SPWLA 61st Annual Online Symposium Transactions最新文献

{"title":"THE VALUE OF DATA INTEGRATION IN A COMPLEX WELL SCENARIO: A CASE STUDY FROM THE WEST NETHERLANDS","authors":"A. Kohli, E. Fokkema, O. Kelder, Zulkifli Ahmad, Daniel E. Sprague, C. Cavalleri","doi":"10.30632/spwla-5061","DOIUrl":"https://doi.org/10.30632/spwla-5061","url":null,"abstract":"","PeriodicalId":285200,"journal":{"name":"SPWLA 61st Annual Online Symposium Transactions","volume":"580 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116540920","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":"DELINEATING THE GEOTHERMAL STRUCTURE AND FLOW PROPERTIES IN A SUB- HORIZONTAL WELL WITH THE USE OF WIRELINE AND LWD DATA IN A MULTIPHYSICS APPROACH","authors":"E. Wielemaker, C. Cavalleri, L. Dahlhaus, Alejandra Reynaldos, G. Sosio, P. Ungemach, M. Antics, M. Davaux","doi":"10.30632/spwla-5065","DOIUrl":"https://doi.org/10.30632/spwla-5065","url":null,"abstract":"Geothermal projects are rapidly developing in Continental Europe to provide an alternative energy source. These projects typically involve a doublet of a producer and injector well, which are typically vertical wells drilled with minimal measurement technology. We discuss how advanced wireline measurements guided the decision making for completion strategy in a subhorizontal geothermal well in the suburbs of Paris, France, which at the time was a world premiere in geothermal well design. In addition, we will describe how these measurements aided understanding of the overall structural model. The project provided a 150% increase in geothermal productive/injective capacity vs. previous conventional approaches. The study was conducted in the Cachan project in the Paris Basin, which was developed to provide a city on the outskirts of Paris with geothermal heat. The project targets thin porous oolitic layers within a dolomite formation as an excellent geothermal target to produce from. The well was geosteered with Logging While Drilling (LWD) density images after which wireline Nuclear Magnetic Resonance (NMR) and dipole sonic measurement tools were operationally efficiently conveyed on tractor throughout the long horizontal drain section. A multi-physics approach combining the density images, high resolution magnetic resonance poro-permeability data and oriented sonic measurements was applied to study the homogeneity of the layers along the well and determine the flow properties and possible compaction effects. NMR logs were primarily used to assess the porosity and permeability variations of the oolitic reservoirs with high resolution, highlighting the intervals with the highest fluid movability through the thin layers. NMR measurements were also applied to describe the pore system and assess the fluid movability through the thin layers. NMR carbonate porosity partitioning analysis was used to classify rock type with similar reservoir quality and assist with the definition of rock properties cutoffs for development strategy. In addition to typical applications for rock mechanics and petrophysics, the sonic data in combination with the azimuthal density helped explore any possible effect of the proximity of the adjacent layers within the thin oolitic section (in the order of 1 meter). By combining measurements from different spacings and taking the opportunity to analyze the non-standard individual azimuths from the sonic technology, a more detailed structural model was obtained after integration with the density image. This enabled understanding whether permeability variations are truly related to layer variations or a result of the measurements sensing properties of an adjacent layer and defining the heterogeneity of the oolites. Bio: Erik Wielemaker is a Principal Acoustic Domain Champion for the Eastern Hemisphere with the Wireline product line of Schlumberger. Based in The Hague. He holds an MSc in Geophysics from the University of Utrecht, The ","PeriodicalId":285200,"journal":{"name":"SPWLA 61st Annual Online Symposium Transactions","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133351141","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":"CALIBRATED FORMATION WATER RESISTIVITY SENSOR","authors":"T. Pfeiffer, M. Sarili, Cong Wang, Koichi Naito, Y. Morikami, Hua Chen, Hamed Shabibi, D. Frese","doi":"10.4043/30841-ms","DOIUrl":"https://doi.org/10.4043/30841-ms","url":null,"abstract":"\u0000 For every barrel of oil, about three to four barrels of water is produced. Water is part of every operation in upstream oil and gas: we produce it, we process it, we inject it. It affects our reserves because it may drive or sweep the oil out of the pores. It is a source of corrosion and scaling in pipe and in the reservoir. Measuring formation water resistivity (Rw) goes beyond using it as the basis of petrophysical well log interpretation. It is the key to telling different waters apart for taking the most representative samples.\u0000 We introduce a calibrated induction-based water resistivity measurement sensor, which is configured to accurately measure Rw in the flowline of a formation testing tool. The induction-based operating principle of the sensor eliminates the use of electrodes and the associated fouling of the measurement due to coating or accumulation of particles on the electrodes. Instead, the sensor induces an electric current through a nonconductive, neutrally wetting flowline tube that is proportional to the conductivity of the fluid column within the tube. The resulting current at the receiver coil is then converted into resistivity.\u0000 A case study presents data from a focused water-sampling station in a transition zone in a well drilled with water-based mud (WBM). The resistivity contrast between the mud filtrate and the formation water is low and mobile oil mixes with the formation water and mud filtrate. Despite these difficult conditions, the downhole measurement clearly shows the cleanup progress in real time and compares well with the surface measurements of the water samples. The ability to differentiate formation water from WBM filtrate with low resistivity contrast in the presence of oil places the station depth in the transition zone and enables accurate interpretation of contacts, saturation, and ultimately hydrocarbon in place.\u0000 The sensor package is suitable for use up to 200-degC temperature and 35,000-psi pressure. The sensor can measure a wide range of resistivity, from 0.01 to 65 ohm.m. Measurements performed on known fluids prove its high accuracy of ±5% or less for resistivity below 10 ohm.m at a resolution of 0.001 ohm.m. The design eliminates any dead volume and all flowline fluid passes through the sensor. The sensor tube is smoothly flushable for fast dynamic response in multiphase slug flow.\u0000 This paper also discusses optimal sensor placement and operational techniques to achieve best results in multiphase flow environments.\u0000 The accuracy and resolution of the resistivity measurement enables direct comparison of guard and sample flowlines during focused sampling and provides differentiation even when the contrast between filtrate and formation water is low. The results can serve as a direct Rw measurement, for example in an exploration scenario, as successfully shown in another PDO trial, or can be compared to other sources of Rw measurement or used to improve the accuracy of alternatives to the Archie equa","PeriodicalId":285200,"journal":{"name":"SPWLA 61st Annual Online Symposium Transactions","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116844559","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}