Day 1 Tue, October 22, 2019最新文献

{"title":"Experience of Gas Wells Development in Complex Carbonate Reservoirs in Different Stages of Development","authors":"V. Volkov, A. Turapin, A. Ermilov, S. Vasyutkin, D. Fomin, A. Sorokina","doi":"10.2118/196915-ms","DOIUrl":"https://doi.org/10.2118/196915-ms","url":null,"abstract":"\u0000 This paper describes practical experience of perforating of producing horizons under conditions that are incompatible for perforating for geological reasons, as well as methods of killing and developing wells with ALRP.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132099710","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":"Numerical Modeling of Non-Equilibrium Phase Transitions in the Isothermal Compositional Hydrocarbon Flow Simulations","authors":"K. Bogachev, S. Zemtsov, S. Milyutin, I. Indrupskiy, O. Lobanova","doi":"10.2118/196871-ms","DOIUrl":"https://doi.org/10.2118/196871-ms","url":null,"abstract":"\u0000 The paper deals with the problem of numerical simulation of multiphase flow with non-equilibrium phase transitions in the development of hydrocarbon deposits. For the isothermal compositional flow model, a new method is proposed that takes into account the rate of thermodynamic equilibration.\u0000 A process is called non-equilibrium if its characteristic duration is equal to or greater than the characteristic time of external conditions changing. In the classical formulation of multiphase flow problems, it is believed that flow processes take place under thermodynamic equilibrium, that is, phase transitions can be considered instantaneous compared to the rate of change of the pressure and composition of the hydrocarbon mixture. In real oil and gas-condensate systems phase transitions proceed in forward and reverse directions with different rates. For example, the dissolution of gas is much slower than the liberation of gas from oil, and so non-equilibrium behavior can strongly influence the simulation results. The role of non-equilibrium behavior increases with the increase of the elementary volume of averaging, that is, with the growth of the mesh size of the dynamic flow model.\u0000 For black-oil models, there are extensions to the mathematical formulation that are often used in practice to describe non-equilibrium phase transitions. In most realizations of compositional models, the rate of establishing thermodynamic equilibrium is not taken into account. In some typical cases it may call into question the reliability of the simulation results.\u0000 Previously, an approach was proposed to extend the traditional compositional model to account for non-equilibrium thermodynamic processes occurring in the reservoir (Indrupskiy et al., 2017). In the non-equilibrium case, the condition of equality of chemical potentials of the components in the phases was replaced by the condition of relaxation of the difference of chemical potentials to zero as the system tends to the equilibrium state after changing the external parameters (pressure and bulk composition of the mixture). In this paper, an alternative approach is formulated in which it is proposed to limit the rate of change of the distribution ratios (K-values) of the components, so as to take into account the relaxation. The new method has a number of advantages: higher numerical efficiency and stability, the possibility of natural generalization to the thermal compositional model. At the same time, as for the method proposed in (Indrupskiy et al., 2017), it is necessary to change only the algorithms for calculating the vapor-liquid \"equilibrium\" (\"flash\"), while the flow equations do not change. It makes possible a relatively simple implementation in existing reservoir simulators.\u0000 The proposed method, as well as the method of (Indrupskiy et al., 2017), are implemented in the framework of a fully implicit three-phase three-dimensional compositional flow simulator. The results of real reservoir simulations a","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133293979","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":"Estimation of the Largest Russian Oil Field Development Efficiency Using the Combination of Hydrodynamic Modeling and Horizontal Well Production Logging Methods Using Markers","authors":"A. Gurianov, A. Katashov, K. Ovchinnikov, D. Gilev, V. Vasilyev","doi":"10.2118/196846-ms","DOIUrl":"https://doi.org/10.2118/196846-ms","url":null,"abstract":"\u0000 Increasing the pace of oil production to achieve profitability in projects has increased significantly with the transition to the active development of deposits with low-permeable reservoirs throughout the West Siberian oil and gas province. The key to increasing production rates for objects with degraded reservoir properties is to increase the technical and technological effectiveness of the applied solutions. The purpose of the article is to evaluate the project using data obtained by the new, innovative tracer-based methods and contemporary types of well completion in well testing to increase the drainage area, flow rate and improve the operational parameters of the pressure maintenance system.\u0000 Greater reservoir filtration areas in reservoirs with abnormally low permeability is achieved by using horizontal drilling and fracturing. Modern modeling tools allow for the consideration of uneven development of the horizontal shaft length. Conventional logging methods cannot provide detailed information during the operation of hydraulic fracturing stages, but marker-based methods present a proper production logging alternative, especially given their widespread development in recent years. Using the data of marker diagnostics, it is possible to adapt hydrodynamic models to specify the hydrocarbon production profiles.\u0000 The present article brings to your attention sector hydrodynamic model (HDM) calculations that take into account the uneven development of depleting reserves based on marker diagnostics data. A comparison was made with HDM under the assumption of a uniform inflow into horizontal well with MFrac. The model showed several levels of inflow variability obtained through statistical data on the marker production logging of 60 wells performed at various fields.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"56 26","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131603723","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":"Contactless Monitoring Systems for the Offshore Production Platforms","authors":"N. Eremin, L. Khusnutdinov, R. Yusipov","doi":"10.2118/196952-ms","DOIUrl":"https://doi.org/10.2118/196952-ms","url":null,"abstract":"\u0000 The report describes a contactless system for monitoring the technical condition of the production platforms. Technological binding of the caissons of offshore platforms requires the creation of a monitoring system. A monitoring system has been proposed to reduce the risk of operating production platforms with caissons. The complex of equipment for the monitoring system of the platform is described. The monitoring system is based on the use of the method of magnetic tomography.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123016507","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":"Field Experience of Integrating Distributed Thermal Anemometer Data Analysis into Production Log Interpretation Workflows","authors":"D. Miklashevskiy, R. Skochelyas, V. Shako, A. Egorov, Timur Solovev, Dzheikhun Soltanov","doi":"10.2118/196957-ms","DOIUrl":"https://doi.org/10.2118/196957-ms","url":null,"abstract":"\u0000 The objective of this article is to share development progress and recent field examples for a new interpretation workflow enabling full integration of distributed dynamic thermal anemometry (TA) measurement data with the traditional workflow for production logging (PL) data analysis. A major focus is on oil-water inflow profiling in relatively low-rate horizontal wells.\u0000 The dynamic azimuthally distributed thermal anemometry (ADTA) tool was recently field tested in several wells as a part of the PL assembly. The collected data sets and accumulated interpretation experience were used to develop a new workflow to make ADTA an intrinsic part of the data interpretation workflow. It includes a set of enhanced algorithms and software tools that provide automated calculation of the key parameters derived from TA data analysis along with traditional logs. The enhanced workflow is partially based on previously published laboratory experimental data and on utilization of collected field data interpretation experience.\u0000 The newly developed algorithms and software tools enabled proving that results of the distributed TA data analysis are fully consistent with other PL data sets provided that the wellbore conditions and procedures enable high-quality measurements and interpretation. For such cases we demonstrate that profiles of multiphase inflows and wellbore phase fractions derived from the distributed TA agree reasonably well with interpretation of the spinner data, the distributed (volumetric) water-cut meter, and other PL data. Meanwhile, in cases of more challenging downhole conditions when some of the traditional PL measurements become unreliable, the distributed TA data can still provide interpretable and valuable information on the zonal inflow profiling. We discuss the uncertainty level for both cases: when all major PL data sets are available with good quality along with TA and in more challenging conditions with just a few reliable data sets. We conclude that integration of distributed TA data for quantitative analysis in multiphase wells extends PL capabilities toward more challenging wellbore conditions than previously possible.\u0000 We discuss unique data sets of distributed TA data along with other PL data in the same wells and their quantitative analysis. The field examples of the fully integrated quantitative interpretation workflow are provided for horizontal wells with multiphase flow.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121087152","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":"Basic Principles of Gazprom Neft'S Modular Strategy for Field Infrastructure Development","authors":"A. Atnagulov, R. Panov, M. Khasanov, V. Batrashkin, D. Sugaipov, R. Ismagilov","doi":"10.2118/196819-MS","DOIUrl":"https://doi.org/10.2118/196819-MS","url":null,"abstract":"\u0000 Today, complex projects with a high degree of uncertainty relating to the reserves and geology increasingly dominate the portfolios of promising assets of oil producers. Successful development of such oil deposits requires novel approaches. One of these approaches suggests using modular technologies for field infrastructure development purposes that secure effective performance in the face of geological and production uncertainties. The article offers a summary of the basic principles of modular strategy that have been developed and deployed by Gazprom Neft.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134367271","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":"Tight Oil Development in RN-Yuganskneftegas","authors":"M. Shabalin, G. Khabibullin, E. Suleymanov, I. Rodionova, A. Sergeychev, D. Kulbaeva, Polina Volkova, A. Serbaeva","doi":"10.2118/196753-ms","DOIUrl":"https://doi.org/10.2118/196753-ms","url":null,"abstract":"\u0000 This paper presents a way of tight oil development using horizontal wells with hydraulic fracturing and modified field development patterns.\u0000 In order to minimize risks of drilling and optimize development decisions we apply systematic complex approach including well data analysis (incl. special tests), seismic data, reservoir surveillance results and geology modeling based on lithofacial analysis followed by simulation study. The feature of this approach is that this workflow is carried out on an ongoing basis and adjusted to the new incoming data. Using Achimov and Tyumen formation as examples characterized by high lithofacial heterogeneity and complexity of technological indicator forecasting we presented approaches to design the development strategy based on scientific and engineering support and pilot data.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132013652","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":"Mathematical Model for Describing the Growth of Mini-Fractures in a Fractured Medium","authors":"A. Bykov, A. Bychkov, Y. Nevmerzhitskiy, I. Zavialov, N. Zavialova, Salimgareevs Elmira, Olga Yemchenko","doi":"10.2118/196886-ms","DOIUrl":"https://doi.org/10.2118/196886-ms","url":null,"abstract":"The main feature of fractured porous reservoirs, such as carbonates, is the presence of cracks of all scales, from the micro level to the main cracks that can cross the whole field. In connection with this feature, and beacause of the influence of formation perturbations on the geometric parameters of cracks, the interpretation of minifrac is a difficult task, since leak-off depends in a complex way on pressure. In this regard, the actual task of building a mathematical and numerical model that could be able to take into account the many processes that affect the anomalous dynamics of the bottomhole pressure. As a resul, a physico-mathematical model, which describes the opening of pre-specified cracks in the three-dimensional case, as well as the generation of new cracks on the basis of the fracture criterion was constructed. Filtration in the matrix and the cracks on a small scale was considered in in obedience to the double porosity model – double permeability. The features of multiphase filtration of a power-law fluid were taken into account. The calculation of geomechanical equilibrium was carried out according to the model associated with the method of calculating frames and trusses.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125597965","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":"Micro-Displacement Mechanism of Divalent Cations Activated Polymer Flooding In A Complex Conglomerate","authors":"Rui Liu, W. Pu, A. Ushakova, Hao Ren, Dai‐jun Du, Q. Luo, Rui Gou, Huoxin Luan","doi":"10.2118/196774-ms","DOIUrl":"https://doi.org/10.2118/196774-ms","url":null,"abstract":"\u0000 The conglomerate reservoirs of south block Qidong, Xinjiang Oilfield, NW China are one of the largest conglomerate reservoirs worldwide and have employed polymer-based chemical flooding pilot tests since 2016. But the output is less than 10% due to the harsh divalent cations concentration and the complex fluids distribution in microscale. It is important to design a novel divalent cations resistant polymer and then to elucidate its micro-reserve displacement mechanism in a complex conglomerate. A novel core-shell like polymer (CSPAM) composes of nanosilica as the core and polyoxyethylene modified polymeric chains as the shell is synthesized via a facile method. The thickening performance of CSPAM activated by divalent cations is explained using advanced rheometer and scanning electron microscope. A visual conglomerate lamination model combined nuclear magnetic resonance online experiments are conducted to investigate the micro-unrecovered oil displacement mechanism of CSPAM flooding: the distribution of micro-remaining and micro-residual oil after the earlier waterflooding are quantified; latter, the reserve utilization and displacement behavior of CSPAM flooding on the pore space scale are characterized. Within the Ca2+/Mg2+ concentration of 12000 mg/L, the electrostatic bridging between Ca2+/Mg2+ and ethyoxyl groups of CSPAM induces an interlacing transient-network, which activates a tenfold increase of viscosity and of longest relaxation time compared to these of CSPAM solution without adding salt. The conglomerate rock shows a complex pore-and-throat structure, resulting in severe heterogeneity and rapid water cut. The oil recovery by the earlier waterflooding is approximately 35% of OOIP (original oil in place), and the cluster of remaining oil in a disconnected state and oil resident in blinds pores occupies a major proportion of unrecovered oil. Significant reduction of oil saturation is achieved by CSPAM solution at low concentration of 1000 mg/L in harsh brine. Approximately 28% of incremental oil recovery factor with cumulative oil recovery higher than 63% OOIP is achieved by 0.5 pore volume of CSPAM flooding and chase waterflooding. The reserve utilization of CSPAM is 23.1% for large pore spaces, 13.2% for intermediate pore spaces, 11.6% for confined pore spaces, and 5.67% for minimum pore spaces, respectively. This research constructs a novel water-soluble polymer CSPAM with divalent cations activating viscosification, and elucidates the micro-displacement mechanism of CSPAM through quantifying the remaining oil and residual oil distribution, and reserve utilization of CSPAM on the pore spaces scale. The results will provide the substance and technique supports for future application in harsh salinity and complex pore structure conglomerate reservoirs.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121309141","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":"Modeling Gelation Time of Organically Crosslinked Polyacrylamide Gel System for Conformance Control Applications","authors":"Amer Al-Anazi, Ziyad Al-Kaidar, Jinxun Wang","doi":"10.2118/196775-ms","DOIUrl":"https://doi.org/10.2118/196775-ms","url":null,"abstract":"\u0000 Gel-based conformance control has been successfully applied in both sandstone and carbonate reservoirs. However, deep conformance-control in high-temperature reservoirs is still a challenge due to fast gelation. Gelation time depends on several factors. Successful modeling of the different parameters’ effects on gelation time is invaluable for formulation optimization to realize sufficient gelation-time for deep-diversion. In this work, a laboratory study was conducted to investigate and model gelation-time for organically-crosslinked Polyacrylamide formulations.\u0000 Sulfonated polyacrylamides with different molecular weights were used. The solutions were organically crosslinked using a polyethylenemine (PEI). The effects of different factors including temperature, brine salinity, pH, and polymer and cross-linker concentrations on gelation time were investigated using bottle tests and rheological measurements. For bottle tests, the solutions are prepared and aged in an oven. The vials are then retrieved and visually examined for gelation before being returned to the oven. For rheological measurement, dedicated solutions are prepared in separate vials and aged in the oven. Each vial is then retrieved where the solutions viscous and elastic moduli are measured.\u0000 The results indicate that polyacrylamide/PEI gel exhibits good thermal stability and gelation time reaches up to two and a half days at 95°C. The gelation time decreases with increasing temperature, polymer molecular weight, and polymer and crosslinker concentrations. However, there were lower limits for the polymer and crosslinker concentrations below which gels were not observed. Brine salinity and pH showed a wide range of effects on gelation time. Gelation time slightly increases with increasing the solution salinity at a fixed pH of around 8.0. A mathematical model was developed based on the experimental results to capture the effects of the main parameters. The predictable equation of gelation time was constructed using multivariable regression method, and the model successfully predicts the gelation time of the conformance control system at a fixed pH value of around 8.0. The good agreement is illustrated by the R-square value being around 98%. Furthermore, the model shows that temperature posses the highest impact on gelation time followed by the crosslinker concentration and brine salinity.\u0000 The developed mathematical model can be used to predict the gelation time of a polyacrylamide-PEI gel system. In addition, it can be utilized to optimize a given gel design and further validate the applicability of a given polymer/crosslinker formulation for deep fluid diversion application.","PeriodicalId":143392,"journal":{"name":"Day 1 Tue, October 22, 2019","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121362118","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}