基于气测录井的高温高压地层压力随钻监测技术  

Monitoring Technology of Formation Pressure While Drilling Under High Temperature and High Pressure Based on Gas Logging

作　　者：田立强 陈现军 付群超 TIAN Liqiang;CHEN Xianjun;FU Qunchao(China-France Bohai Geological Service Co.,Ltd.,Tianjin 300457,China)

机构地区：[1]中法渤海地质服务有限公司,天津300457

出　　处：《重庆科技学院学报（自然科学版）》2024年第1期21-26,共6页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：中国海洋石油有限公司“十四五”重大科技项目“海上深层/超深层油气勘探技术”(KJGG2022-0405)。

摘　　要：基于气测录井地层压力监测基本原理,给出高温高压地层钻井液静态当量泥浆密度(ESD)和钻井液循环当量泥浆密度(ECD)的计算方法,并在此基础上对高温高压井地层压力进行随钻监测。研究发现,当井底压差增大时气测值呈指数式降低,且当井底压力处于过平衡状态时气测值不会降至0,而是保持一个较低的数值水平。据此分析泥浆循环气与循环压差以及单根气与静压差的相关关系,建立井底压差与气测值的相关方程,进而对地层压力作出定性和定量评价。Based on the basic principle of gas logging pressure monitoring,the calculation methods of static equivalent mud density(ESD)and circulating equivalent mud density(ECD)of drilling fluid under high temperature and high pressure formation are presented.On this basis,monitoring,while drilling,on formation pressure of well under high temperature and high pressure is carried out.It is found that when the bottom-hole pressure difference increases,the gas measurement decreases exponentially,and when the bottom-hole pressure is over-balanced,the gas measurement will not decrease to 0,but maintain a low level.Based on this analysis,the correlation between circulating gas and circulating pressure difference as well as single gas and static pressure difference is established,and the correlation equation between bottom hole pressure difference and gas measurement value is established to evaluate the formation pressure qualitatively and quantitatively.

关 键 词：气测录井 地层压力 随钻监测 高温高压 

分 类 号：TE51[石油与天然气工程—油气田开发工程]