常规测井资料识别裂缝性储层流体类型方法研究

A study on fluid type identification of fracture reservoir by using routine well logging data

裂缝性储层流体类型识别一直是测井界亟待解决的难题.一方面裂缝性储层具有岩性复杂、储集类型多样、物性变化大和非均质性强等特点,因而其测井解释和流体类型识别要复杂和困难得多.另一方面,复杂岩性油气藏越来越得到人们的重视.本次研究中,通过对流体类型影响因素的分析,认识到不同流体类型与电阻率比值的高低、粘土含量的多少以及孔隙度的大小密切相关.提出了综合考虑上述三项因素的流体类型识别参数FTI.该方法应用于辽河盆地大民屯凹陷变质岩和碳酸盐岩潜山地层流体类型识别,效果良好.

Fluid type identification of fracture reservoir is a worldwide difficult problem. On the one hand, it is is very complex and difficult to identify fluid type of fracture reservoir because of its complex lithology, various reservoir types and heterogeneity. On the other hand, more and more attention has been paid to complex lithology reservoir. In this research, on the basis of analysis effect factor of reservoir fluid, fluid types are correlated to ratio of deep and low laterolog resistivity, clay content and porosity. The parameter of fluid type identification (FTI) was put forward. The method were applied to fluid type identification of metamorphics and carbonate reservoirs of Liaohe Basin, and obvious geological effect was obtained.