基于叠前深度偏移的基岩潜山风化淋滤带储层预测

doi:10.12108/yxyqc.20210120

岩性油气藏 ›› 2021, Vol. 33 ›› Issue (1): 220–228.doi: 10.12108/yxyqc.20210120

基于叠前深度偏移的基岩潜山风化淋滤带储层预测

孙夕平¹, 张昕¹, 李璇¹, 韩永科¹, 王春明¹, 魏军², 胡英¹, 徐光成¹, 张明¹, 戴晓峰¹

1. 中国石油勘探开发研究院, 北京 100083;
2. 中国石油玉门油田分公司勘探开发研究院, 甘肃酒泉 735000

收稿日期:2020-05-09 修回日期:2020-08-04 出版日期:2021-02-01 发布日期:2021-01-25
作者简介:孙夕平(1976-),男,博士,高级工程师,主要从事复杂储层预测技术研究与应用方面的工作。地址:(100083)北京市海淀区学院路20号。Email:xipingsun@petrochina.com.cn。
基金资助:
国家油气重大科技专项“岩性地层油气藏区带、圈闭有效性评价预测技术”（编号：2017ZX05001-003）、中国石油天然气股份有限公司科学研究与技术开发项目“地震储层预测质控软件系统集成研发”（编号：kt2020-10-05）和中国石油天然气股份有限公司重大推广专项“自主知识产权软件推广”（编号：2018D-0813）联合资助

Reservoir prediction for weathering and leaching zone of bedrock buried hill based on seismic pre-stack depth migration

SUN Xiping¹, ZHANG Xin¹, LI Xuan¹, HAN Yongke¹, WANG Chunming¹, WEI Jun², HU Ying¹, XU Guangcheng¹, ZHANG Ming¹, DAI Xiaofeng¹

1. PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China;
2. Research Institute of Exploration and Development, PetroChina Yumen Oilfield Company, Jiuquan 735000, Gansu, China

Received:2020-05-09 Revised:2020-08-04 Online:2021-02-01 Published:2021-01-25

摘要/Abstract

摘要： 基岩潜山风化壳是油气勘探重要领域，但基岩潜山一般埋藏较深，地表、地下构造复杂，导致地震成像困难，地震振幅难以保真，风化淋滤带储层预测难度大。为了准确刻画基岩潜山风化淋滤带储层，采用从近地表出发的整体速度建模技术和保真叠前深度偏移技术，提高了复杂构造区地震资料成像准确性和保幅效果；针对基岩潜山风化淋滤带的分层特征，将地震资料和地质资料相结合，建立了潜山储层内幕分层结构；应用了相干体和蚂蚁追踪等技术识别出裂缝分布规律，再结合地震振幅的分类特征，获得了基岩潜山内幕的有效储层厚度。在酒西盆地青西凹陷鸭儿峡潜山的实际应用效果表明：根据油藏开发情况圈定出的高产油藏区，与该方法预测出的风化淋滤带储层厚度对应良好。该方法可为基岩潜山内幕储层目标刻画提供支撑手段。

关键词: 保幅叠前深度偏移, 基岩潜山, 风化淋滤带, 深度域解释, 储层预测, 裂缝预测

Abstract: The weathering crust of bedrock buried hill is an important field of oil and gas exploration. However, because of the deep buried depth,the complex surface and underground structure,it is difficult to obtain seismic imaging and the seismic amplitude is hard to be preserved. Moreover,it is difficult to predict the reservoir in weathering and leaching zone. In order to accurately depict the reservoir in weathering and leaching zone of bedrock buried hill,the velocity modeling technology from near-surface and amplitude-preserved pre-stack depth migration technology were used to improve the seismic imaging accuracy and amplitude preservation effect of complex structural area. Based on the layered characteristics of weathering and leaching zone of bedrock buried hill,combined seismic data with geological data,the internal layered structure of buried hill reservoir was established. The fracture distribution law was identified by using coherence cube and ant tracking technology,then combined with the classification characteristics of seismic amplitude,the effective thickness prediction of inner bedrock buried hill was carried out. The actual application in Ya'erxia buried hill proved that the high-yield reservoir area delineated according to reservoir development made a good match with the reservoir thickness prediction of the weathering and leaching zone by this method. This method can provide effective support for the characterization of inner reservoir targets in bedrock buried hill.

Key words: amplitude-preserved pre-stack depth migration, bedrock buried hill, weathering and leaching zone, depth domain interpretation, reservoir prediction, fracture prediction

中图分类号:

P631.4

孙夕平, 张昕, 李璇, 韩永科, 王春明, 魏军, 胡英, 徐光成, 张明, 戴晓峰. 基于叠前深度偏移的基岩潜山风化淋滤带储层预测[J]. 岩性油气藏, 2021, 33(1): 220–228.

SUN Xiping, ZHANG Xin, LI Xuan, HAN Yongke, WANG Chunming, WEI Jun, HU Ying, XU Guangcheng, ZHANG Ming, DAI Xiaofeng. Reservoir prediction for weathering and leaching zone of bedrock buried hill based on seismic pre-stack depth migration[J]. Lithologic Reservoirs, 2021, 33(1): 220–228.

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基于叠前深度偏移的基岩潜山风化淋滤带储层预测

Reservoir prediction for weathering and leaching zone of bedrock buried hill based on seismic pre-stack depth migration

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