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Horizontal Wells. Problems and Prospects 2015
- Conference date: October 20-22, 2015
- Location: Moscow, Russia
- Published: 20 October 2015
21 - 24 of 24 results
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A Novel Approach of Horizontal Wells Accounting in Geology and Hydrodynamics Modeling for Accuracy Improvement in Estimation of the Wells Starting and Cumulative Performance
Authors S.G. Gorunov, I.V. Evdokimov and S.G. EvdokimovaSummaryThe work represents a novel approach for constant updating and monitoring of the geological and hydrodynamic models during the period of an active infill drilling by horizontal wells. More than 150 wells were designed and supported during geosteering using 3D models. Moreover the strategy of the infill drilling program was optimized every time new data was available after drilling and set into production each new well. Applying the current approach, efficiency of net sand penetration was increased from 65 to 80% of the borehole length and average starting oil rate increased from 40 to 52 t/day.
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The Size of the Cells at Geological Model with Horizontal Wells
Authors V.S. Vorobyev and N.A. AipovSummaryThe paper presents a method to encounter geological parameters while selecting 3D size of model grid blocks with horizontal wells. Averaging of logging interpretation results in horizontal wells in grid geological model causes distortion of the source parameters. Along with the grid size, such parameters as facies part, compartmentalization, and zenith angel of wellbore of horizontal well have the biggest impact on quality of properties transfer. The obtained results allow selecting reasonably vertical and lateral grid block size and evaluating uncertainties in reserves volume
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Inflow Stimulation of Horizontal Wells for Reservoir of Low Permeability
Authors V.A. Shmelev, Y.P. Serdobintsev and P.N. AntoshkinSummaryOne of the major problems in the power supply in the country is the oil recovery enhancement. The major part of the reserves is discovered in low-permeability reservoirs that are to be developed using innovative enhanced oil recovery methods. The most progressive method to increase difficult oil production is the shift to field development with horizontal wells (HW) and multilateral wells (MW). At the same time the field experience to date shows worse efficiency of horizontal wells if compared to the design values.
Evaluation of oil and gas filtration in reservoir with account of the physical and mechanical processes influencing their movement allows for estimation of industrial oil and gas reserves and for the selection of the activities for their best recovery.
The study of the Van der Waals forces suggests that in the process of oil molecules moment in porous medium their dipole moments are chaotically oriented at the areas within the soil particles contact. This increases the concentration of polar molecules and the formation of stable polymolecular layers.
The electromagnetic field changes the orientation interaction between the dipoles (molecules) and, consequently, the effective cross section of the pore channels and the rock permeability increase. This facilitates the oil inflow into the well
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Challenges, Status, and Prospects for the Development of Well Log Interpretation in Horizontal Wells in Russian Federation
Authors N.V. Schetinina, A.V. Malshakov, M.A. Basyrov and I.A. ZyryanovaSummaryThe issues of development of a method for quantitative formation evaluation in horizontal and highly deviated wells have been unaddressed for a long time due to complexities of geophysical fields distribution in such conditions and absence of proven algorithms of well logs forward solution. The latest advances in numerical modeling of nuclear and electrical well logs implemented in Techlog software made it possible to improve the quality of well log interpretation. The article presents approaches to spatial interpretation of data from horizontal and highly deviated wells using a method of forward modeling of well log response and reconstruction of “true” values of geophysical parameters of the formations intersected by a well, and compares the obtained results with actual data and conventional approaches. The first positive results were achieved, which demonstrated the prospects for further development of the research trend and the necessity of its improvement in the domain of account for the anisotropy of acoustic rock properties, reconstruction of true values of p- and s-waves, and seismic facies modeling
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