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Various methods for computing the terrain correction in a high‐precision gravity survey are currently available. The present paper suggests a new method that uses linear analytical terrain approximations. In this method, digital terrain models for the near‐station topographic masses are obtained by vectorizing scan images of large‐scaled topographic maps, and the terrain correction computation is carried out using a Fourier series approximation of discrete height values. Distant topography data are represented with the help of digital GTOPO30 and Shuttle Radar Topography Mission cartographic information. We formulate linear analytical approximations of terrain corrections for the whole region using harmonic functions as the basis of our computational algorithm. Stochastic modelling allows effective assessment of the accuracy of terrain correction computation. The Perm Krai case study has shown that our method makes full use of all the terrain data available from topographic maps and digital terrain models and delivers a digital terrain correction computed to a priori precision. Our computer methodology can be successfully applied for the terrain correction computation in different survey areas.

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Рассмотрены результаты разработки технологии модуля индукционного ком-плекса (МИР), предназначенного для измерения сопротивления пород в процессе бурения горизонтальных и наклонно-направленных скважин на нефть и газ. Представлены материалы производственно-технологического опробования при проведении эксплуатационного бурения промысловых скважин на территории Республики Башкортостан. Выполнен сопоставительный анализ данных карота-жа сопротивления, полученных после завершения бурения, и результатов, за-фиксированных комплексом МИР в составе LWD с телесистемой «ТАРГЕТ» в процессе бурения. Приведены технические характеристики параметров комплек-са МИР. Ключевые слова: сопротивление пород, горизонтальные и наклонные скважины, месторождения нефти и газа, модуль индукционного ком-плекса (МИР), технология, LWD, телесистема «ТАРГЕТ».

In the given work, on the basis of the carried out researches at the decision of seismic surveying tasks an attempt on advancement of methods and means of excitation of elastic vibrations by the generator of seismic vibrations (GSV) is made. The geometry of the real GSV differs from the ideal axially symmetric form resulting in deviations of parameters of geometry of mass (deviations of the centre of mass, main central axes of inertia), and is a consequence of the static and dynamic disbalance.The character of forces and moments acting on the GSV, as a whole and on separate units, depends on quality of the law of change of total force of resistance of escapement and return of plunger; dynamic loads resuling in occurrence of transverse waves at excitation of seismic vibrations deterioting the accuracy of determination of well bottom position are formed.