Mature Fields

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...

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...

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...

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...

Mature Field Rejuvenation with Infill Drilling

In this tough economic climate, efficient mature field rejuvenation has become a major challenge for operators looking to balance the books. The most successful mature field rejuvenation projects are ultimately driven by a solid understanding of the existing infrastructure, reservoir geometry, and remaining hydrocarbons in place. Most large mature fields were initially developed long before many of the technologies we use today were available, such...

Riding the Tide During Troubled Times With Mature Fields Management

Mature fields management through integrated asset teams and purpose-driven technology deployment Energy in its various forms is the perennial building block that keeps this world ticking. The oil and gas industry is one of the most significant contributors to the ever evolving growth we see in everyday life. The impact of the current oil price on the global economy has been profound, with crude prices...

Tech Paper: Optimization of Matrix Acidizing With Fluids Diversion in Real-Time Using Distributed Temperature Sensing and Coiled Tubing

Real-time fiber optic contributed to successfully evaluating the effectiveness of fluids and mechanical diversion Carbonate formations in southern Mexico are commonly stimulated using matrix acidizing treatments to increase well productivity by removing near-wellbore (NWB) damage. Such damage can be attributed to accumulation of paraffin and asphaltene deposits during the productive life of the well and, in other scenarios, to fluid invasion while performing workover activities....

Considerations for Waterflooding in Mature Fields Reservoir Optimization

From hot water to working water: observations from the geothermal industry Waterflooding in mature fields can offer significant recovery factor increases and extend the economic life of an asset. However, often the level of detail dedicated to understanding how the reservoir(s) will react to injection at the initial stage is not sufficient to realize the full potential of this optimization technique. From the...

Tech Paper: Selective Stimulation Using Self-Degrading Diverter Deployed During Completion Stage

Challenges, lessons learned and step-by-step procedures to achieve outstanding results In selective stimulation of a well with a complex completion in a naturally fractured carbonate reservoir in a mature field, the use of a self-degrading diverter deployed by rigless means through 1 1/2-in. coiled tubing (CT) was necessary in addition to an effective acidizing schedule using relative permeability modifiers (RPMs) as an additional diverter....

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