Today the solids control efficiency (SCE) and the drilled solids content are of high importance. The SCE impact on technical and economic indicators of well drilling in Western Siberia has been analyzed based on the accumulated statistical data in this article. A special registration form has been developed to systematize the information collection. One entry of the register corresponds to one complete well interval (production hole, horizontal wellbore, sidetrack) and contain required parameters and SCE. The quality of the initial information is checked, incorrect data are excluded, before analysis start. The solids control register has been implemented on three projects in Western Siberia, more than 3000 entries have been consolidated in current state. Data collected statistics on 200 drilling rigs and 10 drilling fluid service companies. The authors identified key parameters for evaluating the SCE: rate of penetration; non-productive time; specific volume of drilling fluid preparation; solids content; average number of deviations of drilling fluid parameters. Production holes, horizontal wellbores, sidetracks were analyzed. According to collected information SCE ranges from 20 to 90%. Increasing in the SCE up to 90% in production hole section (220.7 mm hole size, 1563 m average length) leads to decline in specific volume of drilling fluid preparation per 1 m of drilling by 28%, in solids content – by 12.1%. The average number of deviations of drilling fluid parameters per well is reduced by 61.5%. Equipment washout risks are reduced by 63%. Well construction rate increases (32%).Optimizing solids control equipment showed economic effect. The additional dilution volume of drilling fluid (in absence of solids control efficiency optimization work) and the waste volume caused by low SCE for the production hole section was 7.58%, for horizontal wellbore section – 9.73%, for the sidetrack – 8.73%. The importance and potential of improving the SCE is demonstrated. Control and management solids content by the efficient operation of the solids control equipment allows to reduce direct well construction costs.
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