济阳坳陷上第三系储层特征及天然气藏形成条件分析

济阳坳陷上第三系是胜利油田的主要产油气层段之一，也是今后进一步进行天然气勘探开发工作的主力目的层位。本文从上第三系储层的类型及其展布规律、岩性、储集物性、微观孔隙结构等方面，详细分析了天然气储层的特征。并在此基础上，讨论了天然气藏的形成条件及天然气富集规律。研究表明，天然气对储层储集物性的要求比石油更具广泛性；天然气藏的形成除必须具备一定的储层条件外，更重要的是受控于生成运移条件、盖层条件及一定构造背景等。

CONDITIONS OF FORMATION FOR RESERVOIR CHARACTERISTICS AND NATURAL GAS POOL IN NEOGENE SYSTEM AT JIYANG DEPRESSION

The Neogene System in Jiyang depression is one of the main oil and gasproduction members at Shengli oilfield.This paper studies the reservoir bed types and theirdistributions,lithological characteristics and micropore structures.The result shows that thereservoir bed types are variable and heterogeneous.The reservoir beds of different microfacieshave their own characteristics,which shows that natural gas demands reservoir bed conditionsmore extensive than oil.The formation of natural gas mainly depends on the gas resource andmigration,cap bed conditions and certain tectonic background.The Neogene system in Jiyangdepression strived gas production resource,unimpeded migration passageways,varied traptypes,advantageous cap bed and preserve conditions.