七棵树油田低孔低渗砂岩储层的测井评价

Logging evaluation of low-porosity and low-permeability sandstone reservoir in Qikeshu field

低孔低渗储层的测井评价一直是油田勘探开发的难题。由于沉积作用、压实作用和溶蚀作用等各种成岩作用,七棵树油田储层具有低孔低渗特点,而且储层内次生孔隙发育,非均质性强,增加了储层评价的复杂性。为此,本文根据岩芯实验、地质录井和试油等并综合各种测井资料,确定了储层岩性与物性、含油性与物性关系;并在孔喉模型的基础上,通过分析物性和电性之间的关系,建立了一个适用于次生孔隙发育的低孔低渗储层的新模型,并进行解释分析。

The well logging interpretation of low porosity and low permeability reservoirs has been a difficult problem in oilfield exploration. With various reaction of the sedimentary process, compression and denudation, the Qikeshu reservoirs show the features of low porosity and low permeability. The reservoir develops secondary porosity and the heterogeneous increases the complexity of reservoir evaluation. We analyze the core experiment, well log- ging and well texting report, confirm the characteristic of lithology and physical property, oil-bearing property and physical property. Based on the model of pore-throat, the relationship between pore structure parameters and elec- trical property is analyzed and a new model is presented to interpret the sandstone reservoir of low porosity and low permeability with well-developed secondary porosity.