鄂尔多斯盆地Z区长8_1储层流体快速识别技术研究

Research on the Fast Identification Technique about Fluid Property of Chang 8_1 Reservoirs at Z Block in Ordos Basin

为解决鄂尔多斯盆地Z区长81低渗透率储层流体识别符合率低的难题,针对研究区地质特点,开展了储层特征、储层"四性"关系、储层电性特征微观成因机理等研究,剖析了工区流体识别难题的实质,基于试油、试采等动态资料和常规测井曲线综合分析,借助于常规测井曲线重构思想,建立该区长81储层流体快速判识技术;基于Matlab7.0平台开发了相应的流体快速识别软件。该区目的层为典型的超低渗透率储层,孔喉结构复杂、岩石微观结构致密是导致储层电性特征复杂、不能有效反映流体性质的关键。研究建立的流体识别技术对于类似储层流体识别具有一定的借鉴意义。

For the purpose of resolving the problem such as poor identifications of Chang 81 reservoirs fluid property in Ordos basin and improving the fluid property identification effect. We studied reservoir features and four-property relations and microscopic genetic mechanism of reservoir electric property according to the surveyed region geological characteristics and rich old log data researches, Moreover, the difficult points in fluid recognition are dissected. And then, the fast identifying technique about the fluid property with the thinking of reconstituting logging curves are worked out to identify the fluid property in Chang 81 reservoir on the basis of the multidisciplinary analysis of test data, producing test data and conventional logging data. Then, the software of fluid identification is developed on the platform of Matlab7.0. The above research indicates that the reservoir is the typical low permeability, complex pore throat composition and tight rock generate complex logging responses, and the fluid property couldn~ t effectively be revealed by the logging data. The logging curve reconstituting technique about multiple elements linear regression is much better in the fluid property recognition on the basis of dynamic document and conventional logging data. The software could be applied in identifying the fluid property simply and perfectly. The technique could provide the reference for the analogous reservoir.