SZ36-A油田东二段储层特征及主控因素研究

Analysis on reservoir characteristics and its main controlling factors of Ed_2 formation in SZ36-A oilfield

绥中36-A油田是渤海海域亿吨级的大油田,古近系含油气层段主要集中在东二段。通过理论和实际相结合,物探和地质相结合,微观和宏观相结合,勘探和开发相结合,详细分析了该区东二段储层特征及其主控因素:东二段发育湖泊三角洲前缘亚相的有利储层相带;同时综合分析成岩作用,粘土矿物含量,温压场及流体充注的等几个影响物性的重要方面,认清了该段发育侧向展布范围广、纵向厚度大,高孔高渗优质储层的根本原因。

SZ36-A oilfield is a big oilfield with hundred-million tons in Bohai offshore field. The mainly oil-bearing is concentrate on Paleogene Ed2 formation. Through integrating theory with practice, geophysical with geological, reservoir characteristics with sedimentary facies and exploration with development, the rules of reservoir microscopic characteristics and its main controlling factors have been analyzed in this paper. The favorable reservoirs are mainly distributed in lake delta front. At the same time, diagenesis has been analyzed, which calculates the relative of clay minerals component temperature and pressure fields, liquid's filling and other important effects on reservoir characteristics. The sets of reservoir extension have bigger thickness, which belongs to high porosity and high permeability favorable reservoirs.