Territorija Neftegas № 5 2013
Read in this issue:
» Optimization of control technological oil refining processes according to indices of technical and economic efficiency (on the example of tar viscosity breaking)Open PDF
The solution of the task of increase process efficiency by indices of technical and economic efficiency can be described as sequence of the solution of tasks of determination finite control alternatives providing the given quality indices of received products, and calculation of technological self-cost of a product as criterion of operational optimization by indices of technical and economic efficiency.
Keywords: control optimization, indices of technical and economic efficiency, process modeling, minimum cost of control.
» Operational management of polyethylene production in terms of quality (melt index)Open PDF
Currently, in the production of polyethylene to maintain the quality (melt index) is used manual control mode. Determination of the melt index is carried out on laboratory analysis, which results in a large delay in the management process and, as a result to unacceptable variations of the product. We explore how to create an automated process control system in terms of quality, which is evaluated by using the model. Investigation of quality management systems with different controllers (PI controller and the controller based on fuzzy logic) is conducted on a simulation model.
Keywords: Polyethylene, melt index, polymerization, control, quality, fuzzy logic.
» Foamed cement insulation material for elimination of high absorptionOpen PDF
The paper presents study results of foamed cement insulating material designed to isolate areas of high-intensity adsorption of borehole fluids during drilling. It is shown in terms of surface and downhole. Also, presented method for preparation of the material.
Keywords: well, absorption, insulation, foamed cement.
» Influence of chamfer on the cutting edge of the polycrystalline diamond cutter on the parameters and performance PDC bitsOpen PDF
This article shows an appraisal of influence of the chamfer on the cutting edge of the polycrystalline diamond cutter on the parameters and performance of the PDC bits as a whole and their individual cutters, based on the results of laboratory bench drilling.
Keywords: PDC bits, polycrystalline diamond cutters, laboratory bench drilling, parameters and performance of the PDC bits
» Stuck pipe recovery – smart-gels improve resultsOpen PDF
A challenging and costly situation to overcome in modern day directional drilling applications is stuck pipe in open hole due to differential and/or mechanical sticking forces and presence of clay cuttings accretion. Despite mitigation efforts to reduce stuck-pipe occurrences, drilling problems leading to stuck pipe still occur. Chances of recovery decay with time and conventional pipe released method with a oil-based antistick fluid frequently unsuccessful. The SMART-gel offers a new level of pipe released technology that maximizes the effect and reliability of recovery operation in challenging wellbore environments, where conventional recovery techniques are deemed insufficient. This increased efficiency offers substantial reduction in lost time, and an increased potential for well recovery. By incorporating pore-blocking technology and ability to accretion destruction, the recovery reliability and effectiveness improve exponentially
Keywords: stuck pipe, lubricant, bail, friction factor, friction resistance, drill collars, cuttings accretion
» Development of plugging material for placing of cement plug in hydrophobic environment of oil-based mud (OBM)Open PDF
The experience of cement plugs installation for various purposes in hydrophobic environment of oil-based mud (OBM) in the fields of the Perm territory showed low efficiency of traditional technologies. The article highlights progress and results of new cement-based plugging material development for cement plugs installation in hydrophobic environment of OBM.
Keywords: invert emulsion solution, plugging materials, cement plugs surfactants, well, support plug.
» Updating isolation cement slurry to present-day drilling conditions on Volga-Ural fieldsOpen PDF
Various cement slurries used to isolate thief zones are analyzed, their disadvantages are detected and the ways for further development are outlined. The laboratory analysis results of lightened foam cement composition are presented.
Keywords: lost circulation, isolation, foam cement, well.
» On the need to study non-uniformity of multilayer formations of oil fields using geostatistical methodsOpen PDF
The current stage of design of oil fields development in Russia is characterized by widespread use of three-dimensional digital geological and hydrodynamic modeling. Moreover, despite modest provision of models with the initial geological and commercial information, requirements to quality of 3D models recently created in the industry are being increased.
Keywords: geostatistics, oil field, producing layer, sublayer, multilayer formation, layer-by-layer non-uniformity, flooding factor, oil recovery ratio
» Research zeolites influence to reliable determination of petrophysical parameters neocomian deposit sin zapolyarnoye fieldOpen PDF
Results of researching zeolite terrigenous neocomian reservoirs in Zapolyarnoye field are presented in the article. Structure of pore space of laboratory rocks samples and rocks at reservoir conditions is significantly different. This is the main reason which causes difference in reservoir’s saturation estimation between petrophysical data and well test.
Keywords: terrigenous reservoir, cement, zeolite, caporcianite, porosity, neocomian deposits, horison BT6-8, Zapolyarnoe field.
» On selection of gas lift wells operation of mature gas production fieldOpen PDF
This article presents gas lift operation as steady-state system (stationary gas lift). Given calculation procedure, based on special studies results, provides both an overall assessment of gas lift wells operation feasibility in each case, and calculations of process parameters at all process stages to achieve maximum efficiency in use of gas lift.
Keywords: gas lift, stationary/intermittent, gas lift efficiency factor, injection flow rate, reservoir production rate.
» Synergistic effect in the acid generating systems, based on the acetic acid esters solutions with a surfactants mixtureOpen PDF
Efficiency of the acid treatment in the case of low permability significally depends on the interfacial tension between the acid composition and the hydrocarbon phase. Interfacial tension of the acid generating systems, based on the acetic acid esters, can be significantly decreased due to the synergistic effect caused by the co-action of the alkylbenzenesulfonic acid and quaternary ammonium surfactants.
Keywords: acid treatment, acid generating systems, metyl acetate, alkylbenzenesulfonic acid, betaines, surfactants.
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