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本文对现场录井过程中东营凹陷沙四段膏盐层的卡取过程进行了总结,归纳出针对膏盐层的“钻前预测+钻中控制”的卡取流程。同时,对膏盐层准确卡取的意义进行了浅要分析,包括:在确定钻遇膏盐岩地层、达到钻探目的后提出完钻意见,从而节省钻井进尺,缩短建井周期,节约大量勘探资金;为钻井提供准确的异常预报,提出调整钻井液意见,有效地遏制(盐)水浸等工程事故的发生;有利于对所钻井区块膏盐岩地层的特征及展布情况形成新的认识,对下一步该区块的勘探部署及地质设计的编写起到一定的指导作用。
This paper summarizes the process of picking up the gypsum salt layer in Sha 4 section of Dongying depression in the process of site logging, and summarizes the process of card insertion for “pre-drilling prediction + drilling control” of gypsum salt layer. At the same time, a brief analysis of the significance of accurate grading of gypsum salt includes: putting forward drilling suggestions after determining the formation of drilling salt and salt rock formations and drilling, thus saving the drilling footage, shortening the well construction period and saving a lot of exploration Funds; provide accurate anomaly forecast for drilling, put forward the opinion of adjusting drilling fluid and effectively stop the occurrence of engineering accidents such as salt water flooding; help to form new characteristics and distribution of gypsum-salt stratum in the drilling area Understanding, the next step of the exploration and deployment of the block and geological design play a guiding role.