Review article

HORIZONTAL WELL DRILL-IN FLUIDS

Nediljka Gaurina-Međimurec

Abstract

Main objective of horizontal driling is to place a drain-hole for a long distance within the pay zone to enhance productivity or injectivity. In drilling horizontal wells, more serious problems appear than in drilling vertical wells. These problems are: poor hole cleaning, excessive torque and drag, hole filling, pipe stucking, wellbore instability, loss of circulation, formation damage, poor cement job, and difficulties at logging jobs. From that reason, successful drilling and production of horizontal well depends largely on the fluid used during drilling and completion phases.
Several new fluids, that fulfill some or all of required properties (hole cleaning, cutting suspension, good lubrication, and relative low formation damage), are presented in this paper.

Keywords

horizontal wells; driling; fluids

Hrčak ID:

13468

URI

https://hrcak.srce.hr/13468

Publication date:

4.12.1998.

Article data in other languages: croatian

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