浅水三角洲前缘薄砂岩储层地震预测方法——以川西坳陷侏罗系蓬莱镇组二段为例

doi:10.12108/yxyqc.20260107

岩性油气藏 ›› 2026, Vol. 38 ›› Issue (1): 78–88.doi: 10.12108/yxyqc.20260107

浅水三角洲前缘薄砂岩储层地震预测方法——以川西坳陷侏罗系蓬莱镇组二段为例

田文忠¹(), 乔林¹, 袁剑¹, 李兴文¹, 向雷¹, 王长城²(), 芦刚², 卢喜和²

¹ 中国石化西南油气分公司采气一厂，四川德阳 618000
² 成都理工大学能源学院，成都 610059

收稿日期:2025-07-10 修回日期:2025-08-29 出版日期:2026-01-01 发布日期:2026-01-23
第一作者:田文忠（1979—），男，硕士，高级工程师，主要从事石油地质方面的研究工作。地址：（618000）四川省德阳市泰山北路三段399号。Email：tianwenzhong1979@163.com。
通信作者: 王长城
基金资助:
四川省自然科学基金重点项目“四川盆地致密砂岩气储层地震响应机理及地震沉积学表征方法研究”(2024NSFSC0008)

Seismic prediction method for thin sandstone reservoirs in shallow water delta front： A case study of the second member of Jurassic Penglaizhen Formation in Western Sichuan Depression

TIAN Wenzhong¹(), QIAO Lin¹, YUAN Jian¹, LI Xingwen¹, XIANG Lei¹, WANG Changcheng²(), LU Gang², LU Xihe²

¹ No. 1 Gas Production Plant， Southwest Oil & Gas Company， Sinopec， Deyang 618000， Sichuan， China
² College of Energy， Chengdu University of Technology， Chengdu 610059， China

Received:2025-07-10 Revised:2025-08-29 Online:2026-01-01 Published:2026-01-23
Contact: WANG Changcheng E-mail:tianwenzhong1979@163.com;wcc-126@163.com

摘要/Abstract

摘要：

结合地震、测井解释资料，建立了“多尺度地震沉积学分析-测井约束波阻抗反演-砂体厚度验证”三位一体的薄砂岩储层表征技术体系；并通过地震属性分析、分频RGB融合、波形聚类分析，刻画了川西坳陷侏罗系蓬莱镇组二段沉积微相及河道砂体的平面展布特征。研究结果表明：①川西坳陷侏罗系蓬莱镇组二段储层主要为水下分流河道砂体，测井响应特征为“低伽马箱形”，地震响应特征为“一个强波峰及与之对应的强波谷反射”，等时地层格架的建立和井-震一致的等时对比可提高地层解释精度。②研究区蓬莱镇组二段沉积微相主要为水下分流河道及分流河道间湾，JP33-1小层为水下分流河道沉积，发育北东—南西向、东—西向 2 条河道，其中，北东—南西向河道发育较宽且厚度较大，为下一步勘探开发的重点区域。③研究区蓬莱镇组二段水下分流河道砂体具有“中—低阻抗”的地球物理响应特征，基于“多尺度地震沉积学分析-测井约束波阻抗反演-砂体厚度验证”一体的薄砂岩储层表征技术体系预测砂体厚度准确性较高，反演预测厚度与测井解释厚度相关性达 0.886 5，主河道砂体厚度大，为10~20 m，分流河道砂体厚度小，为 5~10 m。

关键词: 地震沉积学, 浅水三角洲, 薄砂岩储层, 等时地层格架, RGB融合, 波阻抗反演, 地震预测, 蓬莱镇组, 侏罗系, 川西坳陷

Abstract:

By integrating seismic and logging interpretation data， a three-in-one characterization technology system for thin sandstone reservoir of “multi-scale seismic sedimentology analysis-logging constrained wave impe-dance inversion-sand body thickness verification” was established. And through seismic attribute analysis， frequency division RGB fusion， and waveform clustering analysis， the sedimentary microfacies and distribution of channel sand bodies of the second member of Jurassic Penglaizhen Formation in Western Sichuan Depression were cha-racterized. The results show that：（1） The reservoir of the second member of Jurassic Penglaizhen Formation in Western Sichuan Depression is mainly composed of underwater distributary channel sand bodies， with logging response feature of “low gamma box curve”， and seismic response feature of “a strong peak and corresponding strong valley reflection”. The establishment of an isochronous stratigraphic framework and isochronous comparisons of well-seismic consistency can improve the accuracy of stratigraphic interpretation. （2） The sedimentary microfacies of the second member of Penglaizhen Formation in the study area are mainly underwater distributary channels and distributary channel bays. JP33-1 sublayer is compopsed of underwater distributary channel deposits， with two channels developed： a northeast-southwest trending one and an east-west trending one. And the northeast-southwest trending channel is wider in development and greater in thickness， making it a key area for further exploration and development. （3） The underwater distributary channel sand bodies of the second member of Penglaizhen Formation in the study area exhibit the geophysical response characteristic of “medium-low impe-dance”.The integrated characterization technology system for thin sandstone reservoir of “multi-scale seismic sedimentology analysis-logging constrained wave impedance inversion-sand body thickness verification”can improve the accuracy of predicting sand body thickness， with correlation coefficient of 0.886 5 between inversion prediction thickness and logging interpretation thickness. The main channel sand body thickness is large， ranging from 10 to 20 m， and the distributary channel sand body thickness is small， ranging from 5 to 10 m.

Key words: seismic sedimentology, shallow water delta, thin sandstone reservoir, isochronous stratigraphic frame-work, RGB fusion, wave impedance inversion, seismic prediction, Penglaizhen Formation, Jurassic, Western Sichuan Depression

中图分类号:

TE121.3

田文忠, 乔林, 袁剑, 李兴文, 向雷, 王长城, 芦刚, 卢喜和. 浅水三角洲前缘薄砂岩储层地震预测方法——以川西坳陷侏罗系蓬莱镇组二段为例[J]. 岩性油气藏, 2026, 38(1): 78–88.

TIAN Wenzhong, QIAO Lin, YUAN Jian, LI Xingwen, XIANG Lei, WANG Changcheng, LU Gang, LU Xihe. Seismic prediction method for thin sandstone reservoirs in shallow water delta front： A case study of the second member of Jurassic Penglaizhen Formation in Western Sichuan Depression[J]. Lithologic Reservoirs, 2026, 38(1): 78–88.

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浅水三角洲前缘薄砂岩储层地震预测方法——以川西坳陷侏罗系蓬莱镇组二段为例

Seismic prediction method for thin sandstone reservoirs in shallow water delta front： A case study of the second member of Jurassic Penglaizhen Formation in Western Sichuan Depression

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