Day 2 Tue, October 16, 2018最新文献

{"title":"Casing Design Optimization and Technologies Improvement of Horizontal Wells Construction on the Objects of PJSC LUKOIL in West Siberia","authors":"L. Bondarenko, D. L. Bakirov, V. N. Kovalev, M. Fattahov, Vadim Fatihov, G. Mazur","doi":"10.2118/191496-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191496-18RPTC-MS","url":null,"abstract":"\u0000 The applying of the horizontal wells during 10-15 years is one of the key direction to improve the effectivity of the development traditional and new hydrocarbons’ fields.\u0000 The building of the horizontal wells usually performs in Cretaceous and late Jurassic systems by LLC «LUKOIL - West Siberia». The typical well's construction consists of the directional casing pipe (⌀323,9 mm); conductor (⌀244,5 mm); production casing (⌀177,8 mm) till the production back and liner string (⌀114,3 mm).\u0000 To optimize the construction of well due to long duration it was offered the optimized construction (3 stages) for horizontal well, which consists of directional casing pipe (⌀323,9 mm); conductor (⌀244,5 mm); production casing (⌀146 mm). (Fig. 1)\u0000 The drilling of horizontal wells with such construction was had high level of non-productive time in 1990. It was due to imperfection of technical and technological solutions, equipment and materials for drilling and completion, that was applied in past.\u0000 Because of the positive experience of the applying a new equipment types for bottom hole assembly, drilling fluids, survey technologies during the drilling, multi-stage fracturing, it was actual return to 3 stage horizontal well's construction because it was appeared the opportunity of the doing troubleproof works such as the waiting of cement consolidation around production casing, mounting and hydraulic proof test of the blow out equipment, changing the equipment to drill the liner string's interval, doing geological investigations and other operations. Besides the placement of full-opening casing (⌀146 mm) in horizontal interval allows more technological well's completion and to conduct re-multistage fracking, to investigate and to doing maintenance and isolation operations into the horizontal interval by the traditional technologies and equipment, and another operation into the interval of the productive strata.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130109728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Refracturing of Multistage Horizontal Wells in PJSC Gazprom Neft","authors":"A. Ogorodov, A. Ostashuk, S. Barkalov","doi":"10.2118/191705-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191705-18RPTC-MS","url":null,"abstract":"Since 2011 most newly commissioned wells at Gazprom Neft fields are horizontal (Hz), subjected to multi-stage hydraulic fracturing (multi-stage frac). To date, about 1,300 horizontal wells with multi-stage frac, equipped with packer-port liner assemblies (non-cemented), ball- activated, including about 800 wells equipped with single-action fracturing collars, have been drilled at the Company's fields.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134322908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Productivity Prediction Hybrid Model for Multi-Fractured Horizontal Wells in Tight Oil Reservoirs","authors":"Liang Tao, Jianchun Guo, Xiaofeng Zhou, A. Kitaeva, Jie Zeng","doi":"10.2118/191714-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191714-18RPTC-MS","url":null,"abstract":"\u0000 Productivity analysis relates to the quantitative evaluation of factors for individual members as well as to their comprehensive influence. It is difficult to describe the nonlinear relationship of various factors. A novel and original combination of grey relation analysis (GRA) and fuzzy logic productivity prediction hybrid model is proposed in this study to solve the problem. First, based on the parameters of the constructed wells, several elements were chosen as appraisal factors. The multi-level appraisal system was established to describe the nonlinear relationship of various factors. Then, GRA was used to calculate the weight factor and determine the main factors that influence the result of multi-fractured horizontal wells (MFHWs). Finally, coupling GRA with fuzzy logic to calculate the comprehensive evaluation score (CES), which is used to predict productivity and determine the classification value of the reservoir to evaluate the reservoir quality. The hybrid prediction model has been successfully applied to 18 wells of the tight oil field in Northeast China. Practical application results demonstrated a good agreement between the measured initial production and the output of the hybrid model. The new model can be used to predict production for MFHWs quickly and economically.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121085962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coastal Erosion at Kharasavey Gas Condensate Field, Western Yamal Peninsula","authors":"N. Belova, Natalia Shabanova, S. Ogorodov, A. Baranskaya, A. Novikova, D. Aleksyutina","doi":"10.2118/191727-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191727-18RPTC-MS","url":null,"abstract":"\u0000 The purpose of the work is to quantify the process of the Kara Sea permafrost coasts destruction near the Kharasavey settlement and the port of Kharasavey gas condensate field at Western Yamal under the conditions of changing climate and human impact, and to estimate possible rates of further destruction. For this purpose, the spatial and temporal variability of coastal destruction rates has been investigated since 1964, the geomorphological and permafrost structure of the coastal zone has been studied, the time series of the main hydrometeorological parameters affecting the retreat rates have been calculated. The estimation of coastal retreat rates was carried out on the basis of the field data of the authors and analysis of multitemporal aerospace imagery (1964, 1977, 1988, 2006 and 2016). To characterize the hydrometeorological factors of the coastal dynamics, the wave load on the coastal zone (from 1979 to 2016) was calculated using data on the direction and speed of the wind and the duration of the ice-free period. To assess the thermal factor of coastal destruction, the freezing and thawing indexes were used.\u0000 Since the 1980s there is an increase in the hydrometeorological potential of the coastal destruction. An increase in the annual sum of negative temperatures (freezing index) provides less cooling of deposits in winter period. With an increase in the sum of positive air temperatures (thawing index) this leads to accelerated thawing of sediments during the summer period, preparing the material for mechanical removal by waves. Due to the increase in the duration of the ice-free period and the frequency of winds with directions favourable for waves generation in the coastal zone, the total wave load on the coast increases. Intensive destruction of coastal segments composed of icy loams in 2006-2016 is due both to natural factors and to the human impact imposed on them (dredging in the mouth of Kharasavey River, the seizure of material for construction needs from the beach and coastal bluff). It is recommended to use tideflat and beach in the area of the Cape Burunny, located at a distance from the infrastructure of the port and settlement, as a source of sand material.\u0000 Despite the low values of the hydrometeorological forcing of the coastal destruction in 1977-1988, it was during this period that the maximum retreat rates of the coast were observed. An analysis of the spatial arrangement of the retreated sections showed that the most likely cause of the increase in the rates of retreat was human impact (for instance, dredging for the needs of the port at the mouth of the Kharasavey River could led to a deficit of sediment in the northward section).\u0000 The first detailed data obtained on the spatiotemporal variability of the coastal dynamics for this area allowed a joint analysis of natural factors and man-made loads affecting the rate of coastal destruction. A forecast was made for further development of the coast in conditions of contin","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126729420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Non-Seismic Methods Development at Gazprom Neft","authors":"G. Grigoriev, O. Zakharova, E. Liubimov, N. Morozov, A. Kasyanenko","doi":"10.2118/191670-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191670-18RPTC-MS","url":null,"abstract":"\u0000 Field non-seismic methods are one of the strategic directions of geological exploration that can improve the scientific and technical assessment quality of oil and gas prospects of the studied areas. The main advantage of non-seismic methods in comparison with seismic works is the high mobility and low cost.\u0000 This article describes various technological solutions in the field of non-seismic methods. Within the framework of the work, perspective directions of development were evaluated and identified, with perimeter of geophysical, geochemical and geomorphological studies.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129426820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advanced Well Positioning with Magnetic Interference Based on Passive Magnetic MWD Ranging: Case Study","authors":"Oliver Eatough, M. Alahmad, Fabien Momot, A. Sikal, D. Reynaud","doi":"10.2118/191502-18rptc-ms","DOIUrl":"https://doi.org/10.2118/191502-18rptc-ms","url":null,"abstract":"\u0000 This paper presents an efficient application of Passive Magnetic Ranging (PMR) on the B3 well sidetrack drilled on the High Pressure/High Temperature (HP/HT) Elgin field in the UK Central-North Sea. The planning and execution of this sidetrack presented an escalated set of challenges beyond those encountered in standard well conditions due to the high temperature (HT), the potential for magnetic interference and collision avoidance constraints. The PMR method was deployed in order to mitigate the risk of, and ultimately resolve, magnetic interference. This resulted in minimised collision risk and safe achievement of the sidetrack in a HT environment.\u0000 Challenges were faced in the 12 ½″ section which resulted in the open-hole being plugged and abandoned below the 14″ casing shoe, with the drill-string cemented in place. A complex sidetrack was planned below the 14″ shoe. Reservoir target and collision avoidance constraints required the planned sidetrack well-path to be close to the abandoned branch, therefore magnetic interference was possible. PMR was planned in the case of interference. The aim was to make the preparation and operational deployment process as efficient as possible, while drilling this sensitive section. A work-flow was developed to manage the performance of ranging passes, specifically interfaces between all parties involved in operations. PMR was deployed to map the relative position of the well during periods of interference and develop ‘synthetic surveys’ to construct the well-path, allowing collision avoidance calculations by defining reliable projection ahead and thus permitting steering of the drilling assembly.\u0000 The PMR process was successfully deployed on B3 after experiencing high magnetic interference allowing drilling to continue to planned depth with limited impact on operations. This paper provides information on the application of independent PMR and processing aspects to be considered when defining relative wellbore position based on synthetic surveys. Understanding advantages and limitations of PMR opens up opportunities to benefit from this technique in similar challenging drilling applications and help to reduce operational risk and optimise cost. PMR can thus provide a viable alternative to Gyro While Drilling (GWD), where conditions do not allow or where the probability of magnetic interference is marginal and high tool costs could be incurred when potentially not required.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115212521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Experimental and Theoretical Study of Fracture Toughness Effect on Hydraulic Fracture's Geometry","authors":"Nikita Vladislavovich Dubinya, M. Trimonova, A. Tyurin, Y. Golovin, E. Zenchenko, A. Samodurov, S. Turuntaev, I. Fokin","doi":"10.2118/191630-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191630-18RPTC-MS","url":null,"abstract":"\u0000 The article is devoted to mathematical and physical modeling of the process of hydraulic fracture initiation and propagation in the material with known physical-mechanical properties. Fracture toughness was the main focus of the research as it is a parameter characterizing the rock's ability to resist fracturing process. This parameter alongside with rock elastic properties and pumping conditions is one of the governing parameters while considering the fracture propagation in terms of mechanics of brittle fracture. The study is aimed at understanding the impact of fracture toughness on geometric properties of a fracture by means of numerical modeling of laboratory experiments of hydraulic fracture propagation in a model material. The strength properties including fracture toughness of the used model material have been studied using the indentation methods. The difference between experimentally observed and numerically calculated (keeping in mind the estimated strength properties) fracture geometry is studied in the paper and the possible reasons for this difference are discussed.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133298635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Results Confirmation of Simultaneous Inversion for East Siberian Terrigenous Reservoirs","authors":"P. Emelyanov, A. Ostankov","doi":"10.2118/191682-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191682-18RPTC-MS","url":null,"abstract":"\u0000 New exploration projects with a scarcity of drilling data give much consideration to advanced high-density 3D seismic studies. Updated high-density seismic data is presumed to be utilized to build detailed geological reservoir models and substantially enhance further exploration drilling.\u0000 The latest developments in seismic data interpretation stem from inverse transformations of seismic data. Seismic data can be reviewed and interpreted by themselves, without inversion, however, this does not allow us to obtain the most detailed understanding of the structure of the formation, and under certain conditions can lead to an unreliable result. Benefiting from the efficiency and quality of seismic inversion, most oil and gas companies currently employ inversion technologies to enhance seismic data resolution and improve the prediction reliability and reservoir rock properties assessment accuracy, including with regard to porosity and net pay thickness. There are a host of various inversion technologies with some of them to be selected for the quantity and quality of prior geological and geophysical data, as well as for the specific needs to be addressed and the rock properties of of the section under study.\u0000 The key objective of this publication is to assess the potential of inversion transformations in predicting sweet-spots in terrigenous reservoirs forming part of a challenging seismogeological environment in Eastern Siberia. The simultaneous inversion validity analysis is based on the data obtained from two pilot boreholes of a newly drilled well.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125556503","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Comprehensive Approach to Improve the Efficiency of MSF is Implemented in PAO Gazprom Neft","authors":"E. Kazakov, E. Sayfutdinov, D. Bukharov, I. Fayzullin","doi":"10.2118/191709-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191709-18RPTC-MS","url":null,"abstract":"\u0000 A rather challenging situation in the oil and gas industry requires to improve the efficiency of field development models and reservoir stimulation methods (EOR). An important factor that determines an effective model is an increased oil recovery factor at the Gazprom Neft fields and additional oil production with a commensurate increase in costs. To improve the oil recovery factor, the first step was to drill new horizontal wells and sidetracks with a horizontal ending which allowed increasing the contact area of the well and the reservoir and involved new reservoir zones into the development, increasing its oil recovery. However, drilling of new horizontal wells and sidetracking alone, without the introduction of advanced completion technologies, does not allow to achieve the desired result and maintain the production rates.\u0000 Currently, many service companies have their own research centers and offer a huge amount of technologies, but in fact such technologies have not been tested at reservoir conditions of Russia's oil and gas fields. The main challenge is the development and implementation of new technological solutions within modern business strategies for completing wells with multi-stage frac assemblies.\u0000 The Company's teams have studied the world experience and the offers of service companies in the field of horizontal and multi-stag frac completion technologies, as well have analyzed all the proposed solutions and model history matching applied worldwide with regard to the Russian reservoir conditions. In many practical cases, the application of successful foreign technologies provided by the service companies at the conditions of Russian fields turns out to be \"raw\". To achieve success, an additional comprehensive development of technologies is required at the planning stage with regard to the field conditions and the Standards requirements. New organizational forms have been introduced to work out the entire range of activities, from drilling to pre-production of each specific well, which allowed, jointly with the Contractor, to run a virtual simulation and to implement the scheduled operations at the preparation stage, taking into account the existing experience of all subsidiaries: the scheduled well interventions, the analysis of possible risks at the preparation and implementation stages. Such comprehensive approach, as well as new organizational forms, virtual modeling and implementation of scheduled operations resulted in the following: accident-free execution of scheduled operations, strict schedule compliance, reduced time costs, new technical and technological solutions.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122369175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Building of Effective Control and Management System for Injection Horizontal Wells During Waterflooding","authors":"R. R. Galeev, R. Rybakov, A. Yakovlev, Ilya Kayeshkov, S. Simakov, I. Fayzullin, A. Sagirov, R. Feoktistov, A. Suleymanov","doi":"10.2118/191577-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191577-18RPTC-MS","url":null,"abstract":"\u0000 The main uncertainties in the field development with the use of multiple-fractured horizontal wells (MFHW) in waterflooding are the inflow/injection profile along the horizontal wellbore, the number of working hydraulic fracturing ports, the dynamics of the productivity factor, the presence of the self-induced fracturing effect. All these factors affect the sweep efficiency and oil recovery factor. To remove uncertainties and increase the efficiency of waterflooding, a systematic approach to the control and management of the MFHW is required.\u0000 Implementation of this approach is an important direction of technological development of Gazprom Neft PJSC. The creation of a system for monitoring and managing the MFHW is based on the search, sampling, analysis of efficiency and selection of control technologies (geophysical studies for removal of uncertainties) and management technologies (well interventions for improvement of operational efficiency of MFHW).\u0000 One of the most promising technologies for monitoring the MFHW is long-term monitoring of downhole parameters (temperature and noise) with fiber-optic systems (FOS). Gazprom Neft PJSC has a positive expirience in this area, which includes the use of the FOS of various configurations, design and interpretation of the results of this type of research. Therefore, the main issue of using FOS in MFHW is the delivery of optical fiber to the horizontal part of the well with the possibility of further carrying out the well interventions without dismantling the FOS. The paper describes the results of testing a unique method of delivery of fiber-optic cable in the MFHW using coiled tubing and hydraulic anchor at the field in the Orenburg region.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122370952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}