鄂尔多斯盆地南部上古生界致密碎屑岩储层预测——以镇泾地区为例

陆红梅; 张仲培; 王琳霖; 卞昌蓉; 孙宜朴; 卢颖忠

doi:10.11781/sysydz202103443

鄂尔多斯盆地南部上古生界致密碎屑岩储层预测——以镇泾地区为例

doi: 10.11781/sysydz202103443

中国石化石油勘探开发研究院, 北京 102206

基金项目:

中国科学院战略性先导科技专项（A类）子课题“深层油气富集规律与战略选区” XDA14010406

中国石化科技部项目“鄂南古生界油气富集关键因素及目标评价” P19022-2

详细信息

作者简介:
陆红梅(1969-), 女, 硕士, 高级工程师, 从事油气勘探地震地质综合研究。E-mail: luhm.syky@sinopec.com

中图分类号: TE122.24
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- 被引次数: 0
出版历程
- 收稿日期: 2021-02-09
- 修回日期: 2021-04-16
- 刊出日期: 2021-05-28

Prediction of tight clastic reservoirs of Upper Paleozoic in southern Ordos Basin: a case study of Zhenjing district

SINOPEC Petroleum Exploration & Production Research Institute, Beijing 102206, China

摘要

摘要: 岩石物理特征难以有效区分储层与非储层，黄土塬叠后地震资料品质较差，储层预测成为鄂尔多斯盆地南部上古生界久攻不克的技术瓶颈，也成为制约该区勘探推进的原因之一。区带评价认为镇泾区块东北部是有利勘探区带，二叠系山西组二段、下石盒子组一段是主要勘探目的层。镇泾3D波形聚类地震相分析结果与镇泾地区物源、砂体展布特征一致，表明地震资料可以用来开展储层预测研究。结合沉积相展布特征的一系列地震正演模拟发现，山二段内与盒一段大套砂体有一定距离、具有一定厚度的砂体能够形成可识别的地震反射，这种地层岩性纵向上的空间组合与区域叠加型及厚层单一型砂体沉积模式吻合，正是周边已发现气藏的典型储盖组合类型。根据正演模拟结果优选的波峰数地震属性储层预测证实，山二段叠加型砂体及厚层单一型砂体呈SW-NE向宽幅条带状展布，进而开展的地震剖面特征同相轴的拾取解释与构造成图，直接圈定了山二段叠加型与厚层单一型砂体岩性圈闭的分布范围与埋深，为该区勘探部署提供了钻探目标。
- 砂体叠置方式 /
- 地震正演 /
- 地震相分析 /
- 薄层反射 /
- 储层预测 /
- 致密碎屑岩 /
- 上古生界 /
- 鄂尔多斯盆地南部
Abstract: It is difficult to distinguish reservoirs and non-reservoirs based on the rock's physical properties. The quality of post-stack seismic data in the loess plateau is poor, which makes it a technical bottleneck for the prediction of reservoir of the Upper Paleozoic, and the exploration in the southern Ordos Basin was then constrained. Block evaluations have indicated that the northeastern part of Zhenjing district has a good potential for exploration, with the second member of Permian Shanxi Formation and the first member of Xiashihezi Formation as the main target beds. The results of 3D seismic facies analysis in Zhenjing area are consistent with the regional sedimentary facies studies on provenance and the distribution of sand bodies, indicating that seismic data can be used for the prediction of reservoir. The distribution of sedimentary facies of a series of seismic forward modeling showed that the sand bodies distributed with a certain distance and thickness in the second member of Shanxi Formation and the first member of Xiashihezi Formation formed recognizable seismic reflections. This vertical spatial combination of stratigraphic lithology is consistent with the depositional model of regional superimposed and thick single-type sand bodies, which is the typical form of reservoir-caprock combination that has been discovered in the surrounding gas reservoirs. The reservoir prediction based on the optimal number of wave crests from the forward simulation results confirmed that the superimposed and the thick single-type sand bodies of the second member of Shanxi Member were distributed in SW-NE directions. Furthermore, the picking and interpretation of co-phase axis and the structural mapping of seismic profile were carried out, which directly delineated the distribution range and burial depth of lithologic traps in the sand bodies of the second member of Shanxi Formation, and provided drilling targets for exploration and deployment in this area.
- sand body stack mode /
- seismic forward modeling /
- facies analysis /
- thin layer reflection /
- reservoir prediction /
- tight clastic reservoir /
- Upper Paleozoic /
- southern part of Ordos Basin

HTML全文

图 1 研究区位置及鄂尔多斯盆地南部二叠系山西组二段砂体平面展布

据崔凯^[15]修改，2016。

Figure 1. Location of study area and distribution of sand bodies in second member of Permian Shanxi Formation, southern Ordos Basin

下载: 全尺寸图片幻灯片

图 2 鄂尔多斯盆地南部镇泾地区二叠系山西组—盒一段砂体展布与叠置方式变迁示意

Figure 2. Distribution and stack mode of sand bodies from Permian Shanxi Formation to first member of Xiashihezi Formation, Zhenjing area, southern Ordos Basin

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图 3 鄂尔多斯盆地南部镇泾地区DC1井山二段、盒一段岩石物理特征

Figure 3. Petrophysical characteristics of second member of Shanxi Formation and first member of Xiashihezi Formation, well DC 1, Zhenjing area, southern Ordos Basin

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图 4 鄂尔多斯盆地南部镇泾地区3D山二段—盒一段神经网络波形聚类平面图

Figure 4. Waveform clustering results from second member of Shanxi Formation to first member of Xiashihezi Formation in Zhenjing 3D area, southern Ordos Basin

下载: 全尺寸图片幻灯片

图 5 鄂尔多斯盆地南部镇泾地区3D北部地层界面反射系数与正演模型基础数据

Figure 5. Fundamental data of reflection coefficient and seismic forward modeling in the north of Zhenjing 3D area, southern Ordos Basin

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图 6 楔状模型与薄层模型地震响应

Figure 6. Seismic response of wedge and thin layer models

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图 7 鄂尔多斯盆地南部镇泾地区目的层段一个地震正演模型及其模拟结果

Figure 7. Seismic forward modeling of target layers in Zhenjing area, southern Ordos Basin

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图 8 鄂尔多斯盆地南部镇泾地区DC1井地层柱状图及正演模拟结果与实际地震井旁道对比

Figure 8. Stratigraphic histogram of well DC1 and its forward modeling results compared with actual seismic well bypass, Zhenjing area, southern Ordos Basin

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图 9 鄂尔多斯盆地南部镇泾地区3DT₉—T₉d之间地震属性波峰数平面图

Figure 9. Seismic wave peak numbers between T₉ and T₉d in Zhenjing area, southern Ordos Basin

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图 10 鄂尔多斯盆地南部镇泾地区3D主测线2800地震剖面T₉—T₉d之间同相轴拾取

Figure 10. Event interpretation between T₉ and T₉d on seismic section of inline 2800, Zhenjing area, southern Ordos basin

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图 11 鄂尔多斯盆地南部镇泾地区3D北部山二段岩性圈闭分布

平面图位置见图 10右中的蓝色虚线框。

Figure 11. Lithologic trap distribution in the second member of Shanxi Formation, northern Zhenjing area, southern Ordos Basin

下载: 全尺寸图片幻灯片

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