Wellbore Stability Analysis Based on 3D Geo-Mechanical Model of an Algerian Southeastern Field

Eladj, Said; Lounissi, Tanina Kenza; Doghmane, Mohamed Zinelabidine; Djeddi, Mabrouk

doi:10.1007/978-3-030-73026-0_136

Cited by 2 publications

(4 citation statements)

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“…In addition, logging data for the four drilled wells were prepared and used to correlate the inverted model to the directly measured logs. Figure 1 demonstrates the high correlation between the density volume obtained from the inverted model and the density from the well logs ( [16,17]). proposed well in the studied field (well 5) with deep interpretations of the results obtained for the four wells.…”

Section: Seismic Inversion Modelmentioning

confidence: 99%

“…Once the grids were created, they were filled with the mechanical properties that characterized the rock; namely, the density, the elastic properties (Young's modulus, Poisson ratio, and Biot coefficient), and the resistance properties (UCS, the resistance of the rock to tension, and the friction angle) [10]. These properties were calculated using the same method as in the 1D model constructed earlier in this study and with the same mathematical relationships [17]. The inputs of the model were the density volumes, V p and V s , and the dynamic elastic properties, which were determined directly from the inputs through the Gassmann equations (Equations ( 2)-( 5)) [36,37].…”

Section: Rock Typingmentioning

confidence: 99%

“…It should be noted that the state of stress at this step represented the initial conditions [18]. In step three, the constraints and pore pressure were iteratively calculated until they correlated with data at a predefined error threshold [17]. The different constraints that affected the model were calculated as follows:…”

Section: Calculation Of Limiting Conditions and Constraintsmentioning

confidence: 99%

“…As soon as the position of the new well (well 5) was defined, the 3D geomechanical model was used to analyse the wellbore stability and determine its ideal direction, in addition to establishing the optimal mud density window to minimize reservoir damage ( [6,17,41]). The analysis included several trajectories, but only the alternative trajectories were selected for well 5.…”

Section: Determination Of the Mud Density Windowmentioning

confidence: 99%

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3D Geomechanical Model Construction for Wellbore Stability Analysis in Algerian Southeastern Petroleum Field

et al. 2022

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The main objective of this research work was the wellbore stability evaluation of oil and gas wells based on a 3D geomechanical model, which as constructed using seismic inversion in a southeastern Algerian petroleum field. The seismic inversion model was obtained by using an iterative method and Aki and Richards approximation. Since the correlation between the inversion model and the log data was high at the wells, the reservoir was efficiently characterized and its lithology carefully discriminated in order to build a reliable 3D geomechanical model. The latter was further used to suggest the drilling mud weight window for the ongoing wells (well 5) and to examine the stability of four previously drilled wells. The main contribution of this study is providing a 3D geomechanical model that allows the optimization of drilling mud weight parameters so that a wellbore’s stability is guaranteed, on the one hand, and, on the other hand, so that the reservoir damage brought about by excessive surfactant use can be prevented. Indeed, the mud parameters are not just important for the drilling process’s effectiveness but also for logging operations. Since the tools have limited investigation diameters, with excessive use of surfactant, the invaded zone can become larger than the tools’ investigation diameter, which makes their logs unreliable. Hence, the 3D geomechanical model presented here is highly recommendable for the proposition of new wells, entailing less exploration uncertainty and more controllable productivity.

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Section: Seismic Inversion Modelmentioning

confidence: 99%