结构优度——估价储油层孔隙结构的首要参数

GOODNESS OF PORE GEOMETRY——THE MOST IMPORTANT PARAMETER FOR ESTIMATING PORE GEOMETRY IN RESERVOIRS

陈立官 王柏钧 李鸿智

Chen Liguan Wang Bojun Li Hongzhi

用压汞法研究油气储集层的孔隙结构已较为普遍。如何综合整理有关成果,提出一个适当的指标,以表征孔隙结构的优劣程度,便于在油气勘探与开发中应用,是人们关注而未解决的一个重要问题。

Mercury injection is one of the efficient methods for investigating pore geometry of reservoirs.A lot of capillary curves from mercury apparatus have been accumulated in an oil field in northwest China.The most important parameter for estimating pore geometry in resevoirs,which is called Gg,has been found out by multivariated analysis combined with geological studies.It can be used to estimate the mode of pore geo-metry of reservoir rocks.It is found that,the smaller the value of Gg,the better is the pore geometry and vice versa.Gg can also be used tohelp estimate the water advance of water driving pools or injection exp-loitation.Thus,it is a useful parameter in exploitation analysis.Onthe basis of our observation of the relationship between Gg,porosityand permeability,a polynomial has been suggested for estimating the Ggvalue and a simple formula is obtained by means of regression.

10.11743/ogg19800108