Day 2 Tue, October 16, 2018最新文献

{"title":"The Combination of Ridge and Conical Elements is a New Approach for Drilling Out Hard Carbonates and Sandstones Without Drop in ROP","authors":"A. Lomov, Biju James, Galymzhan Konysbekuly, D. Gumich, R. Rasulov","doi":"10.2118/191522-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191522-18RPTC-MS","url":null,"abstract":"\u0000 Designing and developing competitive tools for use in the oil and gas industry to meet the high-demand market requires years of experience and a high-level knowledge base. In today’s drilling environment, innovations in bit technologies play an increasingly important role to improve overall drilling performance and reduce drilling time. Cylindrical cutters had their own limitations and restricted the drilling industry from advancing the operations performance to the next level. 3D-shaped cutters were developed to provide maximum drilling efficiency in the most challenging applications by mitigating cutting structure damage and improving its technical limits. The invention of the 3D polycrystalline diamond cutter (PDC) is helping operators to drill wells faster by improving rate of penetration (ROP) and reducing in-out trips.\u0000 The combination of ridged diamond element (RDE) and conical diamond element (CDE) on bits is a new method for drilling formations. These bits improve drilling ROP by maximizing the shape of the PDC cutters. This combination also improves cutter durability, which in turn, enhances bit performance and drilling efficiency. Bits equipped with these 3D cutters require less mechanical specific energy during drilling compared with bits having conventional cylindrical cutters, which helps to reduce shock and vibrations and weight on bit required to drill hard formations.\u0000 Field data have proved, beyond any doubt, the benefits from using the combination of 3D PDC cutters in drilling hard formations. These cutters, depending on the shape, are able to improve ROP and durability, and by placing them in the right position on the bit, can improve the overall durability of the bit.\u0000 Multiple field tests were conducted in various applications with customers in Russia. The results clearly showed that the combination of these unique 3D cutters helped operators achieve a step change in performance by improving ROP and depth drilled. In some cases, operators were able to drill an entire section using bits equipped with 3D cutter combinations, whereas traditionally more than one bit was used to complete the section. This paper will present the advantages provided by 3D cutters and by implementing a combination of CDE and RDE 3D elements in challenging applications in Russia, in addition to performance benchmarks achieved using this unique combination of 3D cutter combinations.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"150 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":"132516096","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":"High-Performance Inhibitive Water-Base Fluid System for Drilling Challenging Wells","authors":"D. Voitenko, S. Ignatyev","doi":"10.2118/191510-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191510-18RPTC-MS","url":null,"abstract":"\u0000 This article addresses the general results of using a high-performance inhibitive water-base fluid system for drilling horizontal extended reach wells (ERD) and two-casing wells on a field in West Siberia, Russia. It also reveals potentialities for drilling even more challenging wells, as well as prospects for future projects where drilling fluid systems of this type can be used.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"22 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":"125141833","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":"The First Experience of Formate Based Drilling Fluids Application in Russia","authors":"Peter Leonidovich Ryabtsev, Anton Yuryevich Khomutov, A. Korolev","doi":"10.2118/191503-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191503-18RPTC-MS","url":null,"abstract":"\u0000 Notwithstanding significant advantages of the oil-base mud systems, their application inherent in a number of disadvantages that have been primarily attributable to environmental restrictions. In 2017 AKROS LLC and GAZPROMNEFT ran full-scale field-testing of potassium and sodium formate mud systems enabling them to analyze the performance of such systems and define the key application features. Conclusions on the application features of these systems and their perspectives in Russia are based on the results of the work performed.\u0000 To implement potassium and sodium formate drilling fluids in GAZPROMNEFT fields, the full-scale laboratory testing was performed. The outcomes enabled the identification of fluid formulations for field applications and procedures for the maintainance of mud properties when drilling.\u0000 Two intervals on «Gazpromneft-Khantos»' LLCs Yuzhno-Priobskoye Field and three intervals on\u0000 «Gazprom Neft Shelf» LLC's Prirazlomnoye Field were drilled with potassium formate-base formulations.\u0000 Field testing proved the high efficiency of potassium formate mud systems allowing them to: –achieve high drilling performance indicators;–gain experience in horizontal well drilling without lubricating additives demonstrating loads and torques similar to or lower than values observed in mud systems treated with lubricants;–develop the procedure for interval treatment of a high-density drilling fluid;–confirm the possibility of achieving a high density up to 1.41 g/cm3 without barite;–implement the technology ensuring mitigation of environmental risks connected with drilling fluids;–drill horizontal section and production casing intervals using one type of drilling fluid instead of two, facilitating reduced waste and prepared volumes.\u0000 The potassium formate mud system proved to be efficient and has impressive perspectives in Russia as an alternative to oil-base drilling fluids, particularly for high formation pressure drilling. Based on field application results, practical application procedures and optimum recommendations for controlling mud properties were developed. Comparative tests for inhibition effectiveness, reducing friction factor, achieving high drilling performance were conducted.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"11 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":"128473773","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":"Hydrocarbon Detection Method and Application Based on Two-Wide and One-High Seismic Technique","authors":"Wang Zhen, Zheng Jun-zhang, Wang Yankun, Yin Jiquan, Luo Man, L. Shuang","doi":"10.2118/191686-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191686-18RPTC-MS","url":null,"abstract":"\u0000 The \"Two-Wide and One-High\" (wide-band, wide azimuth and high-density) Seismic Technique provided high-quality seismic data for more accurately identify the lithologic reservoirs, with low frequency information and broadband data being beneficial to the petroleum detection in the reservoirs. Hydrocarbon reservoir is a typical two-phase (solid and fluid phases) media. The seismic wave can display the characetristics of obvious low-frequency resonance and high-frequency attenuation in the seismic record after propagating through the two-phase media. Based on the theory and the \"Two-Wide and One-High\" Seismic data, the hydrocarbon detection is carried out in AMG block's two carboniferous sets of main reservoirs in the eastern Precaspian Basin. Three methods are useded to analyze variation in the low-frequency and high-frequency after the seismic wave propagating through the exploration target strata, such as area difference method, time-frequency method of three primary colors method, instantaneous bandwidth method. The petroleum detection result accords well with the drilling testing data in the area, which means that this detection method based on the \"Two-Wide and One-High\" Seismic data could lower the exploration drilling risk and provides the advantageous basis for well location deployment of hydrocarbon reservoir exploration in the area.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"34 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":"127001937","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":"Organizational Model of Management Seismic Survey Projects in PJSC Gazprom Neft","authors":"Valikhan Dakirov, D. Litvichenko, V. Zhukov","doi":"10.2118/191687-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191687-18RPTC-MS","url":null,"abstract":"\u0000 \"The era of easy oil comes to the end\" – this phrase can be heard with increasing frequency today, and \"hard-to-recover\" reserves become the target of development. And presently, the seismic community is facing the challenge to survey complex geological features and improve the level of detail and reliability of the models: ➢A vast number of fields are near-depleted:The share of complex lithology deposits is growing;Have to drill into edge zones;Find hidden layers;➢New assets with complex geology:Geology forecasting of complex reservoirs;Forecasting the fracturing and anisotropy.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"8 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":"125574717","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":"Nanoseismological Monitoring of Hydraulic Fracturing","authors":"I. Chebotareva, A. Dmitrievsky, N. Eremin","doi":"10.2118/191688-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191688-18RPTC-MS","url":null,"abstract":"\u0000 The nanoseismic monitoring combines the methods focused on the weaker seismic sources than the micro-earthquakes. The localization of the latter is carried out on seismic records using hypocentry methods with the preliminary picaping of the arrival times of seismic phases. An emission seismic tomography allows to conduct the localization of extremely weak noise-like endogenous sources, signals from which are completely buried in the noise on single records. If nanomaterials often exhibit properties that are significantly different from the behavior of similar materials in a massive state, then nanoscale monitoring makes it possible to investigate the fine energetics of geophysical processes that is substantially different from the relatively higher energy manifestations. The nanoseismological methods allow not only to localize the seismic events associated with the rock fragmentation, but also to monitor the processes of the preparation of micro-events and the processes of the relaxation of the stressed state of the environment after them. These methods also allow us to study the slow changes in the stress-strain state of the geological environment, under which the dissipation occurs in the form of the noise-like continuous emission radiation and is not accompanied by micro-earthquakes. The emission seismic tomography allows to extract information about the structure of the rock medium and the processes occurring in it from the spatially coherent seismic emission signals, which are a weak additive component of the seismic noise. The activation of sources of seismic emission within the geo-environment occurs with various kinds of the external natural and technogenic impacts. An important experimental fact of our research studies is that the configuration of the active emission clusters in a large volume of the rock medium, up to several kilometers, changes significantly with the local technogenic impact on the natural rock mass during the hydraulic fracturing and is not uniform in different frequency ranges. According to the records of the seismic background prior to the hydraulic fracturing, the stationary emission zones through which the dissipation of the background effects (tidal, tectonic, technogenic) occurs are \"highlighted\". As the pressure increases during the injection of the fracturing working fluid, the rock mass adapts to the change in the energy flux by increasing the number of emitters and changing the position of the clusters of emission sources. The change in the stress-strain state of the rock media leads to the \"illumination\" of the new emission sources not previously detected in the background state. A sharp change in the spatial distribution of the emission sources can be considered as a bifurcation with the emergence of a new spatio-temporal dissipative radiating structure. A day after the hydraulic fracturing process is over, the rock media returns to the background distribution of the sources.\u0000 The experimental results sh","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":"114632194","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 Chemical Compositions Injection Combined with Cyclic-Steam Stimulation","authors":"I. Kuvshinov, V. Kuvshinov, L. Altunina","doi":"10.2118/191490-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191490-18RPTC-MS","url":null,"abstract":"\u0000 The paper presents the analysis of cyclic steam stimulation (CSS) application results for producing wells on Permian-Carboniferous deposits of Usinskoye oilfield of high-viscosity oil, the Republic of Komi, Russia. The application of thermotropic chemical compositions for enhanced oil recovery combined with CSS is discussed. Data on treatment of more than 170 cyclic-stean wells for 2017, as well as statistical data on cyclic steam stimulation for 2014-2017 are given. Among the wells considered are both wells treated with steam only, and in combination with chemical compositions of two types, oil-displacing and flow-diverting. The compositions used are thermotropic, using the energy of the injected fluid to activate the necessary chemical reactions, such as gelling or the formation of an alkaline buffer system. Also, the effect of CSS for wells where this treatment is applied for the first time, with wells with multiple CSS (from two to ten cycles), is compared. Experimental curves of efficiency distribution are obtained, expressed in the increase in oil production rate after treatment, for different well groups.\u0000 The analysis of the efficiency of the CSS on a large data set was carried out, the asymmetries in the efficiency distribution of the wells were revealed, where the CSS was used for the first time. The first CSS cycle, especially when the well is put into operation from inactivity or after drilling, is most effective, the average flow rate after treatment is 24.0 tons/day, with multiple treatments the efficiency is significantly reduced, a decrease to 5.5 tons/day is observed.\u0000 The influence of chemical compositions of various functional purposes on the efficiency of cyclic steam stimulation has been studied. With repeated CSS, the use of the oil-displacing composition is efficient and reasonable, since one of the main declared functions of the composition is precisely the extra washing of the residual oil. The average yield for repeated treatments with a composition is 10.9 tons per day. The use of the gel-forming (flow-diverting) composition with the CSS reduces the water cut of the product by 30-40%, and stabilizes the average result of the treatments, both at low and high efficiencies, so that application of such a composition is undesirable in wells with a high oil production rate before the CSS, but is valid for highly watered wells.\u0000 Based on the results of the analysis, it was concluded that for the new wells, the first cycle of CSS is most effective, and the use of chemical compositions is not necessary, but for subsequent cycles, it is recommended to use chemical compositions that will provide afterwashing of residual oil and reduced water cut. For old wells, where no CSS was previously used, it is necessary to evaluate the expediency of using chemical compositions in the first cycles based on the dynamics of the well and the initial water cut.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"22 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":"126671029","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":"Evolution of Well Logging Technologies in the Development of Deposits on the Caspian Shelf","authors":"S. Shtun, M. Golenkin, M. Rakitin, D. Shtepin, A. Mityagin, A. Cheprasov, R. Golubtsov, V. Kuzakov","doi":"10.2118/191692-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191692-18RPTC-MS","url":null,"abstract":"\u0000 It is difficult to imagine modern exploitation of deposits without drilling horizontal wells. The choice of the direction of drilling of horizontal trunks depends on the study of the deposit, which is based on seismic and exploration data. The drilling conditions onshore is somewhat easier than in the sea, as there are a sufficient number of vertical and horizontal wells on the ground that carry enough information to select the optimal direction of the horizontal production well. There is a completely different situation with drilling offshore production wells. As a rule, there are not enough vertical exploratory wells in the fields located at sea, which make it difficult to develop and operate offshore deposits.\u0000 Complex drilling conditions require a deeper and more comprehensive technological approach to the well planning process. Modern technological solutions allow solving a wide range of tasks for obtaining geological information about the field, reducing risks, and, as a result, reducing the time of drilling and completion of wells. In this paper, we describe the range of geological and technological problems that were solved due to the introduction of new technologies for well logging.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"91 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":"125488910","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":"Fully Coupled Geomechanics Approach to Determine Critical Wellbore Intervals","authors":"V. Shelkov, K. Bogachev, E. Piskovskiy, George Piatsky","doi":"10.2118/191631-18rptc-ms","DOIUrl":"https://doi.org/10.2118/191631-18rptc-ms","url":null,"abstract":"\u0000 A method to locate critical wellbore intervals during oilfield development is proposed in this article. A variant of fully coupled geomechanics approach is used. Geomechanical 3D modeling is performed on the same mesh that is used for reservoir simulation. The proposed algorithm uses Mohr-Coulomb criterion to locate critical wellbore intervals.","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"655 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":"133061777","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":"Foam Cementing in the Volga-Ural Region: Case Study","authors":"A. Fomenkov, Ilya Pinigin, V. Zyryanov, A. Fedyanin","doi":"10.2118/191507-18RPTC-MS","DOIUrl":"https://doi.org/10.2118/191507-18RPTC-MS","url":null,"abstract":"\u0000 Most wells drilled in 2015–2017 in the Volga-Ural Region of Russia experienced serious downhole problems related to mud losses, which account for a substantial share in total non-productive time (NPT). With conventional methods such as cement plugs, etc. used to solve the lost circulation problem, it takes on average 4 to 6 days per well, or 6 to 10% of the total rig time. In some cases, however, the losses are so heavy that there is no mud return to surface at all, and it may take up to 30 days (about 50% of the rig time) to stop these disastrous losses. Besides, there may be several thief zones at different depths with different loss initiation points. Conventional methods of lost circulation control generally fail.\u0000 In many cases, conventional cement plugs used to stop mud losses are inadequate to meet such challenges. This paper describes the application of special cryogenic equipment and chemicals to offer oil and gas well operators an alternative solution based on foaming base cement slurries, spacers, and drill muds with inert gas (usually nitrogen) over a wide range of densities.\u0000 When cementing is used for controlling lost circulation, computer-based simulation is essential to determine hydraulic model parameters. A new proprietary cement service performs high-precision foam cement calculations based on actual well data. The key is to select the correct concentration of nitrogen in foam water spacer and foamed cement to reduce hydrostatic pressure below the point at which losses are initiated in a weak horizon (formation). This special foam cementing equipment is capable of controlling nitrogen concentration automatically and injecting nitrogen into base cement with the foamer to maintain the design density of foamed cement. Cement and service water are foamed under high pressure on the surface in a high-pressure pipeline loop system. Automatic foaming means that three main units are simultaneously in operation: a cementing unit, an N2 unit, and an automatic chemical injection skid. Foamed cement is pumped under pressure to drilling tools. Similarly, service water is foamed to produce foam water spacer with a density of 0.3 g/cm3 to 0.9 g/cm3, which is injected into the well before foamed cement. Foam water spacer is injected first in the thief zone followed by foamed cement. The high-viscosity foam water spacer prevents foamed cement from being washed away by formation fluid and reduces the flow of formation water in the thief zone. As a result, the linear velocity of foamed cement in the lost circulation horizon is reduced, which makes it possible for the cement to achieve the required consistency and isolate the weak formation in the near-wellbore area. Foam water spacer injected into the well lowers hydrostatic pressure and raises the static level of fluid in the well to the wellhead to help ensure returns to surface.\u0000 The new technology has proved to be the most efficient among other solutions used to mitigate or eliminate mud los","PeriodicalId":242965,"journal":{"name":"Day 2 Tue, October 16, 2018","volume":"18 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":"133321733","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}