石油实验地质2018，Vol.40Issue(3)：323-329,7.DOI:10.11781/sysydz201803323
苏北盆地溱潼凹陷浅成侵入岩接触变质带储层特征及控制因素
Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks in the Qintong Sag,Northern Jiangsu Basin
吴峻 1陈孔全 1张锋 2沈均均 1刘金帅 1谭静1
作者信息
- 1. 长江大学 非常规油气湖北省协同创新中心,武汉 430100
- 2. 中国石化 华东油气分公司,南京 210019
- 折叠
摘要
Abstract
Reservoir characteristics and controlling factors in the contact metamorphic zone of hypabyssal intrusive rocks are of a great significance for the exploration and development of magmatic oil reservoirs. The contact metamorphic zone of hypabyssal intrusive rocks was well preserved in the Shuaiduo-Maoshan areas of the Qintong Sag,Northern Jiangsu Basin,and is an ideal area to understand this mechanism.Systematic core and drill cuttings observations, well logging interpretation and borehole-seism-modulus integration techniques were conducted to evaluate spatial distribution regularities and dissect the characteristics of reservoir development in a typical contact metamorphic zone.Some favorable reservoirs in the contact metamorphic zone of intrusive rocks in the Qingtong Sag were predicted. The studies showed that wall rocks were altered by the influence of intrusive rocks, forming the contact metamorphic zone of intrusive rocks. The contact metamorphic zone has the characteristics of high natural gamma,medium sonic time difference,medium natural potential and high resistivity on logging curves.The contact metamorphic zone generally distributed above and below the intrusive rocks,and has a positive correlation with the thickness of intrusive rocks.In addition,the thickness of altered mudstones in the contact metamorphic zone is the main factor affecting the distribution of high quality reservoirs, and the high-quality reservoirs in the contact metamorphic zone near to volcanic sills are favorable for hydrocarbon accumulation.关键词
裂缝/蚀变厚度/侵入岩/储层分布预测/溱潼凹陷/苏北盆地Key words
fissure/alteration thickness/intrusive rock/favorable zone prediction/Qintong Sag/Northern Jiangsu Basin分类
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吴峻,陈孔全,张锋,沈均均,刘金帅,谭静..苏北盆地溱潼凹陷浅成侵入岩接触变质带储层特征及控制因素[J].石油实验地质,2018,40(3):323-329,7.
