川东北YB地区钙屑砂岩储层测井评价方法

Logging Evaluation Method of Calcareous Sandstone Reservoir in YB Area of Northeastern Sichuan

为了弄清川东北YB地区钙屑砂岩储层复杂岩性、储层参数及含气性评价特征,通过将薄片鉴定、扫描电镜和常规岩心分析等实验资料与测井信息相结合的方式,开展储层特征分析和岩性识别研究,从而进行储层参数定量评价研究。首先,从区域构造、岩性、物性分析、储层类型等角度全面分析川东北致密气藏基本特征,再利用常规测井、成像测井以及地质录井等资料来有效识别岩性,最后采用改进的孔隙度模型和分储层类型的渗透率模型来对储层参数进行评价,提高了钙屑砂岩储层测井解释评价精度。通过川东北YB地区多口井的相关数据验证,本项研究所使用的测井评价方法计算得到的储层参数更符合实际情况,更具应用效果。

In order to clarify the complex lithology,reservoir parameters and gas-bearing evaluation characteristics of calcareous sandstone reservoirs in the YB area of northeastern Sichuan,the reservoir characteristics analysis and lithologic identification research were carried out by combining experimental data such as thin section identification,scanning electron microscope and conventional core analysis with logging information,so as to carry out quantitative evaluation of reservoir parameters.Firstly,the basic characteristics of tight gas reservoirs in northeast Sichuan are comprehensively analyzed from the aspects of regional structure,lithology,physical property analysis and reservoir type,and then lithology is effectively identified by using conventional logging,imaging logging and geological logging data.Finally,the improved porosity model and permeability model of different reservoir types are used to evaluate the reservoir parameters,which improves the logging interpretation evaluation accuracy of calcareous sandstone reservoir.Through the related data verification of several wells in Yb area of Northeast Sichuan,the reservoir parameters calculated by the logging evaluation method studied in this paper are more in line with the actual situation and have more application effect.