«Onshore and offshore oil and gas well construction»

Comparative analysis of the process of drilling modes optimization by drilling supporting wells and the "learning curve"

UDC: 622.24.05
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russia
² Drill Lab AI, Hadbad Al Zafran, United Arab Emirates

Keywords: well drilling optimization, roller bits, support and technological wells, technical limit, learning curve

Annotation:

For many years, the world's leading oil and gas drilling and service companies have been using a method that involves analyzing the "learning curve" to optimize well drilling time and achieve the technical limit. In 1960–1970s, Soviet scientists developed an alternative approach based on drilling support wells, which was approved at the state level and used throughout the former USSR territory until the early 1990s. The authors of the article present the results of a study devoted to a comparative analysis of both methods as applied to the problem of choosing a rational drilling using roller cone bits. It has been revealed that if the planned number of wells in a certain area makes at least four, and the predicted excess of the drilling time of the first well is at least 2,6 times over the "technical limit", then drilling of support and technological wells is more economically efficient. The research continues and the next article will be devoted to the problems of well drilling optimization by unsupported cutting type drill bits. The research includes analysis of the results of drilling modes optimization by blade bits in the USSR, which are similar to PDC in the rock destruction mechanism, but differ in the resource, i.e. they quickly lose cutting ability, as well as modeling changes of penetration mechanical rate of modern PDC bits as the structure wears out using neural networks.

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