基于叠前地震全方位各向异性预测裂缝发育——以普光气田须家河组为例

熊金红; 陈岑; 曹占元; 谭先锋; 况昊

基于叠前地震全方位各向异性预测裂缝发育——以普光气田须家河组为例

熊金红^{1, 2,},
陈岑³,
曹占元⁴,
谭先锋³,
况昊³

1.
中国地质科学院地质力学研究所, 北京 100081
2.
北京大学地球与空间科学学院, 北京 100871
3.
重庆科技学院, 重庆 401331
4.
中国科学院油气资源研究重点实验室/甘肃省油气资源研究重点实验室, 甘肃兰州 730000

基金项目:

国家自然科学基金项目 41072106

中国科学院西部行动计划项目 KZCX2-XB3-12

详细信息

作者简介:
熊金红(1986-), 男, 在读博士研究生, 研究方向为盆地分析。E-mail:278031772@qq.com

中图分类号: P631.4
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- 被引次数: 0
出版历程
- 收稿日期: 2017-02-14
- 刊出日期: 2017-04-01

FRACTURE DEVELOPMENT PREDICTION BASED ON AZIMUTHAL ANISOTROPY ANALYSIS OF PRE-STACK SEISMIC-TAKE XUJIAHE FORMATION OF PUGUANG GAS FIELD FOR EXAMPLE

1.
Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, China
2.
School of Earth and Space Sciences, Peking University, Beijing 100871, China
3.
Chongqing University of Science & Technology, Chongqing 401331, China
4.
Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences/Key Laboratory of Petroleum Resources Research, Lanzhou 730000, Gansu, China

摘要

摘要: 本文首先建立正演模型，根据普光北部陆相须家河组地层特有岩性特征，针对不同角度裂缝进行模拟，得到沿裂缝方向振幅随着偏移距的增大而减小的规律；然后对叠前地震资料进行面元规则化、速度分析和叠前时间偏移叠加等处理，使之符合裂缝预测的要求；最后通过振幅随方位角的变化、频率属性随方位角的变化分析，反演得到须家河组储层裂缝走向和密度的数据体。以裂缝预测结果为指导，部署普陆1-2H井，并取得了良好的预期效果。
- 普光气田 /
- 须家河组 /
- 叠前地震 /
- 裂缝预测
Abstract: In the beginning of this paper, the forward model is established and stimulation is carried out on the fractures from different angles according to the unique lithology characteristics of Xujiahe formation in North Puguang. In view of the different point of azimuthal to simulate the fracture, the rule is summed up that along the direction of the fraction the amplitude of the fraction reduces as the offset increases.Then, the pre-stack seismic data is processed.The velocity analysis and the pre-stack time migration stack are processed to meet the requirement of fracture prediction.Finally, based on the analysis of the variations the amplitude with azimuth and the analysis of the variations the frequency with azimuth, through invesion, the data cubes of strike direction and the density of reservoir fractures are obtained. Guided by the fracture prediction, Pulu1-2H Well was deployed, and a good anticipated effect was achieved.
- Puguang gas field /
- Xujiahe formation /
- pre-stack seismic /
- fracture prediction

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图 1 普陆1井镜下微构造

a—粒缘缝，灰色中粒长石岩屑砂岩，3120.5 m，须六段，岩石薄片；b—粒内缝，灰色细砂岩，3100.16 m，须六段，铸体薄片；c—粒内缝，浅灰色中砂岩，3280.95 m，须四段，铸体薄片；d—粒间裂缝，灰色细砂岩，3183.01 m，须五段，铸体薄片；e—粒间裂缝，粉砂岩，3194.18 m，须五段，铸体薄片

Figure 1. The micro-structure of well Pulu1 under the microscope

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图 2 裂缝特征

a-普陆1井须家河组裂缝产状发育图；b-普陆1井须家河组裂缝充填情况

Figure 2. Fracture characteristics

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图 3 普陆1井裂缝充填物

Figure 3. Fracture filling of well Pulu1

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图 4 须家河组裂缝模型正演模型

Figure 4. Forward fractured model of XuJiahe formation

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图 5 迭代计算建立速度体剖面

Figure 5. Using iterative computations to establish velocity volume section

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图 6 须四段1砂组裂缝平面发育及走向图

Figure 6. The fracture plane development and strike of 1 group of the forth XuJiahe formation.

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图 7 普陆1-2H井裂缝性储层发育剖面图

Figure 7. Fractured Reservoir development of well Pulu 1-2H

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