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Africa (Sub-Sahara) Drilling began in the SL-5-11 block in the deepwater shelf of west Africa. The targeted depth is 4700 m in water depths of more than 2000 m. Lukoil Overseas (49%) is the operator in partnership with Oranto (30%) and PanAtlantic (21%). Asia Pacific Drilling began on an exploration well in Block G4/50 in the Gulf of Thailand. The planned depth is 2350 m targeting Miocene sandstones. The well is estimated to contain mean prospective recoverable resources of 30 million bbl of oil. Salamander Energy is the operator with a 100% interest. Drilling has been completed on the Klalin-14 development well located in the West Papua region of Indonesia.
Learn more about training courses being offered. Learn more about training courses being offered. This course covers the fundamental principles concerning how hydraulic fracturing treatments can be used to stimulate oil and gas wells. It includes discussions on how to select wells for stimulation, what controls fracture propagation, fracture width, etc., how to develop data sets, and how to calculate fracture dimensions. The course also covers information concerning fracturing fluids, propping agents, and how to design and pump successful fracturing treatments. Learn more about training courses being offered. Current and future SPE Section and Student Chapter leaders are invited to engage and share. Every attendee leaves energised with a full list of ideas and a support network of fellow leaders. Those sections and student chapters actively participating in this workshop have consistently been recognized with awards as the best in SPE. SPE Cares is a global volunteering drive aimed at promoting, supporting and participating in community services at the SPE section and student chapter’s level. On its official launch this year at ATCE Dubai, SPE Cares will conduct a “Give a Ghaf” Tree Planting Programme to help preserve Ghaf’s cultural and ecological heritage. The Ghaf tree is an indigenous species, specific to UAE, Oman and Saudi Arabia. It is a drought tolerant, evergreen tree that can survive a harsh desert environment. The initiative not only aims to hold events/activities at ATCE, but also recognise community service that SPE members are already conducting in their respective student chapters and professional sections. The KEY Club, open daily, is an exclusive lounge for key SPE members. The lounge is open to those with 25 years or more of continuous membership, Century Club members, current and former SPE Board officers and directors, Honorary and Distinguished Members, as well as this year’s SPE International Award Winners and Distinguished Lecturers. DSATS (SPE’s Drilling Systems Automation Technical Section) will hold a half-day symposium featuring keynote presentations on urban automation. This symposium will explore technologies being used in developing smart cities through the automation of their infrastructure, transportation systems, energy distribution, water systems, street lighting, refuse collection, etc. These efforts rely on many of the same tools needed for drilling systems automation yielding increased efficiencies, lower maintenance and reduced emissions. Their knowledge and experience can guide the path being travelled by the oilfield drilling industry.
SPE is educating the next generation of aspiring engineers, scientists and managers about the oil and gas industry. This is an opportunity for school students in grades 9–12, studying Mathematics, Physics, Chemistry, Geography or interested in Petroleum Engineering are invited to join SPE members from all over the globe to discover the world of Petroleum Engineering. School teachers are invited to bring a group of 10–15 students. Students will be treated to a range of hands-on activities and presentations from renowned engineers. The oil price outlook coupled with the response of each oil and gas company to make ends meet has led to severe exploration budget cuts.
Decisions in E&P ventures are affected by Bias, Blindness, and Illusions (BBI) which permeate our analyses, interpretations and decisions. This one-day course examines the influence of these cognitive pitfalls and presents techniques that can be used to mitigate their impact. Bias refers to errors in thinking whereby interpretations and judgments are drawn in an illogical fashion. Blindness is the condition where we fail to see an unexpected event in plain sight. Illusions refer to misleading beliefs based on a false impression of reality. All three can lead to poor decisions regarding which work to undertake, what issues to focus on, and whether to forge ahead or walk away from a project. Strategic thinking and planning are key elements in an organisation’s journey to maximise value to shareholders, customers, and employees. Through this workshop, attendees will go through the different processes involved in strategic planning including the elements of organisational SWOT, business scenario and options development, elaboration of strategic options and communication to stakeholders. Examples are provided including corporate, business unit and department case studies. This seminar will teach participants how to identify, evaluate, and quantify risk and uncertainty in everyday oil and gas economic situations. It reviews the development of pragmatic tools, methods, and understandings for professionals that are applicable to companies of all sizes. The seminar also briefly reviews statistics, the relationship between risk and return, and hedging and future markets.
This seminar will teach participants how to identify, evaluate, and quantify risk and uncertainty in everyday oil and gas economic situations. It reviews the development of pragmatic tools, methods, and understandings for professionals that are applicable to companies of all sizes. The seminar also briefly reviews statistics, the relationship between risk and return, and hedging and future markets. Strategic thinking and planning are key elements in an organisation’s journey to maximise value to shareholders, customers, and employees. Through this workshop, attendees will go through the different processes involved in strategic planning including the elements of organisational SWOT, business scenario and options development, elaboration of strategic options and communication to stakeholders. Examples are provided including corporate, business unit and department case studies. Safety leadership focuses on the Human Factors (HF) which complement technical training to optimise reliability, safety, compliance, efficiency, and risks within a team-based environment. The IOGP laid down the HF skills and competencies required, and they form the basis for specialised O&G HF training's delivered by Mission Performance. This 1-day course reviews the key human factors but then also reviews what can be done to accelerate and scale operational roll-out for optimum and sustained impact, including integration with existing safety processes and (reporting) systems, refreshers, assessments, measurements, as well as the role of leadership and culture. Decisions in E&P ventures are affected by Bias, Blindness, and Illusions (BBI) which permeate our analyses, interpretations and decisions. This one-day course examines the influence of these cognitive pitfalls and presents techniques that can be used to mitigate their impact. Bias refers to errors in thinking whereby interpretations and judgments are drawn in an illogical fashion.
Africa (Sub-Sahara) Aker Energy, as operator of the Deepwater Tano Cape Three Points (DWT/CTP) block, encountered oil in the Pecan South-1A well offshore Ghana. Total volumes are estimated at 600 million–1 billion BOE. Aker Energy has a 50% participating interest in the block. Partners are Lukoil (38%), Ghana National Petroleum Corporation (GNPC) (10%), and Fueltrade (2%). Eni announced a discovery at the Agogo‑1 NFW well in Block 15/06 in the Agogo exploration prospect offshore Angola. The discovery, in 1636 m of water, is estimated to contain 450–650 million bbl of light oil in place. Eni owns a 36.8421% stake in the Block 15/06 joint venture.
Zacharia, Joseph (Schlumberger) | Kumar, Rajeev Ranjan (Schlumberger) | Shrivastava, Chandramani (Schlumberger) | Ghosh, Arnab (Schlumberger) | Talreja, Rahul (Schlumberger) | Shrivastava, Disha (Schlumberger) | Subbiah, Surej Kumar (Schlumberger) | Vinod, A. K (ONGC) | Bhagat, Jayant (ONGC) | Biswal, S. K (ONGC)
Exploration wells in India are being drilled to target tight sandstone reservoirs of Mesozoic age with potential hydrocarbon accumulation in the Gulf of Kutch (GK) & Gulf of Saurashtra (GS). Typical permeability ranges from 0.1 md to 2.5 md with effective porosity in range of 8% to 13% in good sandstone layers. These boreholes are seen to have substantial risks in drilling and completion, as evident by the severe wellbore instability events in the offset wells. Presence of wide breakouts and stress rotations along the wellbore axis with variation in dips along fractures are often observed, indicating complicated wellbore failure modes. Considering the increasing exploration activity and field development plans for these basins located in western offshore India, maintenance of hole integrity till open hole logging and optimizing perforation depths for hydro-fracturing jobs are the main challenge in upcoming wells. An advanced acoustic geomechanics workflow for the estimation of formation horizontal stresses from the inversion of four velocity radial profiles was implemented in shallower formations of offset wells with the help of advanced borehole 3D acoustic profiling measurements. Based on the estimation of stress parameters, stable mud weight windows and rock mechanical properties were estimated for a planned well. Reported over-gauged hole condition, caving, and stuck tool incidents are found at the depth intervals where the estimated breakout mud limit exceeds the mud weight used during drilling of offset wells. Pore pressure value is in range of 13.7 ppg to 14.1 ppg EMW with sudden change in regime during transition from Trap formation to Mesozoic formation. Stable mud weights to avoid breakouts are in range of 14.2 ppg to 14.7 ppg EMW for vertical well. The local normal fault regime is identified with few interbedded stress barriers. Simulated ECD value ranges 15.6 ppg to 16.1 ppg for an 8.5-in section with 600 gpm. The rock mechanical properties constrained by inverted stresses and wellbore failure were used to optimize bit and BHA design in the planned well. Real-time monitoring has been performed in the planned well using logging while drilling data, borehole images, and cutting analysis. Intermediate advanced acoustic profiling logs and drilling parameters were used in the planned well to directly estimate stress gradients and proactively keep mud weight within the stable mud weight window. By monitoring magnitude of breakouts present in LWD images and caving type, further remedial actions were taken. Few high angle features with gas peaks were encountered as seen in offset wells. Hole cleaning was performed regularly through pumping high viscous pills and cutting load was monitored at each connection through ECD and ESD variations. Near balance equilibrium was maintained to minimize hoop stress related skin around the sandstone layers. The modifications resulted in significant reduction of nonproductive time in the planned well as compared to the offset wells by 40%. Successful casing and cementing of 7-in liner to planned depth with good cement bond was also achieved, unlike offset wells where wellbore instabilities were severe. Upon designing an appropriate stimulation strategy in a HPHT and high-stress environment, closure pressure and breakdown pressure ranges were 12,300 psi to 13,500 psi and 13,000 psi to 14,800 psi, respectively, in sandstone with 8% to 13% effective porosity. To optimize expensive hydraulic fracturing stimulation treatments, the open hole advanced 3D acoustic logs were analyzed to identify and test gas bearing intervals. Intervals with suspected critically stressed natural fractures as indicated by 3D shear moduli changes were identified. The optimized intervals flowed gas to surface at good rates with minimal stimulation, proving commercial viability of the field.
Kumar, Rajeev Ranjan (Schlumberger) | Mukherjee, Sanjay (ONGC) | Bhagat, Jayant (ONGC) | V, Rajasekar (ONGC) | Bhuskute, Akshay (ONGC) | Bandyopadhyay, Bidesh (ONGC) | Talreja, Rahul (Schlumberger) | Singh, Manish (Schlumberger) | Subbiah, Surej Kumar (Schlumberger)
With known basement hydrocarbon accumulation, Mumbai High field in Western Offshore, India is a priority area for extending the concept of geo-mechanical fracture characterization in metamorphic basement reservoirs. Basement in Mumbai High is hydrocarbon bearing in areas proximal to major fault zones and intersections of major regional tectonic cross trends. Basement reservoirs have always been a challenge considering the lateral variation in rock properties with varying stress profile. The field under study has few wells producing hydrocarbon from varying depth intervals within Basement. Considering lower ROP, higher drilling cost and varying stress azimuth, a study has been conducted covering 3D Geomechanical numerical simulation and discrete fracture network stability analysis to identify sweetspots for new well locations targeting basement reservoirs while history matching field observations in offset wells. Basement reservoirs are often characterized by fracture sets which are conduit at present stress regime in far field condition. Some fracture sets are aligned within 20deg-30deg to maximum horizontal stress azimuth with few to be 90deg away from the maximum horizontal stress azimuth. To capture variation of fracture stability at field level, an analysis has been conducted at each offset well location, where geophysical logs, drilling parameters and geological information are integrated to construct a Mechanical Earth Model (
Summary In this paper, we provide some new insights into stick/slip vibration in drilling with polycrystalline diamond compact (PDC) bits. Fiftysix field runs under various drilling conditions were collected with the help of on-bit vibration sensors. Two types of stick/slip vibrations were identified: cutting-action-induced stick/slip and friction-induced stick/slip. Methods were developed to determine whether a stick/slip occurrence is induced by cutting action or by friction. Statistical analysis found that bit drilling efficiency (DE) is well correlated with the occurrence of cutting-action-induced bit stick/slip vibration. If a PDC bit is designed so that its DE is greater than a critical value, then the cutting-action-induced bit stick/slip vibration is not expected in drilling. Introduction Stick/slip vibration in drilling is one of the primary causes of cutter damage of PDC bits and early failures of downhole tools (Ledgerwood et al. 2013). Early efforts to address this issue were to measure downhole stick/slip by instrumenting vibration sensors near the PDC bits (Lamine et al. 1998) and near the roller cone bits (Chen et al. 2002). After the occurrence of stick/slip vibration in drilling is confirmed, efforts have been focused on understanding the root cause of stick/slip vibration of a PDC bit and the mitigation of stick/slip vibration during drilling. To better understand the root cause of stick/slip vibration of a PDC bit, three assumptions have been developed in the past three decades.
This paper provides some new insights into stick-slip vibration in drilling with polycrystalline diamond compact (PDC) bits. Fifty-six field runs under various drilling conditions were collected with the help of onbit vibration sensors. Stick-slip vibration occurrence during drilling was analyzed. Two types of stick-slip vibrations were identified: cutting action-induced stick-slip and friction-induced stick-slip. Methods were developed to determine whether a stick-slip occurrence is induced by cutting action or by friction. Statistical analysis found that bit drilling efficiency is well correlated with the occurrence of cutting action-induced bit stick-slip vibration. If a PDC bit is designed so that its drilling efficiency is greater than a critical value, then the cutting action-induced bit stick-slip vibration is not expected in drilling. Increasing the aggressiveness of the cutting structure of a PDC bit within a limited critical depth of cut is found to be helpful to mitigate bit stick-slip vibration.