西南石油大学学报(自然科学版) ›› 2024, Vol. 46 ›› Issue (3): 27-36.DOI: 10.11885/j.issn.1674-5086.2022.09.10.03

• 地质勘探 • 上一篇    下一篇

川东南页岩气储层的岩石物理特征分析

刘文革1,2, 尹成1, 陈康3, 田发发4, 彭达3   

  1. 1. 西南石油大学地球科学与技术学院, 四川 成都 610500;
    2. 中国石油物探重点实验室页岩气地球物理研究室, 四川 成都 610500;
    3. 中国石油西南油气田公司勘探开发研究院, 四川 成都 610051;
    4. 中国石油长庆油田分公司第五采油厂, 陕西 西安 710200
  • 收稿日期:2022-09-10 发布日期:2024-06-26
  • 通讯作者: 尹成,E-mail:yinnc2703@vip.163.com
  • 作者简介:刘文革,1972年生,男,汉族,新疆石河子人,副研究员,博士,主要从事地震资料处理、成像和反演等方面的研究工作。E-mail:swpu_liuwg@swpu.edu.cn;尹成,1965年生,男,汉族,重庆北碚人,教授,博士研究生导师,主要从事地震属性优化分析、高阶统计量、观测系统优化设计及微地震等方面的研究工作。E-mail:yinnc2703@vip.163.com;陈康,1988年生,男,汉族,重庆忠县人,工程师,硕士,主要从事复杂地震波场传播机理、地震弱信号智能识别、叠前地震储层预测等方面的研究工作。E-mail:chenkang01@petrochina.com.cn;田发发,1991年生,男,汉族,甘肃静宁人,工程师,硕士,主要从事油气田开发方面的研究工作。E-mail:1139913435@qq.com;彭达,1987年生,男,汉族,湖北潜江人,高级工程师,博士,主要从事地震多属性分析、地震岩石物理分析等方面的研究工作。E-mail:pengda2016@petrochina.com.cn
  • 基金资助:
    中国石油-西南石油大学创新联合体科技合作项目(2020CX010202;2020CX010203)

Rock Physics Characteristics of Shale Gas Reservoir in Southeast Sichuan

LIU Wenge1,2, YIN Cheng1, CHEN Kang3, TIAN Fafa4, PENG Da3   

  1. 1. School of Geoscience and Technology, Southwestern Petroleum University, Chengdu, Sichuan 610500, China;
    2. Shale Gas Geophysics Laboratory, CNPC Key Laboratory of Geophysical Prospecting, Chengdu, Sichuan 610500, China;
    3. Research Institute of Exploration and Development, Southwest Oil & Gas Field Company, PetroChina, Chengdu, Sichuan 610051, China;
    4. No. 5 Oil Production Plant, Changqing Oilfield Company, CNPC, Xi'an, Shaanxi 710200, China
  • Received:2022-09-10 Published:2024-06-26

摘要: 四川盆地志留系龙马溪组页岩因富含有机质、埋藏深度适中的特点,已成为国内页岩气勘探的主要层位之一。页岩气储层非均质性强,物性参数所表现出的各向异性及脆性特征会受到多种因素的影响,不利于勘探中的测井解释和地震“甜点”的预测。基于以上原因,在四川长宁双河、重庆华蓥山三百梯等野外地质露头剖面采集页岩样品,利用 X 射线衍射分析页岩的矿物成分及含量,在实验条件下研究围压和温度的变化对地震速度的影响,确定地震速度与矿物成分的关系,以及页岩各向异性参数的变化规律。研究成果在一定程度上揭示了川东南地区含气储层黏土含量对页岩各向异性和脆性的控制作用,并总结出各向异性参数变化的经验关系,从而为岩石物理建模、各向异性参数反演以及脆性评价等提供地质依据。

关键词: 页岩气储层, 龙马溪组, 岩石物理, 地震波速, 各向异性

Abstract: The shale of Longmaxi Formation in Sichuan Basin has become one of main layers of gas exploration in China, because it is rich in organic matter and has a moderate burial depth. Shale reservoirs are characterized by strong non-homogeneity, and the anisotropy of physical parameters and brittleness are affected by various factors, which is not conducive to the logging interpretation and the prediction of seismic “sweet spot”. Based on the above reasons, shale samples are collected in the field geological outcrop section in Shuanghe, Changning, Sichuan, and Sanbaiti of Huaying Mountain, Chongqing. Rock physics test and parameter analysis are conducted in the laboratory. Related research contents include: using X-ray diffraction to analyze the mineral composition and content of rock samples, studying the influence of ambient pressure and temperature change on seismic velocity under test conditions, determining the relationship between seismic velocity and mineral composition, and the change of shale anisotropy parameters. To some extent, the results of research reveal the control effect of clay content in gas reservoir on shale anisotropy and britleness in southeast Sichuan, and summarize the empirical formulas between anisotropic parameters, so as to provide geological basis for rock physical modeling, anisotropic parameter inversion and brittleness evaluation.

Key words: shale gas reservoir, Longmaxi Formation, rock physics, seismic velocity, anisotropy

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