化学-质量法碳酸盐岩定量分析技术及应用

Chemistry-mass method for the technology of carbonate rock quantitative analysis and its application

钻井大提速主要使用PDC钻井、气体钻井新技术新工艺,钻速的大幅度提高给录井的岩屑鉴别增加了难度,影响了岩屑录井剖面质量和碳酸盐岩储集层的发现。传统的碳酸盐岩鉴别法满足不了现代钻井工艺条件下的录井要求,采用新型碳酸盐岩分析技术能够比较准确地分析出岩石的主要成分如白云石、方解石的含量,用于岩性鉴别、地质卡层、储集层发现和沉积相带分析。该项技术采用化学-质量法,和老式碳酸盐岩仪的化学-压力法相比,具有分析周期短、操作简单、数据准、精度高的优势,已在四川和塔里木油气田的碳酸盐岩录井中应用,取得了明显的效果。在阐述新型碳酸盐岩分析技术的勘探需求和技术现状、方法原理和技术优势并介绍其应用效果的同时,评价了该技术的应用前景,为该技术在碳酸盐岩探区的推广应用提供了指导。

The speed-up drilling mainly uses PDC drilling and new gas drilling technologies and the substantial increase in drilling speed has brought more difficulties for the cuttings identification in mud logging, which affected the quality of cutting logging profiles and the discovery of the carbonate rock reservoirs. The traditional identification method for finding the carbonate rock can not meet the requirements of mud logging under the conditions of modern drilling technology, thus new technology of carbonate rock analysis has been used in the field, with which the major components of rocks can be more accurately analyzed, such as dolomite, calcite content, lithology identification, geological layers sticking, reservoir discovery and sedimentary facies belts analysis. The technology uses chemistry - mass law, and compared with chemistry - pressure method of the older carbonate rock analyzer, its analysis circle is short, the operation is simple with accurate data and high accuracy. The method has been applied in carbonate rock mud logging in Sichuan and Tarim oil and gas fields and achieved significant results. The authors described the exploration requirements, technical status, methods, principles and technical advantages of the new carbonate rock analytical techniques and at the same time evaluated the application prospect of the technology, providing the guidance for the technology spread and application in the carbonate rock exploration area.