scholarly journals Transverse Vibration Analysis of the Riser in Deep Water

2015 ◽  
Vol 8 (1) ◽  
pp. 38-44 ◽  
Author(s):  
Zifeng Li ◽  
Peng Wang ◽  
Min Zhao ◽  
Xuejiao Li
Keyword(s):  
Deep Water ◽  
Transverse Vibration ◽  
Oil And Gas ◽  
Drilling Fluid ◽  
Bending Moment ◽  
Mechanical Analysis ◽  
Gas Production ◽  
Bend Angle ◽  
Transverse Displacement ◽  
Oil And Gas Development

With high international oil price, the exhaustion of onshore resources and declination of oil and gas production in shallow sea, deep water has become the important succeeding area of worldwide oil and gas. During deepwater oil and gas development, riser must be used to isolate seawater, circulate drilling fluid, and compensate the heaving movements of the string and so on. However, with the operating water depth increasing, the loads of waves and ocean currents on the riser become more complex, leading to extremely high construction risk and funds risk of deep-water operations. In this paper, considering the combined action of inside and outside fluid on the riser, transverse vibration partial differential equation is derived, and solved with finite difference method. Meanwhile, transverse displacement response of the riser acted by outer load is determined, and the shear force, bending moment and bend angle at different locations are solved, then the influence factors of riser transverse vibration are analyzed. The mechanical analysis of marine riser can provide a theoretical guidance for safe and effective drilling work, which is of great significance for the offshore oil and gas development.

Geochemical Partitioning of Metals in Spent Drilling Fluid Solids

1998 ◽  
Vol 120 (3) ◽  
pp. 208-214 ◽  
Author(s):  
L. E. Deuel ◽  
G. H. Holliday
Keyword(s):  
United States ◽  
Organic Matter ◽  
Environmental Protection Agency ◽  
Oil And Gas ◽  
Chemical Reactivity ◽  
Drilling Fluid ◽  
The United States ◽  
Gas Production ◽  
Residual Fraction ◽  
Mn Oxide

Metals in oil and gas fluids have been of concern to the environmental and industrial communities since 1976. As a result, metals in 31 spent drilling fluids representative of the major oil and gas production provinces in the Continental United States, were fractionated into exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter, and residual forms using a sequential extraction (summation of fractions) technique. Bioavailability and mobility of metals in solid matrices follow in sequence of the operational defined fractions with chemical reactivity decreasing in the order of exchangeable > bound to carbonate > bound to Fe-Mn oxide > bound to organic matter > residual fractions. Metals evaluated in this study include arsenic, barium, cadmium, chromium, lead, and zinc. The summation of fractions was compared to independent total metals analysis using the United States Environmental Protection Agency (USEPA) SW-846 Method 3050 digest procedure to evaluate metal recoveries. No difference was observed in the summation of fractions and EPA Method 3050 total metal values for arsenic, barium, and cadmium. EPA Method 3050 digest was about 28 percent lower in chromium, and about 19 percent lower in lead and 16 percent lower in zinc than the total by summation of fractions. Almost all of the barium (95.6 percent) was recovered in the residual fraction. Arsenic was recovered primarily in the residual fraction (74.3 percent) and the Fe-Mn oxide fraction (16.1 percent). The highest quantity of cadmium was recovered in the residual fraction (43.3 percent), followed by the bound to organic (27.9 percent), and bound to Fe-Mn oxide (21.1 percent) fractions. Chromium was observed primarily in the residual (40.4 percent) and bound to Fe-Mn oxide (34 percent) fractions. Lead was distributed primarily in the bound to Fe-Mn oxide (49.3 percent), and residual (27 percent) fractions. Zinc was almost equally distributed in the bound to organic (36.2 percent), and bound to Fe-Mn oxide (33.1 percent) fractions. Cadmium (3.9 percent) and arsenic (2.7 percent) were the only metals with an exchangeable fraction >1 percent of the total. Low total and/or low exchangeable metal concentrations ultimately control the bioavailability and mobility of metals in spent drilling solids and limit the potential for an adverse impact on the environment.

Research and Application of the Deep Horizontal Drilling and Completion Technology for Liaohe Oilfield Buried Hill Reservoir

2012 ◽  
Vol 241-244 ◽  
pp. 1396-1399
Author(s):  
Gui Min Nie ◽  
Dan Guo ◽  
Yan Wang ◽  
Xiao Wei Cheng
Keyword(s):  
Oil And Gas ◽  
Drilling Fluid ◽  
Horizontal Wells ◽  
Gas Production ◽  
Oil Field ◽  
Oil And Gas Production ◽  
Horizontal Drilling ◽  
Liaohe Oilfield ◽  
Buried Hill ◽  
Composite Drilling

With the depletion of shallow-layer oil and gas pools inLiaohe oilfield, buried hill stratigraphic reservoirs in Liaohe oil field are becoming main objectives for exploration in recent years, especially in high-risk areas of Xinglongtai deep the Hing ancient buried hill resources are particularly rich. Since 2007, Liaohe oilfield increased investment for Buried Hill reservoirs with deep horizontal drilling developt the buried hill reservoir. Liaohe has completed 36 deep horizontal, with a total footage of 183920m, the average depth of 5109m. Improving drilling speed of "buried hill deep horizontal and branch horizontal wells”, and reducing drilling costs are of great urgency. “Hing buried hill deep horizontal, horizontal wells,” with composite drilling technology, supporting the optimization of PDC bits, the high-pressure jet drilling, the MWD borehole trajectory control and optimization of drilling parameters, the new drilling fluid technology and so on. With a large number of horizontal wells put into Buried Hill stratigraphic reservoirs, oil and gas production of average deep horizontal well increase of 2-5 times. Besides, the previous recovery and production of oil and gas reservoirs significantly improved to create an objective economic and social benefits.

scholarly journals Experimental Investigation of Inhibitive Drilling Fluids Performance: Case Studies from United States Shale Basins

Energies ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 5142
Author(s):  
Nabe Konate ◽  
Saeed Salehi
Keyword(s):  
Oil And Gas ◽  
Drilling Fluid ◽  
Gas Production ◽  
Drilling Fluids ◽  
Eagle Ford Shale ◽  
Oil And Gas Production ◽  
Shale Formations ◽  
Drilling Performance ◽  
Marine Shale ◽  
Fluid Systems

Shale formations are attractive prospects due to their potential in oil and gas production. Some of the largest shale formations in the mainland US, such as the Tuscaloosa Marine Shale (TMS), have reserves estimated to be around 7 billion barrels. Despite their huge potential, shale formations present major concerns for drilling operators. These prospects have unique challenges because of all their alteration and incompatibility issues with drilling and completion fluids. Most shale formations undergo numerous chemical and physical alterations, making their interaction with the drilling and completion fluid systems very complex to understand. In this study, a high-pressure, high-temperature (HPHT) drilling simulator was used to mimic real time drilling operations to investigate the performance of inhibitive drilling fluid systems in two major shale formations (Eagle Ford Shale and Tuscaloosa Marine Shale). A series of drilling experiments using the drilling simulator and clay swelling tests were conducted to evaluate the drilling performance of the KCl drilling fluid and cesium formate brine systems and their effectiveness in minimizing drilling concerns. Cylindrical cores were used to mimic vertical wellbores. It was found that the inhibitive muds systems (KCl and cesium formate) provided improved drilling performance compared to conventional fluid systems. Among the inhibitive systems, the cesium formate brine showed the best drilling performances due to its low swelling rate and improved drilling performance.

Dynamic Behaviour of Compliant Towers in Deep Sea

2003 ◽  
Author(s):  
Gu¨nther F. Clauss ◽  
June Young Lee
Keyword(s):  
Deep Water ◽  
Oil And Gas ◽  
Wave Structure ◽  
Nonlinear Effects ◽  
Gas Production ◽  
Program System ◽  
Period Range ◽  
Structure Interaction ◽  
Viscous Forces ◽  
The North

For oil and gas production in deep water (> 500m) compliant structures are designed. By dedicated reduction of stiffness and optimization of mass (including added mass contributions) the fundamental period is tuned to about 30s, which is well above the period range of significant wave energy. This paper presents the results of a comprehensive numerical analysis of the hydroelastic behaviour of compliant towers in deep water, investigating the dynamic response of a flexible structure in a given sea state. The numerical program system is based on ADINA with an integrated hydrodynamic module for wave/structure interaction. Nonlinear effects of viscous forces are considered using Morison’s vector equation. In addition nonlinear characteristics of soil/structure interaction are also included according to API regulations. At first, for verification of the program system, the numerical results of a monotower are compared to analytical solutions obtained by modal analysis of the structure in regular and irregular seas. Based on the validated program a compliant tower installed in 503 m water in the Gulf of Mexico (Baldpate tower) is modeled in 3D, and the characteristic dynamic behavior is evaluated. Finally, the tower is exposed to a real “freak” wave (the 25.6m high New Year Wave which has been registered at the North Sea Draupner platform on January 1, 1995), and the associated loads and motions are evaluated.

Analysis of “CPOE62” Workover Platform's Bottom Stability

2012 ◽  
Vol 452-453 ◽  
pp. 1312-1317
Author(s):  
Ze Fu Bao ◽  
Cai Hong ◽  
Ya Zhou Jiang ◽  
Jiang Ping Wang
Keyword(s):  
Work Environment ◽  
Deep Water ◽  
Deep Sea ◽  
Bohai Sea ◽  
Oil And Gas ◽  
Service Process ◽  
Variable Load ◽  
Environmental Load ◽  
Oil And Gas Development

“CPOE62”platform is a self-elevating workover platform. Under the construction and service process，because of the particularity of work environment，Not only does it bear its own weight and variable load, but also bears the role of environmental load all the time. Sometimes this environment load will have an enormous destruction. Based on the analysis of environmental load, the author checks the bottom stability and verifies it through ANSYS. These will provide some useful information for the deep sea platform research in Bohai Sea deep-water oil and gas development, which achieves higher security and economic efficiency.

Offshore Oil and Gas: The Future Engineering Contribution

1974 ◽  
Vol 188 (1) ◽  
pp. 11-24 ◽  
Author(s):  
L. C. Allcock
Keyword(s):  
Continental Shelf ◽  
Oil And Gas ◽  
New Technology ◽  
Gas Production ◽  
Oil And Gas Development ◽  
Oil And Gas Production ◽  
The Future ◽  
Offshore Oil And Gas ◽  
Offshore Oil ◽  
Production Industry

Development of offshore oil and gas production from the continental shelf and in even deeper water will be dependent on engineers. It is of primary importance to understand the nature of the oil and gas production industry in order to follow more clearly the contribution that will be required from many of the professional branches of engineering, and a great deal of new technology must be developed in order that the problems of the future may be overcome. The difficulty may not be in defining the future engineering of oil and gas development but in finding engineers in sufficient numbers to meet the demand.

Air quality concerns of unconventional oil and natural gas production

2014 ◽  
Vol 16 (5) ◽  
pp. 954-969 ◽  
Author(s):  
R. A. Field ◽  
J. Soltis ◽  
S. Murphy
Keyword(s):  
Air Quality ◽  
Natural Gas ◽  
Human Health ◽  
Oil And Gas ◽  
Gas Production ◽  
Oil And Gas Development ◽  
Natural Gas Production ◽  
Unconventional Oil ◽  
Oil And Natural Gas ◽  
Unconventional Oil And Gas

Air quality impacts from unconventional oil and gas development range from local to global scales impacting human health and climate.

scholarly journals Prediction of the wellhead uplift caused by HT–HP oil and gas production in deep-water wells

2021 ◽  
Vol 7 ◽  
pp. 740-749
Author(s):  
Shuangjin Zheng ◽  
Wei Li ◽  
Chenguang Cao ◽  
Chao Wang
Keyword(s):  
Deep Water ◽  
Oil And Gas ◽  
Gas Production ◽  
Oil And Gas Production ◽  
Water Wells
Sign in / Sign up

Export Citation Format

Share Document