测井多井评价方法在崖城13-1气田的应用

Application of multiwell formation evaluation methodology in Yacheng13-1 gas field Ecnomic Recoverable Reserves (ERR)

崖城13-1气田由于测井时间跨度大、测井仪器的更新换代以及复杂的井眼环境,各井测井数据之间存在测量误差,这些测井数据直接应用于油藏描述时,经常会发现井震不匹配。以往崖城13-1气田经济可采储量(ERR)研究采用的都是测井单井评价方法,基本上是一口井一套处理参数,人为因素较大,经常会发现井间物性分布与沉积微相不符。提出了多井地层评价的方法,从区域上整体评价气田的岩石物理特征。从测井资料的环境校正和双峰标志层标准化入手,采用关键井模型研究、多井最优化处理、曲线重构误差分析、多井模型适用性和一致性分析的严格过程及质量控制,确保测井曲线及评价结果的可靠性。研究结果与岩心物性数据及区域地质背景符合完好,为气田的经济可采储量评价提供了精度更高的测井储层数据。

Yacheng13-1 Gas Field has characters of long logging time intervals,slow replacement of logging devices and complex borehole environment.So there is great error in reservoir description when well log data used for example well quake mismatch.The single well evaluation method in ERR research often causes disagreement between interwell physical property distribution and sedimentary microfacies because of the man-made factors.Multiwell formation evaluation technique has been applied to petrophysical study of Economic Recoverable Reserve in yacheng13-1 gas field.Strict workflow and Quality Control,such as log data environmental correction and normalization,key well evaluation model study and multiwell optimization processing,ensured the methodology and procedure to be correct.The study results show good accordance with core petrophysical parameters at the whole research region and provide higher accurate logging data for ERR evaluation.