基于测井资料的地层压力分析技术

TECHNOLOGH FOR FORMATION PRESSURE ANALYSIS BASED ON LOGGING DATA

准确的地层压力剖面是合理钻井工程设计的基础,是钻井液及井身结构设计不可缺少的关键数据。而测井资料是有效确定地层压力的基础性资料。为此,通过地层压力分析的基本理论和方法研究,结合DrillWorks2005软件中压力预测分析系统的应用,提出了利用自然伽马、电阻率、声波时差等测井资料进行综合分析,进而预测地层孔隙压力、地层破裂压力、地层坍塌压力的模式。经吉林油田部分井次的实际验证,预测精度可满足工程要求,为钻井工程技术路线的确定和钻井施工提供重要依据。

Exact formation pressure profile, the basis of rational drilling engineering design, is the key data of drilling fluid and well bore design. And the logging data is the basal data for ascertaining formation pressure. Accordingly, through the studying on the essential theoretics and method of formation pressure analysis, with the application of the pressure prediction analysis system (DrillWork 2005), the paper introduced a pattern to predict formation pore pressure, fracture pressure, collapse pressure, by synthetically analyzing some logging data of spontaneous gamma, resistivity, interval transit time, etc. After practical verification in part of wells of Jilin oilfield, the precision can suffice the engineering demand. It provided the important gist to confirm drilling engineering technical route and drilling project.