Study of Optimum Drilling Mud Formula

In the work, a study was made of the rheological and physical-mechanical properties of cement grout mixture and grout cements. For a qualitative cementing process, an analysis of cement slurries was carried out with a study of changes in the consistency of cement slurries after a certain time. Thus, the acceleration of the process of drilling observation and production wells depends on the correct selected cement slurry.Oil-based emulsion drilling fluids are divided into two groups - emulsions of the first type and the second - reverse or invert emulsions. If the first hydrocarbon liquid is dissolved, then the latter are represented by dissolved water in the hydrocarbon liquid.1 Thus, depending on what is the dispersed phase and what is the dispersion medium, groups of emulsions are determined. According to the purpose, the solutions are divided into two groups - drilling fluids and special fluids (for work over (work over) and underground well work over, perforating and conservation fluids).2 An alternative to oil-based mud (OBM) are polyethylene glycol-based muds that are environmentally friendly in use. OBM have disadvantages - low stability of physical and mechanical properties, significant material and time costs for their preparation and disposal, negative impact on the environment, labor intensity, dependence of mineral oils on external factors (temperature, pressure, chemical aggression of formation fluids).3 These problems with the use of OBM are solved with the use of synthetic and semi-synthetic oils, repeated use and an increase in the degree of "cut-off" of the oil during disposal.

To solve problems, the composition of the solution is provided using emulsion medium viscosity oils such as VMGZ 60 and VMGZ 45; emulsifier reagents KES-1M and KES-1C; regulators of rheological properties of organophilic clays (organobonite, beto-34), surfactants (surfactants) (neonol), biopolymers - PAC, KMK; to control the density of the drilling fluid - barite, calcium carbonate; in the defoamer - organosilicon liquids of the type Penta 467 or Penta 468 type. The composition and certain properties of the proposed solution inverter solution are given in table 1. According to the data from the table, it should be noted that the proposed composition of the solution can be weighted by introducing a weighted additive. However, other indicators of the solution do not differ from the earlier ones.

https://www.stephypublishers.com/tpe/pdf/TPE.MS.ID.000513.pdf 

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