Detailed Reservoir Characterization for Key Strategies of Unconventional Reservoir Development

Characterizing hydrocarbon distribution is one of the most critical and challenging steps, because the initial hydrocarbon saturation determines the original hydrocarbons in place and also subsequent reservoir numerical simulation during the field development stage including history match, production forecast, sensitivity analysis, etc. Accurate hydrocarbon distribution knowledge is vital for optimum reservoir characterization, hydrocarbon exploration and production.For an unconventional reservoir, the distribution of hydrocarbon and water is abnormal and complex compared with a conventional reservoir. The characterization and representation of the reservoir requires a multi-discipline team incorporating geology, geophysics, petrophysics, core analysis, reservoir engineering, etc. to enhance the understanding of reservoir heterogeneity and the target area selected for new development wells during the development phase.

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Reservoir Characterization in Transient Wellbore Conditions Resulting from Unintended Hydraulic Fracture Communications Utilizing MPD

Kvalo P. E.,

Duarte,

Vargas

et al. 2023

Day 2 Wed, October 04, 2023

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MPD for reservoir characterization in green field applications is often seen as vital for providing operators with valuable information about the reservoir's physical properties while drilling. This aspect of Managed Pressure Drilling (MPD) in mature fields is not often a driver for implementation as these characteristics are typically well-defined. However, external factors such as unintentional communication between drilling and fracking operations can significantly alter known reservoir characteristics. The proppant exponentially enhances the permeability of both the child and parent well. While the fracturing fluid initially increases the pore pressure and stress environment in the near wellbore region, followed by its subsequent reduction, the rate of which is dependent on the dominant regime: flow back on the parent well, pressure equalization of the reservoir, and/or diffusion of fluid into the drilling mud. The challenges and interactions associated with unintended frac communication and how primary reservoir characteristics are fundamentally altered as a result will be discussed. Additionally, the results of each reservoir characterization test can be interpreted to adjust the plan forward and utilized to navigate these transient wellbore conditions. Thus, providing clear insight into the wellbore's evolving drilling window, enabling the safe drilling and completion of the "fracked into" well.

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Detailed Reservoir Characterization for Key Strategies of Unconventional Reservoir Development

Cited by 4 publications

References 12 publications

Fine reservoir structure modeling based upon 3D visualized stratigraphic correlation between horizontal wells: methodology and its application

Fine reservoir structure modeling based upon 3D visualized stratigraphic correlation between horizontal wells: methodology and its application

Initial Water Saturation Calculation through Integrated Methods for 3D Unconventional Reservoir Modeling

Reservoir Characterization in Transient Wellbore Conditions Resulting from Unintended Hydraulic Fracture Communications Utilizing MPD

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