Landmark Graphics Corporation

Halliburton Energy Services, Inc.

Adolfo Gonzales

Robello Samuel

Yongfeng Kang

Zhengchun Liu

Jun Jiang

Aniket

Robert Franklin Mitchell

Max Orland Duncan

Rishi Adari

Samuel Robello

Aniket Aniket

Nitish Chaudhari

Robert D Gilcrist

Jenny Xie

Aniket No Last Name

Robert Mitchell

A system for designing a casing string for a well. The system comprises a processor, a non-transitory memory, a thermodynamic modeling application stored in the non-transitory memory that, when executed by the processor, models carbon dioxide (CO) material in the well using a carbon dioxide equation of state (EoS) to determine thermodynamic properties of the COmaterial, and a downhole environment modeling application stored in the non-transitory memory that, when executed by the processor determines temperatures of and pressures at well components at each of a plurality of points of a casing string design based in part on the thermodynamic properties of the COmaterial determined by the thermodynamic modeling application, and provides the temperatures of well components and pressures in the casing string at each of the plurality of points of the casing string to a casing string strength analysis application executing on the computer system.

COoperation temperature and pressure analysis and well design with COmodeling with equation of state method

This disclosure relates to systems and methods for controlling a motor based on a slide-rotate ratio while drilling a wellbore. The system includes at least one sensor disposable with respect to a drillstring and a motor communicatively coupled to the drillstring. A computing device performs operations for controlling the motor based on the slide-rotate ratio. The computing receives input data corresponding to characteristics of the drillstring, the motor, or both. The computing device calculates a hook load for multiple time intervals. The computing device determines a friction factor based on the hook load for each of the time intervals. The computing device projects a slide-rotate ratio for the motor that substantially minimizes friction while operating the drill string, and controls the motor based on the slide-rotate ratio.

Slide and rotation projection for reducing friction while drilling

Systems, methods, and computer-readable media for an integrated and comprehensive hydraulic, environmental, and mechanical tubular design analysis workflow and simulator for complex well trajectories. An example method can include obtaining data defining a configuration of a wellbore having a complex well trajectory, one or more operations to be performed at the wellbore, and one or more loads associated with the wellbore; calculating environmental conditions associated with a set of wellbore components along the complex well trajectory based on the data defining the configuration of the wellbore, the one or more operations, and the one or more loads; calculating stress conditions associated with the set of wellbore components based on the environmental conditions and the data defining the configuration of the wellbore, the one or more operations, and the one or more loads; and presenting the environmental conditions and the stress conditions via a graphical user interface.

Systems and methods for integrated and comprehensive hydraulic, thermal and mechanical tubular design analysis for complex well trajectories

A method for designing a borehole tubular for use in a borehole. The method may include defining tubular sections that make up the borehole tubular, defining a downhole operation that will be conducted using the borehole tubular at a first timestamp, determining loads that will be applied to each of the tubular sections at respective specific depths along the borehole during the downhole operation at the first timestamp, determining a design limit envelope for each of the tubular sections at the first timestamp based on design parameters of the tubular section and the specific depth of the tubular section at the first timestamp, and displaying a three-dimensional (3D) plot of the design limit envelopes of the tubular sections and the loads applied to the tubular sections as a function of depth within the borehole on a display.

Systems and methods for borehole tubular design

A method for determining annular fluid expansion ('AFE') within a borehole with a sealed casing string annulus. The method may include defining a configuration of the borehole. The method may further include defining a production operation and a borehole operation. The method may also include determining AFE within the borehole when performing the production operation. The method may further include determining AFE within the borehole when performing the borehole operation based on the AFE within the borehole when performing the production operation.

Method for predicting annular fluid expansion in a borehole

A method for assessing an integrity of metal tubular structures may comprise receiving one or more inputs, applying an algorithm to automatically select an appropriate model for a given corrosion scenario, applying a combined model including semi-empirical and multiphase flow corrosion characteristics to the one or more inputs, determining one or more corrosion parameters of either an internal pipe wall, an external pipe surface, or both, applying a corrosion correlation value to the one or more corrosion parameters to produce one or more correlated corrosion parameters, and storing the one or more correlated corrosion parameters on a computer readable medium. A system may comprise an information handling system which may comprise at least one memory operable to store computer-executable instructions, at least one communications interface to access the at least one memory, and at least one processor.

Corrosion prediction for integrity assessment of metal tubular structures

The disclosure presents processes for improving the design phase of plastic material lined tubular structures used downhole of a borehole. A plastic material lined tubular structure model is utilized for tubular structures that have a metal layer, a grout layer, and a plastic material layer. The model can use a modified wall thickness for the metal layer. A strength model can be applied to the modified critical dimensions, e.g., wall thickness parameters. A thermal model can be applied to the tubular structure to determine pressure and temperature parameters. The strength model and the thermal model outputs can be utilized by a stress analyzer to determine loads, safety factors, and design limit parameters. The plastic material lined tubular structure model can enable more efficient use of tubular structures, designing a longer operational lifetime, such as in acidic environments, or the use of thinner structures while maintaining a satisfactory operational lifetime.

Stress analysis for plastic material lined tubular structures for boreholes

A system can determine a temperature profile based on a prior production temperature profile and a reference start point pressure for a well. The system can virtually divide the well into a plurality of sections including uphill sections and downhill sections. The system can determine a gas-oil interface depth for each section of the plurality of sections from a water-oil ratio and a gas-oil ratio based on the temperature profile and the reference start point pressure. The system can determine an oil-water interface depth for each section of the plurality of sections from the gas-oil ratio and the water-oil ratio based on the temperature profile and the reference start point pressure.

Determining gas-oil and oil-water shut-in interfaces for an undulating well

System and methods for optimizing wellbore tubular design are provided. Design parameters for a wellbore tubular component are determined based on different types of axial loads expected during a downhole operation. The design parameters include load conditions at load points along the tubular component. An equivalent axial load is calculated for each load point, based on the corresponding load conditions. Design limits for the different types of axial loads are determined based on associated design parameters. A counter-load pressure is determined for at least one load point selected for each type of axial load, based on the corresponding equivalent axial load for each load point and a corresponding design limit for each type of axial load. At least one of the design limits is adjusted for the different types of axial loads, based on the counter-load pressure of the selected load point for each type of axial load.

Optimized visualization of loads and resistances for wellbore tubular design

A method for determining casing wear of casing in a wellbore, a computer program product for determining a back-calculated casing wear factor (CWF) value for casing in a wellbore, and a well site controller are provided herein. In one embodiment, the well site controller includes: (1) an interface configured to receive actual remaining wall thickness (RWT) values that correspond to a set of casing depth values of a wellbore and (2) a processor configured to determine a back-calculated casing wear factor (CWF) value for the wellbore based on a comparison between the actual RWT value and an estimated RWT value, for the set of casing depth values, where the estimated RWT value is calculated using an estimated CWF value as input.

Method and apparatus to predict casing wear for well systems

A method for simulating a well system can include providing a well system model, providing a jet pump model, providing at least one calculation engine, inputting an input parameter, defining a mechanical configuration of the well system, integrating a jet pump model into a well system model, computing a solution to a model, and determining at least one production condition of a well system. A computer readable medium can have instructions stored thereon that, when executed by a processor, can cause the processor to perform a method including accessing a well system model, accessing a jet pump model, integrating the jet pump model and the well system model, computing a solution to a combined model, and determining a production condition of a well system.

Wellbore thermal flow, stress and well loading analysis with jet pump

A system provides thermal and stress analysis of complex well operations above the end of the downhole string to meet the analysis needs of downhole operations such as hydraulic fracturing in unconventional oil and gas field development.

Wellbore thermal, pressure, and stress analysis above end of operating string

Damage to a casing string in a wellbore resulting from a wellbore operation can be predicted. For example, a stiff string model can be used to determine a contact point between the casing string and a well tool positionable within the casing string for performing the wellbore operation. The stiff string model can be used to determine a force of the well tool against the casing string at the contact point. The force can be used to determine a volume of damage to the casing string proximate to the contact point. A depth of a groove formed in the casing string proximate to the contact point can be determined based on the volume of damage.

Determining damage to a casing string in a wellbore

A method for simulating the effects of rupture disk failure on annular fluid expansion in sealed and open annuli to mitigate annular pressure buildup in a wellbore comprises the steps of: determining whether an internal region or an external region for a pair of casing string annuli is open; and calculating at least one of an adjusted internal annular pressure buildup and an adjusted external annular pressure buildup for at least one of the internal annular region and the external annular region of the casing string annuli.

Simulating the effects of rupture disk failure on annular fluid expansion in sealed and open annuli

Systems and methods for determining vector-ratio safety factors for wellbore tubular design are provided. Pressure and temperature data for at least one load point along a tubular component of a wellbore are obtained. An effective failure axial load expected at the load point is calculated during a downhole operation to be performed along one or more sections of the wellbore within a subsurface formation, based on the obtained data. An upper boundary and a lower boundary for the effective failure axial load are determined, based on physical properties of the tubular component at the load point. A midpoint of the effective failure axial load is calculated based on the upper and lower boundaries. A critical failure differential pressure is calculated, based on the midpoint of the effective failure axial load. A vector-ratio safety factor is calculated, based on the critical failure differential pressure relative to the effective failure axial load.

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Houston, TX, United States of America

Adolfo Gonzales