石油物探2018，Vol.57Issue(3)：443-451,485,10.DOI:10.3969/j.issn.1000-1441.2018.03.014
珠江口盆地深水区珠江组成岩作用对含气砂岩AVO特征的影响研究
The relationship between diagenesis and AVO anomaly of gas-bearing sandstone in the ZJ formation of the Pearl River Mouth Basin,China
摘要
Abstract
A deep-water fan with gas bearing sandstone in the ZJ formation presents different AVO response features in different deep-water areas of the Pearl River Mouth Basin.After a theoretical analysis of geophysical and geological factors,the complex diagenesis was considered the key factor affecting the AVO response of the gas-bearing sandstone.A composite analysis of well-logging data,core slice,and seismic data showed that different diagenesis processes,namely,compaction,dissolution,and cementation,predominate the AVO response in different areas of the gas-bearing sandstone in the ZJ formation.In accordance with the diagene sis of the ZJ formation,the study region was divided into the following three diagenetic zones:1) A strong compaction-moderate dissolution-weak cementation zone,where the AVO anomaly of the gas-bearing sandstone is Class Ⅱ,2) a moderate compactionstrong dissolution-weak cementation zone,with a Class m AVO anomaly,and 3) a weak compaction-weak dissolution-strong cementation zone,where the AVO anomaly is a relatively weaker Class Ⅲ.The AVO response was then analyzed for each of the three zones respectively,to predict the distribution of gas-bearing sandstone in ZJ formation.As the proposed method solves the inconformity of seismic response in a study area,it could also be applied to other similar regions.关键词
含气砂岩/AVO/泊松比/波阻抗/成岩作用/分区域Key words
gas-bearing sandstone/AVO/Poisson's ratio/impedance/diagenesis/zones division分类
天文与地球科学引用本文复制引用
姚淑凡,丁文龙,赵刚,丛森..珠江口盆地深水区珠江组成岩作用对含气砂岩AVO特征的影响研究[J].石油物探,2018,57(3):443-451,485,10.基金项目
国家自然科学基金(41372139,41072098)、国家科技重大专项(2016ZX05046-003-001,2016ZX05034-004-003)联合资助.The research is financially supported by the National Natural Science Foundation of China (Grant Nos.41372139,41072098) and the National Science and Technology Major Project of China (Grant Nos.2016ZX05046-003-001,2016ZX05034-004-003). （41372139,41072098）
