张藜,刘艺萌,刘腾,姚城,魏国财
ZHANG Li,LIU Yimeng,LIU Teng,YAO Cheng,WEI Guocai

• 1:中海石油(中国)有限公司天津分公司

摘要(Abstract)：

小层自动追踪技术是Wheeler变换方法进行精细储层预测的核心技术。针对秦南凹陷古近系三角洲砂体纵向叠置、横向连片、多期砂体均有不同油水界面和油藏分布明显受岩性、地层尖灭控制的特点,采用基于地震沉积学地震反射结构精细处理的小层自动追踪技术,准确识别了三级层序界面、最大湖泛面和初始湖泛面,并在Wheeler域范围内进行沉积旋回的精细标定,实现体系域甚至更高级别的地层格架内部各期砂体展布分析。该方法在秦南凹陷缓坡区及陡坡带应用,缓坡区2套重要的泥岩盖层刻画效果较好,并经勘探证实与预测结果一致;同时在陡坡带精细解剖了近源扇体内部多期次砂体的纵向分布和平面展布,落实一系列有利岩性圈闭。小层自动追踪技术在相似低勘探程度区具有很好的应用前景。
Automatic sub-strata tracing technique is the core technology of Wheeler transforming method in the fine prediction of the reservoir. In the light of the characteristics of different oil-water interfaces and oil reservoirs obviously controlled by the lithology and stratigraphic pitch-out for the vertically superimposed,horizontally commingled and multi-stage Paleogene delta sandbodies in Qinnan Sag,with the help of the automatic sub-strata tracing technique for the fine process of the seismic reflection structure based on seismic sedimentology,the three-order sequence interface,the maximum and the first flooded lake surfaces were accurately identified,and moreover the fine calibration was achieved within Wheeler tract,thus the analyses of the sandbody spread were conducted within the system tract and even higher level of the stratigraphic framework at different stages. The method was applied on the gentle slope area and steep slope belt of Qinnan Sag,two sets of the mudstone caps were well described in the area of the gentle slope,and furthermore the predicted results were accordant with the verification of the exploration. Atthe same time,the vertical distribution and planar spread of the multi-stage sandbodies within the proximal fan body on the steep slope were analyzed in detail,and moreover a series of the favorable lithological traps were determined. The automatic sub-strata tracing technique possesses much better application prospecting in the similar lowprospecting-degree area.

关键词(KeyWords)： 小层自动追踪技术;Wheeler变换;精细沉积预测;秦南凹陷;渤海海域
automatic sub-strata tracing technique;Wheeler transform;fine sedimentary prediction;Qinnan Sag;Bohai Sea

Abstract:

Keywords:

基金项目(Foundation): “十三五”国家科技重大专项“渤海海域勘探新领域及关键技术研究”(2016ZX05024-003)

作者(Author): 张藜,刘艺萌,刘腾,姚城,魏国财
ZHANG Li,LIU Yimeng,LIU Teng,YAO Cheng,WEI Guocai

DOI: 10.19597/J.ISSN.1000-3754.201712054

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