涠西南凹陷南斜坡晚始新世扇三角洲复杂储层预测关键技术及油气地质意义
发布时间：2018-07-31 11:07
【摘要】：涠西南凹陷南斜坡晚始新世流一段时期发育自南向北推进的扇三角洲沉积,而内部多期朵叶体又具有纵向叠置、横向连片的特点,从其沉积内幕的复杂性和岩性圈闭难识别、难预测的特点入手,从层序约束下的砂体雕刻、复杂储层预测以及油气地质意义方面对该区细致剖析,逐一寻找垂向相序变化规律、优质储层的展布规律、油气富集规律,从而提升该区的整体评价价值。研究得出,该区流一段下部可细分为两个四级层序,共识别出5期三角洲朵叶体,13套纵横叠置的单砂体,而沉积水动力条件应是导致其非均质性强、物性差异的根本原因。结合油气成藏认识,首次提出自北向南三排构造的不同成藏主控因素和研究方向,对该区隐蔽圈闭的预测和精细评价具有一定的指导意义,也进一步夯实了涠西南增储稳产的信念。
[Abstract]:Fan delta deposits from south to north were developed in the south slope of Wei Southwest Sag during the late Eocene current period, while the internal multi-stage flower bodies have the characteristics of vertical superposition and horizontal linking, so it is difficult to identify the complexity and lithologic traps of the sedimentary interior. Starting with the characteristics of difficult prediction, this paper analyzes the sand body carving, the prediction of complex reservoir and the geological significance of oil and gas in this area one by one in order to search for the law of vertical phase sequence change, the distribution law of high quality reservoir, and the law of oil and gas enrichment, from the aspects of sequence constrained sand body carving, complex reservoir prediction and hydrocarbon geological significance. So as to enhance the overall evaluation value of the area. The study shows that the lower part of the first member of the flow in this area can be subdivided into two four-order sequences, and a total of 13 sets of single sand bodies with vertical and horizontal overlay are identified in the fifth stage of the delta. The sedimentary hydrodynamic conditions should be the fundamental cause of the strong heterogeneity and the difference in physical properties. Combined with the understanding of oil and gas accumulation, it is the first time to put forward the main factors and research directions of different reservoir formation from north to south, which has certain guiding significance for the prediction and fine evaluation of subtle traps in this area. It also further rammed up the belief of increasing storage and stable production in Wei Southwest.
【作者单位】： 中海石油(中国)有限公司湛江分公司;
【基金】：国家重大课题专项(2016ZX05024-006)
【分类号】：P618.13
[Abstract]:Fan delta deposits from south to north were developed in the south slope of Wei Southwest Sag during the late Eocene current period, while the internal multi-stage flower bodies have the characteristics of vertical superposition and horizontal linking, so it is difficult to identify the complexity and lithologic traps of the sedimentary interior. Starting with the characteristics of difficult prediction, this paper analyzes the sand body carving, the prediction of complex reservoir and the geological significance of oil and gas in this area one by one in order to search for the law of vertical phase sequence change, the distribution law of high quality reservoir, and the law of oil and gas enrichment, from the aspects of sequence constrained sand body carving, complex reservoir prediction and hydrocarbon geological significance. So as to enhance the overall evaluation value of the area. The study shows that the lower part of the first member of the flow in this area can be subdivided into two four-order sequences, and a total of 13 sets of single sand bodies with vertical and horizontal overlay are identified in the fifth stage of the delta. The sedimentary hydrodynamic conditions should be the fundamental cause of the strong heterogeneity and the difference in physical properties. Combined with the understanding of oil and gas accumulation, it is the first time to put forward the main factors and research directions of different reservoir formation from north to south, which has certain guiding significance for the prediction and fine evaluation of subtle traps in this area. It also further rammed up the belief of increasing storage and stable production in Wei Southwest.
【作者单位】： 中海石油(中国)有限公司湛江分公司;
【基金】：国家重大课题专项(2016ZX05024-006)
【分类号】：P618.13
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