Weatherford Technology Holdings, LLC

Exxonmobil Upstream Research Company

Reeves Wireline Technologies Limited

Ovunc Mutlu

Mojtaba Pordel Shahri

Jian Huang

Mohammadreza Safariforoshani

Clayton S Smith

Mojtaba Karimi

Rajesh Kumar Saini

Don M Hannegan

Jennifer Anne Market

Leonid Vigderman

Chih-Chau Hwang

Francisco E Fragachan

Kern L Smith

Rodrick Myers

Kedar M Deshpande

Duane Treybig

Mathew M Samuel

Ganeswara Rao Dasari

David Eccles

Sunil Lakshminarayanan

Mohammad Reza Safariforoshani

Trevor Oar

Systems and methods for predicting an accurate in-situ stress field in a wellbore in a formation are disclosed. The in-situ stress field is calculated using an optimizing process that takes into account parameters relating to induced tensile fracture that are derived from wellbore image logs and other input data relating to the wellbore. Once values for the in-situ stress field are predicted, those values can be used to generate synthetic image logs and fracturing data which can then be compared to the original image logs and fracturing data to determine the accuracy of the results and if needed repeat the operation to obtain more accurate results.

System and method for stress inversion via image logs and fracturing data

A method of calculating the unconfined compressive strength (UCS) of subterranean rock having a borehole formed or being formed therein comprises the steps of:

Method of and apparatus for calculating UCS and CCS

Predicting downhole acoustic tool responses due to stress-induced anisotropy by performing at least the following: receiving a plurality of input data corresponding to at least one well site comprising a wellbore; constructing a three-dimensional geomechanical model based at least in part on the input data; creating at least one near field versus far field stress distribution that corresponds to the wellbore from the three-dimensional geomechanical model; creating, at least one near wellbore versus far-field velocity distribution using the at least one near field versus far field stress distribution; comparing the downhole acoustic tool response property that indicates a downhole acoustic tool's penetration depth for a subsurface geological formation with the near wellbore velocity fields; and flagging, where the downhole acoustic tool response property stays within the near-wellbore velocity field.

Predicting stress-induced anisotropy effect on acoustic tool response

Systems and methods for wellbore strengthening are disclosed. An effective way to strengthen a wellbore and prevent future fractures during drilling operations is to induce fractures having a desired fracture width profile and fracture length. Surface back pressure can be used to accurately induce such fractures. The induced fractures which are then sealed can increase fracture gradient of the wellbore thus mitigating future fractures.

System and method for managed pressure wellbore strengthening

The disclosure pertains to the design and implementation of a diversion procedure for geologic openings. Embodiments involve performing a screening analysis to determine if a well or formation is appropriate for stimulation. If a well is appropriate, a modeling analysis is performed to determine candidate parameters for a diversion procedure. The analysis is divided into two segments, a dry analysis of jamming and a wet and full-physics-based analysis of plugging. The jamming analysis provides candidates to the plugging analysis to reduce the work of the more intensive wet full-physics modeling.

Systems and methods for intelligent diversion design and application

Systems and methods for analyzing and designing a customized pulse fracturing operation for fracturing a wellbore in a reservoir formation are disclosed. Pulsed fracturing can create multiple fractures that radiate away from the wellbore while minimizing near wellbore damage. This network can further be extended into the reservoir by utilizing an optimized pumping rate over a predetermined amount of time. The optimized pulse rate and duration can be determined by using a geomechanical and a reservoir simulator which can help in quantifying the production efficiency of the induced fracture network.

System and method for modeling and design of pulse fracturing networks

Systems and methods generate optimized formation fracturing operational parameters by iteratively optimizing bottom hole temperature design, perforation design, fracturing fluid pulse design, and proppant design based on formation properties, proppant properties, candidate selection, flow and geomechanical modeling, and engineering design, where the systems and methods as implemented on a digital processing unit.

Systems and methods for optimizing formation fracturing operations

Systems and methods for an integrated wellbore stress, stability and strengthening analysis are disclosed. An integrated geomechanical tool can be used to analyze and evaluate stress along the length of the wellbore to identify a safe drilling mud weight window and help identify troublesome zones in the wellbore. Fracture length may then be predicted in the identified troublesome zones by using a stress tensor calculated during the stress analysis. The calculated fracture length may be used to perform a strengthening analysis. After performing strengthening analysis, mud loss may be predicted based on predicted fracture size calculated during the stress, stability and strengthening analyzes.

System and method for integrated wellbore stress, stability and strengthening analyses

A method for predicting localized damage and naturally occurring fractures in a subsurface region is provided. This invention uses a hybrid FEM-DEM (i.e. finite-discrete element) framework combined with a fracture risking analysis and fracture initiation and propagation criteria, to model the transition of rock from a state of continuum to discontinuum. The risking analysis combines results from other natural fracture prediction tools (e.g. displacement discontinuity method, restoration analysis, curvature analysis, analytical solutions, continuum analysis) to augment FEM-DEM solutions, such as by providing remote and local boundary conditions and identifying potential regions of anticipated damage and fracturing. Natural fractures and damage information is extracted from the modeling results and may be used directly for predictions or used as input into other fracture analysis tools or techniques. The FEM-DEM and risking techniques can be incorporated into a variety of numerical simulation software packages that use a finite-discrete method solver.

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Ovunc Mutlu