Diagnostic Fracture Injection Testing Tactics in Unconventional Reservoirs
- Dung Hanh Nguyen (ConocoPhillips) | David Daniel Cramer (ConocoPhillips)
- Document ID
- Society of Petroleum Engineers
- SPE Hydraulic Fracturing Technology Conference, 4-6 February, The Woodlands, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2013. Society of Petroleum Engineers
- 3.2.3 Hydraulic Fracturing Design, Implementation and Optimisation, 3 Production and Well Operations, 1.2.2 Geomechanics, 5.3.9 Steam Assisted Gravity Drainage, 2.5.2 Fracturing Materials (Fluids, Proppant), 5.8.6 Naturally Fractured Reservoir, 1.14 Casing and Cementing, 1.2.3 Rock properties, 1.8 Formation Damage, 5.6.4 Drillstem/Well Testing, 2 Well Completion, 5.6.3 Pressure Transient Testing, 5.4.2 Gas Injection Methods, 5.2 Reservoir Fluid Dynamics, 4.1.5 Processing Equipment, 4.6 Natural Gas, 5.6.5 Tracers, 2.5.1 Fracture design and containment, 2.4.3 Sand/Solids Control, 5.2.1 Phase Behavior and PVT Measurements, 2.2.2 Perforating, 5.8.2 Shale Gas, 6.5.2 Water use, produced water discharge and disposal, 5.1 Reservoir Characterisation, 4.3.4 Scale, 4.1.2 Separation and Treating
- Treatment Optimization, Diagnostic Fracture Injection Testing, Fracture Diagnostics, Well Testing, Reservoir Characterization
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To achieve optimal production from unconventional reservoirs, it is useful to determine the permeability, pore pressure, and state of stress of rock strata. Doing so will lead to properly designed treatments, realistic predictions of well performance, and a basis for normalizing reservoir contribution when evaluating completion and stimulation effectiveness.
An effective way to derive the necessary reservoir information is to conduct in-situ pressure transient tests. Since it is difficult to inject fluid into or withdraw fluid from the pore network of tight rock, diagnostic fracture injection tests (DFIT) have been employed to create an analyzable pressure decline response, as well as to derive the minimum horizontal stress via fracture closure identification.
This paper is a study of numerous DFITs conducted in unconventional reservoirs throughout the world to evaluate the reservoir and geomechanical characteristics of the pay zone and bounding intervals. Within this body of work, experiments were implemented to study the impact of testing methods on the test response and various types of analysis methods documented in the literature were implemented and compared. The paper summarizes findings and introduces tactics for planning/conducting tests and evaluating results in a variety of unconventional reservoir types.
|File Size||3 MB||Number of Pages||43|