海X油田沙二段为例[J].地质找矿论丛,2018,33(3):399-408 |
| 精细古地貌恢复在海上油田中-深层储层预测中的应用——以渤海X油田沙二段为例 |
| Application of fine paleo-geomorphology restoration to reservoir prediction at medium-deep depth in offshore oilfield: the case of Sha-2 member of X oilfield in Bohai sea |
| 投稿时间：2017-11-20 修订日期：2018-05-31 |
| DOI：10.6053/j.issn.1001-1412.2018.03.010 |
| 中文关键词: 储层预测 去压实 古水深 古地貌 沙二段 古近系 渤海 天津 |
| 英文关键词:reservoir prediction de-compaction paleo-water depth paleo-geomorphology Member Sha-2 Palaeogene Bohai sea Tianjin |
| 基金项目:国家重大科技专项"海上油田丛式井网整体加密及综合调整油藏工程技术示范"（编号：2011ZX05057-001）、中国海洋石油总公司重大科技专项"渤海典型低孔低渗油藏勘探开发关键技术研究与实践"（编号：CNOOC-KJ125ZDXM07LTDTJ02）联合资助。 |
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| 中文摘要: |
| 近年来渤海X油田生产与资源的矛盾日益凸显，且因钻井少、井距大和储层埋藏深，储层认识及"甜点"预测难度很大。文章综合利用钻、测井资料、地震资料等，以高频层序地层格架下地层发育特征为切入点，采用"地震分析定性、层序格架定时、地层厚度定量、三维可视成图"的思路，重点经过去压实恢复、古水深校正，精细恢复沙二段6个沉积时期古地貌。其结果表明，渤海X油田主要发育沟谷、凹陷、斜坡和凸起四种地貌类型。不同沉积期古地貌特征差异明显：沉积早期以隆起为主，沟谷-凹陷组合仅在西南部发育，沉积范围局限；沉积中后期隆起向西北收缩，沟谷-凹陷组合向东北延伸，沉积范围扩大；沉积晚期全区大范围以沟谷-凹陷组合为特征，地形坡度变化小，砂体连片分布。此外，结合生产动态及薄片资料等，从砂岩厚度、水动力条件、单井产能等方面，以E3S2-1-E3S2-2小层古地貌分布图为基础，综合选择砂岩厚度大于15 m、古水深小于7 m、比采指数大于0.6等参数作为边界约束，预测出有利储层分布区域3个。上述认识对该区后期开发、调整具有重要的参考价值。 |
| 英文摘要: |
| In recent years. The exploitation-resource contradictions in Bohai X oilfield were increasingly outstanding. Due to the limited wells、lager well spacing and deeply buried reservoir recognition of reservoir in "sweet spot" area prediction in study area were extremely difficult. This paper combines data of drilling, well logging and seismic survey et al, and fully considers the characteristics of stratigraphic development in high resolution sequence stratigraphic framework then adopts the seismic data to make qualitative analysis, sequence stratigraphic data timing, stratigraphic thickness data quantification analysis and 3d visualization mapping then the paleo-geomorphology of six sedimentary periods of Sha-2 is reconstructed by de-compaction and paleo-depth correction. The result shows that four paleo-geomorphology types mainly developed in study area including paleo-valleys, paleo-sag, paleo-slope and paleo-uplift. The sedimentary stages are varied with different morphological characteristics. The early stage is dominated by uplift with valley-sag combination only developed in southwest part and limited sedimentation area, the middle stage by contraction of the uplift to tonothwest with northeast extension of valley-sag and large sedimentation area, the late stage by dominance of the valley-sag combination with gentle slope and continuous sand bodies. In addition three areas favorable for reservoir distribution are predicted according to constraint boundary of sand thickness exceed 15m, paleo -water depth less than 7m and specific productivity index exceed 0.6. The constraint is defined comprehensively by the paleo-geomorphology distribution map of E3S2-1 and E3S2-2, dynamic production data and thin section data, sandstone thickness, hydrodynamic condition, single well productive capacity and well productivity et al. |
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