Experience of geomechanical support of well drilling at the facilities of Surgutneftegas PJSC

UDK: 622.24.001.57

DOI: 10.24887/0028-2448-2026-7-92-96

Key words: geomechanical modeling, engineering and methodological support, well design

Authors: V.A. Moreva (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen); E.G. Malyarchuk (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen); T.V. Grosheva (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen); M.A. Dyusyungaliev (Tyumen Branch of SurgutNIPIneft, Surgutneftegas PJSC, RF, Tyumen)

The technology of scientific and methodological support for the construction of horizontal wells using geomechanical models has been implemented at PJSC «Surgutneftegas» since 2020 in order to select the optimal well design, safe drilling fluid density and drilling modes, based on well logging data of previously drilled wells, refined reservoir and hydraulic fracturing pressures, seismic profile, and core sample studies. Traditionally, the results of core studies, microscanners, the results of the extended leak test (XLOT-extended leak-off test) or the so-called stress tests (micro-fracturing), geological and technical monitoring data, sludge and cavernometry data are used as calibration data for building a geomechanical model. Based on theoretical studies and accumulated statistical materials it is proposed to include in the nomenclature of calibration information available data from geophysical surveys using the selective gamma defect thickness gauge, based on the interaction of gamma radiation with a material (rock, cement stone), which enables to interpret its characteristics (thickness, density, composition) and to evaluate the decompression zones. The use of the entire information obtained in the well design and construction cycle enables in the absence of actual values of the minimum horizontal stress, to calibrate the gradient of the well absorption onset, specifying the range of allowable density for trouble-free well construction. The article presents an implemented integrated approach to the construction of complex horizontal wells based on engineering analysis in the process of developing a drilling and completion strategy, an integral part of which is round-the-clock scientific and methodological support in real time.

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