DRILLING BUSINESS-ACCENT SPECIAL APPROACH TO UNIQUE FIELD DRILLING FLUIDS FOR DRILLING AT MESSOYAKHA Yelena Alifirova 38
<strong>Neftegaz</strong>.<strong>RU</strong> # 3/20<strong>17</strong> WELL DRILLING AT MESSOYAKHSKOYE FIELD HAS A RANGE OF GEOLOGICAL PECULIARITIES. THE MAIN PRODUCTIVE STRATA ARE REPRESENTED BY TERRIGENOUS RESERVOIR, WHICH ARE VERY SCATTERED IN A HORIZONTAL SENSE AND IN TERMS OF SECTIONS. OIL-BEARING CAPACITY OF THE AREA IS DETERMINED BY CENOMANIAN HORIZONS. ALL FIELDS OF THE GROUP ARE CHARACTERIZED BY PRESENCE OF A SIGNIFICANT GAS-CAP, WHICH, FOR EXAMPLE, DOES NOT ALLOW TO USE STANDARD WAYS OF PRODUCTION STIMULATION AT VOSTOCHNO (EASTERN)-MESSOYAKHSKOYE FIELD TO THE FULL EXTENT. THESE AND OTHER PECULIARITIES DURING WELL CONST<strong>RU</strong>CTION IMPOSE HEIGHTENED REQUIREMENTS TO USED TECHNOLOGIES AND MATERIALS AND ALSO, IN PARTICULAR, TO QUALITY OF THE WASHING LIQUID UDC 622.244 BUSINESS-ACCENT KEYWORDS: drilling, drilling fluids, Messoyakhskoye field, Siberian Service company, washing liquid. Mining-and-geological characteristics of the section at Vostochno-Messoyakhskoye oil, gas and condensate field have led the specialists of Siberian Service company, which carries out drilling works, to a range of geological challenges. An answer to these challenges, connected with heightened requirements to quality of the washing liquid, became special drilling fluid formulations, producing the maximum effect at drilling in the northernmost points of the country. The formulation has been selected on the basis of increase in thermal resistance, stability and reinforcement of the borehole. When choosing the drilling fluid at this field, the specialists have paid special attention to ensuring of high quality of the producing horizon drilling-in. FACTS East Messoyakha oilfield is the third project successfully implemented by Gazprom Neft in the Arctic, following Novoportovskoe and Prirazlomnoe fields 150- 400 tons per day – launch flow rate of the well at Messoyakha oilfield 4.2 mln tons of oil – estimated output at the Messoyakha oilfield for 2018 Clay mud, polymer-clay, polymer-clay inhibited, biopolymer inhibited solution “EKTA-SIL”, and also heatresisting fluid “EKTA-TERM” have met imposed requirements to the full extent. Components of these drilling fluids do not adversely affect the soils, which is very topical, taking into account ecological fastidiousness of the northern regions. And such properties, as increase of the borehole stability and resistance to high temperatures, make possible to use these drilling fluids on the fields in any other regions. The services on drilling-fluid services are provided by Siberian Service company, the branch of SSK-Technologiya. Subdivisions of the branch in the regions, where SSK operates, allow to carry out these works both for subdivisions of SSK itself, and for the third-party customers. When developing programs on preparation of drilling fluids and their laboratory check, all the customer’s requirements and peculiarities of the well are taken into account. At the facilities, industrial engineers ensure control over preparation of the drilling fluid and tracking of the process of its use, prompt response to change of drilling conditions. 39
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