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在确定储集层的必要参数中,孔隙度是最重要的,同时也是最难计算的。一般来说,碎屑岩的孔隙体积是由矿物颗粒之间的孔隙组成。在碳酸盐储集层中,可区别出多种类型的孔隙,但就储集层评价来说,一般认为孔隙度是受两种明显不同的原因支配:(1)基质孔隙度,一般有较小的孔隙空间,因此渗透率较低;(2)裂缝、裂隙及节理孔隙度,具有大的孔隙体积,其渗透率较高。岩石孔隙度的定量计算常常是困难的,但是很重要。主要的问题发生在分散页岩的情况或者储集层岩石孔隙度具有几种类型的情况。孔隙度的测定可以采用多种方法,特别有意义
Porosity is the most important and, at the same time, the most difficult parameter to determine the necessary parameters for a reservoir. In general, the pore volume of clastic rocks is composed of pores between mineral particles. In carbonate reservoirs, many types of pores can be distinguished, but in reservoir evaluation, porosity is generally considered to be dominated by two distinctly different causes: (1) matrix porosity, typically The smaller the pore space, and therefore lower permeability; (2) cracks, fissures and joint porosity, with a large pore volume, its permeability is higher. Quantitative calculation of rock porosity is often difficult, but important. The main problem occurs in shale distribution or reservoir rock porosity with several types of situations. There are a number of ways in which porosity can be measured, which is of particular interest