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You searched for subject:(formation hydraulic properties). Showing records 1 – 2 of 2 total matches.

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1. Tandon, Saurabh. Identification of productive zones in unconventional reservoirs.

Degree: MSin Engineering, Petroleum Engineering, 2015, University of Texas – Austin

Large-scale multi-stage fracture treatments in long horizontal wells have enabled economic hydrocarbon production from source mudrocks. A productive zone in mudrocks is defined as a region with high production or high productive potential. Rock fracability is an important parameter used in evaluating the productive potential in a source mudrocks. The fracability of the rock is the degree to which hydraulic fracturing can create a dense and conductive fracture network upon fracturing in the formation. However, there is no agreement on the formation geomechanical properties that result in a source rock having good fracability. The objective of this thesis to identify formation properties that may be related to fracability and to identify how these properties may be assessed from well logs. Once the properties have been identified, data from 15 wells in the Barnett shale are used to assess the effect of the properties on long-term production. We performed a sensitivity study on the effect of formation properties on the size of the stimulated rock volume. Field-scale simulations of a single fracturing stage were performed with CFRAC (Complex Fracturing ReseArch Code), a fracture simulator that couples fluid flow and stresses induced by fracture deformation (sliding and opening) in large, discrete fracture networks. Two-hundred simulations were performed with a uniform space filling design: a low discrepancy quasi-random sequence uniformly filling the hyper-parameter space. Each simulation used a different stochastically generated natural fracture network even though each was statistically similar in terms of fracture orientation, density, and length. Simulation results were post-processed to estimate a measure of the stimulated reservoir volume in each simulation. Parameters affecting tendency for shear stimulation fracture conductivity had the biggest effect on the stimulated reservoir volume. Unfortunately, these parameters are not easy to estimate in-situ. A review of the literature was carried out to understand the relationship between unpropped fracture conductivity (which cannot easily be measured in-situ) and other formation properties that could be quantified with available techniques. We used the concept of shear dilation angle to describe increase in conductivity in response to sliding. The dilation angle can be correlated to the joint compressive strength of the rock which is equal to the unconfined compressive strength for an unaltered rock. Unconfined compressive strength can be estimated from sonic logs. This hypothesis was tested on 15 wells in the Barnett Shale. Hydrocarbon-bearing zones were identified in the wells using the gamma ray log and the cumulative mechanical properties of the zones were compared to the long-term production of the wells. Results show that including the unconfined compressive strength in finding productive zones will improve the effectiveness of prediction models. Such a behavior alludes to the possibility that properties affecting unpropped fracture conductivity should be given… Advisors/Committee Members: McClure, Mark William (advisor).

Subjects/Keywords: Unconventional; Sweet spots; Productive zones; Unconventional reservoirs; Hydraulic fracturing; Rock fracability; Formation properties; Well logs; Field-scale simulations; Unpropped fracture conductivity; Unconfined compressive strength; Compressive strength; Unconventional plays

…We performed a sensitivity study on the effect of formation properties on the size of the… …measured in-situ) and other formation properties that could be quantified with available… …each of these properties affects the production in unconventional formation. The total… …Hydraulic fractures can interact with geologic features in the formation to produce a complex… …objective of this thesis is to develop hypotheses about how formation properties related to… 

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Tandon, S. (2015). Identification of productive zones in unconventional reservoirs. (Masters Thesis). University of Texas – Austin. Retrieved from http://hdl.handle.net/2152/46991

Chicago Manual of Style (16th Edition):

Tandon, Saurabh. “Identification of productive zones in unconventional reservoirs.” 2015. Masters Thesis, University of Texas – Austin. Accessed March 05, 2021. http://hdl.handle.net/2152/46991.

MLA Handbook (7th Edition):

Tandon, Saurabh. “Identification of productive zones in unconventional reservoirs.” 2015. Web. 05 Mar 2021.

Vancouver:

Tandon S. Identification of productive zones in unconventional reservoirs. [Internet] [Masters thesis]. University of Texas – Austin; 2015. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/2152/46991.

Council of Science Editors:

Tandon S. Identification of productive zones in unconventional reservoirs. [Masters Thesis]. University of Texas – Austin; 2015. Available from: http://hdl.handle.net/2152/46991

2. Taylor, Kendrick C. Application of borehole geophysical methods to shallow groundwater investigations.

Degree: 1987, University of Nevada – Reno

Borehole geophysical methods have been used extensively for petroleum and mineral exploration; but due to differences in environment and survey objective, modifications of both equipment and interpretation are necessary for shallow groundwater applications. These applications require the use of complementary borehole measurements which can be related to the formation properties by comparison to core samples. Different interpretation strategies must be developed for different environments, strategies for use in unsaturated, saturated with clay present, saturated without clay present, and hydraulically anisotropic environments are developed. Parameters that can be determined are porosity, moisture content, hydraulic conductivity, groundwater velocity, cation exchange content, and pore fluid conductivity. All logging instrumentation measures a property over a short interval of the well. It is important when combining logs to insure that all logs used in the comparison are vertical averages of the same portion with respect to both depth and length of the well. It is also possible to reduce the effect of the vertical averaging by the instrumentation through the use of numerical techniques. A field example is used to demonstrate these methods. The techniques presented make it practical to determine a formation hydraulic properties on a scale of a few tens of centimeters. This high resolution distribution of the formation in turn permits the development of a class of contaminate transport models which utilize the high resolution description of the aquifer variability. These models do not require large scale dependent dispersity terms to match field data because the contaminate movement is realistically described by shear flow in the high resolution advective flow field of the model. A one dimensional model is presented as an example of this class of model. Advisors/Committee Members: Wheatcraft, Stephen (advisor).

Subjects/Keywords: borehole geophysical methods; petroleum exploration; mineral exploration; environment; survey objective; modifications of equipment; modifications of interpretation; shallow groundwater applications; complimentary borehole measurements; formation properties; core; clay; samples; interpretation strategies; unsaturated with clay present; saturated with clay present; saturated without clay present; hydraulically anisotropic environments; porosity; moisture content; hydraulic conductivity; groundwater velocity; cation exchange content; pore fluid conductivity; logging instrumentation measures; wells; logs; vertical averages; depth of wells; length of wells; numerical techniques; formation hydraulic properties; high resolution distribution; contaminate transport models; high resolution description; aquifer variability; dependent diversity; contaminate movement; shear flow; high resolution advective flow field; Mackay Science Project; groundwater  – sampling; groundwater flow; hydraulic measurements; hydrogeology

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Taylor, K. C. (1987). Application of borehole geophysical methods to shallow groundwater investigations. (Thesis). University of Nevada – Reno. Retrieved from http://hdl.handle.net/11714/1743

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16th Edition):

Taylor, Kendrick C. “Application of borehole geophysical methods to shallow groundwater investigations.” 1987. Thesis, University of Nevada – Reno. Accessed March 05, 2021. http://hdl.handle.net/11714/1743.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Taylor, Kendrick C. “Application of borehole geophysical methods to shallow groundwater investigations.” 1987. Web. 05 Mar 2021.

Vancouver:

Taylor KC. Application of borehole geophysical methods to shallow groundwater investigations. [Internet] [Thesis]. University of Nevada – Reno; 1987. [cited 2021 Mar 05]. Available from: http://hdl.handle.net/11714/1743.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Taylor KC. Application of borehole geophysical methods to shallow groundwater investigations. [Thesis]. University of Nevada – Reno; 1987. Available from: http://hdl.handle.net/11714/1743

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.