黄骅坳陷新生界火成岩岩相与储集性能分析

通过取芯段火成岩岩芯观察、测井以及地震相分析，将黄骅坳陷新生界火山岩划分为爆发相、溢流相、火山通道相和火山沉积相4种，并根据储集空间特征进一步划分为10种亚相，将侵入岩划分为3个相带。在此基础上建立黄骅坳陷火成岩岩相模式，并分析不同岩相火成岩的储集性能。研究认为：研究区溢流相上下区亚相和爆发相储集物性优越，构造裂缝和原生气孔发育，气孔、溶蚀孔缝、构造缝为主要储集空间；侵入相和次火山岩相火成岩由于热液作用造成围岩发生变质，原岩结构构造发生变化，使原来孔渗条件极差的泥岩变质为具有一定储集性能的储集岩；主要储集空间为收缩裂隙和构造裂隙。

Lithofacies and reservoir property of Cenozoic igneous rocks in the Huanghua Depression

According to volcanic core observation of coring well, logging and seismic phase analysis, this work divided the Cenozoic volcanic rocks in the Huanghua Depression into 4 types of eruptive facies, overflow facies, volcanic conduit facies and volcanic depositional facies, which were subdivided into 10 different subfacies based on the features of reservoir space. The intrusive rocks in this depression were divided into 3 facies zones. Then the model of igneous rocks in the Huanghua Depression was established and the reservoir property of different igneous rocks was also analyzed. It is shown that the upper subfacies and lower subfacies of overflow facies and eruptive facies have high-quality reservoir physical properties, with developed tectonic fractures and primary pores, which have gas pores, dissolved pores and tectonic fissures as dominating reservoir space. Intrusive rocks and subvolcanic facies volcanic rocks caused surrounding rocks to be metamorphic because of thermal processes, and the textures and structures of primitive rocks changed, which makes mudstones with poor reservoiring property be metamorphic as rocks with some reservoir property. And the main reservoir spaces are shrinkage crack and structure crack.