济阳拗陷桩西地区中生界火成岩储层控制因素  

Controlling factors of Mesozoic igneous rock reservoirs in Zhuangxi area,Jiyang depression,Shandong,China

作　　者：孙耀庭[1,2] 孙超[2] 李辉[2] 辛也[2] 姜瑞波[2] 张悦[2] 

机构地区：[1]中国石油大学地球科学与技术学院,山东青岛266580 [2]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《成都理工大学学报（自然科学版）》2016年第3期257-265,共9页Journal of Chengdu University of Technology: Science & Technology Edition

基　　金：国家科技重大专项(2011ZX05006-003)

摘　　要：渤海湾盆地济阳拗陷桩西地区中生界西洼组和蒙阴组发育火成岩储层。通过对火成岩储集空间及储层控制因素的综合分析,结果表明桩西地区火成岩主要发育气孔、基质内溶蚀孔隙和构造裂缝3类储集空间,储层物性主要受岩性、岩相和成岩作用控制。杏仁孔状安山岩和火山角砾岩经构造运动和溶蚀作用改造形成大量连接气孔和溶孔的构造裂缝,具有良好的储集性能。次生矿物充填及压实作用显著降低安山岩储层物性,导致岩体边缘及顶部比中部及下部物性好;火成岩溢流相、爆发相的相变部位岩体厚度较大,易于形成裂缝。活动断层附近、各喷发旋回之间形成的不整合面之下的巨厚安山岩发育区控制了火成岩有利储层的发育。The Mesozoic igneous rocks reservoirs develop in Xiwa Formation and Mengyin Formation of the Zhuangxi area. This paper analyzes the igneous rock reservoir spaces and the controlling factors of the reservoirs. The results show that there mainly develop three types of reservoir spaces in the igneous rocks. They are the pores, the dissolution pores within matrix and the structure cracks. The reservoir physical properties are controlled by lithology, petrographical facies and diagenesis. Almond hole-shape andesite and volcanic breccia are transformed by tectonic movement and dissolution to form a large number of structural cracks connecting pores and dissolved pores, and have good reservoir properties. The secondary minerals filling leads to the deterioration of the physical properties of the almond hole-shape basalt and significantly reduces the reservoir properties of the andesite, leading the top and edge parts of the andesite rock mass to have better physical properties than the low and middle parts of it. In the phase change positions of the igneous rock overflow phase and the outbreak phase, the thickness of the rock body is large and easy to form rock fractures. The thick andesite development zone under the surface of unconformity formed near the active faults and between eruption cycles controls the development of the igneous rock favorable reservoirs.

关 键 词：火成岩 储集空间 储层 物性特征 中生界 桩西地区 

分 类 号：TE122.222[石油与天然气工程—油气勘探]