东海深部致密储层主要钻井技术及其应用

Key drilling technologies in deep tight reservoir in the East China Sea and their application

摘要:

随着东海对深部致密储层油气资源的勘探开发，深井、超深井钻井面临的地层埋藏深、压力体系复杂、地层可钻性差、裸眼段长、井斜大等难题，需要研究可行的技术方案加以解决。为此，2012年以来，在东海实施的深井、超深井中，通过应用深井井身结构优化、高效抗摩减阻剂、动力导向和复合冲击提速技术、井口回注固井技术和随钻声波固井质量评价技术，实现了安全、快速的钻井效果。上述技术的应用对致密地层钻进、提高钻井速度、缩短钻井周期、降低作业成本、获得更好的经济效益，具有重要的保障作用。

Abstract:

With the exploration and development of oil and gas resources in tight reservoir in the East China Sea, the difficulties such as the deep buried reservoir, complex pressure system, poor drillability, long open hole, high deviation angle must be solved by means of the feasible technical solutions. Since 2012, safe and efficient drilling has been achieved by applying the deep well casing program optimization, high efficiency wear-resistant additive, cuttings bed removal technology, power-steering and composite impact drilling technology, wellhead reinjection cementing and acoustic logging while drilling for cementing quality evaluation technology during the implementation of the deep and ultra-deep wells in the East China Sea. The application of the above technology has an important role in drilling tight strata, improving the drilling rate, shortening the drilling period, reducing the operating cost and obtaining good economic and social benefits.