Microorganism solid phase-free drilling fluid and preparation method thereof

Abstract

The invention discloses a microorganism solid phase-free drilling fluid and a preparation method thereof. A microorganism solidification technique is combined with a geological drilling technique, onthe basis of a solid phase-free drilling fluid system which is most widely used in geological drilling, microorganisms are introduced into the system, calcium carbonate gel is generated through induction of vital activities such as metabolism of the microorganisms, the completeness and the physical-mechanical properties of loosened and broken stratum hole wall surrounding rock can be improved, drilling hole walls can be solidified, and the problem of instability of walls of drilled holes in a loosened and broken stratum can be solved. Microorganism bacteria capable of inducing generation of calcium carbonate gel or other gel and other polymer type drilling fluid materials can also be selected to prepare microorganism solid-phase-free drilling fluids of different formulae according to the technical idea of the scheme of the invention.

Description

technical field [0001] The invention specifically relates to a microbial solid-free drilling fluid and a preparation method thereof. Background technique [0002] The instability of borehole walls in loose and broken formations has always been a technical problem faced by geological drilling. In addition to causing huge economic losses, it often delays the exploration and development of minerals. At present, the problem of hole wall instability in loose and broken formations has not been effectively solved. For a long time, the research on the instability of the borehole wall has mainly focused on two aspects. On the one hand, the mechanism of the instability of the borehole wall is studied to reveal the cause of the instability of the hole wall; on the other hand, the drilling fluid that stabilizes the hole wall is studied. system and its mechanism of action. In terms of the mechanism of hole wall instability, everyone agrees that the failure and instability of the surrou...

AI Technical Summary

Problems solved by technology

[0003] However, most of these studies are aimed at the mud shale formations often encountered in oil drilling, but for the loose and broken formations that are often encountered in geological drilling projects such as geological prospecting drilling and engineering geological exploration drilling. , but not involved in deep

In geological drilling engineering, when the hole wall instability occurs in loose and broken formations, due to the lack of corresponding theoretical and technical guidance, it is often only possible to copy the drilling fluid technology in oil drilling engineering to deal with complex formations such as mud shale formations, but Little benefit and high cost, difficult to adapt to the characteristics of the geological drilling industry