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Sauro Valley
Operational Monitoring Procedures Based on Sentinel-1 SAR Data Processing to Support Oil Production Activities
Graci, Giancarlo (TOTAL E&P Italia s.p.a.) | Nutricato, Raffaele (Geophysical Applications Processing (GAP) s.r.l.) | Nitti, Davide (Geophysical Applications Processing (GAP) s.r.l.) | Massimi, Vincenzo (Planetek Italia s.r.l.) | Samarelli, Sergio (Planetek Italia s.r.l.) | Wasowski, Janusz (CNR-IRPI: Istituto di Ricerca per la Protezione Idrogeologica (IRPI))
Abstract This work provides a detailed description of an operational service based on the processing of Sentinel-1 satellite SAR (Synthetic Aperture Radar) data aimed at monitoring the ground surface displacements in the Sauro valley, southern Italy, where oil production activities are in progress. The operational character of the service is ensured by (i) the maturity of the SAR data processing methodology used, which is based on Multi Temporal Interferometry (MTInSAR), and (ii) the availability of the Sentinel-1 SAR images acquired in a systematic way (1 image every 6 days) over the area of study. The procedures and tools here presented are of general applicability and can be used in other geographic regions. Furthermore, the proposed approach allows the integration of in-situ data based on GNSS measurements and on the use of corner reflectors thus enabling also the cross-validation of the ground surface displacement maps produced by the service. In particular, the complementary data from GNSS permanent stations installed at corner reflector sites demonstrated a very good agreement between GNSS and SAR measurements. This confirms the high potential of SAR interferometry in providing reliable wide-area displacement maps. More specifically, the application of these tools and procedures to the Tempa Rossa oilfield in the Sauro valley, Basilicata, allowed to deploy a modern and efficient monitoring process, complying with the Guidelines For Monitoring Seismicity, Ground Deformation And Pore Pressure In Subsurface Industrial Activities which recommend, among other things, the use of satellite methods to detect ground deformations using interferometric technologies with an accuracy of some millimeters/year. Introduction The objectives of a monitoring system are often manifold. In industrial projects, such as Tempa Rossa oil field, an efficient monitoring system is not just a matter of regulatory compliance and of fulfilling requirements [MISE, 2014], but it also increases the overall safety of the project. Space-based Multi Temporal SAR Interferometry (MTInSAR) has been developed in late 1990s - early 2000s and its potential has been demonstrated for both mapping and monitoring the movements of natural and anthropogenic features [Wasowski, 2018]. The technique has reached a high maturity level and robustness, as well as a millimeter accuracy in the measurements of ground surface displacements.
- Europe > Italy > Basilicata > Sauro Valley > Tempa d’Emma Concession > Laurenzana Permit > Tempa Rossa Field > Apulian Formation (0.99)
- Europe > Italy > Basilicata > Sauro Valley > Tempa d’Emma Concession > Gorgoglione Concession > Tempa Rossa Field > Apulian Formation (0.99)
- Europe > Italy > Basilicata > Sauro Valley > Perticara Concession > Laurenzana Permit > Tempa Rossa Field > Apulian Formation (0.99)
- (3 more...)
Abstract The Tempa Rossa oil field is located in the heart of Basilicata, an agricultural region in the south of Italy, which inhabitants belong to a rural culture set in its ways. The project area lies in the middle of three protected areas (national and regional parks), with consequent challenges in terms of biodiversity conservation and environment protection. To ensure acceptability of Tempa Rossa project, Total E&P Italia - as a responsible operator of an O&G project - considered that structuring the internal governance of all processes impacting the stakeholders and the territory is a key success factor. More specifically, Total E&P Italia considered necessary to implement an internal process for updating and sharing the activities in real time, in order to prevent and manage problems linked to the social and environmental impact on different stakeholders. To achieve such objectives, Total E&P Italia set up two internal committees. The Acceptability Technical Group (ATG) ensures that Total E&P Italia guidelines and policies are applied in operational activities and identifies and anticipates potential environmental/social issues in such activities. This is the forum for the representatives of the different Total E&P Italia departments, to discuss and find concrete solutions to the identified problems in order to avoid/reduce "non technical risks" (i.e. suspension of operations, lawsuits, etc.). The mitigation measures plan set in place by the ATG is submitted to the second committee (ASC) for validation. The ASC (Acceptability Steering Committee) is the main internal body in charge of decision-making on environmental/social matters, where strategies are defined and decisions on actions/measures proposed by ATG are taken.
- Europe > Italy > Basilicata > Sauro Valley > Tempa d’Emma Concession > Laurenzana Permit > Tempa Rossa Field > Apulian Formation (0.99)
- Europe > Italy > Basilicata > Sauro Valley > Tempa d’Emma Concession > Gorgoglione Concession > Tempa Rossa Field > Apulian Formation (0.99)
- Europe > Italy > Basilicata > Sauro Valley > Perticara Concession > Laurenzana Permit > Tempa Rossa Field > Apulian Formation (0.99)
- (4 more...)
ABSTRACT: The Tempa Rossa Oil Field is located in the Gorgoglione Concession (TOTAL op. 50%, SHELL 25%, EXXONMOBIL 25%) in the Basilicata Region (Italy). It is part of the Southern Apennines thrust belt complex environment. Discovered in 1989, five Exploration / Appraisal wells were drilled in the nineties by various operators. After the Field Unitisation in 1999, another 10 years period was necessary to generate an appropriate Development Plan, negotiate between the Joint Venture and the Authorities the terms of the conditions attached to the Production and obtain the relevant authorizations and Permits. The Tempa Rossa Project is about to be launched. The main challenge is now to develop the Field and, at the same time to still appraise it, as with the existing wells only about 10% of the field is known. The current Development Plan consists, in a first phase, in producing six wells (the 5 existing ones and a new drilled one) in natural depletion with activation by ESP (Boost mode), immediately followed by the drilling of two additional wells in new compartments. First oil is expected in 2012 with an oil evacuation (50,000 bpd) towards the Taranto Refinery through a connection to the Val D'Agri pipeline. The Reservoir, the fractured Apulian carbonate Platform (Cretaceous to early Tertiary) is characterized by a high structural internal complexity. None of the five existing wells has reached an Oil-Water Contact (OWC). The Oil chemical and physical characteristics, of heavy type, vary with depth: API is from 24 to 11 from Top (3000 m SS) to ODT (5175 m SS). Taking into account the unusual complexity of some of the Tempa Rossa Subsurface features (Structural context, sedimentology, petrophysics, fluid nature and variations) many data acquisitions and integrated multidisciplinary studies are still necessary to reduce static and dynamic uncertainties, to comfort the concepts and to improve the understanding of the Production mechanisms. A new operational phase will start in 2009 by the drilling of a deep new well called Gorgoglione-2, with a planned Total Depth of 7000 m. Its objectives are not only to become a future producer but also to appraise the Eastern part of the Field by acquiring geological and reservoir information, and reduce the overall uncertainties. As a result, new models will be performed which will allow better evaluations of Reserves and upsides and how to optimize the Field monitoring and future drilling operations to make the Development of this challenging Field a real success story
- Phanerozoic > Cenozoic > Neogene (0.96)
- Phanerozoic > Mesozoic > Cretaceous (0.91)
- Geology > Structural Geology > Tectonics (1.00)
- Geology > Sedimentary Geology (1.00)
- Geology > Rock Type > Sedimentary Rock > Carbonate Rock (0.69)
- Europe > Italy > Basilicata > Sauro Valley > Tempa d’Emma Concession > Laurenzana Permit > Tempa Rossa Field > Apulian Formation (0.99)
- Europe > Italy > Basilicata > Sauro Valley > Tempa d’Emma Concession > Gorgoglione Concession > Tempa Rossa Field > Apulian Formation (0.99)
- Europe > Italy > Basilicata > Sauro Valley > Perticara Concession > Laurenzana Permit > Tempa Rossa Field > Apulian Formation (0.99)
- (4 more...)
- Reservoir Description and Dynamics > Reservoir Characterization > Sedimentology (0.48)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (0.47)
- Reservoir Description and Dynamics > Reservoir Characterization > Seismic processing and interpretation (0.46)
- (3 more...)
Introduction Summary For the past several years, Total has been developing different applications of microseismic monitoring in the E&P domain, such as structural definition for exploration, reservoir fracturation (frac) monitoring, gas or steam injection monitoring and field production monitoring. This procedure is mainly based on feasibility studies that allow the optimization of both acquisition layout/parameters and estimated accuracy of the results. A structurally-focused acquisition is planned on the Tempa Rossa field (Italy) for Q2 2007 and gas injection tests in the Middle East and South America are also planned for 2007. The application of microseismic analysis is presently concentrated in the domain of frac monitoring, but it can also be useful for field development. This paper describes different approaches that Total is testing in order to appreciate how the analysis of microseismic events can benefit an E&P petroleum company. Field monitoring case 1 : gas injection monitoring Exploration purposes It can be difficult to imagine what the analysis of microseismic events can offer for exploration purposes, whereas 2D or 3D reflection seismic is supposed to give a precise and reliable image of the subsurface. However, while in complex areas as thrustbelts the acquisition of conventional 3D seismic can be prohibitively difficult and expensive, the abundance of natural seismic events makes microseismic studies an attractive alternative. For the past 3 years, Total has been investigating the possibility of performing a passive seismic acquisition on the Tempa Rossa field (Figure 1) in southern Italy (Apennines) in order to refine the structural definition of the heavy oil field and knowledge of its oil content. The overall objective of the study is a better definition of the structural scheme and eventual delineation of different compartments by means of seismic event locations to be indicators of main faults expression in this tectonic complex area. Local seismicity up to magnitude -1 can be used for passive tomographic studies using P- and S-wave travel time phases. These natural microearthquakes recorded over several months by a mobile network of surface seismometers are used to provide a detailed 3D velocity and Vp/Vs image of the upper few km of the crust. This technique involves simultaneously inverting for microearthquake locations and making adjustments to the initial velocity model. Various feasibility studies were carried out in order to optimize the acquisition geometry and parameters. Acquisition is planned to start Q2 2007 with a duration of about 10 months if the pilot phase is successful. Results are expected mid-2008. Different field monitoring approaches were tested specifically for injection purposes (steam, gas or water). The first step is to perform a microseismic feasibility study in order to define optimized layout and expected results. In the case of a producing carbonate reservoir (Arab-D) in offshore Middle East (Figure 2) the microseismic monitoring objectives are to better control the injection of gas and to evaluate the role of the faults and other reservoir heterogeneities during stimulation. As gas injection creates perturbations in pore pressure as aresult of shear stress failure along zones of weakness.
- Africa (0.90)
- Europe > Italy > Basilicata > Sauro Valley (0.45)
- Geology > Geological Subdiscipline > Geomechanics (0.69)
- Geology > Structural Geology > Tectonics (0.54)
- Geology > Petroleum Play Type > Unconventional Play > Heavy Oil Play (0.54)
- Europe > Italy > Basilicata > Sauro Valley > Tempa d’Emma Concession > Laurenzana Permit > Tempa Rossa Field > Apulian Formation (0.99)
- Europe > Italy > Basilicata > Sauro Valley > Tempa d’Emma Concession > Gorgoglione Concession > Tempa Rossa Field > Apulian Formation (0.99)
- Europe > Italy > Basilicata > Sauro Valley > Perticara Concession > Laurenzana Permit > Tempa Rossa Field > Apulian Formation (0.99)
- (3 more...)