英台气田地区区域地层压力分析

Analysis on regional formation pressure of Yingtai Gas Field

在钻井工程领域,利用多口邻井的地质资料进行融合处理,可以减小待钻井地质参数预测的真值分布范围,对于提高钻井作业安全系数、增大钻进有效作用深度、降低钻探过程所需的成本以及对油气管道和储层的保护等有重要意义。根据测井、井史、试油及地层测试等资料分析结果,利用Eaton法对完钻邻井测井数据进行单井地层压力的加权解释,建立了英台气田地区的地层压力剖面;考虑地层复杂性和多变性,地质参数的数据解释误差是确定存在的,以及地层的空间分布特性和地层深度对地质属性的影响,以地层组为单位,利用深度平差技术和反距离插值方法,分析了英台气田地区地层压力的区域分布规律,给出了该区的地层压力分布范围,对英台气田地区四方台组和嫩江组与姚家组、青山口组、泉头组、登娄库组以及营城组地层分别建立了正常压实趋势线,为英台气田区块有效地减小待钻井地质参数预测的区间、提高参数预测的精度、整体深度开及及时发编制钻井工程方案提供依据和技术支撑,从而更精确掌握该地区的复杂地层信息,为重要钻采作业打下坚实基础。

In the field of drilling engineering,by the geological data fusion of many adjacent wells,the range of true value of the prediction of drilling geological parameters can be reduced.And it has very important significance to ensure the safety of drilling,improve drilling efficiency,reduce the cost of drilling,as well as in time to take measures to protect the oil and gas.According to well logging,well history,oil testing and formation testing data,establishing the formation pressure in Yingtai gas field,weighted interpretation of single well formation pressure using Eaton method for logging data of completion well.Considering the complexity and variability of petroleum geology,error is the objective existence and the effect of spatial distribution of stratacharacteristics and strata depth on geological properties,taking formation group as an unit,the regional distribution law of formation pressure was analyzed using the depth adjustment technique and inverse distance weighted interpolation,then the formation pressure distribution range was given,the normal compaction trend line of Sifangtai Formation and Nenjiang Formation,Yaojia Formation,Qingshankou Formation,Quantou Group,Louku Formation and Yingcheng Formation were established,which effectively reduced the interval of drilling geological parameters and improved the accuracy of prediction and provided theory and technical support for drilling engineering project.It can be more accurate to grasp the complex formation information in this area,and lay a solid foundation for the important drilling and production work in the future.