大牛地气田储层裂缝测井评价及其对产能的影响

Logging Evaluation of the Fractured Reservoir of Daniudi Gas Field and Its Effect on the Production

为了评价大牛地气田低孔低渗低压致密储层裂缝发育情况,认识裂缝对天然气产能的控制作用,本文利用地层倾角、全波列、偶极声波、声电成像等测井资料来识别储层上的裂缝发育情况,总结裂缝发育储层的测井响应特征,最后,通过统计裂缝发育情况对产能的影响发现:有裂缝发育较好的储层往往天然气产量较高。初步确定裂缝是储层高产的主要原因,为指导大牛地气田勘探方向和储层评价方法提供了重要帮助。

In order to evaluate the development of fracture of tight reservoir in Daniudi gas field with low porosity and low permeability and understand the control effect of cracks on the productivity of gas,the formation dip angle,full waveform sonic logging,dipole sonic logging,acoustic and electric imaging logging data are used to identify the fracture of the reservoir and the logging response characteristics of fractured reservoir are summarized.The data results indicate that the well-developed reservoirs with fractures produce natural gas higher,so generally fracture is determined to be the main cause of high production in gas reservoir,which provides an important guidance for the exploration and reservoir evaluation of Daniudi gas field.