随钻中子伽马能谱测量系统

摘要

在勘探开发油气资源的工程中，划分地层岩性寻找气层划分油水界面和气水界面的重要手段是对储层伽马能谱测量和分析。而随钻中子伽马能谱测量方式实时性好、效率高，能够最大程度的降低钻井液对地层入侵的影响，更准确地反应出原状储层的性质。能使井眼轨迹保持在储层内，为地质导向钻井工程准确顺利施工提供重要测量参数。中子伽马能谱测量系统向储层发射中子束，并测量和分析中子与储层元素发生作用时产生的伽马能谱来确定地层的岩性。为此设计一套随钻中子伽马能谱测量系统，其可以提高地质导向钻井系统性能，提高油气储层钻遇率。%In the development of oil and gas exploration project,the method of the neutron Gamma ray spectrometry with drill bit has good real?time performance and high efficiency,can reduce the impact of drilling fluid on the stratum invasion to the greatest extent,keep the trace of the well in reservoir layer,and provide important measuring parameters for a geosteering drilling project. The neutron gamma ray energy spectrometric system emits the neutron beam to the reservoir layer,and the mea?sures and analyzes the gamma ray spectrum produced when the neutron and elements in the reservoir layer militate,so as to de?termine the lithology. To achieve the purpose,a neutron Gamma energy spectrometric system working with drill bit is designed, which can improve the performance of the geosteering drilling system,and the drilling meeting rate of oil and gas reservoirs.