Patent application number | Description | Published |
20130098604 | DETECTION AND QUANTIFICATION OF ISOLATION DEFECTS IN CEMENT - A method for evaluating wellbore integrity including introducing a drill to a surface of a casing encompassing an annulus, enclosing the drill in a housing hydraulically isolating the surface, drilling through the casing and into cement surrounding the casing, observing a pressure of the fluid, and using the pressure observation and a drill position to evaluate a presence of a defect and a location of the defect. Apparatus for evaluating wellbore integrity including a probe comprising a drill, wherein the probe is hydraulically isolated from the wellbore, a valve that encompasses the drill, a pressure gauge to measure the pressure of the fluid within the housing, a pressure gauge to measure the pressure in the system outside the housing, and equipment to compare the pressure measurements and the position of the drill and to evaluate a presence and a location of the defect. | 04-25-2013 |
20130304617 | METHOD OF VALUATION OF GEOLOGICAL ASSET OR INFORMATION RELATING THERETO IN THE PRESENCE OF UNCERTAINTIES - Methods are disclosed for assigning a value to a geological asset or information relating thereto in the presence of private and public sources of uncertainties. The private and public uncertainties associated with a geological asset or information associated therewith are defined, and private uncertainties are assigned a subjective probability representing the best state of knowledge currently available. A multi-dimensional valuation-time lattice is constructed using the subjective probabilities for the private uncertainties and using risk-neutral probabilities for the public uncertainties. A backward recursion through the multi-dimensional lattice is performed in order to generate a present value for the asset given the present information available. During the backward recursion, a tally of delta hedging coefficients is generated and stored in order to provide an operational “map” or “decision pathway” should the project move forward. | 11-14-2013 |
20140278110 | TARGETED SURVEY DESIGN UNDER UNCERTAINTY - A method, apparatus, and program product utilize global sensitivity analysis (GSA) based on variance decomposition to calculate and apportion the contributions to a total variance of a measurement signal from uncertain input parameters of a subsurface model in connection with designing targeted surveys. Through the use of global sensitivity analysis in this manner, the geometry for a survey may be determined based on a desired target of the design, e.g., based on spatial properties (e.g., reservoir zone of interest) and/or physical properties (e.g., porosity, fluid density, rock physics properties) to select locations (e.g., source-receiver pairs) with greater uncertainty contributions from parameter group(s) of interest. | 09-18-2014 |
20150060053 | METHOD FOR ADAPTIVE OPTIMIZING OF HETEROGENEOUS PROPPANT PLACEMENT UNDER UNCERTAINTY - Apparatus and methods for delivering and placing proppant to a subterranean formation fracture including identifying control variables and uncertain parameters of the proppant delivery and placement, optimizing a performance metric of the proppant delivery and placement under uncertainty, calculating sensitivity indices and ranking parameters according to a relative contribution in total variance for an optimized control variable, and updating a probability distribution for parameters, repeating optimizing comprising the probability distribution, and evaluating a risk profile of the optimized performance metric using a processor. Some embodiments may deliver proppant to the fracture using updated optimized values of control variables. | 03-05-2015 |
Patent application number | Description | Published |
20090250208 | Tool And Method For Evaluating Fluid Dynamic Properties Of A Cement Annulus Surrounding A Casing - The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over time is a function of among other things, the initial probe pressure, the formation pressure, and the permeability, and using the measured change over time to determine an estimated permeability. The estimated permeability is useful in determining whether carbon dioxide can be effectively sequestered in the formation below or at the depth of measurement without significant leakage through the cement annulus. | 10-08-2009 |
20090250209 | METHOD AND TOOL FOR EVALUATING FLUID DYNAMIC PROPERTIES OF A CEMENT ANNULUS SURROUNDING A CASING - The permeability of the cement annulus surrounding a casing is measured by locating a tool inside the casing, placing a probe of the tool in hydraulic contact with the cement annulus, measuring the change of pressure in the probe over time, where the change in pressure over time is a function of among other things, the initial probe pressure, the formation pressure, and the permeability, and using the measured change over time to determine an estimated permeability. By drilling into the cement and making additional measurements of the change of pressure in the probe over time, a radial profile of the cement permeability can be generated. | 10-08-2009 |
20100299126 | METHOD FOR UNCERTAINTY QUANTIFIATION IN THE PERFORMANCE AND RISK ASSESSMENT OF A CARBON DIOXIDE STORAGE SITE | 11-25-2010 |
20120101730 | METHOD AND APPARATUS UTILIZING NUCLEAR MAGNETIC RESONANCE MEASUREMENTS FOR ESTIMATING RESIDUAL CARBON DIOXIDE SATURATION IN AQUIFIERS - Percolation theory is applied to establish a connection between magnetization decay of nuclear magnetic resonance (NMR) measurements and residual carbon dioxide saturation (S | 04-26-2012 |
20130110483 | METHOD FOR MEASUREMENT SCREENING UNDER RESERVOIR UNCERTAINTY | 05-02-2013 |
20130268202 | METHOD AND APPARATUS UTILIZING NUCLEAR MAGNETIC RESONANCE MEASUREMENTS FOR ESTIMATING RESIDUAL CARBON DIOXIDE SATURATION IN AQUIFERS - Percolation theory is applied to establish a connection between magnetization decay of nuclear magnetic resonance (NMR) measurements and residual carbon dioxide saturation (S | 10-10-2013 |