Tech Paper: Advanced Geosteering Technology Promotes the Accuracy of Well Placement in the Thin Reservoirs of China Mature Oilfield

Safely and efficiently maximize reservoir exposure in mature fields After more than a decade of producing oil from the thick marine sand reservoirs in the HaDeXun oil field in the Tarim basin of western China, focus has shifted to the challenges of drilling thinly laminated reservoirs. To maximize efficiency and production, geosteering services, as well as bottomhole assembly (BHA) and bit optimization, were used for the...

Tech Paper: Development and Field Application of an Innovative, Minimally Damaging, Low-ECD Invert Emulsion Fluid for Enhanced Drilling and Completion of HP/HT Wells

Multi-purpose fluid improves drilling efficiency, reduces cost and minimizes production impairment As known the first application experiment for lifting fluids was conducted in Germany in 1797. Then the idea was developed in 1846 utilized compressed air to lift oil from wells. This paper describes the first field application of a high-pressure/high-temperature (HP/HT) organophilic clay-free invert emulsion fluid (OCF IEF) weighted with small-particle-sized (SPS) barite, qualification of...

Case Study: eRED® Valve Saves Six Hours Rig-Time for BP

eRED® Valve opens and closes remotely, eliminating the need for wireline intervention CHALLENGE – BP needed a more efficient method to set a shallow barrier and to reduce rig time for pressure-control equipment (PCE). In doing this, BP wanted to ensure that the solution chosen would adapt to the existing completion infrastructure that was set in the well. SOLUTION – This water injection completion consisted of...

Tech Paper: Auto-Gas Lift and Smart Well Completion Challenges to Extend Well Life and Running toward Cost Effective Program, Field Case Study

The concept of this completion is to use the gas cap energy from different reservoirs to lift the heavy and high water cut wells As known the first application experiment for lifting fluids was conducted in Germany in 1797. Then the idea was developed in 1846 utilized compressed air to lift oil from wells. In year 1900 the lifting done by compressed air injected through the...

Tech Paper: Developments in Sandstone HF Acidizing: HF Fluid Compatible with Na or K Brines and Carbonate-Laden Mineralogy for High Temperatures (360°F)

Aminopolycarboxylic acid chelating agent helps with the removal of mineral buildup in sandstone formations Using hydrofluoric (HF) acid for the removal of clays and silica minerals impairing permeability in sandstone formations requires fluids free of sodium or potassium ions. High temperatures (> 300°F) further limit HF acid use and its effectiveness because of potentially damaging effects to the formation and its corrosivity. This paper discusses laboratory testing of...

Tech Paper: Maximizing the Life of the Well Through Successful Cementing Technologies in Thermal Wells

 High-performance thermal self-healing cements prove successful in extreme conditions Reversing the natural process of pressure decline in hydrocarbon deposits and decreasing damage in the sandface caused by drilling, production, etc. are the most significant operator objectives for maximizing the extraction of hydrocarbon reserves. This paper discusses the successful application of cementing technologies in thermal wells to maximize the life of the well. In areas, such as the...

Tech Paper: Intelligent Completions Customized to Meet the Challenges of Malaysia Reservoirs: Work Flow and Case Histories

Improving intelligent completion designs helps operator reduce cost and improve productivity Intelligent well completions (IWC) have been installed in Malaysia since 2003, but only recently has this technology become widely accepted. This acceptance has resulted from recognition of values such as reduced capital cost, improved productivity, and increased ultimate recovery. Initial documentation on IWC capabilities was presented in 2012 (Masoudi et al. 2012). Since then, additional...

Well-considered perforation strategies can enhance mature field production

Using an optimized hydraulic fracturing perforation strategy to maximize production may increase cash flow by accessing missed pay. (Hull, 2015) Well-designed perforations are vital to a well’s completion because they are the connection between the wellbore and the formation. To avoid cuts to incremental production, operators should consider the challenges involved in correctly perforating. For example, maintaining high static differential pressure (underbalance) is required to prevent...

Tech Paper: Alternative Technologies in Drill-In Fluids for Depleted Reservoirs

Designing the right drill-in fluid system can help minimize productivity impairments Induced losses occur when the drilling fluid density, required for well control and to maintain wellbore stability, exceeds the fracture resistance of the formations. Depleted reservoirs present a particular challenge. As the reserves decline, the pore pressure decreases, which weakens hydrocarbon-bearing rocks. Nearby or interbedded low permeability rocks, however, may maintain their pore pressure. This scenario...