四川盆地威远龙马溪组页岩气甜点区地震定量预测

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摘要应用模糊优化方法,对四川盆地威远201区块下志留统龙马溪组页岩气储集层甜点进行了地震定量预测。首先以地震岩石物理分析为基础,确定储集层岩石物理特征,优选高含气页岩敏感弹性参数;通过叠前同时反演获得高精度弹性参数反演数据体,并根据岩石物理分析结果求取页岩气关键评价参数的平面分布;选取施工条件基本相同的水平井测试及测井数据,应用模糊优化的方法,构建模糊评价方程;经过模糊优化确定影响水平井产量的关键参数及各参数在甜点区定量预测中所占比例,建立甜点区定量预测评价体系。经上述过程共预测出3类页岩气储集层,2类甜点区,并将预测结果与测试产量挂钩,实现了甜点区定量预测,8口验证井的测试结果证实了预测结果的可靠性。图8表5参28

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	曾庆才
	陈胜
	贺佩
	杨青
	郭晓龙
	陈鹏
	代春萌
	李璇
	盖少华
	邓宇
	侯华星

关键词 ：四川盆地, 下志留统龙马溪组, 页岩气, 甜点区, 定量预测, 三维地震, 模糊优化

Abstract：Sweet spots in the shale reservoirs of Silurian Longmaxi Formation in Block Weiyuan 201 of Sichuan Basin were predicted quantitatively using seismic data and fuzzy optimization method. First, based on seismic and petrophysical analysis, the petrophysical features of reservoir rock were determined, and elastic parameters sensitive to high gas content shale were selected; second, high resolution data volumes of the elastic parameters were obtained from prestack simultaneous inversion, and the planar distribution of key parameters of shale gas evaluation were calculated based on the results of petrophysical analysis; third, the fuzzy evaluation equation was established by fuzzy optimization method with test and logging data of horizontal wells with similar operation conditions; fourth, key parameters affecting the productivity of horizontal wells were sorted out and the proportions of them in the sweet spot quantitative prediction were worked out by fuzzy optimization to set up a sweet spot evaluation system. Three classes of shale gas reservoirs and 2 kinds of sweet spots were been predicted with the above procedure, and the sweet spots have been predicted quantitatively by combining the above prediction results with the testing production. The testing results of 8 verification wells proved the reliability of the prediction results.

Key words： Sichuan Basin Lower Silurian Longmaxi Formation shale gas sweet spot quantitative prediction 3D seismic fuzzy optimization

收稿日期: 2017-08-01 出版日期: 2018-03-07

PACS:

TE122.2

基金资助:国家科技重大专项“富有机质页岩储集层精细描述与定量表征”（2017ZX05035-02）

作者简介: 曾庆才（1969-）,男,江西兴国人,博士,中国石油勘探开发研究院高级工程师,主要从事物探资料分析、处理和解释方法研究。地址：河北省廊坊市广阳区万庄石油分院C楼,中国石油勘探开发研究院油气地球物理研究所,邮政编码：065007。E-mail：zqc69@petrochina.com.cn

引用本文:

曾庆才, 陈胜, 贺佩, 杨青, 郭晓龙, 陈鹏, 代春萌, 李璇, 盖少华, 邓宇, 侯华星. 四川盆地威远龙马溪组页岩气甜点区地震定量预测[J]. 石油勘探与开发, 0, (): 7-7.
ZENG Qingcai, CHEN Sheng, HE Pei, YANG Qing, GUO Xiaolong, CHEN Peng, DAI Chunmeng, LI Xuan, GAI Shaohua, DENG Yu, HOU Huaxing. Quantitative seismic prediction of shale gas sweet spots in Lower Silurian Longmaxi Formation, Weiyuan area, Sichuan Basin, SW China[J]. Petroleum Exploration and Development, 0, (): 7-7.

链接本文:

http://www.cpedm.com/CN/ 或 http://www.cpedm.com/CN/Y0/V/I/7

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