Ahead of the release of the Trump administration's changes to Obama-era rules governing offshore oil platforms, Michael Bromwich said he is worried. "I don't think they are in the public's interest," he said. The Bureau of Safety and Environmental Enforcement announced updated Oil and Gas Production Safety Systems regulations. The revisions reduce unnecessary regulatory burdens while ensuring that operations remain safe and environmentally responsible. The US Bureau of Safety and Environmental Enforcement’s SafeOCS program has released its 2017 annual report on Blowout Prevention System Safety, noting 18 of 25 operators associated with rig operations in the Gulf of Mexico reported 1,129 equipment component failure events.
A new tool enables variable bore rams and shear rams to be tested in one run, cutting rig time significantly. Developing a well-specific subsea-capping contingency plan involves assessing the feasibility of deploying a capping stack from a floating vessel, determining the weight and stability, and performing dynamic-flow simulations of closing the capping stack outlets. Despite multitier safeguards, blowouts occur. When such accidents happen, rate estimation is an important and daunting task.
Well integrity and well barriers have been part of the exploitation for oil and gas for nearly a century, with the introduction of the blowout preventer (BOP) in the 1920s. In response to the 2010 Deepwater Horizon incident that claimed the lives of 11 men and led to the worst oil spill in United States history, the offshore industry devised new technologies and methods that would allow for a quicker response in the US Gulf of Mexico.
In this study, pressure-while-drilling technologies are combined with software simulations to differentiate drilling-fluid thermal expansion, wellbore ballooning, and formation influx during riserless drilling operations. A scientist hired by federal regulators to look for ways to reduce the risk of well blowouts said it is time for the oil and gas industry to treat kicks taken while drilling the same way doctors treat heart attacks.
With the US Bureau of Safety and Environmental Enforcement as a cochair of the steering committee, SPE held a 2-day summit in April to discuss the development and implementation of an industrywide safety-data sharing framework. More precise measurement can create a dilemma. One example is the precise fluid flow measurements used to control managed pressure drilling (MPD) systems. A scientist hired by federal regulators to look for ways to reduce the risk of well blowouts said it is time for the oil and gas industry to treat kicks taken while drilling the same way doctors treat heart attacks. The United States’ top offshore regulator said his agency is adopting new policies and measures to improve its working relationship with the offshore industry.
The SPE International Conference and Exhibition on Formation Damage Control covers challenges and remedies for all things related to the identification, prevention, and remediation of formation damage. The SPE International Conference and Exhibition on Formation Damage Control covers challenges and remedies for all things related to the identification, prevention, and remediation of formation damage.
The maritime world has been facing difficulty "last mile" logistic dilemmas of natural/manmade access barriers, lack of infrastructure, shallow waters, elevated sea states, adverse weather conditions (e.g., storms, foggy/misty, lightlessness, windy, stormy, or icy/snowy), unknown bathymetry, etc. The industries facing such dilemma have included (1) offshore petroleum exploration/production; (2) offshore mining other than petroleum; (3) marine pollution abatement; (4) humanitarian assistance/disaster relief (HA/DR); (5) offshore firefighting and search and rescue (SAR); (6) offshore energy generation, storage and transmission; and (7) military sectors. A new breed of Autonomous Maritime ISO-Container Vehicles (AMISOC Vehicles) has been invented for effectively solving the above decade-old "last mile" logistic dilemmas. Another dilemma also facing the maritime industries is the ship-to-ship, ship-to-platform or platform-to-ship transfer of cargos at sea. These cargo transfer operations at sea are expensive, difficult to perform and risky which have plagued reliable, efficient and cost-effective sustainment of offshore petroleum exploration/ production platforms under adverse weather periods and/or at elevated sea states (e.g., 3). To be more fully presented in this paper hereinafter, unique and innovative autonomous/unmanned vehicles that are container-box based (or AMISOC vehicles) and their companion technology known as in-situ launch and recovery devices (LRDs) (remotely controllable) have been invented to inexpensively and reliably solve the above critical maritime dilemmas offshore.
Zhang, Dujie (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation • Southwest Petroleum University) | Kang, Yili (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation • Southwest Petroleum University) | You, Lijun (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation • Southwest Petroleum University) | Li, Xiangchen (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation • Southwest Petroleum University) | Li, Jiaxue (CNPC Tarim Oilfield Company) | Chen, Yashu (Missouri University of Science and Technology)
Cretaceous Bashijiqike ultra-deep tight sandstone, the main pay zone of Keshen gas field in Tarim Basin, has characteristics such as huge buried depth (6500 m ~ 8000 m), ultra-low matrix permeability and well-developed natural fractures. Due to lacking of a thorough research on the formation damage mechanism, there is no corresponding formation damage control method. And that's why this reservoir is suffering from severe formation damage. In this paper, the multi-scale characteristic of the reservoir space and seepage channel was described firstly. Then, a series of experiments were carried out to determine the multi-scale damage mechanisms, including the fluid sensitivity damage of matrix and fracture, the phase trapping damage of matrix and fracture, the loading capacity and the dynamic damage of fracture induced by drilling fluids. Then, the multi-scale formation damage mechanisms were summarized. Results showed the gas reservoir are characterized by typical multi-scale structures, i.e. micro-nano pore-throat and multiscale natural fractures. Severe salt sensitivity damage, alkali sensitivity damage and water phase trapping damage were the main damage mechanism of micro-nano pore-throat. For micro-fracture (aperture ≤ 100 μm), the dynamic damage degree induced by drilling fluids can reach up to 60.01 %. For Mesoscale fracture (aperture > 100 μm), lost circulation induced by inadequate loading capacity of drilling fluids was the main damage mechanism. Then, a complete multi-scale approach for damage control was proposed: ① Using oil-based drilling fluids to inhibit the fluids sensitivity damage and phase trapping damage of micro-nano pore-throat and natural microfracture; ②Optimizing the solid particle size distribution of drill-in fluid to reduce the dynamic damage degree of micro-fracture induced by drilling fluids; ③Adding acid soluble temporary plugging materials while drilling to prevent lost circulation. According to the proposed approach, the total production of the test well was 94 × 104 m3, which is much higher than that of non-test wells. This research provides a detailed case of forming the multi-scale approach for damage control based on the multi-scale formation damage mechanisms. This method is practical and useful, and it has important guiding significance to develop the ultra-deep fractured tight gas reservoirs efficiently.
As the scope of deepwater operations increases, the need for cost-effective well servicing is paramount, particularly because of the continued challenges associated with current volatile commodity pricing. One of the first requirements on any subsea deepwater intervention with a horizontal wellhead production tree is pulling the subsea horizontal tree isolation lock mandrel plugs, commonly referred to wellhead or crown plugs. This can be a "show stopper" event if not planned correctly. Because of the critical nature of this action, the majority of operators follow a two-prong approach, with a primary plan of action and a contingency procedure, to help ensure barrier removal proceeds as planned. Although successful removal of the crown plugs is the principal concern, it needs to be completed cost-effectively for the intervention to obtain approval.
The advent of digital slickline (DSL) allows surface readout (SRO) monitoring during the removal and installation of these barriers to provide an increased level of confidence during this important phase of the operation. This paper outlines case studies of the real-time sensors available with the RF communication DSL system that was highlighted previously (
Additionally, the straight pull battery operated extended-stroke downhole power unit highlighted in
New developments as the downhole power generator was ported to DSL are discussed, notably on- command motor controls and SRO, which was traditionally only available in memory. A downhole anchor was added to the toolbox, which can be run in combination with the downhole power generator to expand effectiveness, as new production trees might not allow for a no-go landing shoulder. To address the increased water depths, the 3.59-in. extended-stroke downhole power generator was upgraded to 80,000 lbf pulling force.