Asia Pacific Santos discovered gas with the Corvus-2 well in the Carnarvon Basin, offshore Western Australia. The well, located in permit WA-45-R, in which Santos has a 100% interest, reached a total depth of 3998 m. It intersected a gross interval of 638 m, one of the largest columns discovered across the North West Shelf. Wireline logging to date has confirmed 245 m of net hydrocarbon pay across the target reservoirs. Total SA and partners ExxonMobil and Oil Search have signed a gas agreement with the government of Papua New Guinea that defines the fiscal framework for the Papua LNG project in the country's Eastern Highlands. The plan involves construction of three 2.7-mtpa LNG trains on the existing PNG-LNG plant site at Caution Bay just west of Port Moresby. Total has 31.1% interest, ExxonMobil has 28.3% interest, and Oil Search has 17.7%.
Africa (Sub-Sahara) Kosmos Energy has made a significant deepwater gas discovery off Senegal. The Guembeul-1 well in the northern part of the St. Louis Offshore Profond license in 8,858 ft of water encountered 331 net ft of gas pay in two excellent-quality reservoirs, the company reported. The results demonstrate reservoir continuity and static pressure communication with the Tortue-1 well, which suggests a single gas accumulation. The mean gross resource estimate for the Greater Tortue complex has risen to 17 Tcf from 14 Tcf as a result of the Guembeul discovery, the company said. Kosmos, the operator, has a 60% interest in the well. Timis (30%) and Petrosen (10%) hold the remaining interest. In Salah Gas has started production from its Southern fields in Algeria.
Africa (Sub-Sahara) Oranto Petroleum has signed two production-sharing agreements (PSAs) with Uganda for oil and gas exploration around Lake Albert, the Nigerian company said. The deal covers the Ngassa Shallow and Ngassa Deep plays in blocks near the southern part of Lake Albert, according to the Uganda Ministry of Energy and Mineral Development. The pacts closely followed the signing of a PSA by Australia's Armour Energy that covers the Kanywataba block, a 133-square-mile area that was relinquished by three international companies in 2012 after failed exploration attempts. The agreements with Oranto and Armour involve acreage that was offered in Uganda's first competitive exploration licensing round last year. Uganda discovered oil in 2006 in the Albertine rift basin along the Democratic Republic of Congo border.
Byrne, Devin (Schlumberger) | Gurses, Sule (Schlumberger) | Orzechowski, Diana (Schlumberger) | Puccini, Piero (Shell International Exploration and Production, Inc.) | Klein, Mark (Shell International Exploration and Production, Inc.)
The first permanent electrical distributed temperature array system (EDTA-S) was installed with a single trip in water injection wells in the Perdido fold belt, Gulf of Mexico. The oil field is offshore in the Alaminos Canyon block ultradeepwater environment, which consists of heavily faulted sand formations. Water injection is part of field development, and the risk of out-of-zone injection (OOZI) has a negative impact on the pressure support in the oil zone and causes part of the injected water to be allocated to an undesired formation and reducing hydrocarbon recovery.
The EDTA-S was identified as a technology solution to monitor OOZI. It comprises a permanent array of high-resolution temperature sensors distributed across the formation and overlying caprock with discrete dual-sensor pressure and temperature (PT) gauge measurements. A subsea acquisition card interfaces with the subsea control module, sending power and telemetry to the system via an electric cable installed across the completion. The sensors are installed below the feedthrough packer and positioned on a shroud offset from the tubing to thermally decouple the sensors from the tubing and enable monitoring of the formations. The installation is supported with a data interpretation platform that the operator’s technical teams review to assess whether injected water has been rerouted from the reservoir to some other sink, such as a fractured caprock. This ensures that production is maximized by establishing all the injected volume in the reservoir zone.
The first operator to deploy the permanent EDTA-S subsea used it in one water injector in 2016, and one in 2017. To deploy the array system in a single-trip completion, several enabling components were developed and qualified, including an electrical feedthrough system for the tree/hanger, subsea and topside control integration, shrouded tubing for the array sensors, and a feedthrough control line set packer. The completion operations went according to plan, and the sensors were positioned to monitor 100 m of formation above the perforations. The monitoring system was successfully integrated with the subsea controls and topside system and provides real-time monitoring of the injection and warmback periods. A biweekly system data health check shows good quality of data. Warmback data analysis indicates cooling in the nonperforated sand formation and possible water invasion is moving upward. To date, there is no evidence of OOZI into the caprock or channeling to the wellbore. Advanced thermal modeling software was used for interpretation, and a good match has been obtained with sensor measurements. Modeling of warmbacks confirms the data analysis result with no evidence of OOZI currently in caprock. However, continuous monitoring provides value in that it will capture any behavior changes over time.
The paper details the integration of components, execution, and data interpretation of EDTA-S in the Perdido fold belt. There is a significant potential for implementation of this system in deepwater developments to increase recovery factors.
Mexico’s Energy Ministry had successfully implemented tender processes for exploration blocks and farm-out opportunities in the southern Gulf of Mexico (GoM). Significant discoveries have been announced by foreign companies in the shallow waters of the Campeche area, following the award of many deepwater blocks and the selection of Pemex’s partner for the development of the Trion oil discovery.
A key challenge faced by explorers in the southern GoM is to establish and validate the economic potential of the exploration opportunities using seismic amplitudes. This validation required the development and implementation of an interpretation framework for calibrating rock properties to seismic amplitudes. Empirical observations and rigorous theoretical modeling indicate that both Neogene and Paleogene exploration plays are amplitude-supported.
We built a robust and comprehensive Rock Physics (RP) model and associated interpretation framework that leverages an uniquely comprehensive local calibration data base with over 50 wells. The new predictive framework for Neogene and Paleogene exploration plays, fully integrated with petrology, pore pressure prediction, and basin modeling has been used for a confident screening and interpretation of the seismic amplitudes in terms of lithology, porosity, and fluids.
These integrated Quantitative Interpretation (QI) workflows have been effectively applied at regional and prospect scales to reduce reservoir and pore-fluid uncertainties. This regional work is an important component of Shell’s approach to block and prospect ranking, and has been part of the selection process for top leads. Additional field-scale QI work is also helping with a better understanding and evaluation of farm-out opportunities.
Presentation Date: Tuesday, October 16, 2018
Start Time: 1:50:00 PM
Location: 210C (Anaheim Convention Center)
Presentation Type: Oral
Today, more than a year after the first auction of -shallow-water blocks, operators have a better idea of what to expect from Mexican authorities, but there are still questions left to be answered with more public bids on the horizon, an expert said. In a presentation held by the SPE Gulf Coast Section's International Study Group, Loren Long discussed Talos Energy's decision to bid on Mexican shallow-water leases, its -experiences operating in the country, and his outlook on upcoming auctions. Long is the managing director for Talos' Mexican operations. Talos, in a consortium with Mexican company Sierra Oil and Gas and British company Premier Oil, won two contracts during the first phase of the initial round of auctions, held on 15 July 2015. The two blocks are located in the shallow waters off the coasts of Mexico's Tabasco and Veracruz states.
Each of the 25 onshore blocks offered to private companies in Mexico's December auction were awarded, almost all of which went to Mexican companies. It was the third installment of the country's historic Round One auction process made possible by a 2013 constitutional reform that for the first time in a generation allows private companies to extract oil and gas in Mexico. The results of the latest auction exceeded expert predictions as well as those of the Mexican government that prior to the auction, had announced it would consider five awarded blocks to be a success. Only five out of 19 blocks were awarded in the shallow water auctions held earlier in 2015. In total, 22 of the blocks were awarded to 13 Mexican companies and consortia, with three other blocks going to a Canadian oil company.
Mexico's historic public tender for its deepwater real estate resulted in the awarding of eight out of 10 blocks on offer. Held Monday in Mexico City, the event marked the fourth and final tender of the country's Round One process that has reopened the doors to foreign oil and gas firms for the first time since the energy sector was nationalized almost 80 years ago. A total of 13 companies were awarded rights to explore and produce from offshore fields in the Gulf of Mexico. The winning bids also committed to drill at least eight deepwater wells. All four blocks on offer in the Perdido area were awarded, including two that went to the Chinese Offshore Oil Corporation (CNOOC) and one to a consortium of Chevron, Pemex, and Inpex--Japan's largest oil company.
Mexico's second deepwater bid round failed to disappoint as 19 of 29 blocks were awarded, including nine to Anglo-Dutch supermajor and Mexican offshore newcomer Shell. Eleven international firms from 10 countries bidding individually and in consortia won blocks--thought to be mostly oil-rich--in the Perdido Fold Belt, Cordilleras Mexicanas basin, and Salina basin of the Gulf of Mexico. Nineteen firms from 15 countries placed 39 bids overall. The winning bids comprised 44,178 sq km, 23 well commitments, and $525 million in tiebreak payments. Mexico's National Hydrocarbons Commission (CNH) announced the results 31 January in Mexico City.
Mexico Awards Its First Deepwater Blocks; What Comes Next? The port of Dos Bocas, located along the coast of the Mexican state of Tabasco, is used to support jackup rigs and supply vessels but will need significant upgrades and expansion to become a deepwater facility. The nearby town of Dos Bocas also lacks many hotel rooms or an international airport. Held last December in Mexico City, the event marked the fourth and final auction of the country’s Round One, which reopened doors to foreign oil and gas investment for the first time since the country’s energy sector was nationalized almost 80 years ago. The awarded blocks went to 13 companies whose exploration and production operations are expected to generate around USD 34 billion over the next 15 years.