Safdar Khan

Integrating Laboratory Testing and Numerical Modelling for a Giant Maturing Carbonate Field in UAE — II. Coupled Geomechanical Modelling of Stacked Reservoir Intervals

Abdelwahab Noufal, Gaisoni Nasreldin, Faisal Al-Jenaibi, Joel W. Martin et autres

Abstract A mature field located in a gently dipping structure onshore Abu Dhabi has multiple stacked oil and gas reservoirs experiencing different levels of depletion. The average reservoir pressure in some of these intervals had declined from the early production years to …

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Torsional Crack Localization in Palm Oil Clinker Concrete Using Acoustic Emission Method

Safdar Khan, Soon Poh Yap, Chee Ghuan Tan, Reventheran Ganasan et autres

Palm oil clinker (POC) aggregates is a viable alternative to the naturally occurring sand and gravel in the manufacturing of concrete. The usage of POC aggregates assists in the reduction of solid waste and preserves the consumption of natural resources. Although researchers …

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Niche Reservoirs - Shallow Gas Fracturing; The Challenges and Learnings

Nabila Lazreq, Osama Akl, Rakesh Kumar, Anna Deminova et autres

Abstract Production of shallow gas has presented a unique opportunity to implement a fit for purpose fracturing workflow due to the level of complexity these reservoirs present. Initially acquired logging data including open hole logs, mud logs, wireline pressure measurements and reservoir …

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Integrating Laboratory Testing and Numerical Modeling for a Giant Maturing Carbonate Field in UAE: I. Geomechanical Laboratory Characterization of Stacked Reservoir Intervals

Abdelwahab Noufal, Joel W. Martin, Eudes Siqueira Muniz, Abdulla M. Shehab et autres

Abstract A maturing UAE field has multiple stacked oil and gas reservoirs experiencing differential depletion causing unequal increases in vertical and horizontal effective stresses on reservoirs and bounding rock units. The stress variation has resulted from long-term production with some intervals experiencing …

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Completion Quality Classes to Characterize Basin Complexity: New Framework to Incorporate Localized and Regional Reservoir Heterogeneity into Field Exploration and Development Optimization

M. Nihat Gürmen, Christopher N. Fredd, Taner Batmaz, Stevanus dwi Kurniadi et autres

Abstract Innovation and advances in technology have enabled the industry to exploit lower-permeability and more-complex reservoirs around the world. Approaches such as horizontal drilling and multistage hydraulic fracturing have expanded the envelope for economic viability. However, along with enabling economic viability in …

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Impact of Local Stress Heterogeneity on Fracture Initiation in Unconventional Reservoirs: A Case Study from Saudi Arabia

Maksim Oparin, Almaz Sadykov, Safdar Khan, Roberto Tineo

Abstract Drilling horizontal wells with subsequent multi-stage hydraulic fracturing have become essential for economic production of oil and gas from unconventional resource plays. The selection of appropriate intervals for perforation clusters (in cased holes) is one of the keys for a successful …

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Geomechanical Implications on Unconventional Reservoir Fracturing in Saudi Arabia

Safdar Khan, Maksim Oparin, Roberto Tineo, Doug Bentley

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Integrated Well Construction Approach for Exploratory Shale Gas Horizontals

Anurag Yadav, Ahmad Shakeel Qureshi, Safdar Khan

Abstract Horizontal wells with multi-stage fracturing are typically drilled in shale gas plays for them to become economically feasible to produce gas. Drilling long laterals in shale ushers wellbore stability challenges especially in build section due to hole packoff, tight hole, stuck …

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Prudent and Integrated Approach to Understanding Wellbore Stability in Canadian Foothills to Minimize Drilling Challenges and Non-Productive Time*

Safdar Khan, Sajjad Ansari, Nader Khosravi

Summary A proactive and analytic tasks were undertaken to circumvent anticipated drilling problems in a challenging Canadian Foothills project. The geology and structure were complex with multiple sheets of overthrust fault and highly dipping beds. Some of the faults were associated with …

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Wellbore Stability Optimization in Shale Gas Wells by Integrating Geomechanics and Drilling Practices

Safdar Khan, Anurag Yadav

ABSTRACT Horizontal wells with multi-stage fracturing are typically used in shale gas plays for them to become economically feasible to produce gas. Two distinct types of challenges are faced while drilling horizontal wells in shale, first type is wellbore instability potentially leading …

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Impact of Mechanical Anisotropy on Design of Hydraulic Fracturing in Shales

Safdar Khan, Rick Williams, Sajjad Ansari, Nader Khosravi

Abstract Shale formations have laminated structures that result in directionally dependent mechanical properties. Conventional completion design approaches do not consider the material anisotropy or the laminated nature of shales. This can result in an underestimation of stresses, and lead to incorrect conclusions …

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Understanding Shale Heterogeneity - Key to Minimizing Drilling Problems in Horn River Basin

Safdar Khan, Sajjad Ansari, Hongue Han, Nader Khosravi

Abstract More than 70% of nonproductive time (NPT) and increases in drilling cost are related to wellbore instabilities. Shale formations are the primary sources (90%) for wellbore instabilities. Numerous wellbore instability problems have been reported in the Horn River basin (HRB), the …

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